Features: Lowest auto-zero amplifier noise
Low Offset Voltage: 5 V
Input Offset Drift: 0.03 V/°C
Rail-to-Rail Input and Output Swing
5 V Single-Supply Operation
High Gain, CMRR, and PSRR: 120 dB
Very Low Input Bias Current: 100 pA
Low Supply Current: 1.3 mA
Overload Recovery Time: 0.2 ms
No External Components RequiredApplicationAutomotive Sensors
Pressure and Position Sensors
Strain Gage Amplifiers
Medical Instrumentation
Thermocouple AmplifiersPinout
Specifications
| -3dB Bandwidth |
2.5MHz |
| Slew Rate |
1V/s |
| Vos |
1V |
| Ib |
30pA |
| Input Noise (nV/rtHz) |
22nV/rtHz |
| Vcc-Vee Supply (V) |
2.7 to 6 |
| Iq per Amplifier |
1.1mA |
| # OpAmps per Pkg |
1 |
| Operating Temp Range |
-40 to +125 |
| Packages |
SOIC,SOT |
Supply Voltage ..........................................................................+6V
Input Voltage........................................................GND to Vs + 0.3V
Differential Input Voltage1 ....................................................±5.0V
Output Short-Circuit Duration to Gnd................................Indefinite
Storage Temperature Range
RT, R Package ........................................... -65°C to +150°C
Operating Temperature Range
AD8628 ..................................................... -40°C to +125°C
Junction Temperature Range
RT, R Package ............................................ -65°C to +150°C
Lead Temperature Range (Soldering, 10 sec).....................+300°CDescriptionThis new family of amplifiers has ultra-low offset, drift and bias current. The AD8628 is a wide bandwidth auto-zero amplifier featuring rail-to-rail input and output swings and low noise. Operation is fully specified from 2.7 to 5 volts single supply (±1.35V to ±2.5V dual supply).
The AD8628 family provides the benefits previously found only in expensive auto-zeroing or chopper-stabilized amplifiers. Using Analog Devices' new topology these zero-drift amplifiers combine low cost, with high accuracy and low noise. (No external capacitors are required.) In addition, the AD8628 greatly reduces the digital switching noise found in most chopper stabilized amplifiers.
With an offset voltage of only 1V, drift less than 0.005 V/°C and noise of only 0.5uV P-P (0Hz to 10 Hz) the AD8628 is perfectly suited for applications where error sources cannot be tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. Many systems may take advantage of the rail-to-rail input and output swings provided by the AD8628 family to reduce input biasing complexity and maximize SNR.
The AD8628 family is specified for the extended industrial (-40° to +125°C) temperature range. The AD8628 amplifier is available in the tiny SOT23 and the popular 8-pin narrow SOIC plastic packages.
AD8628 Data Sheet
