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| TS925 Rail-to-Rail High Output Current Quad Operational Amplifiers With Standby Mode and Adjustable Phantom Ground Rail-to-rail input and output Low noise: 9nV/Hz Low distortion High output current: 80mA (able to drive 32 loads) High-speed: 4MHz, 1.3V/s Operating from 2.7V to 12V Low input offset voltage: 900V max. (TS925A) Adjustable phantom ground (VCC/2) Standby mode ESD internal protection: 2kV Latch-up immunity N DIP16 (Plastic Package) D SO-16 (Plastic Micropackage) P TSSOP16 (Thin Shrink Small Outline Package) Description The TS925 is a rail-to-rail quad BiCMOS operational amplifier optimized and fully specified for 3V and 5V operation. 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 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. The device is stable for capacitive loads up to 500pF. When the STANDBY mode is enabled, the total consumption drops to 6A (VCC = 3V). Pin connections (top view) Output 1 Inverting Input 1 Non-inverting Input 1 V CC+ Non-inverting Input 2 Inverting Input 2 Output 2 Phantom ground 1 2 3 4 5 6 7 8 + + + + 14 13 12 11 10 9 16 15 Output 4 Inverting Input 4 Non-inverting Input 4 V CC Non-inverting Input 3 Inverting Input 3 Output 3 Stdby Applications Headphone amplifier Soundcard amplifier, piezoelectric speaker MPEG boards, multimedia systems... Cordless telephones and portable communication equipment Line driver, buffer Instrumentation with low noise as key factor November 2005 Rev 2 1/17 www.st.com 17 TS925 Order Codes Part Number TS925IN TS925ID/IDT TS925IPT TS925AIN TS925AID TS925AIPT -40C to +125C Temperature Range Package DIP16 SO-16 TSSOP16 DIP16 SO-16 TSSOP16 Packing DIP16 SO-16 TSSOP16 DIP16 SO-16 TSSOP16 Marking TS925IN 925I TS925AIN 925AI 2/17 TS925 Absolute Maximum Ratings 1 Absolute Maximum Ratings Table 1. Symbol VCC Vid Vi Tj Rthja Key parameters and their absolute maximum ratings Parameter Supply voltage (1) Differential Input Voltage (2) Input Voltage Maximum Junction Temperature SO-16 Thermal Resistance Junction to TSSOP16 Ambient DIP16 SO-16 Thermal Resistance Junction to TSSOP16 Case DIP16 HBM Human Body Model(3) MM Machine Model(4) CDM Charged Device Model Output Short Circuit Duration Latch-up Immunity Soldering Temperature 10sec, Pb-free package Condition Value 14 1 VDD -0.3 to VCC+0.3 150 95 95 63 30 25 33 2 200 1 see note(5) 200 260 mA C Unit V V V C C/W Rthjc C/W kV V kV ESD Electro-Static Discharge 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 > 1V, the maximum input current must not exceed 1mA. In this case (Vid > 1V) an input serie resistor must be added to limit input current. 3. Human body model, 100pF discharged through a 1.5k resistor into pin of device. 4. Machine model ESD, a 200pF cap is charged to the specified voltage, then discharged directly into the IC with no external series resistor (internal resistor < 5), 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 80mA, independent of the magnitude of Vcc. Destructive dissipation can result from simultaneous short-circuits on all amplifiers. Table 2. Symbol VCC Vicm Toper Operating conditions Parameter Supply Voltage Common Mode Input Voltage Range Operating Free Air Temperature Range Value 2.7 to 12 VDD -0.2 to VCC +0.2 -40 to +125 Unit V V C 3/17 Electrical Characteristics TS925 2 Electrical Characteristics Table 3. Symbol Vio Electrical characteristics for VCC = 3V, VDD = 0V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25C (unless otherwise specified) Parameter Input Offset Voltage Conditions at Tamb = +25C TS925 TS925A at Tmin. Tamb Tmax: TS925 TS925A 3 0.9 5 1.8 2 Vout = 1.5V Vout = 2.5V RL = 10k RL = 600 RL = 32 RL = 10k RL = 600 RL = 32 Vout = 2Vpk-pk RL = 10k RL = 600 RL = 32 200 35 16 4 60 Vcc = 2.7 to 3.3V 60 50 0.7 RL = 600, CL =100pF RL = 600, CL =100pF f = 1kHz Vout = 2Vpk-pk, f = 1kHz, Av = 1, RL = 600 80 85 80 1.3 68 12 9 V/mV 2.90 2.87 2.63 50 100 180 1 15 30 100 V/C nA nA Min. Typ. Max. Unit mV DV io Iio Iib VOH Input Offset Voltage Drift Input Offset Current Input Bias Current High Level Output Voltage V VOL Low Level Output Voltage mV Avd Large Signal Voltage Gain GBP CMR SVR Io SR Pm GM en THD Gain Bandwidth Product Common Mode Rejection Ratio Supply Voltage Rejection Ratio Output Short-Circuit Current Slew Rate Phase Margin at Unit Gain Gain Margin Equivalent Input Noise Voltage Total Harmonic Distortion RL = 600 MHz dB dB mA V/s Degrees dB nV ----------Hz 0.01 % Cs Channel Separation 120 dB 4/17 TS925 Table 4. Symbol ICC Istby Electrical Characteristics Global circuit Parameter Total Supply Current Total Supply Current in STANDBY (1) Conditions No load, Vout = Vcc/2 Pin 9 connected to Vccat Tamb = +25C at Tmin T amb Tmax at Tamb = +25C at Tmin T amb Tmax Min. Typ 5 6 Max. 7 Unit mA A Venstby Pin 9 Voltage to enable the STANDBY mode Vdistby Pin 9 Voltage to disable the STANDBY mode (1) 0.3 0.4 1.1 1 V V 1. The STANDBY mode is currently enabled when Pin 9 is GROUNDED and disabled when Pin 9 is left OPEN. Table 5. Symbol Vpg Ipgsc Zpg Enpg Phantom ground Parameter Phantom Ground Output Voltage Phantom Ground Output Short Circuit Current - Sourced Phantom Ground Impedance Phantom Ground Output Voltage Noise DC to 20kHz f = 1kHz Cdec = 100pF Cdec = 1nF Cdec = 10nF(1) 12 Conditions No Output Current Min. Vcc/2 -5% 12 Typ V cc/2 Max. Vcc/2 +5% Unit V mA nV ----------Hz 18 3 200 40 17 18 Ipgsk Phantom Ground Output Short Circuit Current - Sinked mA 1. Cdec is the decoupling capacitor on Pin9. 5/17 Electrical Characteristics Table 6. Symbol Vio TS925 Electrical characteristics for VCC = 5V, V DD = 0V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25C (unless otherwise specified) Parameter Input Offset Voltage Conditions at T amb = +25C: TS925 TS925A at T min. T amb Tmax: TS925 TS925A 3 0.9 5 1.8 2 Vout = 2.5V Vout = 2.5V RL= 10k RL = 600 RL = 32 RL= 10k RL = 600 RL = 32 Vout = 2Vpk-pk RL= 10k RL = 600 RL = 32 200 40 17 4 60 Vcc = 3 to 5V 60 50 0.7 RL = 600, CL =100pF RL = 600, CL =100pF f = 1kHz Vout = 2V pk-pk, f = 1kHz, Av = 1, RL = 600 80 85 80 1.3 68 12 9 0.01 120 V/mV 4.90 4.85 4.4 50 120 300 1 15 30 100 V/C nA nA mV Min. Typ. Max. Unit DV io Iio Iib VOH Input Offset Voltage Drift Input Offset Current Input Bias Current High Level Output Voltage V VOL Low Level Output Voltage mV Avd Large Signal Voltage Gain GBP CMR SVR Io SR Pm GM en THD Cs Gain Bandwidth Product Common Mode Rejection Ratio Supply Voltage Rejection Ratio Output Short-Circuit Current Slew Rate Phase Margin at Unit Gain Gain Margin Equivalent Input Noise Voltage Total Harmonic Distortion Channel Separation RL = 600 MHz dB dB mA V/s Degrees dB nV ----------Hz % dB 6/17 TS925 Table 7. Symbol ICC Istby Venstby Vdistby Electrical Characteristics Global circuit Parameter Total Supply Current Total Supply Current in STANDBY Pin 9 Voltage to enable the STANDBY mode (1) Conditions No load, Vout = Vcc/2 Pin 9 connected to Vccat Tamb = +25C at Tmin Tamb Tmax at Tamb = +25C at Tmin Tamb Tmax Min. Typ 6 6 Max. 8 Unit mA A 0.3 0.4 1.1 1 V Pin 9 Voltage to disable the STANDBY mode (1) V 1. the STANDBY mode is currently enabled when Pin 9 is GROUNDED and disabled when Pin 9 is left OPEN. Table 8. Symbol Vpg Ipgsc Zpg Phantom ground Parameter Phantom Ground Output Voltage Phantom Ground Output Short Circuit Current - Sourced Phantom Ground Impedance Phantom Ground Output Voltage Noise Phantom Ground Output Short Circuit Current - Sinked DC to 20kHz f = 1kHz Cdec = 100pF Cdec = 1nF Cdec = 10nF(1) 12 Conditions No Output Current Min. Vcc/2 -5% 12 Typ Vcc/2 Max. V cc/2 +5% Unit V mA nV ----------Hz 18 3 Enpg 200 40 17 18 Ipgsk mA 1. Cdec is the decoupling capacitor on Pin9. 7/17 Electrical Characteristics Figure 1. Input offset voltage distribution Figure 2. TS925 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 8/17 TS925 Figure 7. Output short circuit current vs. temperature Figure 8. Electrical Characteristics Voltage gain and phase vs. frequency Figure 9. Distortion + noise vs. frequency Figure 10. THD + noise vs. frequency Figure 11. THD + noise vs. frequency Figure 12. THD + noise vs. frequency 9/17 Electrical Characteristics Figure 13. Equivalent input noise vs. frequency TS925 Figure 14. Total supply current vs. standby input voltage Figure 15. Phantom ground short circuit output current vs. phantom ground output voltage 10/17 TS925 Using the TS925 as a preamplifier and speaker driver 3 Using the TS925 as a preamplifier and speaker driver The TS925 is an input/output rail-to-rail quad BiCMOS operational amplifier. It is able to operate with low supply voltages (2.7V) and to drive low output loads such as 32. As an illustration of these features, the following technical note highlights many of the advantages of the device in a global audio application. 3.1 Application circuit Figure 16 shows two operators (A1, A4) used in a preamplifier configuration, and the two others 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 from two LR6 batteries (2 x 1.5V nominal). Preamplifier 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 chosen: * R4 = 22k - R3 = 50 - R17 = 1.2k * R6 = 47k - R5 = 1.2k, The gain of the preamplifier chain is therefore equal to 58dB. 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. 11/17 Using the TS925 as a preamplifier and speaker driver Figure 16. Electrical schematic M ike p re am p lifie r C9 M IC R O P H O N E TS925 C1 M IKE OUTPUT R2 C4 C14 R3 R5 C6 C2 C3 AL C R 18 R 17 C5 D1 D2 R8 Vcc P H AN TO M G R O U N D 8 4 9 13 C1 5 C1 0 C 18 C 8 R7 Q1 C7 STBY C9 R 11 R 12 R 10 R 13 C 12 7 H E AD PH O N E S 6 R 15 5 C 13 11 10 12 C 10 H e ad ph on es a m plifier A M P LIF IE R IN P U T LEFT C 11 R1 6 A M P LIF IE R IN P U T R IG H T 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 head-phone speakers. This configuration shows the ability of the circuit to drive 32 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). 12/17 TS925 Using the TS925 as a preamplifier and speaker driver Figure 18. Voltage noise density vs. frequency at preamplifier output 15 Figure 17. Frequency response of the global preamplifier chain 70 14 Nois e Dens ity (n V /sqrt(Hz )) 60 13 12 11 10 9 8 V oltag e Gain ( dB) 50 40 30 20 1 00 1 00 0 1 00 00 1 00 0 00 1 00 0 00 0 1 00 0 00 00 1 .0 E +0 8 7 10 100 1000 1 0 00 0 1 0 00 0 0 frequency (Hz) fre q u e n c y ( H z ) Figure 19. Maximum voltage swing at headphone outputs (RL = 32) Figure 20. THD + noise vs. frequency (headphone outputs) 0 .4 0.3 5 0 .3 THD+noise (%) 0.2 5 0 .2 0.1 5 0 .1 0.0 5 0 100 1 0 00 10000 1 0 0 0 00 Hz 13/17 Package Mechanical Data TS925 4 Package Mechanical Data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 4.1 DIP16 Package Plastic DIP-16 (0.25) MECHANICAL DATA mm. DIM. MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 TYP MAX. MIN. 0.020 0.030 0.020 0.010 0.787 0.065 TYP. MAX. inch P001C 14/17 TS925 Package Mechanical Data 4.2 SO-16 Package SO-16 MECHANICAL DATA DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 8 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45 (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.004 MIN. inch TYP. MAX. 0.068 0.008 0.064 0.018 0.010 PO13H 15/17 Package Mechanical Data TS925 4.3 TSSOP16 Package TSSOP16 MECHANICAL DATA mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 4.9 6.2 4.3 5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 5.1 6.6 4.48 0.002 0.031 0.007 0.004 0.193 0.244 0.169 0.197 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0079 0.201 0.260 0.176 inch A A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0080338D 16/17 TS925 Revision History 5 Revision History Date Feb. 2001 Revision 1 Changes Initial release - Product in full production. The following changes were made in this revision: - Chapter on Macromodels removed from the datasheet. - Data updated in Table 3. on page 4. - Data in tables in Electrical Characteristics on page 4 reformatted for easier use. - Minor grammatical and formatting changes throughout. Nov. 2005 2 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 17/17 |
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