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PDF OPA111 Data sheet ( Hoja de datos )
| Número de pieza | OPA111 | |
| Descripción | Low Noise Precision Difet OPERATIONAL AMPLIFIER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OPA111 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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® OPA111
Low Noise Precision Difet ®
OPERATIONAL AMPLIFIER
FEATURES
q LOW NOISE: 100% Tested, 8nV√Hz max
(10kHz)
q LOW BIAS CURRENT: 1pA max
q LOW OFFSET: 250µV max
q LOW DRIFT: 1µV/°C max
q HIGH OPEN-LOOP GAIN: 120dB min
q HIGH COMMON-MODE REJECTION:
100dB min
APPLICATIONS
q PRECISION INSTRUMENTATION
q DATA ACQUISITION
q TEST EQUIPMENT
q OPTOELECTRONICS
q MEDICAL EQUIPMENT—CAT SCANNER
q RADIATION HARD EQUIPMENT
DESCRIPTION
The OPA111 is a precision monolithic dielectrically
isolated FET (Difet ®) operational amplifier. Outstand-
ing performance characteristics allow its use in the
most critical instrumentation applications.
Noise, bias current, voltage offset, drift, open-loop
gain, common-mode rejection, and power supply re-
jection are superior to BIFET® amplifiers.
Very low bias current is obtained by dielectric isola-
tion with on-chip guarding.
Laser trimming of thin-film resistors gives very low
offset and drift. Extremely low noise is achieved with
patented circuit design techniques. A new cascode
design allows high precision input specifications and
reduced susceptibility to flicker noise.
Standard 741 pin configuration allows upgrading of
existing designs to higher performance levels.
BIFET® National Semiconductor Corp., Difet® Burr-Brown Corp.
Case and
Substrate
8
–In
2
+In
3
Noise-Free Cascode*
Trim
1
Trim
10kΩ
10kΩ
5
*Patented
2kΩ
2kΩ
2kΩ
2kΩ
+VCC
7
Output
6
–VCC
4
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
© 1984 Burr-Brown Corporation
PDS-526K
Printed in U.S.A. August, 1995
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
TA = +25°C, VCC = ±15VDC unless otherwise noted.
TOTAL* INPUT VOLTAGE NOISE SPECTRAL
DENSITY vs SOURCE RESISTANCE
1k
RS = 10MΩ
RS = 1MΩ
100
RS = 100kΩ
10 BM
*Includes contribution
from source resistance.
RS = 100Ω
1
0.1 1 10 100 1k 10k 100k
Frequency (Hz)
TOTAL* INPUT VOLTAGE NOISE (PEAK-TO-PEAK)
vs SOURCE RESISTANCE
1k
*Includes contribution
from source resistance.
100
BM
10 fB = 0.1Hz to 10Hz
1
104 105 106 107 108 109 1010
Source Resistance (Ω)
VOLTAGE AND CURRENT NOISE SPECTRAL
DENSITY vs TEMPERATURE
12 100
fO = 1kHz
10
10
81
6 0.1
4
–75 –50 –25
0 25 50
Temperature (°C)
0.01
75 100 125
BIAS AND OFFSET CURRENT
vs TEMPERATURE
1k 1k
100
BM
10
100
10
11
0.1 0.1
0.01
–50
–25
0 25 50 75
Ambient Temperature (°C)
0.01
100 125
BIAS AND OFFSET CURRENT
vs INPUT COMMON-MODE VOLTAGE
10 10
1
Bias Current
0.1 Offset Current
1
0.1
0.01
–15
–10 –5
0
5
Common-Mode Voltage (V)
10
0.01
15
140
120
100
80
60
40
20
0
1
POWER SUPPLY REJECTION
vs FREQUENCY
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
®
5 OPA111
5 Page 
10.5kΩ 0.03µF
0.01µF
Input
73.2kΩ
365Ω 2
6 365Ω 1µF Output
OPA111
3
0.01µF
100kΩ
RT CT
G = 26dB
Midband
FIGURE 14. RIAA Equalized Phono Preamplifier.
<1pF to prevent peaking
200MΩ
Pin Diode*
2
6
3 OPA111
20kΩ
*Silicon Detector Corp.
SD-041-11-21-011
0.1µF
Overload ≈ 0.1µW input
+5VDC
3
LM211
2
1
7
10kΩ
TTL
Output
Digital Common
FIGURE 15. High Sensitivity (under 1nW) Fiber Optic
Receiver for 9600 Baud Manchester Data.
Input
100Ω
100Ω
100Ω
100Ω
100Ω
10kΩ
2
6
OPA111
3
10kΩ
2
6
OPA111
3
10kΩ
2
6
OPA111
3
10kΩ
2
6
3 OPA111
10kΩ
2
6
OPA111
3
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
AV = –1010
eN = 1.9nV/√Hz typ* at 10kHz
BW = 30kHz typ
GBW = 30.3MHz typ
VOS = ±16µV typ*
∆VOS/∆T = ±0.16µV/°C typ*
IB = 10pA max
ZIN ≈ 1012Ω || 30pF
* Theoretical performance achievable
from OPA111BM with uncorrelated
random distribution of parameters.
10kΩ
2
OPA37
3
6
Output
N = 10 OPA111BM
FIGURE 16. ‘N’ Stage Parallel-Input Amplifier for Reduced Relative Amplifier Noise at the Output.
11 OPA111
®
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet OPA111.PDF ] | |
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