OPA655 Datasheet, PDF (1/14 Pages) Burr-Brown (TI) – Wideband, Unity Gain Stable, FET-Input OPERATIONAL AMPLIFIER

®
OPA655
OPA655
OPA655
Wideband, Unity Gain Stable, FET-Input
OPERATIONAL AMPLIFIER
FEATURES
q 400MHz UNITY GAIN BANDWIDTH
q LOW INPUT BIAS CURRENT: 5pA
q HIGH INPUT IMPEDANCE: 10¹²â„¦ || 1.0pF
q ULTRA-LOW dG/dP: 0.006%/0.009°
q LOW DISTORTION: 90dB SFDR at 5MHz
q FAST SETTLING: 17ns (0.01%)
q HIGH OUTPUT CURRENT: 60mA
q FAST OVERDRIVE RECOVERY
APPLICATIONS
q WIDEBAND PHOTODIODE
AMPLIFIER
q PEAK DETECTOR
q CCD OUTPUT BUFFER
q ADC INPUT BUFFER
q HIGH SPEED INTEGRATOR
q TEST AND MEASUREMENT FRONT END
1pF
499kΩ
499kΩ
λ
OPA655
(47pF)
V_O
100Ω
–V_b
Wideband Photodiode Transimpedance Amplifier
DESCRIPTION
The OPA655 combines a very wideband, unity gain
stable, voltage feedback op amp with a FET input
stage to offer an ultra high dynamic range amplifier
for ADC buffering and transimpedance applications.
Extremely low harmonic distortion along with excel-
lent pulse settling characteristics will support even the
most demanding ADC input buffer requirements.
The broad unity gain stable bandwidth and FET input
allows exceptional performance in high speed, low
noise integrators.
The high input impedance and low bias current pro-
vided by the FET input is further supported by the
ultra-low 6nV/√Hz input voltage noise to achieve a
very low integrated noise in wideband photodiode
transimpedance applications.
Broad transimpedance bandwidths are achievable given
the OPA655’s high 240MHz gain bandwidth product.
As shown below, a –3dB bandwidth of 1MHz is
provided even for a high 1MΩ transimpedance gain
from a 47pF source capacitance.
1MΩ TRANSIMPEDANCE BANDWIDTH
130
1MHz Bandwidth
120
110
100
90
80
10kHz
100kHz
Frequency
1MHz
5MHz
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
© 1994 Burr-Brown Corporation
PDS-1271D
Printed in U.S.A. May, 1997