OPA656 Datasheet: OPERATIONAL AMPLIFIER





OPA656 OPERATIONAL AMPLIFIER Datasheet

Part Number OPA656
Description OPERATIONAL AMPLIFIER
Manufacture etcTI
Total Page 25 Pages
PDF Download Download OPA656 Datasheet PDF

Features: OPA656 OPA656 www.ti.com SBOS196G – DECEMBER 2001 – REVISED NOVEMBER 2008 Wideband, Unity-Gain Stable, FET-Input OPERATIONAL AMPLIFIER FEATURES q 500M Hz UNITY-GAIN BANDWIDTH q LOW INPUT BIA S CURRENT: 2pA q LOW OFFSET AND DRIFT: ±0.25mV, ±2µV/°C q LOW DISTORTION: 74dB SFDR at 5MHz q HIGH OUTPUT CURRENT : 70mA q LOW INPUT VOLTAGE NOISE: 7nV/ Hz APPLICATIONS q WIDEBAND PHOTODIODE AMPLIFIERS q SAMPLE-AND-HOLD BUFFERS q CCD OUTPUT BUFFERS q ADC INPUT BUFFERS q WIDEBAND PRECISION AMPLIFIERS q TEST AND MEASUREMENT FRONT ENDS 1pF 499k 499kΩ DESCRIPTION The OPA656 com bines a very wideband, unity-gain stabl e, voltage-feedback op amp with a FET-i nput stage to offer an ultra high dynam ic-range amplifier for ADC (Analog-to-D igital Converter) buffering and transim pedance applications. Extremely low DC errors give good precision in optical a pplications. The high unity-gain stable bandwidth and JFET input allows except ional performance in high-speed, low-noise integrators. The high input impeda.

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OPA656
OPA656
www.ti.com
SBOS196G DECEMBER 2001 REVISED NOVEMBER 2008
Wideband, Unity-Gain Stable, FET-Input
OPERATIONAL AMPLIFIER
FEATURES
q 500MHz UNITY-GAIN BANDWIDTH
q LOW INPUT BIAS CURRENT: 2pA
q LOW OFFSET AND DRIFT: ±0.25mV, ±2µV/°C
q LOW DISTORTION: 74dB SFDR at 5MHz
q HIGH OUTPUT CURRENT: 70mA
q LOW INPUT VOLTAGE NOISE: 7nV/Hz
APPLICATIONS
q WIDEBAND PHOTODIODE AMPLIFIERS
q SAMPLE-AND-HOLD BUFFERS
q CCD OUTPUT BUFFERS
q ADC INPUT BUFFERS
q WIDEBAND PRECISION AMPLIFIERS
q TEST AND MEASUREMENT FRONT ENDS
1pF
499k
499k
DESCRIPTION
The OPA656 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 (Analog-to-Digital
Converter) buffering and transimpedance applications. Extremely
low DC errors give good precision in optical applications.
The high unity-gain stable bandwidth and JFET input allows
exceptional performance in high-speed, low-noise integrators.
The high input impedance and low bias current provided by
the FET input is supported by the ultra-low 7nV/Hz input
voltage noise to achieve a very low integrated noise in
wideband photodiode transimpedance applications.
Broad transimpedance bandwidths are achievable given the
OPA656’s high 230MHz gain bandwidth product. As shown
below, a –3dB bandwidth of 1MHz is provided even for a high
1Mtransimpedance gain from a 47pF source capacitance.
RELATED OPERATIONAL AMPLIFIER PRODUCTS
SLEW VOLTAGE
VS BW RATE NOISE
DEVICE (V) (MHz) (V/µS) (nV/HZ) AMPLIFIER DESCRIPTION
OPA355 +5 200
OPA655 ±5 400
OPA657 ±5 1600
OPA627 ±15 16
THS4601 ±15 180
300
290
700
55
100
5.8 Unity-Gain Stable CMOS
6 Unity-Gain Stable FET-Input
4.8 Gain of +7 Stable FET-Input
4.5 Unity-Gain Stable FET-Input
5.4 Unity-Gain Stable FET-Input
λ OPA656
(47pF)
VO
Vb
Wideband Photodiode Transimpedance Amplifier
1MTRANSIMPEDANCE BANDWIDTH
130
1MHz Bandwidth
120
110
100
90
80
10kHz
100kHz
Frequency
1MHz
5MHz
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2001-2008, Texas Instruments Incorporated

                    
                    






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