OPA659 Datasheet, PDF (1/25 Pages) Texas Instruments – Wideband, Unity-Gain Stable, JFET-Input OPERATIONAL AMPLIFIER

OPA659
OPA659
www.ti.com........................................................................................................................................................................................... SBOS342 – DECEMBER 2008
Wideband, Unity-Gain Stable, JFET-Input
OPERATIONAL AMPLIFIER
FEATURES
1
•2 HIGH BANDWIDTH: 650MHz (G = +1V/V)
• HIGH SLEW RATE: 2550V/µs (4V Step)
• EXCELLENT THD: –78dBc at 10MHz
• LOW INPUT VOLTAGE NOISE: 8.9nV/√Hz
• FAST OVERDRIVE RECOVERY: 8ns
• FAST SETTLING TIME (1% 4V Step): 8ns
• LOW INPUT OFFSET VOLTAGE: ±1mV
• LOW INPUT BIAS CURRENT: ±10pA
• HIGH OUTPUT CURRENT: 70mA
APPLICATIONS
• HIGH-IMPEDANCE DATA ACQUISITION INPUT
AMPLIFIER
• HIGH-IMPEDANCE OSCILLOSCOPE INPUT
AMPLIFIER
• WIDEBAND PHOTODIODE TRANSIMPEDANCE
AMPLIFIER
• WAFER SCANNING EQUIPMENT
TRANSIMPEDANCE GAIN
vs FREQUENCY (C_D = 22pF)
+6V
Photo ^l
Diode
I_D
C_D
-V_B
0.1mF
10mF
OPA659
V_OUT
R_OUT
50W Load
R_F
C_F
0.1mF
10mF
-6V
130
120
110
100
90
80
70
60
50
40
100k
R_F = 1MW, C_F = Open
R_F = 100kW,
C_F = 0.5pF
R_F = 100kW, C_F = Open
R_F = 10kW,
C_F = Open
R_F = 10kW, C_F = 1.5pF
R_F = 1kW, C_F = Open
R_F = 1kW, C_F = 4.7pF
1M
10M
Frequency (Hz)
100M
DESCRIPTION
The OPA659 combines a very wideband, unity-gain
stable, voltage-feedback operational amplifier with a
JFET-input stage to offer an ultra-high dynamic range
amplifier for high impedance buffering in data
acquisition applications such as oscilloscope
front-end amplifiers and machine vision applications
such as photodiode transimpedance amplifiers used
in wafer inspection.
The wide 650MHz unity-gain bandwidth is
complemented by a very high 2550V/µs slew rate.
The high input impedance and low bias current
provided by the JFET input are supported by the low
8.9nV/√Hz input voltage noise to achieve a very low
integrated noise in wideband photodiode
transimpedance applications.
Broad transimpedance bandwidths are possible with
the high 350MHz gain bandwidth product of this
device.
Where lower speed with lower quiescent current is
required, consider the OPA656. Where unity-gain
stability is not required, consider the OPA657.
DEVICE
OPA356
OPA653
OPA656
OPA657
OPA627
THS4631
RELATED
OPERATIONAL AMPLIFIER
PRODUCTS
V_S
BW
(V) (MHz)
+5
200
±6
500
±5
500
±5 1600
±15
16
±15 105
SLEW
RATE
(V/µs)
300
2675
290
700
55
900
VOLTAGE
NOISE
(nV/√Hz)
5.80
6.1
7
4.8
4.5
7
AMPLIFIER
DESCRIPTION
Unity-Gain
Stable CMOS
Fixed Gain of
+2V/V
JFET-Input
Unity-Gain
Stable
JFET-Input
Gain of +7
Stable
JFET-Input
Unity-Gain
Stable
DI-FET-Input
Unity-Gain
Stable
JFET-Input
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated