INA321
INA2321
SBOS168B 鈭?DECEMBER 2000 鈭?REVISED JULY 2004
microPower,
Single-Supply, CMOS
Instrumentation Amplifier
FEATURES
D
LOW QUIESCENT CURRENT: 40碌A/channel
D
D
D
D
D
D
D
D
D
Shut Down: < 1碌A
HIGH GAIN ACCURACY: G = 5, 0.02%,
2ppm/擄C
GAIN SET WITH EXTERNAL RESISTORS
LOW OFFSET VOLTAGE:
鹵200碌V
HIGH CMRR: 94dB
LOW BIAS CURRENT: 10pA
BANDWIDTH: 500kHz, G = 5V/V
RAIL-TO-RAIL OUTPUT SWING: (V+) 鈭?0.02V
WIDE TEMPERATURE RANGE:
鈭?5擄C to +125擄C
SINGLE VERSION IN MSOP-8 PACKAGE AND
DUAL VERSION IN TSSOP-14 PACKAGE
APPLICATIONS
D
INDUSTRIAL SENSOR AMPLIFIERS:
D
D
D
D
D
D
D
D
Bridge, RTD, Thermistor, Position
PHYSIOLOGICAL AMPLIFIERS:
ECG, EEG, EMG
A/D CONVERTER SIGNAL CONDITIONING
DIFFERENTIAL LINE RECEIVERS WITH GAIN
FIELD UTILITY METERS
PCMCIA CARDS
COMMUNICATION SYSTEMS
TEST EQUIPMENT
AUTOMOTIVE INSTRUMENTATION
CMRR vs FREQUENCY
120
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 40碌A. When shutdown, the
INA321 has a quiescent current of less than 1碌A.
Returning to normal operations within nanoseconds, 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.
CMRR (dB)
100
INA321
80
Nearest
Competition
60
10x
Im provement
40
10
100
Frequency (Hz)
1k
10k
R
1
160k鈩?/div>
REF
A1
RG
160k鈩?/div>
R
2
40k鈩?/div>
40k鈩?/div>
V
IN鈭?/div>
V
IN+
A3
A2
V
OUT
Gain = 5 + 5(R2/R1)
V
OUT
= (V
IN+
鈭?/div>
V
IN鈭?/div>
)
鈥?/div>
Gain
Shutdown
V+
V鈭?/div>
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
錚?/div>
2000-2004, Texas Instruments Incorporated
www.ti.com
INA2321EA/250 產(chǎn)品屬性
Texas Instruments
差分放大器
2 Channels
60 dB
1 mV
80 dB
3 V, 5 V
0.12 mA
SMD/SMT
TSSOP-14
Reel
250
Depends on Vref
Depends on Vref
+ 125 C
- 55 C
INA2321EA/250相關型號PDF文件下載
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