OPA644 Datasheet, PDF (1/13 Pages) Burr-Brown (TI) – Low Distortion Current Feedback OPERATIONAL AMPLIFIER

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OPA644
OPA644
Low Distortion Current Feedback
OPERATIONAL AMPLIFIER
FEATURES
q SLEW RATE: 2500V/µs
q VERY LOW DIFFERENTIAL GAIN/PHASE
ERROR: 0.008%/0.009°
q LOW DISTORTION AT 5MHz: –85dBc
q HIGH BANDWIDTH: 500MHz
q HIGH OPEN LOOP TRANSIMPEDANCE:
2.0MΩ
q HIGH LINEARITY
q FAST 12-BIT SETTLING: 21ns to 0.01%
q UNITY-GAIN STABLE
APPLICATIONS
q HIGH-SPEED SIGNAL PROCESSING
q HIGH-RESOLUTION VIDEO
q PULSE AMPLIFICATION
q COMMUNICATIONS
q ADC/DAC GAIN AMPLIFIER
I_BIAS
q RF AMPLIFICATION
q MEDICAL IMAGING
q AUDIO AMPLIFICATION
3
In+
DESCRIPTION
The OPA644 is a wideband precision current feed-
back operational amplifier featuring exceptionally high
open loop transimpedance and high slew rate. The
current feedback architecture allows for excellent
large signal bandwidth, even at high gains. The high
transimpedance allows this op amp to be used in
applications requiring 16 bits or more of accuracy.
This extra transimpedance at high bandwidths gives
very low distortion and low differential gain and
phase errors. The high slew rate and well-behaved
pulse response allow for superior large signal ampli-
fication in a variety of RF, video and other signal
processing applications. Fabricated on an advanced
complementary bipolar process, the OPA644 offers
exceptional performance in monolithic form.
+V_S
7, 8
Gain Stage
Comp
2
In–
Buffer
6
V_OUT
I_BIAS
Comp
Gain Stage
4, 5
–V_S
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Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1993 Burr-Brown Corporation}
PD1S-1187D
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OPA644 Printed in U.S.A. March, 1998