®
OPA627
OPA637
OPA627
OPA627
Precision High-Speed
Difet ® OPERATIONAL AMPLIFIERS
APPLICATIONS
● PRECISION INSTRUMENTATION
FEATURES
● VERY LOW NOISE: 4.5nV/√Hz at 10kHz
● FAST DATA ACQUISITION
● FAST SETTLING TIME:
OPA627—550ns to 0.01%
OPA637—450ns to 0.01%
● DAC OUTPUT AMPLIFIER
● OPTOELECTRONICS
● LOW VOS: 100µV max
● SONAR, ULTRASOUND
● LOW DRIFT: 0.8µV/°C max
● LOW IB: 5pA max
● HIGH-IMPEDANCE SENSOR AMPS
● HIGH-PERFORMANCE AUDIO CIRCUITRY
● OPA627: Unity-Gain Stable
● OPA637: Stable in Gain ≥ 5
● ACTIVE FILTERS
High frequency complementary transistors allow in-
creased circuit bandwidth, attaining dynamic perform-
ance not possible with previous precision FET op
amps. The OPA627 is unity-gain stable. The OPA637
is stable in gains equal to or greater than five.
DESCRIPTION
The OPA627 and OPA637 Difet operational amplifi-
ers provide a new level of performance in a precision
FET op amp. When compared to the popular OPA111
op amp, the OPA627/637 has lower noise, lower offset
voltage, and much higher speed. It is useful in a broad
range of precision and high speed analog circuitry.
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.
The OPA627/637 is fabricated on a high-speed, dielec-
trically-isolated complementary NPN/PNP process. It
operates over a wide range of power supply voltage—
±4.5V to ±18V. Laser-trimmed Difet input circuitry
provides high accuracy and low-noise performance
comparable with the best bipolar-input op amps.
The OPA627/637 is available in plastic DIP, SOIC
and metal TO-99 packages. Industrial and military
temperature range models are available.
7
+VS
Trim
1
Trim
5
Output
6
+In
3
–In
2
Difet ®, Burr-Brown Corp.
–VS
4
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
• Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/
•
•
Cable: BBRCORP
•
Telex: 066-6491
•
FAX: (520) 889-1510
•
Immediate Product Info: (800) 548-6132
©1989 Burr-Brown Corporation
PDS-998H
Printed in U.S.A. March, 1998
SBOS165
TI [ TEXAS INSTRUMENTS ]
