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OPA690IDBVR

535MHz wideband voltage-feedback op-amp with disable, 1900V/µs slew rate, 215mA output in SOT-23-6

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Manufacturer Part：

OPA690IDBVR

Package：

SOT-23-6 (2.90 x 2.80 x 1.45 mm) DBV

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Description

Product Overview

The OPA690IDBVR from Texas Instruments is a wideband voltage-feedback operational amplifier with disable function in a SOT-23-6 (2.9×2.8mm) package. It offers 535MHz unity-gain bandwidth, 1900V/µs slew rate, and 215mA output current. The device operates from 5V to 12V supplies with only 6.1mA quiescent current and features an optional disable pin that reduces supply current to less than 100µA.

Key Specifications

Unity-Gain Bandwidth 535MHz (G=1)
Slew Rate 1900V/µs
Output Current 215mA
Input Noise Voltage 4.6nV/√Hz
Supply Voltage Range 5V ~ 12V (±2.5V ~ ±6V)
Quiescent Current 6.1mA (Typical)
Disable Current <100µA
Settling Time 13ns (0.1%)
Package SOT-23-6 (DBV)
Operating Temperature -40°C ~ +85°C

Features

  • Unity-gain stable with 535MHz bandwidth
  • High output current drive of 215mA
  • Ultra-fast 1900V/µs slew rate
  • Low input voltage noise of 4.6nV/√Hz
  • Low distortion: HD2/HD3 = -85/-75dBc at 5MHz
  • Disable function reduces current to <100µA
  • Output voltage swing ±3.9V on ±5V supplies

Applications

  • High-speed ADC drivers
  • Video line drivers
  • Portable imaging systems
  • Transimpedance amplifiers
  • Active filter circuits

The OPA690 represents a major step forward in unity-gain stable voltage-feedback op amps. A new input architecture provides the slew rate and full-power bandwidth previously found only in wideband current-feedback op amps. A new output stage architecture delivers 215mA of current with minimal headroom requirement. These capabilities combine to give an exceptional slew rate of 1900V/µs into a 100Ω load. The ultra-fast settling time of 13ns makes the OPA690 an excellent choice for fast sampling systems such as high-speed ADC drivers, high-speed imaging systems, and current DAC transimpedance amplifiers.

The OPA690 uses an advanced voltage-feedback architecture with two gain stages. The input stage uses a complementary differential pair that provides high slew rate by dynamically increasing the available charging current for the compensation capacitor during large signal transitions. The output stage uses a class-AB push-pull architecture capable of sourcing and sinking 215mA with minimal headroom to the supply rails. The disable function opens the output stage and biases the amplifier into a low-power state (<100µA total supply current), placing the output in a high-impedance state suitable for multiplexed signal paths.

Pin Name Function
1 -IN Inverting input
2 +VS Positive supply voltage
3 +IN Non-inverting input
4 -VS Negative supply voltage
5 OUTPUT Amplifier output
6 DIS Disable control (open or high = enabled, low = disabled)
  • High-Speed ADC Driver: 535MHz bandwidth and 13ns settling time drive 12-14 bit ADCs at >100Msps sampling rates
  • Video Line Driver: 215mA output current drives multiple 75Ω video loads with low distortion
  • Pulsed Radar Receiver: 1900V/µs slew rate handles large transient signals without slew-induced distortion
  • Multiplexed Data Acquisition: Disable function places output in Hi-Z for time-division multiplexed signal routing
Model Manufacturer Key Difference
OPA691IDBVR TI Current-feedback version, higher bandwidth
ADA4899-1 ADI 600MHz, 1nV/√Hz noise, no disable
THS3091D TI 210MHz, 115mA output, SOIC-8
LMH6609 TI 320MHz, 85mA, SOT-23-6
AD8056 ADI Dual channel, 300MHz, SOIC-8
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