THS4631 Datasheet, PDF (1/34 Pages) Texas Instruments – HIGH-VOLTAGE, HIGH SLEW RATE, WIDEBAND FET-INPUT OPERATIONAL AMPLIFIER

D−8 DDA−8 DGN−8
THS4631
www.ti.com
SLOS451B – DECEMBER 2004 – REVISED AUGUST 2011
HIGH-VOLTAGE, HIGH SLEW RATE, WIDEBAND
FET-INPUT OPERATIONAL AMPLIFIER
Check for Samples: THS4631
FEATURES
1
•2 High Bandwidth:
– 325 MHz in Unity Gain
– 210 MHz Gain Bandwidth Product
• High Slew Rate:
– 900 V/µs (G = 2)
– 1000 V/µs (G = 5)
• Low Distortion of –76 dB, SFDR at 5 MHz
• Maximum Input Bias Current: 100 pA
• Input Voltage Noise: 7 nV/√Hz
• Maximum Input Offset Voltage: 500 µV at 25°C
• Low Offset Drift: 2.5 µV/°C
• Input Impedance: 10⁹ || 3.9 pF
• Wide Supply Range: ± 5 V to ± 15 V
• High Output Current: 95 mA
APPLICATIONS
• Wideband Photodiode Amplifier
• High-Speed Transimpedance Gain Stage
• Test and Measurement Systems
• Current-DAC Output Buffer
• Active Filtering
• High-Speed Signal Integrator
• High-Impedance Buffer
Photodiode Circuit
C_F
DESCRIPTION
The THS4631 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 210-MHz gain
bandwidth product, ±15-V supply operation, and
100-pA input bias current, the THS4631 is capable of
simultaneous wideband transimpedance gain and
large output signal swing. The fast 1000 V/µs slew
rate allows for fast settling times and good harmonic
distortion at high frequencies. 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 THS4631 make it ideally
suited for use as a wideband photodiode amplifier.
Photodiode output current is a prime candidate for
transimpedance amplification as shown below. Other
potential applications include test and measurement
systems requiring high-input impedance, ADC and
DAC buffering, high-speed integration, and active
filtering.
The THS4631 is offered in an 8-pin SOIC (D), and
the 8-pin SOIC (DDA) and MSOP (DGN) with
PowerPAD™ package.
Related FET Input Amplifier Products
DEVICE
V_S
(V)
GBWP
(MHz)
SLEW
RATE
(V/µS)
VOLTAGE
NOISE
(nV/√Hz)
MINIMUM
GAIN
OPA656
±5
230
290
7
1
OPA657
±5
1600
700
4.8
7
OPA627
±15
16
55
4.5
1
THS4601
±15
180
100
5.4
1
R_F
λ
_
+
R_L
−V_(Bias)
1
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.
PowerPad is a trademark of Texas Instruments.
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 © 2004–2011, Texas Instruments Incorporated