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Электронный компонент: INA321

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FEATURES
D
LOW QUIESCENT CURRENT: 40
A/channel
Shut Down: < 1
A
D
HIGH GAIN ACCURACY: G = 5, 0.02%,
2ppm/
C
D
GAIN SET WITH EXTERNAL RESISTORS
D
LOW OFFSET VOLTAGE:
200
V
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 40
A. When shutdown, the
INA321 has a quiescent current of less than 1
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.
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
CMRR vs FREQUENCY
Frequency (Hz)
CM
RR
(
d
B
)
1k
10
100
10k
120
100
80
60
40
INA321
Nearest
Competition
10x
Im provement
A2
A1
A3
160k
REF
V
IN
-
V
IN+
40k
40k
Shutdown
V+
V
OUT
V
OUT
= (V
IN+
-
V
IN
-
)
Gain
Gain = 5 + 5(R2/R1)
V
-
R
2
R
1
RG
160k
INA321
INA2321
SBOS168B - DECEMBER 2000 - REVISED JULY 2004
microPower, Single-Supply, CMOS
Instrumentation Amplifier
www.ti.com
Copyright
2000-2004, Texas Instruments Incorporated
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.
INA321
INA2321
SBOS168B - DECEMBER 2000 - REVISED JULY 2004
www.ti.com
2
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (soldering, 10s)
+300
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.
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
Tape and Reel, 250
INA321E/2K5
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
RG
V
IN
-
V
IN
+
V
-
Shutdown
V+
V
OUT
REF
INA321
MSOP-8 (E, EA)
1
2
3
4
8
7
6
5
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Shutdown A
V
OUT
A
REFA
V+
REFB
V
OUT
B
Shutdown B
RGA
V
IN
-
A
V
IN
+A
V
-
V
IN
+B
V
IN
-
B
RGB
INA2321
Dual, TSSOP-14 (EA)
INA321
INA2321
SBOS168B - DECEMBER 2000 - REVISED JULY 2004
www.ti.com
3
ELECTRICAL CHARACTERISTICS: V
S
= +2.7V to +5.5V
BOLDFACE limits apply over the specified temperature range, T
A
= -55
5
C to +125
5
C.
At TA = +25
C, RL = 25k
, G = 25, and IA common = VS/2, unless otherwise noted.
INA321E
INA321EA
INA2321EA
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
INPUT
Input Offset Voltage, RTI
VS = +5V
0.2
0.5
1
mV
Over Temperature
VOS
2.2
2.5
mV
vs Temperature
dVOS/dT
7
*
V/
C
vs Power Supply
PSRR
VS = +2.7V to +5.5V
50
200
V/V
Over Temperature
220
*
V/V
Long-Term Stability
0.4
V/month
Input Impedance
1013 || 3
|| pF
Input Common-Mode Range
VS = 2.7V
0.35
1.5
V
VS = 5V
0.55
3.8
V
Common-Mode
Rejection
CMRR
VS = 5V, VCM = 0.55V to 3.8V
90
94
80
dB
Over Temperature
VS = 5V, VCM = 0.55V to 3.8V
77
75
dB
VS = 2.7V, VCM = 0.35V to 1.5V
94
dB
Crosstalk, Dual
110
dB
INPUT BIAS CURRENT
Bias Current
IB
0.5
10
pA
Offset Current
IOS
0.5
10
pA
NOISE, RTI
en
RS = 0
Voltage Noise: f = 10Hz
500
nV/
Hz
f = 100Hz
190
nV/
Hz
f = 1kHz
100
nV/
Hz
f = 0.1Hz to 10Hz
20
VPP
Current Noise: f = 1kHz
3
fA/
Hz
GAIN(1)
Gain Equation, Externally Set
G > 5
G = 5 + 5 (R2/R1)
Range of Gain
5
1000
V/V
Gain Error
0.02
0.1
%
vs Temperature
G = 5
2
10
*
*
ppm/
C
Nonlinearity
G = 25, VS = 5V, VO = 0.05 to 4.95
0.001
0.010
% of FS
Over Temperature
0.002
0.015
*
*
% of FS
OUTPUT
Output Voltage Swing from Rail(2, 5)
G
10
50
25
mV
Over Temperature
50
*
mV
Capacitance Load Drive
See Typical Characteristic(3)
pF
Short-Circuit Current
+ISC
8
-ISC
16
mA
NOTE:
Specification is same as INA321E.
(1) Does not include errors from external gain setting resistors.
(2) Output voltage swings are measured between the output and power-supply rails.
(3) See typical characteristic Percent Overshoot vs Load Capacitance.
(4) See typical characteristic Shutdown Voltage vs Supply Voltage.
(5) Output does not swing to positive rail if gain is less than 10.
INA321
INA2321
SBOS168B - DECEMBER 2000 - REVISED JULY 2004
www.ti.com
4
ELECTRICAL CHARACTERISTICS: V
S
= +2.7V to +5.5V (continued)
BOLDFACE limits apply over the specified temperature range, T
A
= -55
5
C to +125
5
C.
At TA = +25
C, RL = 25k
, G = 25, and IA common = VS/2, unless otherwise noted.
INA321EA
INA2321EA
INA321E
PARAMETER
UNIT
MAX
TYP
MIN
MAX
TYP
MIN
CONDITIONS
FREQUENCY RESPONSE
Bandwidth, -3dB
BW
G = 5
500
kHz
Slew Rate
SR
VS = 5V, G = 25
0.4
V/
s
Settling Time, 0.1%
tS
G = 5, CL = 50pF, VO = 2V step
8
s
0.01%
12
s
Overload Recovery
50% Input Overload G = 25
2
s
POWER SUPPLY
Specified Voltage Range
+2.7
+5.5
V
Operating Voltage Range
+2.5 to +5.5
V
Quiescent Current
IQ
per Channel, VSD > 2.5(4)
40
60
A
Over Temperature
70
*
A
Shutdown Quiescent Current
ISD
per Channel, VSD > 0.8(4)
0.01
1
A
TEMPERATURE RANGE
Specified Range
-55
+125
C
Operating/Storage Range
-65
+150
C
Thermal Resistance
q
JA
MSOP-8, TSSOP-14
Surface-Mount
150
C/W
NOTE:
Specification is same as INA321E.
(1) Does not include errors from external gain setting resistors.
(2) Output voltage swings are measured between the output and power-supply rails.
(3) See typical characteristic Percent Overshoot vs Load Capacitance.
(4) See typical characteristic Shutdown Voltage vs Supply Voltage.
(5) Output does not swing to positive rail if gain is less than 10.
INA321
INA2321
SBOS168B - DECEMBER 2000 - REVISED JULY 2004
www.ti.com
5
TYPICAL CHARACTERISTICS
At TA = +25
C, VS = 5V, VCM =1/2VS, RL = 25k
, and CL = 50pF, unless otherwise noted.
GAIN vs FREQUENCY
10
Ga
i
n
(d
B
)
Frequency (Hz)
100
1k
10k
100k
1M
10M
80
70
60
50
40
30
20
10
0
-
10
-
20
Gain = 500
Gain = 100
Gain = 25
Gain = 5
COMMON-MODE REJECTION RATIO
vs FREQUENCY
10
CM
RR
(
d
B
)
Frequency (Hz)
100
1k
10k
100k
120
100
80
60
40
20
0
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
1
PSR
R
(
d
B
)
Frequency (Hz)
10
100
1k
10k
100k
100
90
80
70
60
50
40
30
20
10
0
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
100
M
a
x
i
m
u
m
O
utput
V
o
l
t
age
(
V
PP
)
Frequency (Hz)
1k
10k
100k
1M
10M
6
5
4
3
2
1
0
V
S
= 5.5V
V
S
= 5.0V
V
S
= 2.7V
NOISE vs FREQUENCY
1
VN
o
i
se
(
n
V
/
Hz
)
Frequency (Hz)
10
100
10k
1k
100k
10k
1k
100
10
100
10
1
0.1
IN
o
i
s
e
(
f
A
/
Hz
)
0.1Hz TO 10Hz VOLTAGE NOISE
1s/div
10
v/
d
i
v