OPA843 Datasheet, PDF (1/22 Pages) Burr-Brown (TI) – Wideband, Low Distortion, Medium Gain, Voltage-Feedback OPERATIONAL AMPLIFIER

OPA843
OPA843
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: 300µV
q OUTPUT CURRENT: ±100mA
APPLICATIONS
q ADC/DAC BUFFER AMPLIFIER
q LOW DISTORTION “IF” AMPLIFIER
q ACTIVE FILTERS
q LOW-NOISE RECEIVER
q WIDEBAND TRANSIMPEDANCE
q TEST INSTRUMENTATION
q PROFESSIONAL AUDIO
q OPA643 UPGRADE
+5V
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.
OPA843 RELATED PRODUCTS
SINGLES
INPUT NOISE
VOLTAGE (nV/√Hz )
OPA842
2.6
OPA846
1.2
OPA847
0.85
GAIN-BANDWIDTH
PRODUCT (MHz)
200
1750
3900
OPA843
1:1
V_I
50Ω
40.2Ω
132Ω
40.2Ω
–5V
402Ω
402Ω
+5V
R_L
400Ω
V_O = 10V_I
OPA843
–5V
Very Low Distortion Differential Driver
DIFFERENTIAL DISTORTION vs OUTPUT VOLTAGE
–85
G_D = 10
R_L = 400Ω
–90 F = 5MHz
–95
–100
2nd-Harmonic
–105
3rd-Harmonic
–110
1
10
Output Voltage Swing (Vp-p)
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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.
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