The OPA128 is an ultra-low bias current monolithic
operational amplifier. Using advanced geometry
dielectrically-isolated FET (
Difet
廬
) 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.
5
Trim
1k
鈩?/div>
2k鈩?/div>
2k鈩?/div>
4
鈥揤
CC
OPA128 Simplified Circuit
廬
Case (Guard)
8
7
+V
CC
鈥揑n
2
3
+In
Noise-Free
Cascode
6
Output
Trim
1
1k
鈩?/div>
28k鈩?/div>
28k鈩?/div>
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