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OPA685 Datasheet

  • OPA685

  • Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER With ...

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廬
OPA
685
OPA
685
OPA685
For most current data sheet and other product
information, visit www.burr-brown.com
Ultra-Wideband, Current-Feedback
OPERATIONAL AMPLIFIER With Disable
TM
FEATURES
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GAIN = +2 BANDWIDTH (900MHz)
GAIN = +8 BANDWIDTH (420MHz)
OUTPUT VOLTAGE SWING:
鹵
3.6V
ULTRA-HIGH SLEW RATE: 4200V/
碌
s
3RD-ORDER INTERCEPT: > 40dBm (f < 50MHz)
LOW POWER: 129mW
LOW DISABLED POWER: 3mW
APPLICATIONS
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LOW COST PRECISION IF AMPLIFIER
CABLE MODEM UPSTREAM DRIVER
BROADBAND VIDEO LINE DRIVER
VERY WIDEBAND ADC BUFFER
PORTABLE INSTRUMENTS
ACTIVE FILTERS
ARB WAVEFORM OUTPUT DRIVER
DESCRIPTION
The OPA685 is a very high bandwidth, current-feed-
back op amp that combines exceptional 4200V/碌s slew
rate and low input voltage noise to deliver a precision
low cost, high dynamic range Intermediate Frequency
(IF) amplifier. Optimized for high gain operation, the
OPA685 is ideally suited to buffering Surface Acoustic
Wave (SAW) filters in an IF strip or delivering high
output power at low distortion for cable modem up-
stream line drivers. Even higher bandwidth at lower
gains gives a 900MHz video line driver for high
resolution workstation graphics.
The OPA685鈥檚 low 12.9mA supply current is pre-
cisely trimmed at +25擄C. This trim, along with a low
temperature drift, guarantees low system power over-
temperature. System power may be further reduced
using the optional disable control pin. Leaving this pin
open, or holding it HIGH, gives normal operation. If
pulled LOW, the OPA685 supply current drops to less
than 320碌A(chǔ). This power-savings feature, along with
exceptional single +5V operation, and ultra-small
SOT23-6 packaging, make the OPA685 ideal for por-
table communications requirements.
OPA685 RELATED PRODUCTS
SINGLES
OPA658
OPA681
OPA682
DUALS
OPA2658
OPA2681
OPA2682
TWO-TONE, 3rd-ORDER
INTERMODULATION INTERCEPT
50
+5V
Output Intercept (dBm)
40
50鈩?/div>
OPA685
Matching
Network
50鈩?/div>
SAW
Filter
30
50鈩?/div>
Source
鈥?V
50鈩?/div>
400鈩?/div>
20
Low Distortion, 12dB Gain SAW Driver
10
0
50
100
150
200
250
Center Frequency (MHz)
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111
Twx: 910-952-1111 鈥?Internet: http://www.burr-brown.com/ 鈥?Cable: BBRCORP 鈥?Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
漏
1999 Burr-Brown Corporation
PDS-1499A
Printed in U.S.A. April, 1999

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