Features: Improved Replacement for:
INA117P and INA117KU
270 V Common-Mode Voltage Range
Input Protection to:
±500 V Common Mode
±500 V Differential
Wide Power Supply Range (2.5 V to 18 V)
±10 V Output Swing on 12 V Supply
1 mA Max Power Supply Current
HIGH ACCURACY DC PERFORMANCE
3 ppm Max Gain Nonlinearity
20 V/C Max Offset Drift (AD629A)
10 V/C Max Offset Drift (AD629B)
10 ppm/C Max Gain Drift
EXCELLENT AC SPECIFICATIONS
77 dB Min CMRR @ 500 Hz (AD629A)
86 dB Min CMRR @ 500 Hz (AD629B)
500 kHz Bandwidth
ApplicationHigh Voltage Current Sensing
Battery Cell Voltage Monitor
Power Supply Current Monitor
Motor Control
IsolationPinout
Specifications
| Single/Dual Supply |
Dual |
| Voltage Supply (Vmax) |
±18V |
| Gain Setting Method |
fixed |
| Gain Range (min to max) |
1 |
| Bandwidth G=10 (kHz typ) |
500kHz |
| CMRR (dB) |
77dB |
| Vnoise RTI 1-10 Hz Vp-p |
15V p-p |
| Temperature Range |
-40 to +85 |
| Gain Error (%) max |
+0.01% |
| Supply Current |
1mA |
| Package |
DIP,SOIC |
| Vosi (V) |
1000V |
Supply Voltage VS . . . . . . . . . . . . . . . . . . . . . .. . . .. . . . . . . ±18 V
Internal Power Dissipation2
DIP (N) . . . . . . . . . . . . . . . . . . . . .. . . .. . . .. . . See Derating Curves
SOIC (R) . . . . . . . . . . . . . . . . . . . . . .. . . .. . . . . See Derating Curves
Input Voltage Range, Continuous . . . . . . . .. . . .. . . . . . . . . ±300 V
Common-Mode and Differential, 10 sec . . . .. . . .. . . .. . . . . . ±500 V
Output Short Circuit Duration . . . . . . . . . . . .. . . .. . . . . . . . Indefinite
Pin 1, Pin 5 . . . . . . . . . . . . . . . .. . . .. . . VS 0.3 V to +VS + 0.3 V
Maximum Junction Temperature . . . . . . . .. . . .. . . . . . . . . . . 150°C
Operating Temperature Range . . . . . . . . . .. . . ..55°C to +125°C
Storage Temperature Range . . . . . . . . . . .. . . .. 65°C to +150°C
Lead Temperature Range (Soldering 60 sec) . . . . .. . . .... . . . 300°CDescriptionThe AD629 is a difference amplifier with a very high input common-mode voltage range. It is a precision device that allows the user to accurately measure differential signals in the presence of high common-mode voltages up to ±270 V.
The AD629 can replace costly isolation amplifiers in applications that do not require galvanic isolation. The device will operate over a ±270 V common-mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±500 V.
The AD629 has low offset, low offset drift, low gain error drift, as well as low common-mode rejection drift, and excellent CMRR over a wide frequency range.
The AD629 is available in low-cost, plastic 8-lead DIP and SOIC packages. For all packages and grades, performance is guaranteed over the entire industrial temperature range from 40°C to +85°C.
AD629 Data Sheet
