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AD829:  High Speed, Low Noise Video Op Amp

The AD829 is a low noise (1.7 nV/√Hz), high speed op amp with custom compensation that provides the user with gains of 1 to 20 while maintaining a bandwidth >50 MHz. Its 0.04° differential phase and 0.02% differential gain performance at 3.58 MHz and 4.43 MHz, driving reverse-terminated 50 Ω or 75 Ω cables, makes it ideally suited for professional video applications. The AD829 achieves its 230 ...More

AD829:  High Speed, Low Noise Video Op Amp

Product Description

The AD829 is a low noise (1.7 nV/√Hz), high speed op amp with custom compensation that provides the user with gains of 1 to 20 while maintaining a bandwidth >50 MHz. Its 0.04° differential phase and 0.02% differential gain performance at 3.58 MHz and 4.43 MHz, driving reverse-terminated 50 Ω or 75 Ω cables, makes it ideally suited for professional video applications. The AD829 achieves its 230 V/μs uncompensated slew rate and 750 MHz gain bandwidth while requiring only 5 mA of current from power supplies.

The external compensation pin of the AD829 gives it exceptional versatility. For example, compensation can be selected to optimize the bandwidth for a given load and power supply voltage. As a gain-of-2 line driver, the −3 dB bandwidth can be increased to 95 MHz at the expense of 1 dB of peaking. Its output can also be clamped at its external compensation pin. The AD829 exhibits excellent dc performance. It offers a minimum open-loop gain of 30 V/mV into loads as low as 500 Ω, a low input voltage noise of 1.7 nV/√Hz, and a low input offset voltage of 1 mV maximum. Common-mode rejection and power supply rejection ratios are both 120 dB.

This op amp is also useful in multichannel, high speed data conversion where its fast (90 ns to 0.1%) settling time is important. In such applications, the AD829 serves as an input buffer for 8-bit to 10-bit ADCs and as an output I/V converter for high speed DACs.

Operating as a traditional voltage feedback amplifier, the AD829 provides many of the advantages that a transimpedance amplifier offer. A bandwidth >50 MHz can be maintained for a range of gains through the replacement of the external compensation capacitor. The AD829 and the transimpedance amplifier are both unity-gain stable and provide similar voltage noise performance (1.7 nV/√Hz); however, the current noise of the AD829 (1.5 pA/√Hz) is less than 10% of the noise of transimpedance amplifiers. The inputs of the AD829 are symmetrical.

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  • High Speed
    120 MHz bandwidth, gain = −1
    230 V/μs slew rate
    90 ns settling time to 0.1%
  • Ideal for video applications
    0.02% differential gain
    0.04° differential phase
  • Low noise
    1.7 nV/√Hz input voltage noise
    1.5 pA/√Hz input current noise
  • Excellent dc precision
    1 mV maximum input offset voltage (over temperature)
    0.3 μV/°C input offset drift
  • Flexible operation
    Specified for ±5 V to ±15 V operation
    ±3 V output swing into a 150 Ω load
    External compensation for gains 1 to 20
    5 mA supply current
  • Available in tape and reel in accordance with EIA-481A standard
  • Iq per Amplifier: 6.5mA
  • # OpAmps per Pkg: 1
  • Operating Temp Range: -55 to +125
  • Packages: DIP,LCC,SOIC
  • -3dB Bandwidth: 120MHz
  • Slew Rate: 230V/µs
  • Vos: 200µV
  • Ib: 3.3µA
  • Input Noise (nV/rtHz): 1.7nV/rtHz
  • Vcc-Vee Supply (V): 9.6 to 36

AD829 Pin Configuration Diagram

Similar Products

arrow View Full Interactive Product Selection Table
Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
AD829 120MHz 230V/µs 200µV 3.3µA 1.7nV/rtHz 1 -55 to +125
AD8099 500MHz 1.6KV/µs 200µV 3µA 950pV/rtHz 1 -40 to +125
ADA4899-1 600MHz 310V/µs 35µV 100nA 1nV/rtHz 1 -40 to +125
AD811 140MHz 2.5KV/µs 500µV 2µA 1.9nV/rtHz 1 -55 to +125
AD810 80MHz 1KV/µs 1.5mV 2µA 2.9nV/rtHz 1 -55 to +125
AD847 50MHz 300V/µs 500µV 3.3µA 15nV/rtHz 1 -55 to +125
AD8067 54MHz 640V/µs 200µV 600fA 6.6nV/rtHz 1 -40 to +85
OP27 8MHz 2.8V/µs 30µV 15nA 3.2nV/rtHz 1 -55 to +125
OP97 900KHz 200mV/µs 30µV 30pA 14nV/rtHz 1 -55 to +125
OP77 600KHz 300mV/µs 50µV 1.2nA 9.8nV/rtHz 1 -55 to +125
ADA4898-1 65MHz 55V/µs 20µV 100nA 900pV/rtHz 1 -40 to +105
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  • Military : -55 to +125 degrees Celsius
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.