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Burr-Brown - Low Noise Precision Difet OPERATIONAL AMPLIFIER

Numéro de référence OPA124
Description Low Noise Precision Difet OPERATIONAL AMPLIFIER
Fabricant Burr-Brown 
Logo Burr-Brown 





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OPA124 fiche technique
®
OPA124
OPA124
Low Noise Precision Difet ®
OPERATIONAL AMPLIFIER
FEATURES
q LOW NOISE: 6nV/Hz (10kHz)
q LOW BIAS CURRENT: 1pA max
q LOW OFFSET: 250µV max
q LOW DRIFT: 2µV/°C max
q HIGH OPEN-LOOP GAIN: 120dB min
q HIGH COMMON-MODE REJECTION:
100dB min
q AVAILABLE IN 8-PIN PLASTIC DIP
AND 8-PIN SOIC PACKAGES
DESCRIPTION
The OPA124 is a precision monolithic FET opera-
tional amplifier using a Difet (dielectrical isolation)
manufacturing process. Outstanding DC and AC per-
formance characteristics allow its use in the most
critical instrumentation applications.
Bias current, noise, voltage offset, drift, open-loop
gain, common-mode rejection and power supply re-
jection are superior to BIFET and CMOS amplifiers.
Difet fabrication achieves extremely low input bias
currents without compromising input voltage noise
performance. Low input bias current is maintained
over a wide input common-mode voltage range with
unique cascode circuitry. This cascode design also
allows high precision input specifications and reduced
susceptibility to flicker noise. Laser trimming of thin-
film resistors gives very low offset and drift.
Compared to the popular OPA111, the OPA124 gives
comparable performance and is available in an 8-pin
PDIP and 8-pin SOIC package.
BIFET® National Semiconductor Corp.,
Difet ® Burr-Brown Corp.
APPLICATIONS
q PRECISION PHOTODIODE PREAMP
q MEDICAL EQUIPMENT
q OPTOELECTRONICS
q DATA ACQUISITION
q TEST EQUIPMENT
Substrate
8
–In
2
+In
3
Noise-Free Cascode(2)
Trim(1) 10k
1
Trim(1) 10k
5
2k2k
2k2k
OPA124 Simplified Circuit
NOTES: (1) Omitted on SOIC. (2) Patented.
+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
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1993 Burr-Brown Corporation
PDS-11203C
OPA124Printed in U.S.A. March, 1998
®

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