|
INA128_15 Datasheet, PDF (1/29 Pages) Texas Instruments – INA12x Precision, Low Power Instrumentation Amplifiers | |||
|
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
INA128, INA129
SBOS051C â OCTOBER 1995 â REVISED OCTOBER 2015
INA12x Precision, Low Power Instrumentation Amplifiers
1 Features
â¢1 Low Offset Voltage: 50 μV Maximum
⢠Low Drift: 0.5 μV/°C Maximum
⢠Low Input Bias Current: 5 nA Maximum
⢠High CMR: 120 dB minimum
⢠Inputs Protected to ±40 V
⢠Wide Supply Range: ±2.25 V to ±18 V
⢠Low Quiescent Current: 700 μA
⢠8-PIN Plastic Dip, SO-8
2 Applications
⢠Bridge Amplifier
⢠Thermocouple Amplifier
⢠RTD Sensor Amplifier
⢠Medical Instrumentation
⢠Data Acquisition
3 Description
The INA128 and INA129 are low-power, general
purpose instrumentation amplifiers offering excellent
accuracy. The versatile 3-op amp design and small
size make these amplifiers ideal for a wide range of
applications. Current-feedback input circuitry provides
wide bandwidth even at high gain (200 kHz at G =
100).
A single external resistor sets any gain from 1 to
10,000. The INA128 provides an industry-standard
gain equation; the INA129 gain equation is
compatible with the AD620.
The INA12x is laser-trimmed for very low offset
voltage (50 μV), drift (0.5 μV/°C) and high common-
mode rejection (120 dB at G ⥠100). The INA12x
operates with power supplies as low as ±2.25 V, and
quiescent current is only 700 μA, ideal for battery-
operated systems. Internal input protection can
withstand up to ±40 V without damage.
The INA12x is available in 8-pin plastic DIP and SO-8
surface-mount packages, specified for the â40°C to
85°C temperature range. The INA128 is also
available in a dual configuration, the INA2128.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA128
INA129
SOIC (8)
PDIP (8)
3.91 mm à 4.9 mm
6.35 mm à 9.81 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
â
VIN
2 Over-Voltage
Protection
1
RG
8
+
3 Over-Voltage
VIN
Protection â¦
Simplified Schematic
V+
7
INA128, INA129
A1
25k (1)
40kâ¦
25kâ¦(1)
A2
40kâ¦
40kâ¦
6
A3
5
40kâ¦
INA128:
G = 1 + 50kâ¦
RG
INA129:
G = 1 + 49.4kâ¦
RG
VO
Ref
4
NOTE: (1) INA129: 24.7kâ¦
Vâ
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.
|
▷ |