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PDF OPA128 Data sheet ( Hoja de datos )
| Número de pieza | OPA128 | |
| Descripción | Difet Electrometer-Grade OPERATIONAL AMPLIFIER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OPA128 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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® OPA128
Difet® Electrometer-Grade
OPERATIONAL AMPLIFIER
FEATURES
q ULTRA-LOW BIAS CURRENT: 75fA max
q LOW OFFSET: 500µV max
q LOW DRIFT: 5µV/°C max
q HIGH OPEN-LOOP GAIN: 110dB min
q HIGH COMMON-MODE REJECTION:
90dB min
q IMPROVED REPLACEMENT FOR AD515
AND AD549
APPLICATIONS
q ELECTROMETER
q MASS SPECTROMETER
q CHROMATOGRAPH
q ION GAUGE
q PHOTODETECTOR
q RADIATION-HARD EQUIPMENT
DESCRIPTION
The OPA128 is an ultra-low bias current monolithic
operational amplifier. Using advanced geometry
dielectrically-isolated FET (Difet®) inputs, this mono-
lithic amplifier achieves a performance level exceed-
ing even the best hybrid electrometer amplifiers.
Laser-trimmed thin-film resistors give outstanding volt-
age offset and drift performance.
A noise-free cascode and low-noise processing give
the OPA128 excellent low-level signal handling capa-
bilities. Flicker noise is very low.
The OPA128 is an improved pin-for-pin replacement
for the AD515.
Difet® Burr-Brown Corp.
Case (Guard)
8
–In
2
3
+In
Noise-Free
Cascode
Trim 1kΩ
1
5
Trim 1kΩ
28kΩ
2kΩ
28kΩ
2kΩ
OPA128 Simplified Circuit
7
+VCC
6
Output
4
–VCC
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1986 Burr-Brown Corporation
PDS-653E
Printed in U.S.A. May, 1995
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, +15VDC unless otherwise noted.
100pA
BIAS AND OFFSET CURRENT
vs TEMPERATURE
10
10pA
SM
1pA
IB
IOS
1
100
0.1
10
BIAS AND OFFSET CURRENT
vs INPUT COMMON-MODE VOLTAGE
1
–50
–25
0 25 50 75
Ambient Temperature (°C)
100 125
0.01
–15 –10 –5
0
5 10
Common-Mode Voltage (V)
15
GAIN-BANDWIDTH AND SLEW RATE
vs TEMPERATURE
4
4
GAIN-BANDWIDTH AND SLEW RATE
vs SUPPLY VOLTAGE
36
33
22
11
0
–75
–50 –25 0 25 50 75
Ambient Temperature (°C)
0
100 125
2
1
0
0
+ Slew
– Slew
5 10 15
Supply Voltage (±VCC)
4
2
0
20
SUPPLY CURRENT vs TEMPERATURE
2
1.5
1
0.5
0
–75 –50 –25 0 25 50 75
Ambient Temperature (°C)
100 125
OPEN-LOOP GAIN, PSR, AND CMR vs TEMPERATURE
140
130 AOL
120
CMR
110
PSR
100
–75
–50 –25 0 25 50 75
Ambient Temperature (°C)
100 125
®
5 OPA128
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet OPA128.PDF ] | |
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