OPA1S2384 Datasheet, PDF (1/23 Pages) Texas Instruments – 250-MHz, CMOS Transimpedance Amplifier (TIA) with Integrated Switch and Buffer

OPA1S2384
OPA1S2385
www.ti.com
SBOS645A – DECEMBER 2012 – REVISED JUNE 2013
250-MHz, CMOS Transimpedance Amplifier (TIA)
with Integrated Switch and Buffer
Check for Samples: OPA1S2384, OPA1S2385
FEATURES
1
•2 Wide Bandwidth: 250 MHz
• High Slew Rate: 150 V/μs
• Rail-to-Rail Input/Output (I/O)
• Fast Settling
• Low Input Bias Current: 3 pA
• High Input Impedance: 10¹³ Ω || 2 pF
• SPST Switch:
– Low On-Resistance: 4 Ω
– Low Charge Injection: 1 pC
– Low Leakage Current: 10 pA
• Flexible Configuration:
– Transimpedance Gain
– External Hold Capacitor
– Post-Gain
• Single Supply: +2.7 V to +5.5 V
• Quiescent Current: 9.2 mA
• Small Package: 3-mm × 3-mm SON-10
• OPA1S2384: Internal Switch Active High
• OPA1S2385: Internal Switch Active Low
APPLICATIONS
• Communications:
– Optical Networking: EPON, GPON
– Signal Strength Monitors
– Burst-Mode RSSI
• Photodiode Monitoring
• Fast Sample-and-Hold Circuits
• Charge Amplifiers
• High-Speed Integrators
DESCRIPTION
The OPA1S2384 and OPA1S2385 (OPA1S238x)
combine high bandwidth, FET-input operational
amplifiers with a fast SPST CMOS switch designed
for applications that require the tracking and capturing
of fast signals.
By providing a 250-MHz gain bandwidth product and
rail-to-rail input/output swings in single-supply
operation, the OPA1S238x is capable of wideband
transimpedance gain and large output signal swing
simultaneously. Low input bias current and voltage
noise (6 nV/√Hz) make it possible to amplify
extremely low-level input signals for maximum signal-
to-noise ratio.
The characteristics of the OPA1S238x make this
device ideally suited for use as a wideband
photodiode amplifier.
In addition, the CMOS switch and subsequent buffer
amplifier allow the OPA1S238x to be easily
configured as a fast sample-and-hold circuit. The
external hold capacitor and post-gain options make
the OPA1S238x easily adaptable to a wide range of
speed and accuracy requirements. Note that the
OPA1S2384 closes the internal switch with a logic-
high signal, and the OPA1S2385 closes the internal
switch with a logic-low signal.
The OPA1S238x are optimized for low-voltage
operation from as low as +2.7 V up to +5.5 V. These
devices are specified for a temperature range of
–40°C to +85°C.
V- V+ SC⁽¹⁾
OPA1S2384/5
+IN A
A
-IN A
B
OUT B
OUT A IN S +IN B -IN B
(1) The OPA1S2384 internal switch is active
high; the OPA1S2384 internal switch is
active low.
1
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.
2
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 © 2012–2013, Texas Instruments Incorporated