VCA2619YT

VCA2619 SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 Dual, Variable Gain Amplifier with Input Buffer FEATURES DESCRIPTION D GAIN RANGE: 50dB D LOW CROSSTALK: -60dB at Max Gain, The VCA2619 is a highly integrated, dual receive channel, Variable Gain Amplifier (VGA) with analog gain control. fIN = 5MHz D HIGH−SPEED VARIABLE GAIN ADJUST D POWER SHUTDOWN MODE D HIGH IMPEDANCE INPUT BUFFER APPLICATIONS D D D D ULTRASOUND SYSTEMS WIRELESS RECEIVERS TEST EQUIPMENT RADAR The VCA2619s VGA section consists of two parts: the Voltage Controlled Attenuator (VCA) and the Programmable Gain Amplifier (PGA). The gain and gain range of the PGA can be digitally programmed. The combination of these two programmable elements results in a variable gain ranging from 0dB up to a maximum gain as defined by the user through external connections. The single−ended unity gain input buffer provides predictable high input impedance. The output of the VGA can be used in either a single−ended or differential mode to drive high−performance Analog−to− Digital (A/D) converters. A separate power−down pin reduces power consumption. The VCA2619 also features low crosstalk and outstanding distortion performance. The combination of low noise and gain range programmability make the VCA2619 a versatile building block in a number of applications where noise performance is critical. The VCA2619 is available in a TQFP−32 package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. Copyright  2003, Texas Instruments Incorporated
          
             
 !     !    www.ti.com " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 ABSOLUTE MAXIMUM RATINGS(1) Power Supply (+VS) +6V Analog Input −0.3V to (+VS + 0.3V) Logic Input −0.3V to (+VS + 0.3V) Case Temperature +100°C Junction Temperature +150°C Storage Temperature −40°C to +150°C (1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability. This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR(1) SPECIFIED TEMPERATURE RANGE PACKAGE MARKING VCA2619Y TQFP−32 PBS −40°C to +85°C VCA2619Y ORDERING NUMBER (1) For the most current specification and package information, refer to our web site at www.ti.com. 2 TRANSPORT MEDIA, QUANTITY VCA2619YT Tape and Reel, 250 VCA2619YR Tape and Reel, 2000 " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 ELECTRICAL CHARACTERISTICS At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground single−ended output (1Vpp), MGS = 111, VCACNTL = 2.9V and fIN = 5MHz, unless otherwise noted. VCA2619 PARAMETER CONDITIONS MIN TYP MAX UNIT BUFFER Input Resistance 600 kΩ Input Capacitance 5 pF Input Bias Current 1 nA 1 5.9 350 13 100 Vpp nV/√Hz fA/√Hz dB MHz Maximum Input Voltage Input Voltage Noise Input Current Noise Noise Figure Bandwidth PGA Gain = 45dB, RS = 50Ω Independent of Gain RF = 550Ω, PGA Gain = 45dB, RS = 75Ω PROGRAMMABLE VARIABLE GAIN AMPLIFIER Peak Input Voltage 1 Vpp −3dB Bandwidth 20 MHz 300 V/µs Slew Rate Output Signal Range RL ≥ 500Ω Each Side to Ground Output Impedance 2nd-Harmonic Distortion VOUT = 1Vpp, VCACNTL = 2.9V VOUT = 1Vpp, VCACNTL = 2.9V 2nd-Harmonic Distortion Differential, VOUT = 2Vpp, VCACNTL = 3.0V, MGS = 011 Overload Performance (2nd-Harmonic Distortion) Input Signal = 0.5Vpp, VCACNTL = 2V Crosstalk Ω ±40 mA −60 dBc −42 −50 dBc −50 dBc −40 to −45 dB Time Delay IMD, 2−Tone V 1 −45 Output Short−Circuit Current 3rd-Harmonic Distortion 2.5 ±1 VOUT = 2Vpp, f = 9.95MHz 2Vpp Differential 5 ns −59 dBc −60 dB 20 ±2.75 ±1.50 ±50 52 50 dB/V dB dB mV dB dB ACCURACY Gain Slope Gain Error(1) Output Offset Voltage Gain Range VCACNTL = 0.4V to 2.9V VCACNTL = 0.2V to 3.0V VCACNTL = 0.4V to 2.9V VCACNTL = 0.2V to 3.0V VCACNTL = 0.4V to 2.9V 48 ±2.0 GAIN CONTROL INTERFACE Input Voltage (VCACNTL) Range Input Resistance Response Time 45dB Gain Change 0 to 3.0 V 1 0.2 MΩ µs POWER SUPPLY Specified Operating Range Power Dissipation Power−Down 4.75 5.0 240 9.2 5.25 300 V mW mW (1) Referenced to best fit dB−linear curve. 3 " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 NC NC CP2A CP1A VDDA GNDA POUTA NOUTA 32 31 30 29 28 27 26 25 PIN CONFIGURATION +INA 1 24 VCACNTL NC 2 23 MGS3 VDDR 3 22 MGS2 VBIAS 4 21 MGS1 VCM 5 20 PD GNDR 6 19 NC NC 7 18 NC +INB 8 17 DNC 9 10 11 12 13 14 15 16 NC NC CP2B CP1B VDDB GNDB POUTB NOUTB VCA2619 PIN CONFIGURATION 4 PIN DESIGNATOR 1 Noninverting Input Channel A 17 DNC Do Not Connect 2 +INA NC DESCRIPTION PIN DESIGNATOR DESCRIPTION No Internal Connection 18 NC No Internal Connection 3 VDDR Internal Reference Supply 19 NC No Internal Connection 4 VBIAS Bias Voltage 20 PD Power-Down (Active LOW) 5 VCM Common−Mode Voltage 23 MGS1 Maximum Gain Select 1 (MSB) 6 GNDR Internal Reference Ground 22 MGS2 Maximum Gain Select 2 7 NC No Internal Connection 23 MGS3 Maximum Gain Select 3 (LSB) 8 +INB Noninverting Input Channel B 24 VCACNTL VCA Analog Control 9 NC No Internal Connection 25 NOUTA Negative VCA Output Channel A 10 NC No Internal Connection 26 POUTA Positive VCA Output Channel A 11 CP2B Coupling Capacitor Channel B 27 GNDA Ground Channel A 12 CP1B Coupling Capacitor Channel B 28 VDDA +5V Supply Channel A 13 VDDB +5V Supply Channel B 29 CP1A Coupling Capacitor Channel A 14 GNDB Ground Channel B 30 CP2A Coupling Capacitor Channel A 15 POUTB Positive Output Channel B 31 NC No Internal Connection 16 NOUTB Negative Output Channel B 32 NC No Internal Connection " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 TYPICAL CHARACTERISTICS At TA = 25°C and VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2VPP) MGS = 111, and fIN = 5MHz, unless otherwise noted. GAIN ERROR vs TEMPERATURE 3.0 MGS = 111 2.5 MGS = 110 2.0 MGS = 101 +85_C 1.5 MGS = 010 MGS = 011 Gain Error (dB) Gain (dB) GAIN vs VCA 46 42 38 34 30 26 22 18 14 10 6 2 −2 −6 −10 −14 MGS = 100 +25_ C 1.0 0.5 0 −0.5 −1.0 −1.5 −2.0 −40_C −2.5 −3.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 VCACNTL (V) VCACNTL (V) GAIN ERROR vs VCACNTL GAIN ERROR vs VCACNTL 3.0 3.0 2.5 2.5 2.0 2.0 10MHz 0 −0.5 −1.0 5MHz 1MHz −1.5 1.0 0.5 MGS = 100 0 −0.5 −1.0 MGS = 111 −1.5 −2.0 −2.0 −2.5 −2.5 −3.0 −3.0 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 0.4 0.8 0.7 1.0 0.9 1.2 1.1 1.4 1.3 1.6 1.5 1.8 1.7 2.0 1.9 2.2 2.1 2.4 2.3 2.6 2.5 2.8 2.7 2.9 VCACNTL (V) GAIN MATCH: CHA to CHB, VCAC NTL = 0.4V GAIN MATCH: CHA to CHB, VCAC NT L = 2.9V 45 40 40 35 35 30 30 25 25 Units 45 20 0.6 0.5 VCACNTL (V) 20 15 10 10 5 5 0 0 −0.16 −0.14 −0.13 −0.11 −0.09 −0.08 −0.06 −0.04 −0.03 −0.01 0.01 0.02 0.04 0.06 0.07 0.09 0.11 0.12 0.14 More 15 −0.99 −0.91 −0.83 −0.75 −0.67 −0.59 −0.51 −0.42 −0.34 −0.26 −0.18 −0.10 −0.02 0.06 0.14 0.22 0.30 0.38 0.47 More Units MGS = 010 1.5 1.0 0.5 Gain Error (dB) Gain Error (dB) 1.5 Delta Gain (dB) Delta Gain (dB) 5 " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 TYPICAL CHARACTERISTICS (continued) At TA = 25°C and VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2VPP) MGS = 111, and fIN = 5MHz, unless otherwise noted. GAIN vs FREQUENCY (VCACNTL = 2.9V) GAIN vs FREQUENCY (MGS = 111) 50 50 VCACNTL = 2.9V MGS = 111 45 40 MGS = 100 40 30 30 Gain (dB) Gain (dB) 35 25 20 20 15 0 MGS = 010 10 VCACNTL = 1.9V 10 VCACNTL = 0.9V −10 5 0 100k 1M 10M −20 100k 100M 1M Frequency (MHz) RS= 50Ω 900 MGS = 111 Noise (nV/√Hz) Noise (nV/√Hz) 800 700 600 500 MGS = 100 400 300 200 100 0 RS = 50Ω MGS = 111 MGS = 100 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VCACNTL (V) VCACNTL (V) NOISE FIGURE vs RS INPUT REFERRED NOISE vs RS Noise Figure (dB) Noise (nV√Hz) 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 100 10 1 1 10 100 RS (Ω ) 6 100M INPUT REFERRED NOISE vs VCACNTL OUTPUT REFERRED NOISE vs VCACNTL 1100 1000 10M Frequency (MHz) 1k 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 10 100 RS (Ω) 1k " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 TYPICAL CHARACTERISTICS (continued) NOISE FIGURE vs VCACNTL 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 −30 −35 Harmonic Distortion (dBc) Noise Figure (dB) At TA = 25°C and VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2VPP) MGS = 111, and fIN = 5MHz, unless otherwise noted. −40 HARMONIC DISTORTION vs FREQUENCY (Differential, 2VPP, MGS = 010) VCA CN TL = 0.9V, H2 VCA CN TL = 0.9V, H3 VCA CN TL = 2.9V, H2 VCA CN TL = 2.9V, H3 −45 −50 −55 −60 −65 −70 100k 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VCACNTL (V) 1M 10M Frequency (Hz) −30 −35 −40 −35 −45 −50 −55 −60 −65 −70 −75 VCA CN T L = 0.9V, H2 −80 −85 VCA CN T L = 0.9V, H3 VCA CN T L = 2.9V, H2 VCA CN T L = 2.9V, H3 −90 100k 1M Harmonic Distortion (dBc) Harmonic Distortion (dBc) −30 HARMONIC DISTORTION vs FREQUENCY (Differential, 2VPP, MGS = 100) −40 −55 −60 −65 −70 −30 −35 −55 −60 −65 −70 VCA CN TL = 0.9V, H2 VCA CN TL = 0.9V, H3 VCA CN TL = 2.9V, H2 VCA CN TL = 2.9V, H3 Frequency (Hz) 10M Harmonic Distortion (dBc) Harmonic Distortion (dBc) −50 1M 1M 10M Frequency (Hz) −40 −45 −85 −90 100k 0.9V, H2 0.9V, H3 2.9V, H2 2.9V, H3 −50 −80 100k 10M −35 −80 = = = = −75 HARMONIC DISTORTION vs FREQUENCY (Single−Ended, 1VPP, MGS = 010) −75 VCA C NTL VCA C NTL VCA C NTL VCA C NTL −45 Frequency (Hz) −30 HARMONIC DISTORTION vs FREQUENCY (Differential, 2VPP, MGS = 111) HARMONIC DISTORTION vs FREQUENCY (Single−Ended, 1VPP, MGS = 100) −40 −45 −50 −55 −60 −65 −70 −75 VCA CN TL = 0.9V, H2 −80 VCA CN TL = 0.9V, H3 VCA CN TL = 2.9V, H2 VCA CN TL = 2.9V, H3 −85 −90 100k 1M 10M Frequency (Hz) 7 " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 TYPICAL CHARACTERISTICS (continued) At TA = 25°C and VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2VPP) MGS = 111, and fIN = 5MHz, unless otherwise noted. HARMONIC DISTORTION vs FREQUENCY (Single−Ended, 1VPP, MGS = 111) −30 −35 Harmonic Distortion (dBc) Harmonic Distortion (dBc) −40 −45 −50 −55 −60 −65 −70 −75 −80 VCA C NTL = 0.9V, H2 VCA C NTL = 0.9V, H3 VCA C NTL = 2.9V, H2 VCA C NTL = 2.9V, H3 −85 −90 100k 1M MGS = 010, H2 MGS = 100, H2 MGS = 111, H2 MGS = 010, H3 MGS = 100, H3 MGS = 111, H3 0.9 10M 1.5 1.7 1.9 2.1 2.3 2.5 INTERMODULATION DISTORTION (Single−Ended, 1VPP , f IN = 10MHz) MGS = 010, MGS = 100, MGS = 111, MGS = 010, MGS = 100, MGS = 111, −40 2.7 2.9 0 H2 H2 H2 H3 H3 H3 −10 −20 −45 −50 −55 −30 −40 −50 −60 −70 −80 −90 −65 −100 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 9.5 VCACNTL (V) 9.6 9.7 9.8 9.9 10.0 10.1 10.2 10.3 10.4 10.5 Frequency (MHz) CROSS TALK vs FREQUENCY (Differential, 2VPP, MGS = 011) INTERMODULATION DISTORTION (Differential, 2 VPP, fIN = 10MHz) 0 0 −10 −10 −20 −30 Cross Talk (dB) Amplitude (dB) 1.3 HARMONIC DISTORTION vs VCACNTL (Single−Ended, 1VPP, 5MHz) −60 −40 −50 −60 −70 −80 VCACNTL = 0.9V −20 −30 −40 VCACNTL = 1.9V −50 −60 −90 VCACNTL = 2.9V −70 −100 9.5 8 1.1 VCACNTL (V) −35 Harmonic Distortion (dBc) 0 −5 −10 −15 −20 −25 −30 −35 −40 −45 −50 −55 −60 −65 −70 −75 −80 Frequency (Hz) Amplitude (dB) −30 HARMONIC DISTORTION vs VCACNTL (Differential, 2VPP, 5MHz) 9.6 9.7 9.8 9.9 10.0 10.1 10.2 10.3 10.4 10.5 Frequency (MHz) 1M 10M Frequency (Hz) 20M " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 TYPICAL CHARACTERISTICS (continued) At TA = 25°C and VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2VPP) MGS = 111, and fIN = 5MHz, unless otherwise noted. OVERLOAD DISTORTION vs FREQUENCY 55 0.2V 0.3V 0.5V 1V −10 ICC (CHA and CHB) vs TEMPERATURE 54 53 52 −20 ICC (mA) 2nd−Harmonic Distortion (dBc) 0 −30 −40 51 50 49 48 47 −50 46 −60 45 1M 10M −40 −30 −20 −10 0 10 20 30 40 50 60 70 80 90 Temperature (_C) Frequency (Hz) OVERVIEW The VCA2619 is a dual-channel, VGA consisting of three primary blocks: an Input Buffer, a VCA, and a PGA. All stages are ac coupled, with the coupling into the PGA stage being made variable by placing an external capacitor between the CP1 and CP2 pins. This will be discussed further in the PGA section. By using the internal coupling into the PGA, the result is a high-pass filter characteristic with cutoff at approximately 75kHz. The output PGA naturally rolls off at around 30MHz, making the usable bandwidth of the VCA2619 between 75kHz and 30MHz. Channel A Input Buffer Analog Control VCA Control Channel B Input VCA Buffer VCA PGA Channel A Output Maximum Gain Select MGS PGA Channel B Output INPUT BUFFER The input buffer is a unity gain amplifier (gain of +1) with a bandwidth of 100MHz with an input resistance of approximately 600kΩ. The input buffer isolates the circuit driving the VCA2619 inputs from the internal VCA block, which would present a varying impedance to the input circuitry. To allow symmetrical operation of the input buffer, the input to the buffer must be ac coupled through an external capacitor. The recommended value of the capacitor is 0.01µF. It should be noted that if the capacitor value were increased, the power-on time of the VCA2619 would be increased. If a decrease in the power-on time is needed, the value can be decreased to no less than 100pF. Figure 1. Simplified Block Diagram of the VCA2619. 9 " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 VOLTAGE-CONTROLLED ATTENUATOR The MGS bits adjust the overall range of attenuation and maximum gain while the VCACNTL voltage adjusts the actual attenuation factor. Figure 3 is a simplified version of the voltage control attenuator. Figure 4 illustrates the piecewise approximation to the logarithmic control characteristics. At any given maximum gain setting, the analog variable gain characteristic is linear in dB as a function of the control voltage, and is created as a piecewise approximation of an ideal dB-linear transfer function. The VCA control circuitry is common to both channels of the VCA2619. The range for the VCACNTL input spans from 0V to 3V. Although overdriving the VCA CNTL input above the recommended 3V maximum will not damage the part, this condition should be avoided. The magnitude of the VCA input signal from the input buffer is reduced by a programmable attenuation factor, set by the analog VCA Control Voltage (VCACNTL) at pin 24. The maximum attenuation is programmable by using the three MGS bits (pins 21, 22, and 23). Figure 2 illustrates this dual-adjust characteristic. VCA Attenuation (dB) 0 Minimum Attenuation −41 Maximum Attenuation −52.3 0 3.0V Control Voltage Figure 2. Swept Attenuator Characteristic. RS Input Output Q1A Q1B Q2A Q2B Q3A Q3B Q4A Q4B Q5A VCM A1 A2 A3 A4 B1 B2 Figure 3. Simplified Attenuator Diagram. 10 A5 Q5B " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 Attenuator Input RS A1 to A10 Attenuator Stages Attenuator Output QS Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 VCM A1 A2 A3 C1 A4 C2 V1 A5 C3 V2 V3 A6 C4 V4 C5 A8 C6 V5 Control Input A7 A9 C7 V6 A10 C8 V7 C9 V8 C10 V9 V10 C1 to C10 Clipping Amplifiers 0dB −5.2dB Attenuation Characteristic of Individual FETs VCM − VT 0 V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 Characteristic of Attenuator Control Stage Output OVERALL CONTROL CHARACTERISTICS OF ATTENUATOR 0dB −52.3dB 0.2V Control Signal 3V Figure 4. Piecewise Approximation to Logarithmic Control Characteristics. 11 " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 Table 1. MGS Settings. PGA POST-AMPLIFIER Figure 5 shows a simplified circuit diagram of the PGA block. As stated before, the input to the PGA is ac coupled with an internal capacitor. Provisions are made so that an external capacitor can be placed in parallel with the internal capacitor, thus lowering the usable low-frequency bandwidth. The low-frequency bandwidth is set by the following equation: 1 (2 @ p @ 500kW @ (220pF ) C EXTERNAL)) MGS SETTING ATTENUATOR GAIN VCACNTL = 0.2V TO 3V ATTENUATOR + DIFFERENTIAL PGA GAIN 000 Not Valid Not Valid 001 Not Valid Not Valid 010 −41.0dB to 0dB −12dB to 29dB −11.5dB to 31.8dB (1) 011 −43.3dB to 0dB 100 −46.4dB to 0dB −11.5dB to 34.9dB 101 −48.2dB to 0dB −10.6dB to 37.6dB 110 −50.2dB to 0dB −9.8dB to 40.4dB 111 −52.3dB to 0dB −9.3dB to 43.3dB where CEXTERNAL is the external capacitor value in farads. The PGA architecture converts the single−ended signal from the VCA into a differential signal. Low input noise was also a requirement of the PGA design due to the large amount of signal attenuation that can be asserted before the PGA. At minimum VCA attenuation (used for small input signals), the input buffer noise dominates; at maximum VCA attenuation (large input signals), the PGA noise dominates. Note that if the PGA output is single−ended, the apparent gain will be 6dB lower. Care should be taken to avoid using too large a value of capacitor, as this can increase the power-on delay time. The PGA gain is programmed with the same MGS bits that control the VCA maximum attenuation factor. For VCACNTL = 3V (no attenuation), the VCA + PGA gain will be controlled by the programmed PGA gain (29dB to 43dB in approximately 3dB steps). For clarity, the gain and attenuation factors are detailed in Table I. VDD To Bias Circuitry Q1 RL VCAOUTP Q11 Q12 Q3 VCM Q9 RL VCAOUTN Q8 RS1 VCM Q13 RS2 +In Q4 Q7 Q14 Q2 Q5 Q10 Q6 To Bias Circuitry Figure 5. Simplified Block Diagram of PGA. 12 −In " #$%& www.ti.com SBOS276A − AUGUST 2003 − REVISED AUGUST 2003 LAYOUT CONSIDERATIONS Adequate power−supply decoupling must be used in order to achieve the best possible performance. Decoupling capacitors on the VCACNTL voltage should also be used to help minimize noise. Recommended values can be obtained from the layout diagram of Figure 6. The VCA2619 is an analog amplifier capable of high gain. When working on a PCB layout for the VCA2619, it is recommended to utilize a solid ground plane that is connected to analog ground. This helps to maximize the noise performance of the VCA2619. +5V 0.1µF 1µF +5V 0.01µF INA 1 0.1µF 0.1µF 1µF 1µF INA 28 3 5 VDDA VDDR VCM −OUTA +OUTA 25 26 0.01µF −OUTA 0.01µF +OUTA VCA2619 −OUTB 0.01µF INB 8 INB +OUTB 16 15 0.01µF −OUTB 0.01µF +OUTB VDDB VBIAS VCNTL 13 4 24 1µF 0.1µF 0.1µF +5V 1µF 0.1µF VCACNTL Figure 6. VCA2619 Layout. 13 PACKAGE OPTION ADDENDUM www.ti.com 28-Aug-2010 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins VCA2619YRG4 ACTIVE TQFP PBS 32 VCA2619YT ACTIVE TQFP PBS 32 Package Qty Eco Plan (2) TBD 250 Green (RoHS & no Sb/Br) Lead/ Ball Finish Call TI MSL Peak Temp (3) Samples (Requires Login) Call TI Purchase Samples CU NIPDAU Level-3-260C-168 HR Request Free Samples (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. 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Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 23-Jul-2010 TAPE AND REEL INFORMATION *All dimensions are nominal Device VCA2619YT Package Package Pins Type Drawing TQFP PBS 32 SPQ 250 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 177.8 16.4 Pack Materials-Page 1 7.2 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 7.2 1.5 12.0 16.0 Q2 PACKAGE MATERIALS INFORMATION www.ti.com 23-Jul-2010 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) VCA2619YT TQFP PBS 32 250 190.5 212.7 31.8 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 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