INA828 Datasheet, PDF (1/33 Pages) Texas Instruments – 50-uV Offset, 7-nV Noise, Low-Power, Precision Instrumentation Amplifier

Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
INA828
SBOS792 – AUGUST 2017
INA828 50-µV Offset, 7-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier
1 Features
•1 Precision Instrumentation Amplifier Evolution:
– Second Generation: INA828
– First Generation: INA128
• Low Offset Voltage: 50 µV, MAX
• Gain Drift: 5 ppm/°C (G = 1), 50 ppm/°C (G > 1)
• Noise: 7 nV/√Hz
• Bandwidth: 2.0 MHz (G = 1), 260 kHz (G = 100)
• Stable with 1-nF capacitive loads
• Inputs Protected Up to ±40 V
• Common-Mode Rejection:
– 110 dB, MIN (G = 10)
• Power-Supply Rejection: 100 dB, MIN (G = 1)
• Supply Current: 650 µA, MAX
• Supply Range:
– Single Supply: 4.5 V to 36 V
– Dual Supply: ±2.25 V to ±18 V
• Specified Temperature Range:
–40°C to +125°C
• Package: 8-Pin SOIC
2 Applications
• Industrial Process Controls
• Circuit Breakers
• Battery Testers
• ECG Amplifiers
• Power Automation
• Medical Instrumentation
• Portable Instrumentation
3 Description
The INA828 is a high-precision instrumentation
amplifier that offers low power consumption and
operates over a very wide single- or dual-supply
range. A single external resistor sets any gain from 1
to 1000. The device offers excellent precision due to
the use of new super-beta input transistors which
provide exceptionally low input offset voltage, offset
voltage drift, input bias current, and input voltage and
current noise. Additional circuitry protects the inputs
against overvoltage up to ±40 V.
The INA828 is optimized to provide excellent
common-mode rejection ratio. At G = 1, the common-
mode rejection ratio exceeds 90 dB across the full
input common-mode range. The device is well-suited
for low-voltage operation from a 5-V single supply as
well as dual supplies up to ±18 V. Finally, INA828 is
available in an 8-pin SOIC package and specified
over the –40°C to +125°C temperature range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA828
SOIC (8)
4.90 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
INA828 Simplified Internal Schematic
+VS
Over-
-IN
Voltage
+
Protection
RG
±
40 k
40 k
25 k
±
OUT
25 k
+
RG
±
Over-
+IN
Voltage
+
Protection
40 k
40 k
REF
-VS
Copyright © 2017, Texas Instruments Incorporated
Typical Distribution of Input Offset Voltage Drift
4500
4000
3500
3000
2500
2000
1500
1000
500
0
Input Offset Voltage Drift ( V/ƒC)
C001
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.