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OPA625
  • OPA625
  • OPA625

OPA625

ACTIVE

High Bandwidth, High Precision, Low Noise & Distortion Amplifier SAR ADC Driver with Power Scaling

Texas Instruments OPA625 Product Info

1 April 2026 1

Parameters

Architecture

Voltage FB

Number of channels

1

Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)

2.7

Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)

5.5

GBW (typ) (MHz)

120

BW at Acl (MHz)

80

Acl, min spec gain (V/V)

1.1

Slew rate (typ) (V/µs)

115

Vn at flatband (typ) (nV√Hz)

2.5

Vn at 1 kHz (typ) (nV√Hz)

3.2

Iq per channel (typ) (mA)

2

Vos (offset voltage at 25°C) (max) (mV)

0.1

Rail-to-rail

In to V-, Out

Features

Adjustable BW/IQ/IOUT, C-Load Drive, Shutdown

Rating

Catalog

Operating temperature range (°C)

-40 to 125

CMRR (typ) (dB)

115

Input bias current (max) (pA)

4000000

Offset drift (typ) (µV/°C)

0.5

Iout (typ) (mA)

100

2nd harmonic (dBc)

80

3rd harmonic (dBc)

80

Frequency of harmonic distortion measurement (MHz)

1

Package

SOT-23 (DBV)-6-8.12 mm² 2.9 x 2.8

Features

  • High-Drive Mode:
    • GBW (G = 100): 120 MHz
    • Slew Rate: 115 V/µs
    • 16-Bit Settling at 4-V Step: 280 ns
    • Low Voltage Noise: 2.5 nV/√Hz at 10 kHz
    • Low Output Impedance: 1 Ω at 1 MHz
    • Offset Voltage: ±100 µV (max)
    • Offset Voltage Drift: ±3 µV/ºC (max)
    • LowQuiescent Current: 2 mA (typ)
  • Low-Power Mode:
    • GBW: 1 MHz
    • Low Quiescent Current: 270 µA (typ)
  • Power-Scalable Features:
    • Ultrafast Transition from Low-Power to High-Drive Mode: 170 ns
  • High AC and DC Precision:
    • Low Distortion: –122 dBc for HD2 and –140 dBc for HD3 at 100 kHz
    • Input Common-Mode Range Includes Negative Rail
    • Rail-to-Rail Output
    • Wide Temperature Range: Fully Specified from –40°C to +125°C
  • High-Drive Mode:
    • GBW (G = 100): 120 MHz
    • Slew Rate: 115 V/µs
    • 16-Bit Settling at 4-V Step: 280 ns
    • Low Voltage Noise: 2.5 nV/√Hz at 10 kHz
    • Low Output Impedance: 1 Ω at 1 MHz
    • Offset Voltage: ±100 µV (max)
    • Offset Voltage Drift: ±3 µV/ºC (max)
    • LowQuiescent Current: 2 mA (typ)
  • Low-Power Mode:
    • GBW: 1 MHz
    • Low Quiescent Current: 270 µA (typ)
  • Power-Scalable Features:
    • Ultrafast Transition from Low-Power to High-Drive Mode: 170 ns
  • High AC and DC Precision:
    • Low Distortion: –122 dBc for HD2 and –140 dBc for HD3 at 100 kHz
    • Input Common-Mode Range Includes Negative Rail
    • Rail-to-Rail Output
    • Wide Temperature Range: Fully Specified from –40°C to +125°C

Description

The OPAx625 family of operational amplifiers are excellent 16-bit and 18-bit, SAR ADC drivers that are high precision with low THD and noise allow for a unique power-scalable solution. This family of devices is fully characterized and specified with a 16-bit settling time of 280 ns that enables a true 16-bit effective number of bits (ENOB). Along with a high dc precision of only 100 µV offset voltage, a wide gain-bandwidth product of 120 MHz, a low wideband noise of 2.5 nV/√Hz, this family is optimized for driving high-throughput, high-resolution SAR ADCs, such as the ADS88xx family of SAR ADCs.

The OPAx625 features two operating modes: high-drive and low-power. In the innovative low-power mode, the OPAx625 tracks the input signal allowing the OPAx625 to transition from low-power mode to high-drive mode at 16-bit ENOB within 170 ns.

The OPAx625 family is available in 6-pin SOT and 10-pin VSSOP packages and is specified for operation from –40°C to +125°C.

The OPAx625 family of operational amplifiers are excellent 16-bit and 18-bit, SAR ADC drivers that are high precision with low THD and noise allow for a unique power-scalable solution. This family of devices is fully characterized and specified with a 16-bit settling time of 280 ns that enables a true 16-bit effective number of bits (ENOB). Along with a high dc precision of only 100 µV offset voltage, a wide gain-bandwidth product of 120 MHz, a low wideband noise of 2.5 nV/√Hz, this family is optimized for driving high-throughput, high-resolution SAR ADCs, such as the ADS88xx family of SAR ADCs.

The OPAx625 features two operating modes: high-drive and low-power. In the innovative low-power mode, the OPAx625 tracks the input signal allowing the OPAx625 to transition from low-power mode to high-drive mode at 16-bit ENOB within 170 ns.

The OPAx625 family is available in 6-pin SOT and 10-pin VSSOP packages and is specified for operation from –40°C to +125°C.

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