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THS4521-HT

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High Temperature, Very Low Power, Negative Rail Input, Rail-to-Rail Output, Differential Amp

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Data sheet

THS4521-HT

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.6 BW at Acl (MHz) 104 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 377.5 Architecture Bipolar, Fully Differential ADC Driver Vn at flatband (typ) (nV√Hz) 4.6 Iq per channel (typ) (mA) 1.1 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 5 Operating temperature range (°C) -55 to 210 Iout (typ) (mA) 35 2nd harmonic (dBc) 96 3rd harmonic (dBc) 91.5 Frequency of harmonic distortion measurement (MHz) 0.001 GBW (typ) (MHz) 81 Input bias current (max) (pA) 900000 Features Shutdown CMRR (typ) (dB) 105 Rating High Temp
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.6 BW at Acl (MHz) 104 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 377.5 Architecture Bipolar, Fully Differential ADC Driver Vn at flatband (typ) (nV√Hz) 4.6 Iq per channel (typ) (mA) 1.1 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 5 Operating temperature range (°C) -55 to 210 Iout (typ) (mA) 35 2nd harmonic (dBc) 96 3rd harmonic (dBc) 91.5 Frequency of harmonic distortion measurement (MHz) 0.001 GBW (typ) (MHz) 81 Input bias current (max) (pA) 900000 Features Shutdown CMRR (typ) (dB) 105 Rating High Temp
CFP (HKJ) 8 38.985 mm² 6.9 x 5.65 CFP (HKQ) 8 38.985 mm² 6.9 x 5.65 DIESALE (KGD) — See data sheet SOIC (D) 8 29.4 mm² 4.9 x 6
  • Fully Differential Architecture
  • Bandwidth: 40.7 MHz (210°C)
  • Slew Rate: 353.5 V/µs (210°C)
  • HD2: –96 dBc at 1 kHz
    (1 VRMS, RL = 1 kΩ) (210°C)
  • HD3: –91.5 dBc at 1 kHz
    (1 VRMS, RL = 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)
  • Fully Differential Architecture
  • Bandwidth: 40.7 MHz (210°C)
  • Slew Rate: 353.5 V/µs (210°C)
  • HD2: –96 dBc at 1 kHz
    (1 VRMS, RL = 1 kΩ) (210°C)
  • HD3: –91.5 dBc at 1 kHz
    (1 VRMS, RL = 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)

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.

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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Technical documentation

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Type Title Date
* Data sheet Very-Low Power, Negative Rail Input, Rail-to-Rail Output, Differential Amp datasheet (Rev. D) 30 May 2012
* Radiation & reliability report THS4521HKJ_HKQ Reliability Report 20 Sep 2012
* Radiation & reliability report THS4521HD Reliability Report (Rev. A) 17 Aug 2012
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
EVM User's guide Harsh Environment Acquisition Terminal (H.E.A.T.) System Evaluation Kit (Rev. D) 24 Jul 2015
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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Evaluation board

THS4521EVM — THS4521 evaluation module

The THS4521EVM is an evaluation module for the single, THS4521 in the D (8-lead SOIC) package.

The THS4521EVM is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The EVM is ready to connect to power, signal source, and test instruments through the use of (...)

User guide: PDF
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GUI for evaluation module (EVM)

SLAC498 — HEATEVM GUI Software

Supported products & hardware

Supported products & hardware

Products
Instrumentation amplifiers
INA333-HT — High Temperature Low Power, Precision Instrumentation Amplifier
Die & wafer services
SM470R1B1M-HT — High Temperature ARM7TDMI™ Flash Microcontroller
Fully differential amplifiers
THS4521-HT — High Temperature, Very Low Power, Negative Rail Input, Rail-to-Rail Output, Differential Amp
RS-485 & RS-422 transceivers
SN65HVD11-HT — High Temperature 3.3-V RS-485 Transceiver
Precision ADCs
ADS1278-HT — High-Temperature Quad/Octal, Simultaneous-Sampling, 24-Bit Analog-to-Digital Converter
Precision op amps (Vos<1mV)
OPA211-HT — High Temperature 1.1nV/rtHz Noise, Low Power, Precision Operational Amplifier OPA2333-HT — High-temperature, 1.8-V, 17-µA, two-channel, micropower zero-drift CMOS operational amplifier
Series voltage references
REF5025-HT — High Temperature Low Noise, Very Low Drift, Precision Voltage References
CAN transceivers
SN65HVD233-HT — High Temperature 3.3-V CAN Transceiver
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Simulation tool

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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Reference designs

TIDA-00002 — Harsh Environment Acquisition Terminal (HEAT) EVM Platform for High Temperature Applications

The HEATEVM is a MCM intended to provide a high temperature platform for signal conditioning and processor evaluation. The module consists of a complete chain of components designed to withstand extreme operating temperatures up to 200 °C. The PCB is made with polymide material also suited for (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
CFP (HKJ) 8 Ultra Librarian
CFP (HKQ) 8 Ultra Librarian
DIESALE (KGD) —
SOIC (D) 8 Ultra Librarian
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