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PDF INA117AM Data sheet ( Hoja de datos )
| Número de pieza | INA117AM | |
| Descripción | High Common-Mode Voltage DIFFERENCE AMPLIFIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
INA117
INA117
INA117
High Common-Mode Voltage
DIFFERENCE AMPLIFIER
FEATURES
q COMMON-MODE INPUT RANGE:
±200V (VS = ±15V)
q PROTECTED INPUTS:
±500V Common-Mode
±500V Differential
q UNITY GAIN: 0.02% Gain Error max
q NONLINEARITY: 0.001% max
q CMRR: 86dB min
APPLICATIONS
q CURRENT MONITOR
q BATTERY CELL-VOLTAGE MONITOR
q GROUND BREAKER
q INPUT PROTECTION
q SIGNAL ACQUISITION IN NOISY
ENVIRONMENTS
q FACTORY AUTOMATION
DESCRIPTION
The INA117 is a precision unity-gain difference
amplifier with very high common-mode input voltage
range. It is a single monolithic IC consisting of a
precision op amp and integrated thin-film resistor
network. It can accurately measure small differential
voltages in the presence of common-mode signals up
to ±200V. The INA117 inputs are protected from
momentary common-mode or differential overloads
up to ±500V.
In many applications, where galvanic isolation is not
essential, the INA117 can replace isolation amplifiers.
This can eliminate costly isolated input-side power
supplies and their associated ripple, noise and quies-
cent current. The INA117’s 0.001% nonlinearity and
200kHz bandwidth are superior to those of conven-
tional isolation amplifiers.
The INA117 is available in 8-pin plastic mini-DIP and
SO-8 surface-mount packages, specified for the –40°C
to +85°C temperature range. The metal TO-99 models
are available specified for the –40°C to +85°C and
–55°C to +125°C temperature range.
21.11kΩ
RefB 1
380kΩ
–In 2
380kΩ
+In 3
V– 4
380kΩ
20kΩ
8 Comp
7 V+
6 VO
5 RefA
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1987 Burr-Brown Corporation
PDS-748G
Printed in U.S.A. August, 1999
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±15V, unless otherwise noted.
SMALL SIGNAL STEP RESPONSE
CL = 0
SMALL SIGNAL STEP RESPONSE
CL = 1000pF
LARGE SIGNAL STEP RESPONSE
®
5 INA117
5 Page 
2
V2
380kΩ
380kΩ
V3 3
380kΩ
6
21.1kΩ
81
20kΩ
5 R7
INA117
R6
VO =
1
V3 – V2
+ 19 R7
R6
OPA27
Refer to Application
Bulletin AB-001 for
details.
V–
4
2 380kΩ
V2
V+
7
380kΩ
380kΩ
V3 3
6
VO = V3 – V2 + VX
21.1kΩ
20kΩ
8 15
INA117
GAIN
(V/V)
1/2
1/4
1/5
R7
(kΩ)
1.05
3.16
4.22
R6
(kΩ)
20
20
20
FIGURE 10. Reducing Differential Gain.
OPA27
VX
FIGURE 11. Summing VX in Output.
Refer to Application Bulletin AB-010 for details.
R1
2 380kΩ
V2
R2
380kΩ
R3
3 380kΩ
V3
6
R5
21.1kΩ
81
R4
20kΩ
5
R6
5kΩ
INA117
100pF
R7
10kΩ
R9
400kΩ
R8
10kΩ
(b) A1
OPA27
R1
2 380kΩ
V2
R2
380kΩ
(a)
R3
3 380kΩ
V3
6
VOUT = V3 – V2
R5
21.1kΩ
81
VOUT = V3 – V2
100pF
R10
10kΩ
R4
20kΩ
5
R6
5kΩ
INA117
100pF
R7
10kΩ
A1
OPA27
–V3 /20
A2
OPA27
VCM /20
FIGURE 12. Common-Mode Voltage Monitoring.
11
INA117
®
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet INA117AM.PDF ] | |
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