OPA691 Datasheet, PDF (1/25 Pages) Texas Instruments – Wideband, Current Feedback OPERATIONAL AMPLIFIER With Disable

OPA691
OPA691
OPA691
SBOS226A – DECEMBER 2001– REVISED SEPTEMBER 2002
Wideband, Current Feedback
OPERATIONAL AMPLIFIER With Disable
FEATURES
q FLEXIBLE SUPPLY RANGE:
+5V to +12V Single-Supply
±2.5V to ±6V Dual-Supply
q UNITY-GAIN STABLE: 280MHz (G = 1)
q HIGH OUTPUT CURRENT: 190mA
q OUTPUT VOLTAGE SWING: ±4.0V
q HIGH SLEW RATE: 2100V/µs
q LOW dG/d^φ: 0.07% /0.02°
q LOW SUPPLY CURRENT: 5.1mA
q LOW DISABLED CURRENT: 150µA
q WIDEBAND +5V OPERATION: 190MHz (G = +2)
APPLICATIONS
q xDSL LINE DRIVER
q BROADBAND VIDEO BUFFERS
q HIGH-SPEED IMAGING CHANNELS
q PORTABLE INSTRUMENTS
q ADC BUFFERS
q ACTIVE FILTERS
q WIDEBAND INVERTING SUMMING
q HIGH SFDR IF AMPLIFIER
DESCRIPTION
The OPA691 sets a new level of performance for broadband
current feedback op amps. Operating on a very low 5.1mA
supply current, the OPA691 offers a slew rate and output
power normally associated with a much higher supply cur-
rent. A new output stage architecture delivers a high output
current with minimal voltage headroom and crossover distor-
tion. This gives exceptional single-supply operation. Using a
single +5V supply, the OPA691 can deliver a 1V to 4V output
swing with over 150mA drive current and 190MHz band-
width. This combination of features makes the OPA691 an
ideal RGB line driver or single-supply Analog-to-Digital Con-
verter (ADC) input driver.
The OPA691’s low 5.1mA supply current is precisely trimmed
at 25°C. This trim, along with low drift over-temperature,
ensures lower maximum supply current than competing
products. System power may be further reduced by using the
optional disable control pin. Leaving this disable pin open, or
holding it HIGH, gives normal operation. If pulled LOW, the
OPA691 supply current drops to less than 150µA while the
output goes into a high impedance state. This feature may be
used for power savings.
OPA691 RELATED PRODUCTS
Voltage Feedback
Current Feedback
Fixed Gain
SINGLES
OPA690
OPA681
OPA692
DUALS
OPA2690
OPA2691
TRIPLES
OPA3690
OPA3691
OPA3692
+5V
DIS
50Ω
V₁
50Ω
V₂
50Ω
V₃
50Ω
V₄
50Ω
V₅
OPA691
30Ω
100Ω
–5V
50Ω
RG-58
V_O = –(V₁ + V₂ + V₃ + V₄ + V₅)
50Ω
100MHz, –1dB Compression = 15dBm
200MHz RF Summing Amplifier
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.
www.ti.com
Copyright © 2001, Texas Instruments Incorporated