74HCT9046AD,118

74HCT9046A PLL with band gap controlled VCO Rev. 9 — 20 March 2020 Product data sheet 1. General description The 74HCT9046A. This device features reduced input threshold levels to allow interfacing to TTL logic levels. Inputs also include clamp diodes, this enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits • • • • • • • • • • • • • • • Operation power supply voltage range from 4.5 V to 5.5 V Low power consumption Complies with JEDEC standard no. 7A Inhibit control for ON/OFF keying and for low standby power consumption Center frequency up to 17 MHz (typical) at VCC = 5.5 V Choice of two phase comparators: • PC1: EXCLUSIVE-OR • PC2: Edge-triggered JK flip-flop No dead zone of PC2 Charge pump output on PC2, whose current is set by an external resistor Rbias Center frequency tolerance ±10 % Excellent Voltage Controlled Oscillator (VCO) linearity Low frequency drift with supply voltage and temperature variations On-chip band gap reference Glitch free operation of VCO, even at very low frequencies Zero voltage offset due to operational amplifier buffering ESD protection: • HBM JESD22-A114F exceeds 2000 V • MM JESD22-A115-A exceeds 200 V 3. Applications • • • • • • • FM modulation and demodulation where a small center frequency tolerance is essential Frequency synthesis and multiplication where a low jitter is required (e.g. video picture-in-picture) Frequency discrimination Tone decoding Data synchronization and conditioning Voltage-to-frequency conversion Motor-speed control 4. Ordering information Table 1. Ordering information Type number Package Temperature range Name 74HCT9046AD -40 °C to +125 °C SO16 Description Version plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 74HCT9046A Nexperia PLL with band gap controlled VCO 5. Functional diagram fout C1 C1A 6 fin VCC C1B VCO_OUT COMP_IN SIG_IN 7 4 3 14 16 9046A R2 12 R2 PC1_OUT/ 2 PCP_OUT PHASE COMPARATOR 1 VCO R1 11 PHASE COMPARATOR 2 R1 13 PC2_OUT 15 RB R4 Rbias 5 10 9 DEM_OUT VCO_IN INH 8 1 GND GND R3 C2 Rs Fig. 1. mbd040 Block diagram 3 COMP_IN 14 SIG_IN 15 RB 6 C1A 7 C1B 11 R1 12 9 R2 VCO_IN 5 INH PC1_OUT/ PCP_OUT 2 PC2_OUT 13 Φ PLL 9046A Φ VCO_OUT 3 14 4 VCO DEM_OUT 10 COMP_IN SIG_IN 6 C1A 7 C1B Logic symbol 74HCT9046A Product data sheet 13 2 11 R1 12 R2 DEM_OUT 10 15 RB VCO_OUT 4 9 VCO_IN 5 INH mbd038 Fig. 2. PC1_OUT/ PCP_OUT PC2_OUT mbd039 Fig. 3. IEC logic symbol All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 2 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO fout C1 6 C1A 7 fin 3 4 C1B VCO_OUT COMP_IN 14 SIG_IN PC1 PC1_OUT/ PCP_OUT 2 Vref2 12 R2 R3 VCO R2 logic 1 Vref1 11 D Q up PCP CP R1 Q RD R1 logic 1 10 DEM_OUT D CP Vref1 RS Vref2 PC2_OUT 13 Q Q RD down CHARGE PUMP (1) R3' RB 15 Rbias BAND GAP VCO_IN INH 9 5 Vref2 (1) Fig. 4. R4 C2 R3' = Rbias /17 mbd102 Logic diagram 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 3 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 6. Pinning information 6.1. Pinning 74HCT9046A GND 1 16 VCC PC1_OUT/PCP_OUT 2 15 RB COMP_IN 3 14 SIG_IN VCO_OUT 4 13 PC2_OUT INH 5 12 R2 C1A 6 11 R1 C1B 7 10 DEM_OUT GND 8 9 VCO_IN 001aae500 Fig. 5. Pin configuration 6.2. Pin description Table 2. Pin description Symbol Pin Description GND 1 ground (0 V) of phase comparators PC1_OUT/PCP_OUT 2 phase comparator 1 output or phase comparator pulse output COMP_IN 3 comparator input VCO_OUT 4 VCO output INH 5 inhibit input C1A 6 capacitor C1 connection A C1B 7 capacitor C1 connection B GND 8 ground (0 V) VCO VCO_IN 9 VCO input DEM_OUT 10 demodulator output R1 11 resistor R1 connection R2 12 resistor R2 connection PC2_OUT 13 phase comparator 2 output; current source adjustable with Rbias SIG_IN 14 signal input RB 15 bias resistor (Rbias) connection VCC 16 supply voltage 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 4 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 7. Functional description The 74HCT9046A is a phase-locked-loop circuit that comprises a linear VCO and two different phase comparators (PC1 and PC2) with a common signal input amplifier and a common comparator input, see Fig. 1. The signal input can be directly coupled to large voltage signals (CMOS level), or indirectly coupled (with a series capacitor) to small voltage signals. A self-bias input circuit keeps small voltage signals within the linear region of the input amplifiers. With a passive low-pass filter, the 74HCT9046A forms a second-order loop PLL. The principle of this phase-locked-loop is based on the familiar 74HCT4046A. However extra features are built-in, allowing very high-performance phase-locked-loop applications. This is done, at the expense of PC3, which is skipped in this 74HCT9046A. The PC2 is equipped with a current source output stage here. Further a band gap is applied for all internal references, allowing a small center frequency tolerance. The details are summed up in Section 7.1. If one is familiar with the 74HCT4046A already, it will do to read this section only. 7.1. Differences with respect to the familiar 74HCT4046A • • • • • • • • • A center frequency tolerance of maximum ±10 %. The on board band gap sets the internal references resulting in a minimal frequency shift at supply voltage variations and temperature variations. The value of the frequency offset is determined by an internal reference voltage of 2.5 V instead of VCC - 0.7 V; In this way the offset frequency will not shift over the supply voltage range. A current switch charge pump output on pin PC2_OUT allows a virtually ideal performance of PC2; The gain of PC2 is independent of the voltage across the low-pass filter; Further a passive low-pass filter in the loop achieves an active performance. The influence of the parasitic capacitance of the PC2 output plays no role here, resulting in a true correspondence of the output correction pulse and the phase difference even up to phase differences as small as a few nanoseconds. Because of its linear performance without dead zone, higher impedance values for the filter, hence lower C-values, can be chosen; correct operation will not be influenced by parasitic capacitances as in case of the voltage source output using the 74HCT4046A. No PC3 on pin RB but instead a resistor connected to GND, which sets the load/unload currents of the charge pump (PC2). Extra GND pin 1 to allow an excellent FM demodulator performance even at 10 MHz and higher. Combined function of pin PC1_OUT/PCP_OUT. If pin RB is connected to VCC (no bias resistor Rbias) pin PC1_OUT/PCP_OUT has its familiar function viz. output of PC1. If at pin RB a resistor (Rbias) is connected to GND it is assumed that PC2 has been chosen as phase comparator. Connection of Rbias is sensed by internal circuitry and this changes the function of pin PC1_OUT/PCP_OUT into a lock detect output (PCP_OUT) with the same characteristics as PCP_OUT of pin 1 of the 74HCT4046A. The inhibit function differs. For the 74HCT4046A a HIGH-level at the inhibit input (pin INH) disables the VCO and demodulator, while a LOW-level turns both on. For the 74HCT9046A a HIGH-level on the inhibit input disables the whole circuit to minimize standby power consumption. 7.2. VCO The VCO requires one external capacitor C1 (between pins C1A and C1B) and one external resistor R1 (between pins R1 and GND) or two external resistors R1 and R2 (between pins R1 and GND, and R2 and GND). Resistor R1 and capacitor C1 determine the frequency range of the VCO. Resistor R2 enables the VCO to have a frequency offset if required (see Fig. 4). The high input impedance of the VCO simplifies the design of the low-pass filters by giving the designer a wide choice of resistor/capacitor ranges. In order not to load the low-pass filter, a demodulator output of the VCO input voltage is provided at pin DEM_OUT. The DEM_OUT voltage equals that of the VCO input. If DEM_OUT is used, a series resistor (Rs) should be connected from pin DEM_OUT to GND; if unused, DEM_OUT should be left open. The VCO output (pin VCO_OUT) can be connected directly to the comparator input (pin COMP_IN), or connected via a 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 5 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO frequency divider. The output signal has a duty cycle of 50 % (maximum expected deviation 1 %), if the VCO input is held at a constant DC level. A LOW-level at the inhibit input (pin INH) enables the VCO and demodulator, while a HIGH-level turns both off to minimize standby power consumption. 7.3. Phase comparators The signal input (pin SIG_IN) can be directly coupled to the self-biasing amplifier at pin SIG_IN, provided that the signal swing is between the standard HC family input logic levels. Capacitive coupling is required for signals with smaller swings. 7.3.1. Phase Comparator 1 (PC1) This circuit is an EXCLUSIVE-OR network. The signal and comparator input frequencies (fi) must have a 50 % duty cycle to obtain the maximum locking range. The transfer characteristic of PC1, assuming ripple (fr = 2fi) is suppressed, is: where: • • VDEM_OUT is the demodulator output at pin DEM_OUT VDEM_OUT = VPC1_OUT (via low-pass) The phase comparator gain is: The average output voltage from PC1, fed to the VCO input via the low-pass filter and seen at the demodulator output at pin DEM_OUT (VDEM_OUT), is the resultant of the phase differences of signals (SIG_IN) and the comparator input (COMP_IN) as shown in Fig. 6. The average of VDEM_OUT is equal to 0.5VCC when there is no signal or noise at SIG_IN and with this input the VCO oscillates at the center frequency (f0). Typical waveforms for the PC1 loop locked at f0 are shown in Fig. 7. This figure also shows the actual waveforms across the VCO capacitor at pins C1A and C1B (VC1A and VC1B) to show the relation between these ramps and the VCO_OUT voltage. The frequency capture range (2f0) is defined as the frequency range of input signals on which the PLL will lock if it was initially out-of-lock. The frequency lock range (2fL) is defined as the frequency range of the input signals on which the loop will stay locked if it was initially in lock. The capture range is smaller or equal to the lock range. With PC1, the capture range depends on the low-pass filter characteristics and can be made as large as the lock range. This configuration remains locked even with very noisy input signals. Typical behavior of this type of phase comparator is that it may lock to input frequencies close to the harmonics of the VCO center frequency. 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 6 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mbd101 VCC VDEM_OUT(AV) 0.5VCC 0 Fig. 6. 0o 90 o ΦPC_IN 180 o Phase comparator 1; average output voltage as a function of input phase difference SIGN_IN COMP_IN VCO_OUT PC1_OUT VCO_IN VCC GND VC1A C1A VC1B C1B mbd100 Fig. 7. Typical waveforms for PLL using phase comparator 1; loop-locked at f0 7.3.2. Phase Comparator 2 (PC2) This is a positive edge-triggered phase and frequency detector. When the PLL is using this comparator, the loop is controlled by positive signal transitions and the duty cycles of SIG_IN and COMP_IN are not important. PC2 comprises two D-type flip-flops, control gating and a 3-state output stage with sink and source transistors acting as current sources, henceforth called charge pump output of PC2. The circuit functions as an up-down counter (see Fig. 4) where SIG_IN causes an up-count and COMP_IN a down count. The current switch charge pump output allows a virtually ideal performance of PC2, due to appliance of some pulse overlap of the up and down signals, see Fig. 8a. The pump current Icp is independent from the supply voltage and is set by the internal band gap reference of 2.5 V. Where Rbias is the external bias resistor between pin RB and ground. The current and voltage transfer function of PC2 are shown in Fig. 9. The phase comparator gain is: 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 7 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO V CC up Icp VCC PC2_OUT Icp up C2 down PC2_OUT R3' VC2_OUT Icp down Δ Φ = ΦPC_IN pulse overlap of approximately 15 ns mbd046 mbd099 a. At every ΔΦ, even at zero ΔΦ both switches are closed simultaneously for a short period (typically 15 ns). Fig. 8. C2 b. Comparable voltage-controlled switch The current switch charge pump output of PC2 VCC +Icp VDEM_OUT(AV) 0 Icp × R 0.5VCC - Icp - 2π 0 ΦPC_IN 0 - 2π +2π 001aak442 a. Current transfer Fig. 9. 0 ΦPC_IN +2π 001aak443 b. Voltage transfer. This transfer can be observed at PC2_OUT by connecting a resistor (R = 10 kΩ) between PC2_OUT and 0.5VCC. Phase comparator 2 current and voltage transfer characteristics When the frequencies of SIG_IN and COMP_IN are equal but the phase of SIG_IN leads that of COMP_IN, the up output driver at PC2_OUT is held ‘ON’ for a time corresponding to the phase difference (ΦPC_IN). When the phase of SIG_IN lags that of COMP_IN, the down or sink driver is held ‘ON’. When the frequency of SIG_IN is higher than that of COMP_IN, the source output driver is held ‘ON’ for most of the input signal cycle time and for the remainder of the cycle time both drivers are ‘OFF’ (3-state). If the SIG_IN frequency is lower than the COMP_IN frequency, then it is the sink driver that is held ‘ON’ for most of the cycle. Subsequently the voltage at the capacitor (C2) of the low-pass filter connected to PC2_OUT varies until the signal and comparator inputs are equal in both phase and frequency. At this stable point the voltage on C2 remains constant as the PC2 output is in 3-state and the VCO input at pin 9 is a high-impedance. Also in this condition the signal at the phase comparator pulse output (PCP_OUT) has a minimum output pulse width equal to the overlap time, so can be used for indicating a locked condition. 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 8 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO Thus for PC2 no phase difference exists between SIG_IN and COMP_IN over the full frequency range of the VCO. Moreover, the power dissipation due to the low-pass filter is reduced because both output drivers are OFF for most of the signal input cycle. It should be noted that the PLL lock range for this type of phase comparator is equal to the capture range and is independent of the low-pass filter. With no signal present at SIG_IN the VCO adjust, via PC2, to its lowest frequency. By using current sources as charge pump output on PC2, the dead zone or backlash time could be reduced to zero. Also, the pulse widening due to the parasitic output capacitance plays no role here. This enables a linear transfer function, even in the vicinity of the zero crossing. The differences between a voltage switch charge pump and a current switch charge pump are shown in Fig. 11. SIG_IN COMP_IN VCO_OUT 15 ns typical UP PC_IN DOWN CURRENT AT PC2_OUT high-impedance OFF-state, (zero current) PC2_OUT/VCO_IN PCP_OUT mbd047 The pulse overlap of the up and down signals (typically 15 ns). Fig. 10. Timing diagram for PC2 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 9 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 2.75 2.75 VCO_IN 2.50 VCO_IN (1) 2.50 (1) (2) 2.25 - 25 0 phase error (ns) 2.25 - 25 25 0 phase error (ns) 001aak444 25 001aak445 (1) Due to parasitic capacitance on PC2_OUT. (2) Backlash time (dead zone). a. Response with traditional voltage-switch charge-pump PC2_OUT (74HCT4046A). b. Response with current switch charge-pump PC2_OUT as applied in the 74HCT9046A. Fig. 11. The response of a locked-loop in the vicinity of the zero crossing of the phase error The design of the low-pass filter is somewhat different when using current sources. The external resistor R3 is no longer present when using PC2 as phase comparator. The current source is set by Rbias. A simple capacitor behaves as an ideal integrator now, because the capacitor is charged by a constant current. The transfer function of the voltage switch charge pump may be used. In fact it is even more valid, because the transfer function is no longer restricted for small changes only. Further the current is independent from both the supply voltage and the voltage across the filter. For one that is familiar with the low-pass filter design of the 74HCT4046A a relation may show how Rbias relates with a fictive series resistance, called R3'. This relation can be derived by assuming first that a voltage controlled switch PC2 of the 74HCT4046A is connected to the filter capacitance C2 via this fictive R3' (see Fig. 8b). Then during the PC2 output pulse the charge current equals: With the initial voltage VC2(0) at: 0.5VCC = 2.5 V, As shown before the charge current of the current switch of the 74HCT9046A is: Hence: Using this equivalent resistance R3' for the filter design the voltage can now be expressed as a transfer function of PC2; assuming ripple (fr = fi) is suppressed, as: Again this illustrates the supply voltage independent behavior of PC2. 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 10 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 7.4. Loop filter component selection Examples of PC2 combined with a passive filter are shown in Fig. 14 and Fig. 15. Fig. 14 shows that PC2 with only a C2 filter behaves as a high-gain filter. For stability the damped version of Fig. 15 with series resistance R4 is preferred. Practical design values for Rbias are between 25 kΩ and 250 kΩ with R3' = 1.5 kΩ to 15 kΩ for the filter design. Higher values for R3' require lower values for the filter capacitance which is very advantageous at low values of the loop natural frequency ωn. A Icp F(jω) Icp 17 Rbias INPUT - 1/Aτ 1 OUTPUT C2 1/ Aτ 001aak449 a. Simple loop filter for PC2 without damping ω 1 001aak451 001aak450 b. Amplitude characteristic Fig. 12. c. Pole zero diagram Fig. 13. A = DC gain limit, due to leakage Fig. 14. Simple loop filter for PC2 without damping A Icp F(jω) Icp 17 Rbias INPUT R4 OUTPUT 1/ Aτ O - 1/ τ 2 m 1 C2 001aak446 a. Simple loop filter for PC2 with damping 1/ Aτ 1 1 / Aτ 2 ω 001aak447 b. Amplitude characteristic 001aak448 c. Pole zero diagram A = DC gain limit, due to leakage Fig. 15. Simple loop filter for PC2 with damping 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 11 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 8. Limiting values Table 3. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter VCC supply voltage IIK input clamping current IOK IO ICC Min Max -0.5 +7 V VI < -0.5 V or VI > VCC + 0.5 V - ±20 mA output clamping current VO < -0.5 V or VO > VCC + 0.5 V - ±20 mA output current -0.5 V < VO < VCC + 0.5 V - ±25 mA supply current - +50 mA IGND ground current -50 - mA Tstg storage temperature -65 +150 °C Ptot total power dissipation - 500 mW Min Typ Max Unit 4.5 5.0 5.5 V [1] Conditions Tamb = -40 °C to +125 °C [1] Unit For SOT109-1 (SO16) package: Ptot derates linearly with 12.4 mW/K above 110 °C. 9. Recommended operating conditions Table 4. Operating conditions Symbol Parameter Conditions VCC supply voltage VI input voltage 0 - VCC V VO output voltage 0 - VCC V Tamb ambient temperature +125 °C Δt/ΔV input transition rise and fall rate 139 ns/V -40 pin INH; VCC = 4.5 V - 1.67 10. Static characteristics Table 5. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Typ Max Unit Tamb = 25 °C Phase comparator section VIH HIGH-level input voltage pins SIG_IN and COMP_IN; VCC = 4.5 V; DC coupled 3.15 2.4 VIL LOW-level input voltage pins SIG_IN and COMP_IN; VCC = 4.5 V; DC coupled - 2.1 VOH HIGH-level output voltage pins PCP_OUT and PCn_OUT; VCC = 4.5 V; VI = VIH or VIL IO = -20 μA 4.4 4.5 - V IO = -4.0 mA 3.98 4.32 - V IO = 20 μA - 0 0.1 V IO = 4.0 mA - 0.15 - - VOL II LOW-level output voltage input leakage current 74HCT9046A Product data sheet - V 1.35 V pins PCP_OUT and PCn_OUT; VCC = 4.5 V; VI = VIH or VIL pins SIG_IN and COMP_IN; VCC = 5.5 V; VI = VCC or GND All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © 0.26 V ±30 μA Nexperia B.V. 2020. All rights reserved 12 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO Symbol Parameter Conditions Min Typ IOZ OFF-state output current RI Max Unit pin PC2_OUT; VCC = 5.5 V; VI = VIH or VIL; VO = VCC or GND - - input resistance SIG_IN and COMP_IN; VCC = 4.5 V; VI at self-bias operating point; ΔVI = 0.5 V; see Fig. 16, Fig. 17 and Fig. 18 - 250 - kΩ Rbias bias resistance VCC = 4.5 V 25 - 250 kΩ Icp charge pump current VCC = 4.5 V; Rbias = 40 kΩ ±0.5 μA ±0.53 ±1.06 ±2.12 mA VCO section VIH HIGH-level input voltage pin INH; VCC = 4.5 V to 5.5 V; DC coupled 2.0 1.6 - V VIL LOW-level input voltage pin INH; VCC = 4.5 V to 5.5 V; DC coupled - 1.2 0.8 V VOH HIGH-level output voltage pin VCO_OUT; VCC = 4.5 V; VI = VIH or VIL VOL LOW-level output voltage IO = -20 μA 4.4 4.5 - V IO = -4.0 mA 3.98 4.32 - V IO = 20 μA - 0 0.1 V IO = 4.0 mA - 0.15 0.26 V pins C1A and C1B; VCC = 4.5 V; VI = VIH or VIL; IO = 4.0 mA - - 0.40 V pin VCO_OUT; VCC = 4.5 V; VI = VIH or VIL II input leakage current pins INH and VCO_IN; VCC = 5.5 V; VI = VCC or GND - - ±0.1 μA R1 resistor 1 VCC = 4.5 V 3 - 300 kΩ R2 resistor 2 VCC = 4.5 V 3 - 300 kΩ C1 capacitor 1 VCC = 4.5 V 40 - no limit pF VVCO_IN voltage on pin VCO_IN over the range specified for R1 VCC = 4.5 V 1.1 - 3.4 V VCC = 5.0 V 1.1 - 3.9 V VCC = 5.5 V 1.1 - 4.4 V 50 - 300 kΩ Demodulator section Rs series resistance VCC = 4.5 V; at Rs > 300 kΩ the leakage current can influence VDEM_OUT Voffset offset voltage VCO_IN to VDEM_OUT; VCC = 4.5 V; VI = VVCO_IN = 0.5VCC; values taken over Rs range; see Fig. 19 - ±20 - mV Rdyn dynamic resistance DEM_OUT; VCC = 4.5 V; VDEM_OUT = 0.5 VCC - 25 - Ω ICC supply current disabled; VCC = 5.5 V; pin INH at VCC - - 8.0 μA ΔICC additional supply current pin INH; VI = VCC - 2.1 V; VCC = 4.5 V; other inputs at VCC or GND; - 100 360 μA CI input capacitance - 3.5 - pF General 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 13 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO Symbol Parameter Conditions Min Typ Max Unit Tamb = -40 °C to +85 °C Phase comparator section VIH HIGH-level input voltage pins SIG_IN and COMP_IN; VCC = 4.5 V; DC coupled 3.15 - VIL LOW-level input voltage pins SIG_IN and COMP_IN; VCC = 4.5 V; DC coupled - - VOH HIGH-level output voltage pins PCP_OUT and PCn_OUT; VCC = 4.5 V; VI = VIH or VIL IO = -20 μA 4.4 - - V IO = -4.0 mA 3.84 - - V IO = 20 μA - - 0.1 V IO = 4.0 mA - - 0.33 V VOL LOW-level output voltage - V 1.35 V pins PCP_OUT and PCn_OUT; VCC = 4.5 V; VI = VIH or VIL II input leakage current SIG_IN and COMP_IN; VCC = 5.5 V; VI = VCC or GND - - ±38 μA IOZ OFF-state output current PC2_OUT; VCC = 5.5 V; VI = VIH or VIL; VO = VCC or GND - - ±5.0 μA VCO section VIH HIGH-level input voltage pin INH; VCC = 4.5 V to 5.5 V; DC coupled 2.0 - - V VIL LOW-level input voltage pin INH; VCC = 4.5 V to 5.5 V; DC coupled - - 0.8 V VOH HIGH-level output voltage pin VCO_OUT; VCC = 4.5 V; VI = VIH or VIL IO = -20 μA 4.4 - - V IO = -4.0 mA 3.84 - - V IO = 20 μA - - 0.1 V IO = 4.0 mA - - 0.33 V pins C1A and C1B; VCC = 4.5 V; VI = VIH or VIL; IO = 4.0 mA - - 0.47 V input leakage current pins INH and VCO_IN; VCC = 5.5 V; VI = VCC or GND - - ±1.0 μA ICC supply current disabled; VCC = 5.5 V; pin INH at VCC - - 80.0 μA ΔICC additional supply current per input pin; VI = VCC - 2.1 V; VCC = 4.5 V; other inputs at VCC or GND; - - 450 VOL II LOW-level output voltage pin VCO_OUT; VCC = 4.5 V; VI = VIH or VIL General 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © μA Nexperia B.V. 2020. All rights reserved 14 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO Symbol Parameter Conditions Min Typ Max Unit Tamb = -40 °C to +125 °C Phase comparator section VIH HIGH-level input voltage pins SIG_IN and COMP_IN; VCC = 4.5 V; DC coupled 3.15 - VIL LOW-level input voltage pins SIG_IN and COMP_IN; VCC = 4.5 V; DC coupled - - VOH HIGH-level output voltage pins PCP_OUT and PCn_OUT; VCC = 4.5 V; VI = VIH or VIL IO = -20 μA 4.4 - - V IO = -4.0 mA 3.7 - - V IO = 20 μA - - 0.1 V IO = 4.0 mA - - 0.4 V ±45 μA VOL LOW-level output voltage - V 1.35 V pins PCP_OUT and PCn_OUT; VCC = 4.5 V; VI = VIH or VIL II input leakage current pins SIG_IN and COMP_IN; VCC = 5.5 V; VI = VCC or GND - - IOZ OFF-state output current pin PC2_OUT; VCC = 5.5 V; VI = VIH or VIL; VO = VCC or GND - - ±10.0 μA VCO section VIH HIGH-level input voltage pin INH; VCC = 4.5 V to 5.5 V; DC coupled 2.0 - - V VIL LOW-level input voltage pin INH; VCC = 4.5 V to 5.5 V; DC coupled - - 0.8 V VOH HIGH-level output voltage pin VCO_OUT; VCC = 4.5 V; VI = VIH or VIL IO = -20 μA 4.4 - - V IO = -4.0 mA 3.7 - - V IO = 20 μA - - 0.1 V IO = 4.0 mA - - 0.4 V pins C1A and C1B; VCC = 4.5 V; VI = VIH or VIL; IO = 4.0 mA - - 0.54 V input leakage current pins INH and VCO_IN; VCC = 5.5 V; VCC or GND - - ±1.0 μA ICC supply current disabled; VCC = 5.5 V; pin INH at VCC - - 160.0 μA ΔICC additional supply current per input pin; VI = VCC - 2.1 V; VCC = 4.5 V; other inputs at VCC or GND - - VOL II LOW-level output voltage pin VCO_OUT; VCC = 4.5 V; VI = VIH or VIL General 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © 490 μA Nexperia B.V. 2020. All rights reserved 15 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mbd108 II mga956 - 1 800 RI (kΩ) ΔVI 600 400 VCC = 4.5 V 200 self-bias operating point 5.5 V 0 (0.5 VCC) - 0.25 VI Fig. 16. Typical input resistance curve at SIG_IN and COMP_IN 0.5 VCC VI (V) (0.5 VCC) + 0.25 Fig. 17. Input resistance at SIG_IN; COMP_IN with ΔVI = 0.5 V at self-bias point mga958 60 Voffset mga957 5 4.5 V II (µA) (mV) 40 VCC = 5.5V 20 VCC = 4.5 V 0 0 - 20 5.5 V 4.5 V 5.5 V -5 (0.5 VCC) - 0.25 - 40 (0.5 VCC) - 2 0.5 VCC VI (V) (0.5 VCC) + 0.25 Fig. 18. Input current at SIG_IN; COMP_IN with ΔVI = 0.5 V at self-bias point 74HCT9046A Product data sheet 0.5 VCC (0.5 VCC) + 2 VVCO_IN (V) ___ Rs = 50 kΩ - - - Rs = 300 kΩ Fig. 19. Offset voltage at demodulator output as a function of VCO_IN and Rs All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 16 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 11. Dynamic characteristics Table 6. Dynamic characteristics GND = 0 V; tr = tf = 6 ns; CL = 50 pF. [1] Symbol Parameter Min Typ SIG_IN, COMP_IN to PC1_OUT; VCC = 4.5 V; see Fig. 20 - 23 40 ns SIG_IN, COMP_IN to PCP_OUT; VCC = 4.5 V; see Fig. 20 - 35 68 ns Conditions Max Unit Tamb = 25 °C Phase comparator section tpd propagation delay ten enable time SIG_IN, COMP_IN to PC2_OUT; VCC = 4.5 V; see Fig. 21 - 30 56 ns tdis disable time SIG_IN, COMP_IN to PC2_OUT; VCC = 4.5 V; see Fig. 21 - 36 65 ns tt transition time VCC = 4.5 V; see Fig. 20 - 7 15 ns Vi(p-p) peak-to-peak input voltage pin SIGN_IN or COMP_IN; VCC = 4.5 V; AC coupled; fi = 1 MHz [2] - 50 - mV [3] -10 - +10 11.0 15.0 - MHz - 16.0 - MHz - 0.4 - % - 50 - % - 20 - pF SIG_IN, COMP_IN to PC1_OUT; VCC = 4.5 V; see Fig. 20 - - 50 ns SIG_IN, COMP_IN to PCP_OUT; VCC = 4.5 V; see Fig. 20 - - 85 ns VCO section Δf frequency deviation VCC = 5.0 V; VVCO_IN = 3.9 V; R1 = 10 kΩ; R2 = 10 kΩ; C1 = 1 nF f0 center frequency VCC = 4.5 V; duty cycle = 50 %; VVCO_IN = 0.5VCC; R1 = 4.3 kΩ; R2 = ∞ Ω; C1 = 40 pF; see Fig. 25 and Fig. 33 VCC = 5 V; duty cycle = 50 %; VVCO_IN = 0.5VCC; R1 = 3 kΩ; R2 = ∞ Ω; C1 = 40 pF; see Fig. 25 and Fig. 33 Δf/f relative frequency variation VCC = 4.5 V; R1 = 100 kΩ; R2 = ∞ Ω; C1 = 100 pF; see Fig. 26 and Fig. 27 δ duty cycle VCO_OUT; VCC = 4.5 V [4] % General CPD power dissipation capacitance [5][6] Tamb = -40 °C to +85 °C Phase comparator section tpd propagation delay ten enable time SIG_IN, COMP_IN to PC2_OUT; VCC = 4.5 V; see Fig. 21 - - 70 ns tdis disable time SIG_IN, COMP_IN to PC2_OUT; VCC = 4.5 V; see Fig. 21 - - 81 ns tt transition time VCC = 4.5 V; see Fig. 20 - - 19 ns - 0.06 - VCO section Δf/ΔT frequency variation with temperature 74HCT9046A Product data sheet VCC = 4.5 V; VVCO_IN = 0.5VCC; recommended range: R1 = 10 kΩ; R2 = 10 kΩ; C1 = 1 nF; see Fig. 22, Fig. 23 and Fig. 24 All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 [7] © %/K Nexperia B.V. 2020. All rights reserved 17 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO Symbol Parameter Min Typ SIG_IN, COMP_IN to PC1_OUT; VCC = 4.5 V; see Fig. 20 - - 60 ns SIG_IN, COMP_IN to PCP_OUT; VCC = 4.5 V; see Fig. 20 - - 102 ns Conditions Max Unit Tamb = -40 °C to +125 °C Phase comparator section tpd propagation delay ten enable time SIG_IN, COMP_IN to PC2_OUT; VCC = 4.5 V; see Fig. 21 - - 84 ns tdis disable time SIG_IN, COMP_IN to PC2_OUT; VCC = 4.5 V; see Fig. 21 - - 98 ns tt transition time VCC = 4.5 V; see Fig. 20 - - 22 ns [1] [2] [3] [4] [5] [6] [7] tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH; tt is the same as tTLH and tTHL. This is the (peak to peak) input sensitivity. This is the center frequency tolerance. This is the frequency linearity. CPD is used to determine the dynamic power dissipation (PD in μW). 2 2 PD = CPD x VCC x fi x N + ∑(CL x VCC x fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VCC = supply voltage in V; N = total load switching outputs; 2 ∑(CL x VCC x fo) = sum of outputs. Applies to the phase comparator section only (pin INH = HIGH). For power dissipation of the VCO and demodulator sections, see Fig. 28, Fig. 29 and Fig. 30. This is the frequency stability with temperature change. SIG_IN, COMP_IN inputs VM tPHL PCP_OUT, PC1_OUT outputs tPLH VM tTHL tTLH mbd106 VM = 0.5VCC; VI = GND to VCC. Fig. 20. Waveforms showing input (SIG_IN and COMP_IN) to output (PCP_OUT and PC1_OUT) propagation delays and the output transition times 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 18 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO SIG_IN input VM COMP_IN input VM tPHZ tPZH tPLZ tPZL 90% PC2_OUT output VM 10% mga941 VM = 0.5VCC; VI = GND to VCC. Fig. 21. Waveforms showing the enable and disable times for PC2_OUT mbd115 20 Δf (%) Δf (%) mbd116 15 10 10 5 0 0 VCC = - 10 -5 5.5 V VCC = 5.5 V - 10 4.5 V 4.5 V - 20 - 50 0 50 100 150 Tamb (°C) a. R1 = 3 kΩ; R2 = ∞ Ω; C1 = 100 pF. - 15 - 50 0 50 100 150 Tamb (°C) b. R1 = 10 kΩ; R2 = ∞ Ω; C1 = 100 pF. Fig. 22. Frequency stability of the VCO as a function of ambient temperature with supply voltage as a parameter 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 19 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mbd124 10 VCC = Δf (%) 5.5 V Δf (%) 4.5 V mbd117 15 10 5 5 VCC = 0 0 5.5 V -5 - 10 -5 - 15 - 10 - 50 0 50 100 150 Tamb (°C) - 20 - 50 a. R1 = 300 kΩ; R2 = ∞ Ω; C1 = 100 pF. 4.5 V 0 50 100 150 Tamb (°C) b. R1 = ∞ Ω; R2 = 3 kΩ; C1 = 100 pF. Fig. 23. Frequency stability of the VCO as a function of ambient temperature with supply voltage as a parameter mbd118 8 Δf (%) mbd119 10 Δf (%) 4 5 0 0 VCC = -4 VCC = 5.5 V -8 - 12 - 50 4.5 V -5 5.5 V 4.5 V 0 50 100 150 Tamb (°C) a. R1 = ∞ Ω; R2 = 10 kΩ; C1 = 100 pF. - 10 - 50 0 50 100 150 Tamb (°C) b. R1 = ∞ Ω; R2 = 300 kΩ; C1 = 100 pF. Fig. 24. Frequency stability of the VCO as a function of ambient temperature with supply voltage as a parameter 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 20 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mbd112 30 mbd113 30 fVCO fVCO (MHz) (kHz) 20 VCC = 4.5 V 20 5.5 V VCC = 4.5 V 10 10 5.5 V 0 0 2 4 VVCO_IN (V) 0 6 a. R1 = 4.3 kΩ; C1 = 39 pF. mbd120 fVCO 4 VCO VCC = 5.5 V 300 4.5 V frequency 4.5 V frequency 400 200 200 100 0 2 6 mbd111 (Hz) VCC = 5.5 V 0 VVCO_IN (V) 400 f 600 2 b. R1 = 4.3 kΩ; C1 = 100 nF. 800 (kHz) 0 4 c. R1 = 300 kΩ; C1 = 39 pF. VVCO_IN (V) 6 0 0 2 4 VVCO_IN (V) 6 d. R1 = 300 kΩ; C1 = 100 nF. Fig. 25. Graphs showing VCO frequency as a function of the VCO input voltage (VVCO_IN) 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 21 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mga937 f (MHz) mbd114 4 C1 = 1 µF 4.5 V 5.5 V fVCO (%) f2 f0 f'0 C1 = 39 pF 0 4.5 V f1 V min -4 V max 0.5 VCC 5.5 V VVCO_IN (V) -8 linearity = 1 10 10 2 R1 (kΩ) 10 3 R2 = ∞ Ω and ΔV = 0.5 V Fig. 26. Definition of VCO frequency linearity: ΔV = 0.5 V Fig. 27. Frequency linearity as a function of R1, C1 and over the VCC range VCC mbd121 1 VCC = PD 5.5 V C1 = 39 pF (W) 4.5 V C1 = 1 µF 10 1 VCC = PD 5.5 V C1 = 1 µF (W) mbd110 1 10 4.5 V C1 = 39 pF 1 5.5 V C1 = 39 pF 5.5 V 4.5 V C1 = 1 µF 4.5 V C1 = 39 pF 10 2 0 100 200 R1 (kΩ) 300 R2 = ∞ Ω Product data sheet 2 0 100 200 R2 (kΩ) 300 R1 = ∞ Ω Fig. 28. Power dissipation as a function of R1 74HCT9046A 10 Fig. 29. Power dissipation as a function of R2 All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 22 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mbd109 10 3 PDEM (W) VCC = 4.5 V 5.5 V 10 4 10 5 10 102 Rs (kΩ) 10 3 Fig. 30. Typical power dissipation as a function of Rs 12. Application information This information is a guide for the approximation of values of external components to be used with the 74HCT9046A in a phase-locked-loop system. Values of the selected components should be within the ranges shown in Table 7. Table 7. Survey of components Component Value R1 between 3 kΩ and 300 kΩ R2 between 3 kΩ and 300 kΩ R1 + R2 parallel value > 2.7 kΩ C1 > 40 pF Table 8. Design considerations for VCO section Subject Phase comparator Design consideration VCO frequency without extra offset VCO frequency with extra offset PLL conditions with no signal at pin SIG_IN 74HCT9046A Product data sheet PC1, PC2 VCO frequency characteristic. With R2 = ∞ and R1 within the range 3 kΩ < R1 < 300 kΩ, the characteristics of the VCO operation will be as shown in Fig. 31a. (Due to R1, C1 time constant a small offset remains when R2 = ∞ Ω). PC1 Selection of R1 and C1. Given f0, determine the values of R1 and C1 using Fig. 33. PC2 Given fmax and f0 determine the values of R1 and C1 using Fig. 33; use Fig. 35 to obtain 2fL and then use this to calculate fmin. PC1, PC2 VCO frequency characteristic. With R1 and R2 within the ranges 3 kΩ < R1 < 300 kΩ; 3 kΩ < R2 < 300 kΩ, the characteristics of the VCO operation is as shown in Fig. 31b. PC1, PC2 Selection of R1, R2 and C1. Given f0 and fL determine the value of product R1C1 by using Fig. 35. Calculate foff from the equation foff = f0 - 1.6fL. Obtain the values of C1 and R2 by using Fig. 34. Calculate the value of R1 from the value of C1 and the product R1C1. PC1 VCO adjusts to f0 with ΦPC_IN = 90° and VVCO_IN = 0.5VCC PC2 VCO adjusts to foffset with ΦPC_IN = -360° and VVCO_IN = minimum All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 23 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mga938 f VCO f max f0 2f L due to R1,C1 f min 1.1 V 0.5 VCC VCC- 1.1 V VCC VCO_IN a. Operating without offset; f0 = center frequency; 2fL = frequency lock range. mga939 f VCO f max f0 due to R1,C1 2fL f min f off 0.6fL due to R2,C1 1.1 V 0.5 VCC VCC- 1.1 V VCC VCO_IN b. Operating with offset; f0 = center frequency; 2fL = frequency lock range. Fig. 31. Frequency characteristic of VCO 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 24 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 12.1. Filter design considerations for PC1 and PC2 of the 74HCT9046A Fig. 32 shows some examples of passive and active filters to be used with the phase comparators of the 74HCT9046A. Transfer functions of phase comparators and filters are given in Table 9. Table 9. Transfer functions of phase comparators and filters Phase Explanation Figure Filter type comparator PC1 = R3 x C2; = R4 x C2; = R4 x C3; 5 A = 10 = DC gain amplitude PC2 Fig. 32a passive filter without damping Fig. 32b passive filter with damping Fig. 32c active filter with damping Fig. 32d passive filter with damping = R3’ x C2; = R4 x C2; Fig. 32e = R4 x C3; R3' = Rbias/17; Rbias = 25 kΩ to 250 kΩ Transfer function 5 A = 10 = DC gain amplitude active filter with damping 5 A = 10 = DC gain amplitude Table 10. General design considerations Subject Phase comparator Design consideration PLL locks on harmonics at center frequency PC1 yes PC2 no Noise rejection at signal input PC1 high PC2 low PC1 fr = 2fi; large ripple content at ΦPC_IN = 90° PC2 fr = fi; small ripple content at ΦPC_IN = 0° AC ripple content when PLL is locked 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 25 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO PC1 AMPLITUDE CHARACTERISTIC CIRCUIT POLE ZERO DIAGRAM F (jω) R3 X 1/ τ 1/ τ 1 C2 1 (a) F (jω) R3 1/ τ 2 C3 1/ τ 3 O 1/ τ 2 R4 1/ τ 1 τ 2 C2 X 1 τ1 τ2 (b) A C3 1/ τ 2 C2 R4 R3 1/ τ 3 1/ A τ 1 A O 1/ τ 2 X 1/ A τ 1 O 1/ τ 2 X 1/ A τ 1 O 1/ τ 2 X 1/ A τ 1 (c) PC2 A R3' 1/ τ 2 1/ τ 3 R4 AR3' 1/A τ 1 C2 (d) A C3 1/ τ 2 C2 R4 R3' A 1/ τ 3 1/A τ 1 (e) mbd107 Fig. 32. Passive and active filters for 74HCT9046A 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 26 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mbd103 108 f0 (Hz) 107 106 105 104 (1) (2) (3) (4) (5) (6) (7) (8) 103 102 10 1 10 102 103 104 105 106 107 C1 (pF) (1) VCC = 5.5 V; R1 = 3 kΩ. (2) VCC = 4.5 V; R1 = 3 kΩ. (3) VCC = 5.5 V; R1 = 10 kΩ. (4) VCC = 4.5 V; R1 = 10 kΩ. (5) VCC = 5.5 V; R1 = 150 kΩ. (6) VCC = 4.5 V; R1 = 150 kΩ. (7) VCC = 5.5 V; R1 = 300 kΩ. (8) VCC = 4.5 V; R1 = 300 kΩ. R2 = ∞ Ω; VVCO_IN = 0.5VCC; INH = GND; Tamb = 25 °C. Fig. 33. Typical value of VCO center frequency (f0) as a function of C1 foff (Hz) mbd104 108 107 106 105 104 (1) 103 (2) 102 10 (3) (4) 1 10 102 103 104 105 106 107 C1 (pF) (1) VCC = 4.5 V to 5.5 V; R2 = 3 kΩ. (2) VCC = 4.5 V to 5.5 V; R2 = 10 kΩ. (3) VCC = 4.5 V to 5.5 V; R2 = 150 kΩ. (4) VCC = 4.5 V to 5.5 V; R2 = 300 kΩ. R1 = ∞ Ω; VVCO_IN = 0.5VCC; INH = GND; Tamb = 25 °C. Fig. 34. Typical value of frequency offset as a function of C1 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 27 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 2fL (Hz) mbd105 108 107 106 105 104 103 VCC = 102 10 10- 7 5.5 V 4.5 V 10- 6 10- 5 10- 4 10- 3 10- 2 10- 1 1 R1C1 (s) VVCO_IN = 1.1 V to (VCC - 1.1) V Fig. 35. Typical frequency lock range 2fL as a function of the product R1 and C1 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 28 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 12.2. PLL design example The frequency synthesizer used in the design example shown in Fig. 36 has the following parameters: • • • • Output frequency: 2 MHz to 3 MHz Frequency steps: 100 kHz Settling time: 1 ms Overshoot: < 20 % The open loop gain is: and the closed loop: where: • • • • Kp = phase comparator gain Kf = low-pass filter transfer gain Ko = Kv/s VCO gain 1 Kn = ⁄n divider ratio The programmable counter ratio Kn can be found as follows: The VCO is set by the values of R1, R2 and C1; R2 = 10 kΩ (adjustable). The values can be determined using the information in Table 8. With f0 = 2.5 MHz and fL = 500 kHz this gives the following values (VCC = 5.0 V): • • • R1 = 30 kΩ R2 = 30 kΩ C1 = 100 pF The VCO gain is: The gain of the phase comparator PC2 is: Using PC2 with the passive filter as shown in Fig. 36 results in a high gain loop with the same performance as a loop with an active filter. Hence loop filter equations as for a high gain loop should be used. The current source output of PC2 can be simulated then with a fictive filter resistance: 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 29 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO The transfer functions of the filter is given by: Where: The characteristic equation is: This results in: or: This can be written as: with the natural frequency ωn defined as: and the damping value given as: In Fig. 37 the output frequency response to a step of input frequency is shown. The overshoot and settling time percentages are now used to determine ωn. From Fig. 37 it can be seen that the damping ratio ζ = 0.707 will produce an overshoot of less than 20 % and settle to within 5 % at ωnt = 5. The required settling time is 1 ms. This results in: Rewriting the equation for natural frequency results in: 1 The maximum overshoot occurs at Nmax = 30; hence Kn = ⁄30: When C2 = 470 nF, it follows: Hence the current source bias resistance With ζ = 0.707 (0.5 x × ωn) it follows: For extra ripple suppression a capacitor C3 can be connected in parallel with R4, with an extra = R4 x C3. For stability reasons 74HCT9046A Product data sheet should be < 0.1 , hence C3 < 0.1C2 or C3 = 39 nF. All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 30 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO Kp OSCILLATOR "HCU04" DIVIDE BY 10 "190" 100 kHz 14 3 Kf PHASE COMPARATOR PC2 R3' 13 Φu 9 4 VCO (1) 15 R4 C3 Rbias Kn 1 MHz Ko C2 11 R1 12 6 7 fOUT 5 R2 C1 PROGRAMMABLE DIVIDER "4059" mbd098 (1) R3'= fictive resistance R3’ = C1 = 100 pF C2 = 470 nF C3 = 39 nF R1 = 30 kΩ R2 = 30 kΩ R3' = 2 550 Ω Rbias = 43 kΩ R4 = 600 Ω Fig. 36. Frequency synthesizer mga959 1.6 Δωe(t) Δωe/ωn ζ = 0.3 1.4 - 0.4 0.5 0.707 1.0 1.2 - 0.6 - 0.2 ΔΦe(t) ΔΦe/ωn ζ = 5.0 1.0 0 ζ = 2.0 0.8 0.2 0.6 0.4 0.4 0.6 0.2 0.8 0 0 1 2 3 4 5 6 7 ωnt 8 1.0 Fig. 37. Type 2, second order frequency step response 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 31 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO mga952 3.1 N = 30 proportional to output frequency (MHz) N stepped from 29 to 30 2.9 step input 2.1 N stepped from 21 to 20 2.0 1.9 0 0.5 1.0 1.5 2.0 2.5 time (ms) Fig. 38. Frequency compared to the time response Since the output frequency is proportional to the VCO control voltage, the PLL frequency response can be observed with an oscilloscope by monitoring pin VCO_IN of the VCO. The average frequency response, as calculated by the Laplace method, is found experimentally by smoothing this voltage at pin VCO_IN with a simple RC filter, whose time constant is long compared with the phase detector sampling rate but short compared with the PLL response time. 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 32 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 13. Package outline SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 D E A X c y HE v M A Z 16 9 Q A2 A (A 3) A1 pin 1 index θ Lp 1 L 8 e w M bp 0 2.5 detail X 5 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 10.0 9.8 4.0 3.8 1.27 6.2 5.8 1.05 1.0 0.4 0.7 0.6 0.25 0.25 0.1 0.7 0.3 inches 0.069 0.010 0.057 0.004 0.049 0.01 0.019 0.0100 0.39 0.014 0.0075 0.38 0.16 0.15 0.05 0.039 0.016 0.028 0.020 0.01 0.01 0.004 0.028 0.012 0.244 0.041 0.228 θ o 8 o 0 Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT109-1 076E07 MS-012 JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-19 Fig. 39. Package outline SOT109-1 (SO16) 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 33 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 14. Abbreviations Table 11. Abbreviations Acronym Description CMOS Complementary Metal Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model MM Machine Model PLL Phase Locked Loop TTL Transistor-Transistor Logic VCO Voltage Controlled Oscillator 15. Revision history Table 12. Revision history Document ID Release date Data sheet status Change notice Supersedes 74HCT9046A v.9 20190320 Product data sheet - 74HCT9046A v.8 Modifications: • 74HCT9046A v.8 20190131 - 74HCT9046A v.7 Modifications: • • • Fig. 34: typo corrected in the conditions The format of this data sheet has been redesigned to comply with the identity guidelines of Nexperia. Legal texts have been adapted to the new company name where appropriate. Type number 74HCT9046APW (SOT403-1/TSSOP16) removed. 74HCT9046A v.7 20160229 Modifications: • 74HCT9046A v.6 20090915 Modifications: • • • • • Product data sheet Product data sheet - 74HCT9046A v.6 Type number 74HCT9046AN (SOT38-4) removed. Product data sheet - 74HCT9046A v.5 The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. Legal texts have been adapted to the new company name where appropriate. Vi(p-p) value changed from 15 mV to 50 mV in Section 11. Δf/ΔT value moved from minimum to typical column Section 11. Package version SOT38-1 changed to SOT38-4. 74HCT9046A v.5 20031030 Product specification - 74HCT9046A v.4 74HCT9046A v.4 20030515 Product specification - 74HCT9046A v.3 74HCT9046A v.3 19990111 Product specification - - 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 34 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO 16. Legal information injury, death or severe property or environmental damage. Nexperia and its suppliers accept no liability for inclusion and/or use of Nexperia products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Data sheet status Quick reference data — The Quick reference data is an extract of the product data given in the Limiting values and Characteristics sections of this document, and as such is not complete, exhaustive or legally binding. Document status [1][2] Product status [3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] [2] [3] Please consult the most recently issued document before initiating or completing a design. The term 'short data sheet' is explained in section "Definitions". The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the internet at https://www.nexperia.com. Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. Nexperia does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local Nexperia sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification — The information and data provided in a Product data sheet shall define the specification of the product as agreed between Nexperia and its customer, unless Nexperia and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the Nexperia product is deemed to offer functions and qualities beyond those described in the Product data sheet. Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, Nexperia does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. Nexperia takes no responsibility for the content in this document if provided by an information source outside of Nexperia. In no event shall Nexperia be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. 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Suitability for use — Nexperia products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an Nexperia product can reasonably be expected to result in personal 74HCT9046A Product data sheet Applications — Applications that are described herein for any of these products are for illustrative purposes only. Nexperia makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using Nexperia products, and Nexperia accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the Nexperia product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. Nexperia does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using Nexperia products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). Nexperia does not accept any liability in this respect. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale — Nexperia products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nexperia.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. Nexperia hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of Nexperia products by customer. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Non-automotive qualified products — Unless this data sheet expressly states that this specific Nexperia product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. Nexperia accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without Nexperia’s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond Nexperia’s specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies Nexperia for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond Nexperia’s standard warranty and Nexperia’s product specifications. Translations — A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 35 / 36 74HCT9046A Nexperia PLL with band gap controlled VCO Contents 1. General description...................................................... 1 2. Features and benefits.................................................. 1 3. Applications.................................................................. 1 4. Ordering information....................................................1 5. Functional diagram.......................................................2 6. Pinning information......................................................4 6.1. Pinning.........................................................................4 6.2. Pin description............................................................. 4 7. Functional description................................................. 5 7.1. Differences with respect to the familiar 74HCT4046A..5 7.2. VCO............................................................................. 5 7.3. Phase comparators......................................................6 7.3.1. Phase Comparator 1 (PC1)...................................... 6 7.3.2. Phase Comparator 2 (PC2)...................................... 7 7.4. Loop filter component selection................................. 11 8. Limiting values........................................................... 12 9. Recommended operating conditions........................12 10. Static characteristics................................................12 11. Dynamic characteristics...........................................17 12. Application information........................................... 23 12.1. Filter design considerations for PC1 and PC2 of the 74HCT9046A............................................................... 25 12.2. PLL design example................................................ 29 13. Package outline........................................................ 33 14. Abbreviations............................................................ 34 15. Revision history........................................................34 16. Legal information......................................................35 © Nexperia B.V. 2020. All rights reserved For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com Date of release: 20 March 2020 74HCT9046A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 9 — 20 March 2020 © Nexperia B.V. 2020. All rights reserved 36 / 36