OPA
269
0
OPA2690
SBOS238 – JUNE 2002
OPA
269
0
Dual, Wideband, Voltage-Feedback
OPERATIONAL AMPLIFIER With Disable
FEATURES
q
FLEXIBLE SUPPLY RANGE:
+5V to +12V Single Supply
±
2.5V to
±
6V Dual Supply
q
WIDEBAND +5V OPERATION: 220MHz (G = 2)
q
HIGH OUTPUT CURRENT: 190mA
q
OUTPUT VOLTAGE SWING:
±
4.0V
q
HIGH SLEW RATE: 1800V/
µ
s
q
LOW SUPPLY CURRENT: 5.5mA/ch
q
LOW DISABLED CURRENT: 100
µ
A/ch
DESCRIPTION
The OPA2690 represents a major step forward in unity-gain
stable, voltage-feedback op amps. A new internal architec-
ture provides slew rate and full-power bandwidth previously
found only in wideband current-feedback op amps. A new
output stage architecture delivers high currents with a mini-
mal headroom requirement. These give exceptional single-
supply operation. Using a single +5V supply, the OPA2690
can deliver a 1V to 4V output swing with over 120mA drive
current and 150MHz bandwidth. This combination of fea-
tures makes the OPA2690 an ideal RGB line driver or single-
supply Analog-to-Digital Converter (ADC) input driver.
The OPA2690’s low 5.5mA/ch supply current is precisely
trimmed at 25°C. This trim, along with low temperature drift,
ensures lower maximum supply current than competing
products. System power may be reduced further using the
optional disable control pin. Leaving this disable pin open,
or holding it HIGH, will operate the OPA2690I-14D nor-
mally. If pulled LOW, the OPA2690I-14D supply current
drops to less than 200µA/ch while the output goes into a
high impedance state.
APPLICATIONS
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VIDEO LINE DRIVING
xDSL LINE DRIVER/RECEIVER
HIGH-SPEED IMAGING CHANNELS
ADC BUFFERS
PORTABLE INSTRUMENTS
TRANSIMPEDANCE AMPLIFIERS
ACTIVE FILTERS
+5V
+2.5V
+2.5V
100pF
0.1µF +5V
2kΩ
499Ω
0.1µF
499Ω
1kΩ
35Ω
IN
10pF
V
IN
499Ω
1kΩ
2.5V
CM
2Vp-p
35Ω
IN
10pF
REFB
REFT
100Ω
2kΩ
OPA2690 RELATED PRODUCTS
SINGLES
Voltage Feedback
Current Feedback
Fixed Gain
OPA690
OPA691
OPA692
DUALS
OPA2680
OPA2691
—
TRIPLES
OPA3690
OPA3691
OPA3692
1/2
OPA2690
HARMONIC DISTORTION vs FREQUENCY
FOR THE SINGLE-SUPPLY ADC DRIVER
ADS825
10-Bit
40MSPS
–50
–55
2Vp-p Differential Output
Harmonic Distortion (dBc)
–60
–65
–70
–75
–80
–85
–90
–95
–100
1
Frequency (MHz)
10
20
2nd-Harmonic
3rd-Harmonic
1/2
OPA2690
+2.5V
499Ω
Clock
Single-Supply Differential ADC Driver.
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
ETC [ ETC ]
