INA827 Datasheet, PDF (1/29 Pages) Texas Instruments – Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier with a Minimum Gain of 5

INA827
www.ti.com
SBOS631 – JUNE 2012
Wide Supply Range, Rail-to-Rail Output
Instrumentation Amplifier with a Minimum Gain of 5
Check for Samples: INA827
FEATURES
1
•23 Eliminates Errors from External Resistors at
Gain of 5
• Common-Mode Range Goes Below
Negative Supply
• Input Protection: Up to ±40 V
• Rail-to-Rail Output
• Outstanding Precision:
– Common-Mode Rejection: 88 dB, min
– Low Offset Voltage: 150 µV, max
– Low Drift: 2.5 µV/°C, max
– Low Gain Drift: 1 ppm/°C, max (G = 5 V/V)
– Power-Supply Rejection:
100 dB, min (G = 5)
– Noise: 17 nV/√Hz, G = 1000 V/V
• High Bandwidth:
– G = 5: 600 kHz
– G = 100: 150 kHz
• Supply Current: 200 µA, typ
• Supply Range:
– Single Supply: +2.7 V to +36 V
– Dual Supply: ±1.35 V to ±18 V
• Specified Temperature Range:
–40°C to +125°C
• Package: MSOP-8
APPLICATIONS
• Industrial Process Controls
• Multichannel Systems
• Power Automation
• Weigh Scales
• Medical Instrumentation
• Data Acquisition
DESCRIPTION
The INA827 is a low-cost instrumentation amplifier
(INA) that offers extremely low power consumption
and operates over a very wide single- or dual-supply
range. The device is optimized for the lowest possible
gain drift of only 1 ppm per degree Celsius in G = 5,
which requires no external resistor. However, a single
external resistor sets any gain from 5 to 1000.
The INA827 is optimized to provide excellent
common-mode rejection ratio (CMRR) of over 88 dB
(G = 5) over frequencies up to 5 kHz. In G = 5,
CMRR exceeds 88 dB across the full input common-
mode range from the negative supply all the way up
to 1 V of the positive supply. Using a rail-to-rail
output, the INA827 is well-suited for low-voltage
operation from a 2.7 V single-supply as well as dual
supplies up to ±18 V. Additional circuitry protects the
inputs against overvoltage of up to ±40 V beyond the
power supplies by limiting the input currents to a save
level.
The INA827 is available in a small MSOP-8 package
and is specified for the –40°C to +125°C temperature
range. For a similar instrumentation amplifier with a
gain range of 1 V/V to 1000 V/V, see the INA826.
V+
0.1 mF
R_S(1)
1
-IN
2
R_G
3
R_S(1)
4
+IN
A₁
8 kW
8 kW
A₂
8
50 kW
50 kW
50 kW
A₃
50 kW
Device
V_O = G ´ (V_IN+ - V_IN-)
G = 5 + ^{80 kW}
R_G
7
6
REF
+
Load ^VO
-
5 _{0.1 mF}
V-
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PhotoMOS is a registered trademark of Panasonic Electric Works Europe AG.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated