OPA689M Datasheet, PDF (1/22 Pages) Texas Instruments – GAIN +4 STABLE WIDEBAND VOLTAGE-LIMITING AMPLIFIER

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FEATURES
• High Linearity Near Limiting
• Fast Recovery From Overdrive: 2.4 ns
• Limiting Voltage Accuracy: ±15 mV
• –3-dB Bandwidth (G = 6): 260 MHz
• Stable for G ≥ 4
• Slew Rate: 1400 V/µs
• ±5-V and 5-V Supply Operation
• High-Gain Version of OPA688
OPA689M
GAIN +4 STABLE WIDEBAND
VOLTAGE-LIMITING AMPLIFIER
SGLS146B – MARCH 2003 – REVISED DECEMBER 2006
APPLICATIONS
• Transimpedance With Fast Overdrive
Recovery
• Fast Limiting ADC Input Buffers
• Low Propagation Delay Comparator
• Non-Linear Analog Signal Processing
• Difference Amplifier
• IF Limiting Amplifier
• AM Signal Generation
JD PACKAGE
(TOP VIEW)
NC 1
INVERTING INPUT 2
NON-INVERTING INPUT 3
−VCC 4
8 V_H
7 +VCC
6 OUTPUT
5 VL
NC - No internal connection
DESCRIPTION/ORDERING INFORMATION
The OPA689 is a wideband, voltage-feedback operational amplifier that offers bipolar output voltage limiting, and
is stable for gains ≥4. Two buffered limiting voltages take control of the output when it attempts to drive beyond
these limits. This new output limiting architecture holds the limiter offset error to ±15 mV. The operational
amplifier operates linearly to within 30 mV of the limits.
The combination of narrow nonlinear range and low limiting offset allows the limiting voltages to be set within
100 mV of the desired linear output range. A fast 2.4-ns recovery from limiting ensures that overdrive signals are
transparent to the signal channel. Implementing the limiting function at the output, as opposed to the input, gives
the specified limiting accuracy for any gain, and allows the OPA689 to be used in all standard operational
amplifier applications.
Nonlinear analog signal processing circuits benefit from the OPA689's sharp transition from linear operation to
output limiting. The quick recovery time supports high-speed applications.
The OPA689M is available in an industry-standard pinout in a CDIP-8 package. For lower gain applications
requiring output limiting with fast recovery, consider the OPA688M.
ORDERING INFORMATION
T_A
–55°C to 125°C
CDIP – JD
PACKAGE ⁽¹⁾
Tube
ORDERABLE PART NUMBER
TOP-SIDE MARKING
OPA689MJD
OPA689MJD
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2006, Texas Instruments Incorporated