OPA2695 Datasheet, PDF (1/40 Pages) Texas Instruments – Dual, Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER with Disable

OPA2695
OPA2695
OPA2695
www.ti.com..................................................................................................................................................................................................... SBOS354 – APRIL 2008
Dual, Ultra-Wideband, Current-Feedback
OPERATIONAL AMPLIFIER with Disable
FEATURES
1
•23 GAIN = +2V/V BANDWIDTH (850MHz)
• GAIN = +8V/V BANDWIDTH (450MHz)
• OUTPUT VOLTAGE SWING: ±4.1V
• ULTRA-HIGH SLEW RATE: 2900V/µs
• DIFFERENTIAL 3RD-ORDER INTERCEPT:
> 40dBm (f < 140MHz, 800Ω)
• LOW POWER: 129mW/channel
• LOW DISABLED POWER: 0.5mW/channel
APPLICATIONS
• VERY WIDEBAND ADC DRIVERS
• LOW-COST PRECISION IF AMPLIFIERS
• BROADBAND VIDEO LINE DRIVERS
• PORTABLE INSTRUMENTS
• ACTIVE FILTERS
• ARB WAVEFORM OUTPUT DRIVERS
+5V
1/2
OPA2695
Z_I = R_T || 2R_G
R_G
V_I
1:1
R_F
500W
R_T
R_F
R_G
500W
R_L
800W
V_O
V_O
V_I
=
500W
R_G
= G_D
1/2
OPA2695
-5V
Differential Driver Test Circuit
-65
G_D = 10V/V
-70 ^VO ^{= 2V}PP
R_L = 800W
-75
-80
3rd Harmonic
-85
-90
-95
2nd Harmonic
-100
10
100
Frequency (MHz)
Differential Harmonic Distortion
DESCRIPTION
The OPA2695 is a dual, very high bandwidth,
current-feedback op amp that combines exceptional
2900V/µs slew rate and low input voltage noise to
deliver a precision, low-cost, high dynamic range
intermediate frequency (IF) amplifier. The device has
been optimized for high gain operation, and the pin
outs of the two available packages (QFN-16, SO-8)
have been optimized to provide symmetrical input
and output paths. This architecture makes the
OPA2695 an ideal choice as a differential driver, such
as for a high-speed analog-to-digital converter (ADC).
The OPA2695 low 12.9mA/channel supply current is
precisely trimmed at +25°C. This trim, along with a
low temperature drift, gives low system power over
temperature. System power may be further reduced
with the optional disable control pin. Leaving this pin
open, or holding it high, gives normal operation. If
pulled low, the OPA2695 supply current drops to less
than 200µA/channel. This power-saving feature,
along with exceptional single +5V operation, makes
the OPA2695 ideal for portable applications. The
OPA2695 is available in an SO-8 (without disable)
package or QFN-16 package (with disable).
OPA2695 RELATED PRODUCTS
SINGLES
OPA695
OPA691
OPA693
OPA694
DUALS
—
OPA2691
—
OPA2694
TRIPLES
OPA3695
OPA3691
OPA3693
—
COMMENTS
Ultra-wideband
current-feedback operational
amplifier with disable
Wideband, high output
current, current-feedback
operational amplifier with
disable
Ultra-wideband, fixed-gain
operational amplifier
Ultra-wideband, low-power,
current-feedback operational
amplifier
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, Inc.
2
All other trademarks are the property of their respective owners.
3
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