Part Number: AD8428
Function: Low Noise, Low Gain Drift, Instrumentation Amplifier
Package: 8-lead SOIC type
Manufacturer: Analog Devices
Pinouts:
Description
The AD8428 is an ultralow noise instrumentation amplifier designed to accurately measure tiny, high speed signals. It delivers industry-leading gain accuracy, noise, and bandwidth. All gain setting resistors for the AD8428 are internal to the part and are precisely matched. Care is taken in both the chip pinout and layout. This results in excellent gain drift and quick settling to the final gain value after the part is powered on. The high CMRR of the AD8428 prevents unwanted signals
from corrupting the signal of interest. The pinout of the AD8428 is designed to avoid parasitic capacitance mismatches that can degrade CMRR at high frequencies. The AD8428 is one of the fastest instrumentation amplifiers available. The circuit architectureis designed for high bandwidth
at high gain. The AD8428 uses a current feedback topology for the initial preamplifier gain stage of 200, followed by a difference amplifier stage of 10. This architecture results in a 3.5 MHz bandwidth at a gain of 2000 for an equivalent gain bandwidth product of 7 GHz.
Features
1. Fixed gain of 2000
2. Access to internal nodes provides flexibility
3. Low noise: 1.5 nV/√Hz input voltage noise
4. High accuracy dc performance
5. Gain drift: 5 ppm/°C
6. Offset drift: 0.3 μV/°C
7. Gain accuracy: 0.05%
8. CMRR: 140 dB min
9. Excellent ac specifications
10. Bandwidth: 3.5 MHz
11. Slew rate: 40 V/μs
12. Power supply range: ±4 V to ±18 V
13. ESD protection: 5000 V (HBM)
14.Temperature range for specified performance: −40°C to +85°C
Applications
1. Sensor interface
2. Medical instrumentation
3. Patient monitoring
Other data sheets are available within the file:
AD8428ARZ, AD8428ARZ-RL, AD8428BRZ, AD8428BRZ-RL
AD8428 Datasheet PDF Download
