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
廬
National Semiconductor Corp.,
Difet
廬
Burr-Brown Corp.
+V
CC
7
8
鈥揑n
2
+In
3
Noise-Free Cascode
(2)
Output
6
Trim
(1)
1
Trim
(1)
5
2k鈩?/div>
2k鈩?/div>
鈥揤
CC
4
10k鈩?/div>
2k鈩?/div>
2k鈩?/div>
10k鈩?/div>
OPA124 Simplified Circuit
NOTES: (1) Omitted on SOIC. (2) Patented.
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111 鈥?Twx: 910-952-1111
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