AS3280 ALFA | Alldatasheet

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AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.1 1 AS3280 AS3280A AS3280 – Dual Operational Transconductance Amplifier (OTA) Features Applications

  • Low Initial Input Offset Voltage: 500 µV (Max) (AS3280A)
  • Low Offset Voltage Change vs IABC: <500 µV (Typ)
  • Low Offset Voltage Drift: 5µV/°C (Max) (AS3280A)
  • Excellent Matching of the Two Amplifiers for All Characteristics
  • Internal Current-Driven Linearizing Diodes Reduce the External Input Current to an Offset Component
  • Flexible Supply Voltage Range ±2V to ±15V AS3280D, AS3280AD SOIC-16 150mil, 1.27 mm
  • • Voltage Controlled Amplifiers Oscillators
  • Multipliers
  • • Demodulators
  • • Sample and Hold
  • • Instrumentation Amplifiers
  • • Function Generators
  • • Triangle Wave-to-Sine Wave Converters
  • • Comparators
  • • Audio Preamplifier General Description The AS3280 and AS3280A types consist of two variable operational amplifiers that are designed to substantially reduce the initial input offset voltage and the offset voltage variation with respect to changes in programming current. This design results in reduced "AGC thump," an objectionable characteristic of many AGC systems. Careful design of critical places of the circuit reduces the amplifier dependence upon thermal and processing variables. The AS3280 has all the generic characteristics of an operational voltage amplifier except that the forward transfer characteristics is best described by transconductance rather than voltage gain, and the output is current, not voltage. The magnitude of the output current is equal to the product of transcondu ctance and the input voltage. This type of operational transconductance amplifier has since gained wide acceptance as a gateable, gain controlled building block for instrumentation and audio applications, such as linearization of transducer outputs, standa rdization of widely changing signals for data processing, multiplexing, instrumentation amplifiers operating from the nanopower range to high current and high speed comparators. Pin Information Pinout Top view SOIC-16 Pin No Pin Name Description

1 ID1 Input current with

2 EM1 Emitter 1

3 IABC1 Amplifier bias

5 NC Not connect

6 IABC2 Amplifier bias

7 EM2 Emitter 2

8 ID2 Input current with

9 +IN2 Noninverting input1 10 -IN2 Inverting input 2 11 +VCC2 Positive supply 2

12 OUT2 Output 2

13 OUT1 Output 1

14 +VCC1 Positive supply 1 15 -IN1 Inverting input 1 16 +IN1 Noninverting input1 +VCC2 EM2 IABC2 16 +IN1 -IN1 OUT1 OUT2 +IN2 -IN2 - EEV NC IABC1 ID1 EM1 ID2 +VCC1 Functional diagram of AS3280 1/2 AS3280 3 6 2K2K

AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.1 2 AS3280 AS3280A Absolute Maximum Ratings Supply Voltage (Between V+ and V-)……………..+36V Output Short Circuit Duration (Note 1)………..Indefinite Linearizing Diode Bias Current, ID………………….5mA Peak Input Current with Linearizing Diode…………..±ID Operating Conditions Temperature Range Thermal Information Thermal Resistance (Typical, Note 2) JA (oC/W) JC (oC/W) CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. Short circuit may be applied to ground or to either supply. 2. JA is measured with the component mounted on a low effective thermal conductivity test board in free air. Electrical Specifications TA=25oC, VSUPPLY=±15V, unless otherwise specified PARAMETER SYMBOL TEST CONDITIONS AS3280 AS3280A UNITS MIN TYP MAX MIN TYP MAX Input Offset Voltage VIO IABC = 1mA - - 1,8 - - 0,5 mV IABC = 100µA - 0,7 1,8 - 0,25 0,5 mV IABC = 10µA - - 1,8 - - 0,5 mV IABC = 1mA to 10µА, TA = Full Temp. Range - 0,8 4 - 0,8 1,5 mV Input Offset Voltage Drift |VIO| lABC = 1 µА to 1mA - 0,5 1 - 0,5 1 mV IABC = 100µA, TA = Full Temperature Range - 5 - - 3 5 µV/°C Amplifier Bias Voltage VABC lABC = 100µА - 1,2 - - 1,2 - V Peak Output Voltage VOM+ lABC = 500µА 12,5 12,6 - 12,5 12,6 - V VOM+ lABC = 5µА 12,5 12,8 - 12,5 12,8 - V Common Mode Input Voltage Range VICR lABC = 100µА -13 - 13 -13 - 13 V Noise Voltage eN lABC = 500µА - 20 - - 20 - nV/Hz - 8 - - 8 - nV/Hz - 7 - - 7 - nV/Hz Input Offset Current IIO lABC = 500µА - 0,3 0,5 - 0,3 0,5 µA Input Bias Current IIB lABC = 500µА - 0,1 5 - 0,1 5 µA lABC = 500µА, TA = Full Temperature Range - 3 8 - 3 8 µA

AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.1 3 AS3280 AS3280A Electrical Specifications TA=25oC, VSUPPLY=±15V, unless otherwise specified (Continued) PARAMETER SYMBOL TEST CONDITIONS AS3280 AS3280A UNITS MIN TYP MAX MIN TYP MAX Peak Output Current IOM+ lABC = 500µА Source 350 410 500 350 410 500 µA IOM- Sink -350 -410 -500 -350 -410 -500 µA IOM+ lABC = 5µА Source 3 5 7 3 5 7 µA IOM- Sink -7 -5 -3 -7 -5 -3 µA Peak Output Current Sink and Source IOM-, IOM+ lABC = 500µА, TA=Full Temperature Range 350 450 550 350 450 550 µA Linearization Diodes ID=100µА - 10 - - 10 - µA Offset Current IIOD ID=10µА - 0,5 1 - 0,5 1 µA Dynamic Impedance Rdyn ID=100µА - 700 - - 700 - Ω Diode Network Supply Current ISD lABC = 100µА 250 600 800 250 600 800 µA Amplifier Supply Current (Per Amplifier) I+ lABC = 500µА - 2 2,5 - 2 2,5 mA Amplifier Output Leakage Current IOL lABC = 0, Vo = 0V - 0,015 0,1 - 0,015 0,1 nA lABC = 0, Vo = 30V - 0,15 1 - 0,15 1 nA Common Mode Rejection Ratio lABC = 100µА 80 100 - 80 100 - dB Power Supply Rejection Ratio PSRR lABC = 100µА 86 105 - 86 105 - dB Open Loop Voltage Gain AOL lABC = 100µА, RL = ∞, Vo = 20VP-P 50 100 - 50 100 - kV/V 94 100 - 94 100 - dB Forward Transconductance GM lABC = 50µА, Large Signal - 0,8 1,2 - 0,8 1,2 mS gM lABC = 1mA, Small Signal - 16 22 - 16 22 mS Input Resistance RI lABC = 10µА 0,5 - - 0,5 - - MΩ Channel Separation f =1kHz - 94 - - 94 - dB Open Loop Total Harmonic Distortion THD f = 1kHz, lABC=1,5mA, Bandwidth fT lABC = 1mA, R= 100Ω - 9 - - 9 - MHz Slew Rate, Open Loop SR lABC = 10mА - 125 - - 125 - V/µs Capacitance CI lABC = 100µА Input - 4,5 - - 4,5 - pF CO Output - 7,5 - - 7,5 - pF Output Resistance RO lABC = 100µА - 63 - - 63 - MΩ

AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.1 4 AS3280 AS3280A Device type Package Additional marking AS3380 D SOIC-16 (150mil) ---- AS3380 AD SOIC-16 (150mil) white dot

Package Information

SOIC-16 (150mil) Units: inch (mm)

Revision history

04-Dec-2018 1 Initial version