TS925AID

TS925 Rail-to-rail high output current quad operational amplifiers with standby mode and adjustable phantom ground Features ■ Rail-to-rail input and output ■ Low noise: 9 nV/√Hz ■ Low distortion ■ High output current: 80 mA (able to drive 32 Ω loads) ■ High-speed: 4 MHz, 1.3 V/μs ■ Operating range from 2.7 to 12 V ■ Low input offset voltage: 900 μV max. (TS925A) ■ Adjustable phantom ground (VCC/2) ■ Standby mode ■ ESD internal protection: 2 kV ■ Latch-up immunity D SO-16 (Plastic micropackage) P TSSOP16 (Thin shrink small outline package) Pin connections (top view) Applications ■ MPEG boards, multimedia systems ■ Cordless telephones and portable communication equipment ■ ■ + + 16 Output 4 15 Inverting Input 4 - Non-inverting Input 1 3 14 Non-inverting Input 4 V CC+ 4 13 V CC - Non-inverting Input 2 5 12 Non-inverting Input 3 Inverting Input 2 6 11 Inverting Input 3 Output 2 7 10 Output 3 Phantom ground 8 9 Line drivers, buffers Instrumentation with low noise as key factor - - Soundcard amplifiers, piezoelectric speakers 2 + ■ Inverting Input 1 + Headphone amplifiers 1 - ■ Output 1 Stdby Description The TS925 is a rail-to-rail quad BiCMOS operational amplifier optimized and fully specified for 3- and 5-V operation. The TS925 exhibits very low noise, low distortion and high output current, making this device an excellent choice for high-quality, low-voltage or battery-operated audio/telecom systems. High output current allows low load impedances to be driven. An internal low impedance phantom ground eliminates the need for an external reference voltage or biasing arrangement. The device is stable for capacitive loads up to 500 pF. When the STANDBY mode is enabled, the total consumption drops to 6 μA (VCC = 3 V). April 2011 Doc ID 4949 Rev 4 1/18 www.st.com 18 Absolute maximum ratings and operating conditions 1 TS925 Absolute maximum ratings and operating conditions Table 1. Symbol Absolute maximum ratings Value Unit Supply voltage (1) 14 V Vid Differential input voltage (2) ±1 V Vi Input voltage VDD -0.3 to VCC +0.3 V Tj Maximum junction temperature 150 °C Rthja Thermal resistance junction to ambient SO-16 TSSOP16 95 95 °C/W Rthjc Thermal resistance junction to case SO-16 TSSOP16 30 25 °C/W HBM Human body model(3) 2 kV 200 V 1 kV VCC ESD Parameter Conditions Electrostatic discharge MM Machine model(4) CDM Charged device model See note(5) Output short circuit duration Latch-up immunity Soldering temperature 10 sec, Pb-free package 200 mA 260 °C 1. All voltage values, except differential voltage are with respect to network ground terminal. 2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. If Vid > ±1 V, the maximum input current must not exceed ±1mA. In this case (Vid > ±1V), an input series resistor must be added to limit input current. 3. Human body model: 100pF discharged through a 1.5 kΩ resistor into pin of device. 4. Machine model ESD: a 200 pF cap is charged to the specified voltage, then discharged directly into the IC with no external series resistor (internal resistor < 5 Ω), into pin-to-pin of device. 5. There is no short-circuit protection inside the device: short-circuits from the output to Vcc can cause excessive heating. The maximum output current is approximately 80 mA, independent of the magnitude of Vcc. Destructive dissipation can result from simultaneous short-circuits on all amplifiers. Table 2. Operating conditions Symbol 2/18 Parameter VCC Supply voltage Vicm Common mode input voltage range Toper Operating free air temperature range Doc ID 4949 Rev 4 Value Unit 2.7 to 12 V VDD -0.2 to VCC +0.2 V -40 to +125 °C TS925 2 Electrical characteristics Electrical characteristics Table 3. Electrical characteristics for VCC = 3 V with VDD = 0 V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25° C (unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance Vio DVio At Tamb = +25°C TS925 TS925A At Tmin. ≤Tamb ≤Tmax: TS925 TS925A Input offset voltage mV 3 0.9 5 1.8 Input offset voltage drift μV/°C 2 Iio Input offset current Vout = 1.5V 1 30 nA Iib Input bias current Vout = 2.5V 15 100 nA CMR Common mode rejection ratio Vicm from 0 to 3 V Tmin ≤ Tamb ≤ Tmax 60 VOH High level output voltage RL = 10kΩ RL = 600Ω RL = 32Ω 2.90 2.87 VOL Low level output voltage 80 dB V 2.63 RL = 10kΩ RL = 600Ω RL = 32Ω 180 Vout = 2Vpk-pk RL = 10kΩ RL = 600Ω RL = 32Ω 200 35 16 50 100 mV V/mV Avd Large signal voltage gain SVR Supply voltage rejection ratio Vcc = 2.7 to 3.3V 60 85 dB Output short-circuit current 50 80 mA Io ICC Total supply current No load, Vout = Vcc/2 5 Istby Total supply current in STANDBY Pin 9 connected to Vcc- 6 Venstby Pin 9 voltage to enable the STANDBY mode (1) at Tamb = +25°C at Tmin ≤Tamb ≤Tmax Vdistby Pin 9 voltage to disable the STANDBY mode(1) at Tamb = +25°C at Tmin ≤Tamb ≤Tmax 7 mA μA 0.3 0.4 V 1.1 1 V AC performance GBP Gain bandwidth product SR Slew rate Pm Phase margin at unit gain RL = 600Ω 0.7 RL = 600Ω, CL =100pF Doc ID 4949 Rev 4 4 MHz 1.3 V/μs 68 Degrees 3/18 Electrical characteristics Table 3. TS925 Electrical characteristics for VCC = 3 V with VDD = 0 V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25° C (unless otherwise specified) (continued) Symbol Parameter Conditions GM Gain margin RL = 600Ω, CL =100pF en Equivalent input noise voltage f = 1kHz Total harmonic distortion Vout = 2Vpk-pk, f = 1kHz, Av = 1, RL = 600Ω THD Cs Min. Channel separation Typ. Max. Unit 12 dB 9 nV -----------Hz 0.01 % 120 dB Phantom ground Vpg Phantom ground output voltage Ipgsc Phantom ground output short circuit current - sourced Zpg Phantom ground impedance DC to 20kHz Enpg Phantom ground output voltage noise f = 1kHz Cdec = 100pF Cdec = 1nF Cdec = 10nF(2) Ipgsk Phantom ground output short circuit current - sinked No output current Vcc/2 -5% Vcc/2 12 18 mA 3 Ω 200 40 17 nV -----------Hz 18 mA 12 Vcc/2 +5% 1. The STANDBY mode is enabled when pin 9 is GROUNDED and disabled when pin 9 is left OPEN. 2. Cdec is the decoupling capacitor on pin 9. 4/18 Doc ID 4949 Rev 4 V TS925 Electrical characteristics Table 4. Electrical characteristics for VCC = 5 V, VDD = 0 V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25° C (unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance Vio DVio At Tamb = +25°C: TS925 TS925A At Tmin. ≤Tamb ≤Tmax: TS925 TS925A Input offset voltage 3 0.9 mV 5 1.8 Input offset voltage drift μV/°C 2 Iio Input offset current Vout = 2.5V 1 30 nA Iib Input bias current Vout = 2.5V 15 100 nA CMR Common mode rejection ratio Vicm from 0 to 5 V Tmin ≤ Tamb ≤ Tmax VOH High level output voltage RL= 10kΩ RL = 600Ω RL = 32Ω VOL Low level output voltage 60 80 dB 4.90 4.85 V 4.4 50 120 RL= 10kΩ RL = 600Ω RL = 32Ω 300 Vout = 2Vpk-pk RL= 10k RL = 600Ω RL = 32Ω 200 40 17 V/mV mV Avd Large signal voltage gain SVR Supply voltage rejection ratio Vcc = 3 to 5V 60 85 dB Output short-circuit current 50 80 mA Io ICC Total supply current No load, Vout = Vcc/2 6 Istby Total supply current in STANDBY Pin 9 connected to Vcc- 6 Venstby Pin 9 Voltage to enable the STANDBY mode (1) at Tamb = +25°C at Tmin ≤Tamb ≤Tmax Vdistby Pin 9 voltage to disable the STANDBY mode (1) at Tamb = +25°C at Tmin ≤Tamb ≤Tmax 8 μA 0.3 0.4 1.1 1 mA V V AC performance GBP Gain bandwidth product RL = 600Ω 0.7 4 MHz 1.3 V/μs SR Slew rate Pm Phase margin at unit gain RL = 600Ω, CL =100pF 68 Degrees GM Gain margin RL = 600Ω, CL =100pF 12 dB Doc ID 4949 Rev 4 5/18 Electrical characteristics Table 4. Electrical characteristics for VCC = 5 V, VDD = 0 V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25° C (unless otherwise specified) (continued) Symbol en THD Cs TS925 Parameter Conditions Equivalent input noise voltage f = 1kHz Total harmonic distortion Vout = 2Vpk-pk, f = 1kHz, Av = 1, RL = 600Ω Min. Channel separation Typ. Max. Unit 9 nV -----------Hz 0.01 % 120 dB Phantom ground Vpg Phantom ground output voltage Ipgsc Phantom ground output short circuit current sourced Zpg Phantom ground impedance DC to 20kHz Enpg Phantom ground output voltage noise Ipgsk Phantom ground output short circuit current - sinked No output current Vcc/2 -5% Vcc/2 12 18 mA 3 Ω 200 40 17 nV -----------Hz 18 mA f = 1kHz Cdec = 100pF Cdec = 1nF Cdec = 10nF(2) 12 Vcc/2 +5% 1. The STANDBY mode is enabled when pin 9 is GROUNDED and disabled when pin 9 is left OPEN. 2. Cdec is the decoupling capacitor on pin 9. 6/18 Doc ID 4949 Rev 4 V TS925 Electrical characteristics Figure 1. Input offset voltage distribution Figure 2. Total supply current vs. supply voltage with no load Figure 3. Supply current/amplifier vs. temperature Figure 4. Output short circuit current vs. output voltage Figure 5. Output short circuit current vs. output voltage Figure 6. Output short circuit current vs. output voltage Doc ID 4949 Rev 4 7/18 Electrical characteristics TS925 Figure 7. Output short circuit current vs. temperature Figure 8. Figure 9. Distortion + noise vs. frequency Figure 10. THD + noise vs. frequency Figure 11. THD + noise vs. frequency 8/18 Voltage gain and phase vs. frequency Figure 12. THD + noise vs. frequency Doc ID 4949 Rev 4 TS925 Electrical characteristics Figure 13. Equivalent input noise vs. frequency Figure 14. Total supply current vs. standby input voltage Figure 15. Phantom ground short circuit output current vs. phantom ground output voltage Doc ID 4949 Rev 4 9/18 Using the TS925 as a preamplifier and speaker driver 3 TS925 Using the TS925 as a preamplifier and speaker driver The TS925 is an input/output rail-to-rail quad BiCMOS operational amplifier. It can operate with low supply voltages (2.7 V) and drive output loads as low as 32 Ω. This section illustrates these features by providing an example of how the device can be used as a preamplifier and speaker driver. The application circuit is shown in Figure 16. ● Operators A1and A4 are used in a preamplifier configuration. ● Operators A2 and A3 are used in a push-pull configuration driving a headset. ● The phantom ground is used as a common reference level (VCC/2). ● The power supply is delivered by two LR6 batteries (2 x 1.5 V nominal). Figure 16. Electrical schematic M ike pream plifier C1 C9 M IK E OUTPUT R2 M IC R O P H O N E R5 C6 R3 C4 C 14 D2 D1 C5 C2 C3 C7 R7 R17 R18 A LC Q1 R8 V cc P H A N TO M G R O U N D 8 4 13 9 STBY C15 C10 C18 C8 7 5 HEADPHONES R 12 R13 6 C 10 H eadphones am plifier R15 C 12 R 11 R10 C9 C 13 A M P LIF IE R IN P U T LE F T 11 10 10/18 Doc ID 4949 Rev 4 R16 C 11 12 A M P LIF IE R IN P U T R IG H T TS925 3.1 Using the TS925 as a preamplifier and speaker driver Preamplifier configuration The operators A1 and A4 are wired with a non-inverting gain of respectively: ● A1# (R4/(R3+R17)) ● A4# R6/R5 With the following values: ● R4 = 22 kΩ - R3 = 50 Ω - R17 = 1.2 kΩ ● R6 = 47 kΩ - R5 = 1.2 kΩ, The gain of the preamplifier chain is therefore equal to 58 dB. Alternatively, the gain of A1 can be adjusted by choosing a JFET transistor Q1 instead of R17. This JFET voltage controlled resistor arrangement forms an automatic level control (ALC) circuit, useful in many microphone preamplifier applications. The mean rectified peak level of the output signal envelope is used to control the preamplifier gain. 3.2 Headphone amplifier The operators A2 and A3 are organized in a push-pull configuration with a gain of 5. The stereo inputs can be connected to a CD player and the TS925 can directly drive the headphone speakers. This configuration shows the ability of the circuit to drive a 32 Ω load with a maximum output swing and high fidelity suitable for sound and music. Figure 19 shows the available signal swing at the headset outputs: two other rail-to-rail competitor parts are employed in the same circuit for comparison (note the much-reduced clipping level and crossover distortion). Doc ID 4949 Rev 4 11/18 Using the TS925 as a preamplifier and speaker driver Figure 17. Frequency response of the global preamplifier chain TS925 Figure 18. Voltage noise density vs. frequency at preamplifier output 15 70 14 Nois e D e n s it y ( nV / s qrt(Hz ) ) V o ltag e Gain (d B) 60 50 40 30 13 12 11 10 9 8 20 100 100 0 10 000 10 00 00 1 00 000 0 1 00 000 00 1.0E + 0 8 7 10 frequency (Hz) 100 10 0 0 1 0 000 10 0 00 0 fre q u e ncy (H z) Figure 19. Maximum voltage swing at headphone outputs (RL = 32 Ω) Figure 20. THD + noise vs. frequency (headphone outputs) 0.4 0 .3 5 THD+no ise (%) 0.3 0 .2 5 0.2 0 .1 5 0.1 0 .0 5 0 1 00 1 000 10 000 Hz 12/18 Doc ID 4949 Rev 4 10 0000 TS925 4 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Doc ID 4949 Rev 4 13/18 Package information 4.1 TS925 SO-16 package information Figure 21. SO-16 package mechanical drawing Table 5. SO-16 package mechanical data Dimensions Millimeters Inches Ref. Min. Typ. A Max. Min. Typ. 1.75 0.069 A1 0.10 A2 1.25 b 0.31 0.51 0.012 0.020 c 0.17 0.25 0.007 0.010 D(1) 9.80 9.90 10.00 0.386 0.390 0.394 E 5.80 6.00 6.20 0.228 0.236 0.244 E1(2) 3.80 3.90 4.00 0.150 0.154 0.157 e 0.25 Max. 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k 0 8 ccc 0.10 0.004 1. Does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs not to exceed 0.15 mm in total. 2. Does not include interlead flash or protrusions. Interlead flash or protrusions not to exceed 0.25 mm per side. 14/18 Doc ID 4949 Rev 4 TS925 4.2 Package information TSSOP16 package information Figure 22. TSSOP16 package mechanical drawing b Table 6. TSSOP16 package mechanical data Dimensions Ref. Millimeters Min. Typ. A Inches Max. Min. Typ. 1.20 A1 0.05 A2 0.80 b Max. 0.047 0.15 0.002 1.05 0.031 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 D 4.90 5.00 5.10 0.193 0.197 0.201 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 k 0° L 0.45 L1 aaa 1.00 0.60 0.006 0.039 0.041 0.0256 8° 0° 0.75 0.018 1.00 8° 0.024 0.030 0.039 0.10 Doc ID 4949 Rev 4 0.004 15/18 Ordering information 5 TS925 Ordering information Order code Temperature range TS925ID/IDT TS925IPT TS925AID/AIDT TS925AIPT 16/18 -40°C to +125°C Package Packing SO-16 Tube and tape & reel TSSOP16 Tape & reel SO-16 Tube and tape & reel TSSOP16 Tape & reel Doc ID 4949 Rev 4 Marking 925I 925AI TS925 6 Revision history Revision history 01- Table 7. Document revision history Date Revision 01-Feb-2001 1 Initial release. Product in full production. 2 The following changes were made in this revision: – Chapter on Macromodels removed from the datasheet. – Data updated in Table 3. on page 3. – Data in tables in Electrical characteristics on page 3 reformatted for easier use. – Minor grammatical and formatting changes throughout. 10-Mar-2009 3 Document reformatted. Removed DIP package information in Chapter 4 and associated order codes in Chapter 5. Updated SO-16 and TSSOP16 package drawings and dimensions in Chapter 4. 28-Apr-2011 4 Modified CMR conditions in Table 3 and Table 4. 01-Nov-2005 Changes Doc ID 4949 Rev 4 17/18 TS925 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. 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