THS4601_14 Datasheet, PDF (1/32 Pages) Texas Instruments – WIDEBAND, FET-INPUT OPERATIONAL AMPLIFIER

THS4601
SLOS388B − OCTOBER 2001 − REVISED JUNE 2002
WIDEBAND, FETĆINPUT OPERATIONAL AMPLIFIER
FEATURES
D Gain Bandwidth Product: 180 MHz
D Slew Rate: 100 V/µs
D Maximum Input Bias Current: 100 pA
D Input Voltage Noise: 5.4 nV/√Hz
D Maximum Input Offset Voltage: 4 mV
D Input Impedance: 10⁹ Ω || 10 pF
D Power Supply Voltage Range: ±5 to ±15 V
D Unity Gain Stable
APPLICATIONS
D Wideband Photodiode Amplifier
D High-Speed Transimpedance Gain Stage
D Test and Measurement Systems
D Current-DAC Output Buffer
D Active Filtering
D High-Speed Signal Integrator
D High-Impedance Buffer
DESCRIPTION
The THS4601 is a high-speed, FET-input operational
amplifier designed for applications requiring wideband
operation, high-input impedance, and high-power
supply voltages. By providing a 180-MHz gain-
bandwidth product, ±15-V supply operation, and
100-pA input bias current, the THS4601 is capable of
wideband transimpedance gain and large output signal
swing simultaneously. Low current and voltage noise
allow amplification of extremely low-level input signals
while still maintaining a large signal-to-noise ratio.
The characteristics of the THS4601 ideally suit it for use
as a wideband photodiode amplifier. Photodiode output
current is a prime candidate for transimpedance
amplification, an application of which is illustrated in
Figure 1. Other potential applications include test and
measurement systems requiring high-input impedance,
digital-to-analog converter output buffering, high-speed
integration, and active filtering.
A SELECTION OF RELATED OPERATIONAL AMPLIFIER PRODUCTS
DEVICE
OPA627
OPA637
OPA655
VS
BW SLEW RATE
(V) (MHz)
(V/µs)
±15
16
55
±15
80
135
±5
400
290
VOLTAGE NOISE
(nV√Hz)
4.5
4.5
6
DESCRIPTION
Unity-gain stable FET-input amplifier
Gain of +5 stable FET-input amplifier
Unity-gain stable FET-input amplifier
CF = 0.7 pF
100 kΩ TRANSIMPEDANCE BANDWIDTH
105
100
RF = 100 kΩ
95
90
_
85
λ
+
80
18 pF
THS4601 RL = 1 kΩ
75
−VBias
Figure 1. Wideband Photodiode
Transimpedance Amplifier
70
Diode Capacitance: 18 pF
65 _{−3 dB Bandwidth: 4 MHz}
60
0.1
1
10
100
Frequency − MHz
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.
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.
Copyright  2002, Texas Instruments Incorporated
www.ti.com
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