OPA685 Datasheet, PDF (1/28 Pages) Burr-Brown (TI) – Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER With Disable TM

®
OPA685
OPA685
OPA685
For most current data sheet and other product
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TM _{Ultra-Wideband, Current-Feedback}
OPERATIONAL AMPLIFIER With Disable
FEATURES
q GAIN = +2 BANDWIDTH (900MHz)
q GAIN = +8 BANDWIDTH (420MHz)
q OUTPUT VOLTAGE SWING: ±3.6V
q ULTRA-HIGH SLEW RATE: 4200V/µs
q 3RD-ORDER INTERCEPT: > 40dBm (f < 50MHz)
q LOW POWER: 129mW
q LOW DISABLED POWER: 3mW
APPLICATIONS
q LOW COST PRECISION IF AMPLIFIER
q CABLE MODEM UPSTREAM DRIVER
q BROADBAND VIDEO LINE DRIVER
q VERY WIDEBAND ADC BUFFER
q PORTABLE INSTRUMENTS
q ACTIVE FILTERS
q ARB WAVEFORM OUTPUT DRIVER
DESCRIPTION
The OPA685 is a very high bandwidth, current-feed-
back op amp that combines exceptional 4200V/µs 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’s low 12.9mA supply current is pre-
cisely trimmed at +25°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 320µA. 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
40
OPA685
50Ω _Matching
Network
50Ω
30
50Ω
Source _50Ω
–5V
400Ω
SAW
Filter
20
Low Distortion, 12dB Gain SAW Driver
10
0
50
100
150
200
250
Center Frequency (MHz)
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone]
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1999 Burr-Brown Corporation}
PDS-1499A
Printed in U.S.A. April, 1999