Instrumentation Amplifier. INA321 Datasheet

INA321 Datasheet PDF


Part Number

INA321

Description

CMOS Instrumentation Amplifier

Manufacture

Burr-Brown

Total Page 23 Pages
Datasheet
Download INA321 Datasheet



INA321
INA321
INA2321
SBOS168D − DECEMBER 2000 − REVISED JANUARY 2006
microPower, Single-Supply, CMOS
Instrumentation Amplifier
FEATURES
D LOW QUIESCENT CURRENT: 40µA/channel
Shut Down: < 1µA
D HIGH GAIN ACCURACY: G = 5, 0.02%,
2ppm/°C
D GAIN SET WITH EXTERNAL RESISTORS
D LOW OFFSET VOLTAGE: ±200µV
D HIGH CMRR: 94dB
D LOW BIAS CURRENT: 10pA
D BANDWIDTH: 500kHz, G = 5V/V
D RAIL-TO-RAIL OUTPUT SWING: (V+) − 0.02V
D WIDE TEMPERATURE RANGE:
−55°C to +125°C
D SINGLE VERSION IN MSOP-8 PACKAGE AND
DUAL VERSION IN TSSOP-14 PACKAGE
DESCRIPTION
The INA321 family is a series of rail-to-rail output,
micropower CMOS instrumentation amplifiers that offer
wide-range, single-supply, as well as bipolar-supply
operation. The INA321 family provides low-cost, low-noise
amplification of differential signals with micropower
current consumption of 40µA. When shutdown, the
INA321 has a quiescent current of less than 1µA.
Returning to normal operations within microseconds, the
shutdown feature makes the INA321 optimal for
low-power battery or multiplexing applications.
Configured internally for 5V/V gain, the INA321 offers
exceptional flexibility with user-programmable external
gain resistors. The INA321 reduces common-mode error
over frequency and with CMRR remaining high up to 3kHz,
line noise and line harmonics are rejected.
The low-power design does not compromise on bandwidth
or slew rate, making the INA321 ideal for driving sample
Analog-to-Digital (A/D) converters as well as
general-purpose applications. With high precision, low
cost, and small packaging, the INA321 outperforms
discrete designs, while offering reliability and
performance.
APPLICATIONS
D INDUSTRIAL SENSOR AMPLIFIERS:
Bridge, RTD, Thermistor, Position
D PHYSIOLOGICAL AMPLIFIERS:
ECG, EEG, EMG
D A/D CONVERTER SIGNAL CONDITIONING
D DIFFERENTIAL LINE RECEIVERS WITH GAIN
D FIELD UTILITY METERS
D PCMCIA CARDS
D COMMUNICATION SYSTEMS
D TEST EQUIPMENT
D AUTOMOTIVE INSTRUMENTATION
120
100
80
60
40
10
CMRR vs FREQUENCY
INA321
Nearest
Competition
10x
Im provement
100 1k
Frequency (Hz)
10k
REF
VIN
VIN+
R1
160k40k
40k
RG R2
160k
A1
Shutdown
A3
A2
Gain = 5 + 5(R2/R1)
VOUT = (VIN+ VIN) Gain
V+ V
VOUT
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2000-2006, Texas Instruments Incorporated
www.ti.com

INA321
INA321
INA2321
SBOS168D − DECEMBER 2000 − REVISED JANUARY 2006
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage, V+ to V− . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5V
Signal Input Terminals Voltage(2) . . . (V−) − (0.5V) to (V+) + (0.5V)
Current(2) . . . . . . . . . . . . . . . . . . . . . 10mA
Output Short-Circuit(3) . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
(1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods
may degrade device reliability. These are stress ratings only, and
functional operation of the device at these or any other conditions
beyond those specified is not supported.
(2) Input terminals are diode-clamped to the power-supply rails.
Input signals that can swing more than 0.5V beyond the supply
rails should be current limited to 10mA or less.
(3) Short-circuit to ground, one amplifier per package.
www.ti.com
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instruments
recommends that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and installation
procedures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION(1)
PRODUCT
PACKAGE-LEAD
PACKAGE
DESIGNATOR
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER
TRANSPORT
MEDIA, QUANTITY
SINGLE
INA321E
MSOP-8
DGK
−55°C to +125°C
C21
INA321E/250
INA321E/2K5
Tape and Reel, 250
Tape and Reel, 2500
INA321EA
MSOP-8
DGK
−55°C to +125°C
C21
INA321EA/250 Tape and Reel, 250
″ ″ INA321EA/2K5 Tape and Reel, 3000
DUAL
INA2321EA
TSSOP-14
PW −55°C to +125°C INA2321EA INA2321EA/250 Tape and Reel, 250
″ ″ ″ INA2321EA/2K5 Tape and Reel, 2500
(1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.
PIN CONFIGURATIONS
Top View
INA321
RG 1
VIN2
VIN+ 3
V4
8 Shutdown
7 V+
6 VOUT
5 REF
MSOP−8 (E, EA)
RGA 1
VINA
VIN+A
V
2
3
4
VIN+B
VINB
RGB
5
6
7
INA2321
14 Shutdown A
13 VOUTA
12 REFA
11 V+
10 REFB
9 VOUTB
8 Shutdown B
Dual, TSSOP−14 (EA)
2




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