INA826 Datasheet, PDF (23/39 Pages) Texas Instruments – Precision, 200-μA Supply Current, 2.7-V to 36-V Supply Instrumentation Amplifier with Rail-to-Rail Output

INA826
www.ti.com
SBOS562A – AUGUST 2011 – REVISED SEPTEMBER 2011
OPERATING VOLTAGE
The INA826 operates over a power-supply range of +2.7 V to +36 V (±1.35 V to ±18 V). Supply voltages higher
than 40 V (±20 V) can permanently damage the device. Parameters that vary over supply voltage or temperature
are shown in the Typical Characteristics section of this data sheet.
Low-Voltage Operation
The INA826 can operate on power supplies as low as ±1.35 V. Most parameters vary only slightly throughout this
supply voltage range; see the Typical Characteristics section. Operation at very low supply voltage requires
careful attention to assure that the input voltages remain within the linear range. Voltage swing requirements of
internal nodes limit the input common-mode range with low power-supply voltage. The typical characteristic
curves Typical Common-Mode Range vs Output Voltage (Figure 9 to Figure 16) and Offset Voltage vs
Common-Mode Voltage (Figure 41 to Figure 44) describe the range of linear operation for various supply
voltages, reference connections, and gains.
ERROR SOURCES
Most modern signal conditioning systems calibrate errors at room temperature. However, calibration of errors
that result from a change in temperature is normally difficult and costly. Therefore, it is important to minimize
these errors by choosing high-precision components such as the INA826 that have improved specifications in
critical areas that impact the precision of the overall system. Figure 63 shows an example application.
R_S+ = 10 kW
+15 V
V_DIFF = 1 V
5.49 kW
Device
REF
V_OUT
V_CM = 10 V
R_S- = 9.9 kW
Signal Bandwidth: 5 kHz
- 15 V
Figure 63. Example Application with G = 10 V/V and 1-V Differential Voltage
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): INA826
Submit Documentation Feedback
23