Overview
The AD846AN UT, produced by Analog Devices Inc., is a high-performance operational amplifier that utilizes Analog Devices' junction isolated complementary bipolar (CB) process. This amplifier is known for its exceptional speed and precision, making it suitable for a variety of high-speed applications. It is characterized by its ultra-low offset voltage, high slew rate, and fast settling times, which are critical for maintaining high accuracy in both AC and DC parameters.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Offset Voltage | 25 | - | 200 | µV |
| Input Offset Drift | 0.8 | 3.5 | 5.5 | µV/°C |
| Slew Rate | - | 450 | - | V/µs |
| Small Signal Bandwidth | - | 80 | - | MHz (AV = –1) |
| Full Power Bandwidth | - | 6.8 | - | MHz at 20 V p-p, RL = 500 Ω |
| Settling Time (10 V Step) | - | 110 ns | - | to 0.01% |
| Differential Gain | - | <0.01% | - | @ 4.4 MHz |
| Differential Phase | - | <0.028° | - | @ 4.4 MHz |
| Total Harmonic Distortion (THD) | - | 0.0005% | - | @ 100 kHz |
| Quiescent Supply Current | - | 6.5 | - | mA |
Key Features
- High Speed Performance: The AD846AN UT boasts a slew rate of 450 V/µs and a small signal bandwidth of 80 MHz, making it ideal for high-speed applications.
- Precision: It achieves true “12-bit” (0.01%) precision on critical AC and DC parameters.
- Low Distortion: The amplifier features low differential gain and phase, along with minimal total harmonic distortion (THD), ensuring high signal integrity.
- Fast Settling Times: It settles to 0.01% in 110 ns for a 10 V step, which is crucial for applications requiring quick response times.
- Low Input Offset Voltage: The input offset voltage is as low as 25 µV, contributing to its high precision.
- Robust Packaging Options: Available in plastic mini-DIP and hermetic cerdip packages, with military-grade options (AD846S) rated over the full military temperature range of –55°C to +125°C.
Applications
- High Speed DAC Buffers: Ideal for buffering high-speed digital-to-analog converters.
- Flash ADC Buffers: Suitable for buffering flash analog-to-digital converters.
- Coaxial Cable Drivers: Used for driving coaxial cables due to its high slew rate and low distortion.
- High Performance Audio Circuitry: Employed in high-performance audio applications requiring low noise and high fidelity.
- Video Line Drivers: Well-suited for video line driving applications where low distortion and high slew rate are essential.
Q & A
- What is the slew rate of the AD846AN UT?
The slew rate of the AD846AN UT is 450 V/µs.
- What is the small signal bandwidth of the AD846AN UT?
The small signal bandwidth is 80 MHz for a gain of –1.
- What are the typical settling times for the AD846AN UT?
The settling time is 110 ns to 0.01% for a 10 V step.
- What is the input offset voltage of the AD846AN UT?
The input offset voltage is as low as 25 µV.
- What are the packaging options for the AD846AN UT?
It is available in plastic mini-DIP and hermetic cerdip packages.
- Is the AD846AN UT suitable for military applications?
Yes, the AD846S version is rated over the full military temperature range of –55°C to +125°C and is available processed to MIL-STD-883B, Rev C.
- What are some common applications of the AD846AN UT?
Common applications include high-speed DAC buffers, flash ADC buffers, coaxial cable drivers, high-performance audio circuitry, and video line drivers.
- How does the AD846AN UT handle supply decoupling?
Adequate supply decoupling is crucial; a 2.2 µF tantalum capacitor in parallel with a 0.1 µF to 0.01 µF ceramic disc capacitor is recommended, placed close to the power supply pins.
- What is the quiescent supply current of the AD846AN UT?
The quiescent supply current is 6.5 mA maximum.
- Does the AD846AN UT have any special screening options?
Yes, extended reliability PLUS screening is available, which includes 168 hour burn-in and other environmental and physical tests.
