OPA4323 Series

Quad, 5.5-V, 20-MHz, zero-cross low-noise (6 nV/√Hz) RRIO operational amplifier

Catalog

Quad, 5.5-V, 20-MHz, zero-cross low-noise (6 nV/√Hz) RRIO operational amplifier

Part	Output Type	Number of Circuits	Supplier Device Package	Voltage - Supply Span (Max) [Max]	Current - Supply	Voltage - Input Offset	Mounting Type	Gain Bandwidth Product	Current - Output / Channel	Slew Rate	Amplifier Type	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Voltage - Supply Span (Min) [Min]	Current - Input Bias	Package / Case [custom]	Package / Case [custom]
Texas Instruments OPA4323IDYYR	Rail-to-Rail Single Ended	4	14-SOT-23-THIN	5.5 V	1.6 mA	150 µV	Surface Mount	20 MHz	110 mA	33 V/µs	Chopper (Zero-Drift)	-40 °C	125 °C	SOT-23-14 Thin SOT-23 Variant	1.7 V	0.5 pA
Texas Instruments OPA4323IPWR	Rail-to-Rail Single Ended	4	14-TSSOP	5.5 V	1.6 mA	150 mV	Surface Mount	20 MHz	110 mA	33 V/µs	Chopper (Zero-Drift)	-40 °C	125 °C	14-TSSOP	1.7 V	0.5 pA	0.173 "	4.4 mm

Catalog

Quad, 5.5-V, 20-MHz, zero-cross low-noise (6 nV/√Hz) RRIO operational amplifier

Key Features

• Zero cross amplifier for 1.7V to 5.5V applicationsHigh rail-to-rail CMRR: 114dB typicalHigh gain-bandwidth product: 20MHzFast slew-rate: 33V/µs typicalFast 0.01% settling: 200ns typical for 2V stepLow input offset voltage: ±150µV typicalLow noise floor: 5.5nV/√Hz typical at 10kHzHigh output current: ±110mA typical ISC at 5.5VQuiescent current: 1.6mA/ch typicalRail-to-rail input and outputUnity-gain stableDrives up to 150pF without sustained oscillationsInternal RFI and EMI filtered input pinsOperating temperature range: –40°C to 125°CZero cross amplifier for 1.7V to 5.5V applicationsHigh rail-to-rail CMRR: 114dB typicalHigh gain-bandwidth product: 20MHzFast slew-rate: 33V/µs typicalFast 0.01% settling: 200ns typical for 2V stepLow input offset voltage: ±150µV typicalLow noise floor: 5.5nV/√Hz typical at 10kHzHigh output current: ±110mA typical ISC at 5.5VQuiescent current: 1.6mA/ch typicalRail-to-rail input and outputUnity-gain stableDrives up to 150pF without sustained oscillationsInternal RFI and EMI filtered input pinsOperating temperature range: –40°C to 125°C

Description

The OPAx323 family of op amps includes single (OPA323), dual (OPA2323), and quad-channel (OPA4323), low-voltage (1.7V to 5.5V), high-bandwidth (20MHz) amplifiers (op amps) with a zero-crossover input stage and a rail-to-rail output stage. The zero-crossover input stage enables OPAx323 to achieve high linearity and low distortion for input signals with rail-to-rail swing that are typical in ADC driver applications. Gain-bandwidth of 20MHz provides a fast settling response for ADC sampling speeds between 0.5MSPS to 5MSPS depending on the settling performance required. The OPAx323 is well-optimized for power savings as the device consumes just 1.6mA typical quiescent current. The OPAx323 easily supports precision performance in high gain voltage sensing applications such as the wheatsone bridge, as it features maximum offset drift of 2µV/°C and thermal noise floor of 5.5nV/rt-Hz with a minimum of 100dB CMRR. This unique combination of higher precision (low offset, drift, noise, distortion, and CMRR) and higher gain-bandwidth (fast settling and slewing) enables use in multiple applications such as the motor rotary encoders, microphone audio pre-amplifiers and ultrasonic transducers. The OPAx323 achieves a high slew-rate of 33V/µs allowing for fast detection of faults in motor current sensing applications. Unlike traditional amplifiers, the zero-cross over input stage allows for identical precision performance for both low and high-side sensing applications, thus making OPAx323 the best choice for current sensing in a variety of end equipments such as the solar string inverters, power delivery, grid and EV infrastructure. OPAx323S devices provide shutdown functionality for additional power savings and help disable the amplifier when idle. The family features standard and small size as well as leaded and QFN packages across all the channel variants. The OPAx323 family of op amps includes single (OPA323), dual (OPA2323), and quad-channel (OPA4323), low-voltage (1.7V to 5.5V), high-bandwidth (20MHz) amplifiers (op amps) with a zero-crossover input stage and a rail-to-rail output stage. The zero-crossover input stage enables OPAx323 to achieve high linearity and low distortion for input signals with rail-to-rail swing that are typical in ADC driver applications. Gain-bandwidth of 20MHz provides a fast settling response for ADC sampling speeds between 0.5MSPS to 5MSPS depending on the settling performance required. The OPAx323 is well-optimized for power savings as the device consumes just 1.6mA typical quiescent current. The OPAx323 easily supports precision performance in high gain voltage sensing applications such as the wheatsone bridge, as it features maximum offset drift of 2µV/°C and thermal noise floor of 5.5nV/rt-Hz with a minimum of 100dB CMRR. This unique combination of higher precision (low offset, drift, noise, distortion, and CMRR) and higher gain-bandwidth (fast settling and slewing) enables use in multiple applications such as the motor rotary encoders, microphone audio pre-amplifiers and ultrasonic transducers. The OPAx323 achieves a high slew-rate of 33V/µs allowing for fast detection of faults in motor current sensing applications. Unlike traditional amplifiers, the zero-cross over input stage allows for identical precision performance for both low and high-side sensing applications, thus making OPAx323 the best choice for current sensing in a variety of end equipments such as the solar string inverters, power delivery, grid and EV infrastructure. OPAx323S devices provide shutdown functionality for additional power savings and help disable the amplifier when idle. The family features standard and small size as well as leaded and QFN packages across all the channel variants.