Overview
The AD810AR, produced by Analog Devices Inc., is a composite and HDTV-compatible, current feedback, video operational amplifier. It is designed for high-performance video and data acquisition systems, making it ideal for applications such as multimedia, digital tape recorders, and video cameras. The AD810AR is notable for its low power consumption, with a maximum supply current of 8.0 mA, and a power-down mode that reduces the supply current to 2.1 mA to conserve power. The amplifier operates over a wide power supply range of ±5 V to ±15 V and features a high-speed bandwidth of up to 80 MHz at unity gain.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| 3 dB Bandwidth (G = +2) | VS = ±5 V, RFB = 715 Ω | 40 | 50 | 50 | MHz |
| 3 dB Bandwidth (G = +2) | VS = ±15 V, RFB = 715 Ω | 55 | 75 | 75 | MHz |
| 3 dB Bandwidth (G = +1) | VS = ±15 V, RFB = 1000 Ω | 40 | 80 | 80 | MHz |
| 0.1 dB Bandwidth (G = +2) | VS = ±5 V, RFB = 715 Ω | 13 | 22 | 22 | MHz |
| 0.1 dB Bandwidth (G = +2) | VS = ±15 V, RFB = 715 Ω | 15 | 30 | 30 | MHz |
| Slew Rate | RL = 150 Ω, VS = ±5 V | 350 | 350 | 350 | V/µs |
| Slew Rate | RL = 400 Ω, VS = ±15 V | 1000 | 1000 | 1000 | V/µs |
| Differential Gain | G = +2, RL = 150 Ω | 0.02% | |||
| Differential Phase | G = +2, RL = 150 Ω | 0.04° | |||
| Input Voltage Noise | 2.9 nV/√Hz | ||||
| Supply Current | VS = ±15 V | 8.0 mA | 8.0 mA | ||
| Supply Current (Power-Down Mode) | VS = ±15 V | 2.1 mA | 2.1 mA |
Key Features
- High-speed bandwidth: Up to 80 MHz at unity gain (G = +1) and 75 MHz at a gain of +2.
- Low differential gain and phase errors: 0.02% and 0.04° respectively, making it suitable for broadcast quality video systems.
- Low power consumption: Maximum supply current of 8.0 mA and a power-down mode that reduces the supply current to 2.1 mA.
- Flexible power supply range: Specified for operation over ±5 V to ±15 V.
- High performance disable function: Turn-off time of 100 ns and break before make guaranteed, with input to output isolation of 64 dB in the off state.
- Low noise: Input voltage noise of 2.9 nV/√Hz, suitable for wide dynamic range applications.
- Ability to drive capacitive loads: Can drive loads exceeding 1000 pF directly without oscillation.
Applications
- Professional video cameras: Ideal for power-sensitive applications requiring high video quality.
- Multimedia systems: Suitable for various multimedia applications due to its high-speed and low noise characteristics.
- NTSC, PAL & SECAM compatible systems: Compatible with various video standards, making it versatile for different broadcast systems.
- Video line driver: Offers outstanding performance at closed-loop gains of 1 or greater.
- ADC/DAC buffer: Works well as a buffer in video systems due to its high bandwidth and low noise.
- DC restoration circuits: Can be used in DC restoration circuits due to its high accuracy and stability.
Q & A
- What is the maximum bandwidth of the AD810AR at unity gain?
The AD810AR has a maximum bandwidth of 80 MHz at unity gain (G = +1).
- What are the differential gain and phase errors of the AD810AR?
The differential gain and phase errors are 0.02% and 0.04° respectively.
- What is the power consumption of the AD810AR in normal and power-down modes?
The AD810AR consumes a maximum of 8.0 mA in normal operation and 2.1 mA in power-down mode.
- What is the power supply range for the AD810AR?
The AD810AR is specified for operation over a power supply range of ±5 V to ±15 V.
- How quickly can the AD810AR be disabled?
The turn-off time is about 100 ns, and the break before make is guaranteed.
- What is the input voltage noise of the AD810AR?
The input voltage noise is 2.9 nV/√Hz.
- Can the AD810AR drive capacitive loads?
Yes, the AD810AR can drive capacitive loads exceeding 1000 pF directly without oscillation).
- What are some common applications of the AD810AR?
Common applications include professional video cameras, multimedia systems, NTSC, PAL & SECAM compatible systems, video line drivers, ADC/DAC buffers, and DC restoration circuits).
- How does the AD810AR handle high impedance loads?
For high impedance loads, adding an extra load (e.g., 150 Ω) at the amplifier output can restore input to output isolation to the 65 dB level).
- What is the slew rate of the AD810AR?
The slew rate is 350 V/µs for a load resistance of 150 Ω with ±5 V supplies, and 1000 V/µs for a load resistance of 400 Ω with ±15 V supplies).
