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THS4521 Datasheet(PDF) 24 Page - Texas Instruments

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Part # THS4521
Description  THS4561 Low-Power, High Supply Range, 60-MHz, Fully Differential Amplifier
PDF  51 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

THS4521 Datasheet(HTML) 24 Page - Texas Instruments

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9 Detailed Description
9.1 Overview
The THS4561 is a fully differential amplifier featuring an extremely flexible supply voltage range of 2.85 V to
12.6 V, which makes this device an excellent choice for driving differential ADCs and buffering DAC outputs. This
device features a low-power mode with a unique active-pullup resistor (not a conventional pullup resistor) that
improves EMI reliability of the shutdown pin when left floating. This pin draws very little bias current when
enabled, but increases the bias current as it nears the threshold point of shutdown. The increased current
prevents the pin from unintentionally turning the device off in the presence of EMI on the disable pin. Similar to
other fully differential amplifiers, the THS4561 also includes an output common-mode control pin that can be
used to independently set the output common mode to match that of an ADC or other load circuit.
9.2 Functional Block Diagram
VS+
IN±
+
±
High-AOL
Differential I/O
Amplifier
IN+
400 k
OUT+
OUT±
+
±
+
±
VCM
Error
Amplifier
VOCM
VS+
400 k
PD
CMOS
Buffer
VS±
8.5
8.5
FB±
(RGT Package)
FB+
(RGT Package)
VS±
2.4 pF
6 k
6 k
THS4561
SBOS874C – AUGUST 2017 – REVISED DECEMBER 2020
www.ti.com
24
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Copyright © 2020 Texas Instruments Incorporated
Product Folder Links: THS4561



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