Datasheet
FEATURES
D HIGH BANDWIDTH: 220MHz (G = +2)
D HIGH OUTPUT CURRENT: ±85mA
D LOW INPUT NOISE: 2.5nV/√Hz
D LOW SUPPLY CURRENT: 5.7mA/ch
D FLEXIBLE SUPPLY VOLTAGE:
±2V to ±6.3V Dual Supply
+4V to +12.6V Single Supply
D EXCELLENT DC ACCURACY:
Maximum 25°C Input Offset Voltage = 0.8mV
Maximum 25°C Input Offset Current = 500nA
APPLICATIONS
D LOW-COST VIDEO LINE DRIVERS
D ADC PREAMPS
D ACTIVE FILTERS
D LOW-NOISE INTEGRATORS
D PORTABLE TEST EQUIPMENT
D OPTICAL CHANNEL AMPLIFIERS
D LOW-POWER, BASEBAND AMPLIFIERS
D CCD IMAGING CHANNEL AMPLIFIERS
D OPA4650 UPGRADE
DESCRIPTION
The OPA4820 provides a wideband, unity-gain stable,
voltage-feedback amplifier with a very low input noise
voltage and high output current using a low 5.7mA/ch
supply current. At unity-gain, the OPA4820 gives
> 600MHz bandwidth with < 1 dB peaking. The OPA4820
complements this high-speed operation with excellent DC
precision in a low-power device. A worst-case input offset
voltage of ±0.8mV and an offset current of ±500nA give
excellent absolute DC precision for pulse amplifier
applications.
Minimal input and output voltage swing headroom allow
the OPA4820 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 quad pinout SO-14 package
while emerging high-density portable applications can use
the TSSOP-14.
RELATED PRODUCTS
SINGLES DUALS TRIPLES QUADS FEATURES
OPA354 OPA2354 — OPA4354 CMOS RR Output
OPA690 OPA2690 OPA3690 — High Slew Rate
— OPA2652 — — SOT23-8
— OPA2822 — — Low-Noise
OPA820 — — — Single Channel
Low-Noise Transceiver Interface
OPA4820
SBOS317D − SEPTEMBER 2004 − REVISED AUGUST 2008
Quad, Unity-Gain Stable, Low-Noise,
Voltage-Feedback Operational Amplifier
! !
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Copyright 2004−2008, Texas Instruments Incorporated
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.
+12V
1/4
OPA4820
AFE
1/4
OPA4820
402
Ω
402Ω
133
Ω
10kΩ
Transmit
Filter
10k
Ω
50
Ω
1:1
100Ω
Line
10dBm
3.5 Crest Factor
50Ω
2V
PP
+6V
Receiver
Filter
1/4
OPA4820
1/4
OPA4820
402
Ω
402Ω
14V
PP
V
CM
V
CM
800
Ω
800
Ω
402
Ω
402
Ω
V
CM