Overview
The AD8251ARMZ, produced by Analog Devices Inc., is a highly versatile instrumentation amplifier with digitally programmable gains. This device is designed to offer exceptional performance in terms of input impedance, noise, and distortion, making it ideal for interfacing with sensors and driving high sample rate analog-to-digital converters (ADCs). The AD8251 features a high bandwidth of 10 MHz, low total harmonic distortion (THD) of −110 dB, and a fast settling time of 785 ns to 0.001%. It is available in a compact 10-lead MSOP package and operates over a temperature range of −40°C to +85°C, making it suitable for a variety of applications where size and packing density are critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Programmable Gains | 1, 2, 4, 8 | - |
| Bandwidth | 10 MHz | - |
| Input Impedance | GΩ | - |
| Total Harmonic Distortion (THD) | −110 dB at 1 kHz, 10 V swing | - |
| Settling Time | 785 ns to 0.001% | - |
| Slew Rate | 20 V/μs | - |
| Common Mode Rejection Ratio (CMRR) | 98 dB (minimum), G = 8 | - |
| Gain Drift | 10 ppm/°C (maximum), G = 8 | - |
| Offset Drift | 1.8 μV/°C (maximum), G = 8 | - |
| Supply Voltage Range | ±5 V to ±15 V | - |
| Operating Temperature Range | −40°C to +85°C | - |
| Package Type | 10-lead MSOP | - |
| Quiescent Current | 4 mA | - |
Key Features
- Digitally programmable gains of 1, 2, 4, and 8
- High input impedance (GΩ)
- Low output noise (18 nV/√Hz at G = 10)
- Low distortion (−110 dB THD at 1 kHz, 10 V swing)
- Fast settling time (785 ns to 0.001%) and high slew rate (20 V/μs)
- High common-mode rejection ratio (CMRR) of 98 dB at G = 8
- Low gain drift (10 ppm/°C) and offset drift (1.8 μV/°C) at G = 8
- Wide supply voltage range (±5 V to ±15 V)
- Compact 10-lead MSOP package
- Operating temperature range of −40°C to +85°C
Applications
- Data acquisition systems
- Medical instrumentation
- Industrial process controls
- Bridge amplifiers and strain gages
- Smart Industry and Instrumentation applications
- Electrification and Digital Health applications
Q & A
- What are the programmable gain settings of the AD8251?
The AD8251 has programmable gains of 1, 2, 4, and 8.
- What is the bandwidth of the AD8251?
The bandwidth of the AD8251 is 10 MHz.
- What is the input impedance of the AD8251?
The input impedance of the AD8251 is GΩ.
- What is the total harmonic distortion (THD) of the AD8251?
The THD of the AD8251 is −110 dB at 1 kHz, 10 V swing.
- What is the settling time of the AD8251?
The settling time of the AD8251 is 785 ns to 0.001%.
- What is the slew rate of the AD8251?
The slew rate of the AD8251 is 20 V/μs.
- What is the common-mode rejection ratio (CMRR) of the AD8251?
The CMRR of the AD8251 is 98 dB (minimum) at G = 8.
- What is the gain drift and offset drift of the AD8251?
The gain drift is 10 ppm/°C and the offset drift is 1.8 μV/°C at G = 8.
- What is the supply voltage range of the AD8251?
The supply voltage range of the AD8251 is ±5 V to ±15 V.
- What is the operating temperature range of the AD8251?
The operating temperature range of the AD8251 is −40°C to +85°C.
