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/鈭欻z input voltage noise to achieve a
very low integrated noise in wideband photodiode
transimpedance applications.
Broad transimpedance bandwidths are achievable given
the OPA655鈥檚 high 240MHz gain bandwidth product.
As shown below, a 鈥?dB bandwidth of 1MHz is
provided even for a high 1M鈩?transimpedance gain
from a 47pF source capacitance.
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
1M鈩?TRANSIMPEDANCE BANDWIDTH
130
499k鈩?/div>
499k鈩?/div>
Transimpedance Gain (dB)
1MHz Bandwidth
120
110
位
(47pF)
OPA655
100鈩?/div>
V
O
100
90
鈥揤
b
80
10kHz
100kHz
Frequency
1MHz
5MHz
Wideband Photodiode Transimpedance Amplifier
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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