OPA820
SBOS303A − JUNE 2004 − REVISED JULY 2004
Unity-Gain Stable, Low-Noise, Voltage-Feedback
Operational Amplifier
FEATURES
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HIGH BANDWIDTH (240MHz, G = +2)
HIGH OUTPUT CURRENT (±110mA)
LOW INPUT NOISE (2.5nV/√Hz)
LOW SUPPLY CURRENT (5.6mA)
FLEXIBLE SUPPLY VOLTAGE
Dual
±2.5V
to
±6V
Single +5V to +12V
EXCELLENT DC ACCURACY
Maximum 25°C Input Offset Voltage =
±750µV
Maximum 25°C Input Offset Current =
±400nA
DESCRIPTION
The OPA820 provides a wideband, unity-gain stable,
voltage-feedback amplifier with a very low input noise voltage
and high output current using a low 5.6mA supply current. At
unity-gain, the OPA820 gives > 800MHz bandwidth with < 1dB
peaking. The OPA820 complements this high-speed
operation with excellent DC precision in a low-power device.
A worst-case input offset voltage of
±750µV
and an offset
current of
±400nA
give excellent absolute DC precision for
pulse amplifier applications.
Minimal input and output voltage swing headroom allow the
OPA820 to operate on a single +5V supply with > 2V
PP
output
swing. While not a rail-to-rail (RR) output, this swing will
support most emerging analog-to-digital converter (ADC)
input ranges with lower power and noise than typical RR
output op amps.
Exceptionally low dG/dP (0.01%/0.03°) supports low-cost
composite video line driver applications. Existing designs can
use the industry-standard pinout SO-8 package while
emerging high-density portable applications can use the
SOT23-5. Offering the industry’s lowest thermal impedance in
a SOT package, along with full specification over both the
commercial and industrial temperature ranges, gives solid
performance over a wide temperature range.
APPLICATIONS
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LOW-COST VIDEO LINE DRIVERS
ADC PREAMPLIFIERS
ACTIVE FILTERS
LOW-NOISE INTEGRATORS
PORTABLE TEST EQUIPMENT
OPTICAL CHANNEL AMPLIFIERS
LOW-POWER, BASEBAND AMPLIFIERS
CCD IMAGING CHANNEL AMPLIFIERS
OPA650 AND OPA620 UPGRADE
RELATED PRODUCTS
SINGLES
OPA354
OPA690
—
—
—
DUALS
OPA2354
OPA2690
OPA2652
OPA2822
—
TRIPLES
—
OPA3690
—
—
—
QUADS
OPA4354
—
—
—
OPA4820
+5V
FEATURES
CMOS RR Output
High Slew Rate
SOT23-8
Low Noise
Quad OPA820
+5V
V
IN
OPA820
50Ω
100pF
−5V
402Ω
2kΩ
IN
402Ω
2kΩ
0.1µF
(+2V)
REFB
(+1V)
VREF
ADS850
14−
Bit
10MSPS
R
S
0.1µF 24.9Ω
2kΩ
2kΩ
IN
REFT
(+3V)
SEL
AC-Coupled, 14-Bit ADS850 Interface
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.
All trademarks are the property of their respective owners.
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
2004, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
