Very low power rail-to-rail output fully differential amplifier 8-SOIC -40 to 85


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  • Part Number : THS4521IDR

  • Package/Case : 8-SOIC

  • Brands : TI

  • Components Categories : AmplifiersInstrumentation, OP Amps, Buffer Amps

  • Datesheet : THS4521IDR DataSheet (PDF)

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Overview of THS4521IDR

Description for the THS4521The THS4521, THS4522, and THS4524 family of devices are very low-power, fully differential amplifiers with rail-to-rail output and an input common-mode range that includes the negative rail. These amplifiers are designed for low-power data acquisition systems and high-density applications where power dissipation is a critical parameter, and provide exceptional performance in audio applications.The family includes single FDA (THS4521), dual FDA (THS4522), and quad FDA (THS4524) versions.These fully differential amplifiers feature 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, these devices are ideally suited for driving both successive-approximation register (SAR) and delta-sigma (ΔΣ) ADCs using only a single +2.5V to +5V and ground power supply.The THS4521, THS4522, and THS4524 family of fully differentialamplifiers is characterized for operation over the full industrial temperature rangefrom –40°C to +85°C.


Key Features

Features for the THS4521

  • Fully Differential Architecture
  • Bandwidth: 145 MHz (AV = 1 V/V)
  • Slew Rate: 490 V/µs
  • HD2: –133 dBc at 10 kHz (1 VRMS, RL = 1 kΩ)
  • HD3: –141 dBc at 10 kHz (1 VRMS, RL = 1 kΩ)
  • Input Voltage Noise: 4.6 nV/√Hz(f = 100 kHz)
  • THD+N: –112dBc (0.00025%) at1 kHz (22-kHz BW, G = 1, 5 VPP)
  • Open-Loop Gain: 119 dB (DC)
  • NRI–Negative Rail Input
  • RRO–Rail-to-Rail Output
  • Output Common-Mode Control (with Low Offset)
  • Power Supply:
    • Voltage: +2.5 V (±1.25 V) to +5.5 V (±2.75 V)
    • Current: 1.14 mA/ch
  • Power-Down Capability: 20 µA (typical)


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Source Content uid THS4521IDR Pbfree Code Yes
Rohs Code Yes Part Life Cycle Code Active
Ihs Manufacturer TEXAS INSTRUMENTS INC Part Package Code SOIC
Package Description SOP, SOP8,.25 Pin Count 8
Reach Compliance Code compliant ECCN Code EAR99
HTS Code 8542.33.00.01 Samacsys Manufacturer Texas Instruments
Average Bias Current-Max (IIB) 0.95 µA Bandwidth (3dB)-Nom 9.3 MHz
Bias Current-Max (IIB) @25C 0.9 µA Common-mode Reject Ratio-Min 80 dB
Common-mode Reject Ratio-Nom 102 dB Frequency Compensation YES
Input Offset Current-Max (IIO) 0.18 µA Input Offset Voltage-Max 2000 µV
JESD-30 Code R-PDSO-G8 JESD-609 Code e4
Length 4.9 mm Low-Bias NO
Low-Offset NO Micropower NO
Moisture Sensitivity Level 2 Neg Supply Voltage Limit-Max
Neg Supply Voltage-Nom (Vsup) Number of Functions 1
Number of Terminals 8 Operating Temperature-Max 85 °C
Operating Temperature-Min -40 °C Package Body Material PLASTIC/EPOXY
Package Code SOP Package Equivalence Code SOP8,.25
Packing Method TR Peak Reflow Temperature (Cel) 260
Power NO Power Supplies 3.3/5 V
Programmable Power YES Qualification Status Not Qualified
Seated Height-Max 1.75 mm Slew Rate-Nom 490 V/us
Supply Current-Max 1.25 mA Supply Voltage Limit-Max 5.5 V
Supply Voltage-Nom (Vsup) 3.3 V Surface Mount YES
Temperature Grade INDUSTRIAL Terminal Finish NICKEL PALLADIUM GOLD
Terminal Form GULL WING Terminal Pitch 1.27 mm
Terminal Position DUAL Time@Peak Reflow Temperature-Max (s) 30
Unity Gain BW-Nom 145000 Voltage Gain-Min 100000
Wideband YES

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