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.
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
1MΩ TRANSIMPEDANCE BANDWIDTH
130
499kΩ
499kΩ
Transimpedance Gain (dB)
1MHz Bandwidth
120
110
λ
(47pF)
OPA655
100Ω
V
O
100
90
–V
b
80
10kHz
100kHz
Frequency
1MHz
5MHz
Wideband Photodiode Transimpedance Amplifier
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
+25°C for room temperature tested input bias and offset current.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
OPA655
2
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage Across Device (V
S (TOTAL)
) ................................ 11V
Internal Power Dissipation ........................... See Thermal Considerations
Differential Input Voltage ............................................................ V
S (TOTAL)
Common-Mode Input Voltage Range ..................................................
±V
S
Storage Temperature Range: P, U ............................... –40°C to +125°C
Lead Temperature (soldering, 10s) .............................................. +300°C
