THS4521-HT_15 Datasheet, PDF (1/27 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT,RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521-HT
www.ti.com
SBOS548D – APRIL 2011 – REVISED MAY 2012
VERY LOW POWER, NEGATIVE RAIL INPUT,
RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER
Check for Samples: THS4521-HT
FEATURES
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• Fully Differential Architecture
• Bandwidth: 40.7 MHz (210°C)
• Slew Rate: 353.5 V/μs (210°C)
• HD₂: –96 dBc at 1 kHz
(1 V_RMS, R_L = 1 kΩ) (210°C)
• HD₃: –91.5 dBc at 1 kHz
(1 V_RMS, R_L = 1 kΩ) (210°C)
• Input Voltage Noise: 19.95 nV/√Hz (f = 100 kHz)
• Open-Loop Gain: 90 dB (typ) (210°C)
• NRI—Negative Rail Input
• RRO—Rail-to-Rail Output
• Output Common-Mode Control (with Low
Offset and Drift)
• Power Supply:
– Voltage: 2.5 V (±1.25 V) to 3.3 V (±1.65 V)
– Current: 1.4 mA/ch (3.3 V)
• Power-Down Capability: 10 µA (typ) (210°C)
APPLICATIONS
• Down-Hole Drilling
• High Temperature Environments
SUPPORTS EXTREME TEMPERATURE
APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Extreme (–55°C/210°C)
Temperature Range⁽¹⁾
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
• Texas Instruments high temperature products
utilize highly optimized silicon (die) solutions
with design and process enhancements to
maximize performance over extended
temperatures.
(1) Custom temperature ranges available
DESCRIPTION
The THS4521 is a very low-power, fully differential op amp with rail-to-rail output and an input common-mode
range that includes the negative rail. This amplifier is designed for low-power data acquisition systems and high-
density applications where power dissipation is a critical parameter, and provides exceptional performance in
audio applications.
The THS4521 features accurate output common-mode control that allows for dc-coupling when driving analog-to-
digital converters (ADCs). This control, coupled with an input common-mode range below the negative rail as
well as rail-to-rail output, allows for easy interfacing between single-ended, ground-referenced signal sources.
Additionally, this device is ideally suited for driving both successive-approximation register (SAR) and delta-
sigma (ΔΣ) ADCs using only a single 2.5-V to 3.3-V and ground power supply.
The THS4521 is characterized for operation from –55°C to 210°C.
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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 © 2011–2012, Texas Instruments Incorporated