OPA843
OPA
843
SBOS268A – DECEMBER 2002 – OCTOBER 2003
Wideband, Low Distortion, Medium Gain,
Voltage-Feedback OPERATIONAL AMPLIFIER
FEATURES
q
HIGH BANDWIDTH: 260MHz (G = +5)
q
GAIN BANDWIDTH PRODUCT: 800MHz
q
LOW INPUT VOLTAGE NOISE: 2.0nV/
√Hz
q
VERY LOW DISTORTION: –96dBc (5MHz)
q
HIGH OPEN-LOOP GAIN: 110dB
q
FAST 12-BIT SETTLING: 10.5ns (0.01%)
q
LOW INPUT OFFSET VOLTAGE: 300
µ
V
q
OUTPUT CURRENT:
±
100mA
DESCRIPTION
The OPA843 provides a level of speed and dynamic range
previously unattainable in a monolithic op amp. Using a high
Gain Bandwidth (GBW), two gain-stage design, the OPA843
gives a medium gain range device with exceptional dynamic
range. The “classic” differential input complements this high
dynamic range with DC precision beyond most high-speed
amplifier products. Very low input offset voltage and current,
high Common-Mode Rejection Ratio (CMRR) and Power-
Supply Rejection Ratio (PSRR), and high open-loop gain
combine to give a high DC precision amplifier along with low
noise and high 3rd-order intercept.
12- to 16-bit converter interfaces will benefit from this combi-
nation of features. High-speed transimpedance applications
can be implemented with exceptional DC precision as well.
Differential configurations using two OPA843s can deliver
very low distortion to high output voltages, as shown below.
APPLICATIONS
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ADC/DAC BUFFER AMPLIFIER
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LOW DISTORTION “IF” AMPLIFIER
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ACTIVE FILTERS
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LOW-NOISE RECEIVER
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WIDEBAND TRANSIMPEDANCE
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TEST INSTRUMENTATION
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PROFESSIONAL AUDIO
q
OPA643 UPGRADE
+5V
OPA843 RELATED PRODUCTS
SINGLES
OPA842
OPA846
OPA847
INPUT NOISE
VOLTAGE (nV/
√Hz
)
2.6
1.2
0.85
GAIN-BANDWIDTH
PRODUCT (MHz)
200
1750
3900
OPA843
DIFFERENTIAL DISTORTION vs OUTPUT VOLTAGE
–85
G
D
= 10
R
L
= 400Ω
F = 5MHz
V
I
50Ω
1:1
132Ω
40.2Ω
402Ω
R
L
400Ω
V
O
= 10V
I
Harmonic Distortion (dBc)
–5V
–90
–95
2nd-Harmonic
–100
3rd-Harmonic
–105
40.2Ω
402Ω
+5V
OPA843
–110
1
10
Output Voltage Swing (Vp-p)
–5V
Very Low Distortion Differential Driver
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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 © 2002-2003, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
