Ultra low power 0.25mA, RRO, fully differential amplifier - THS4531

THS4531 (ACTIVE)

Ultra low power 0.25mA, RRO, fully differential amplifier

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Description

The THS4531 is a low-power, fully-differential op amp with input common-mode range below the negative rail and rail-to-rail output. The device is designed for low-power data acquisition systems and high density applications where power consumption and dissipation is critical.

The device features accurate output common-mode control that allows for dc coupling when driving analog-to-digital converters (ADCs). This control, coupled with the input common-mode range below the negative rail and rail-to-rail output, allows for easy interface from single-ended ground-referenced signal sources to successive-approximation registers (SARs), and delta-sigma (ΔΣ) ADCs using only single-supply 2.5-V to 5-V power. The THS4531 is also a valuable tool for general-purpose, low-power differential signal conditioning applications.

The THS4531 is characterized for operation over the extended industrial temperature range from –40°C to +125°C. The following package options are available:

  • 8-pin SOIC (MSOP) and VSSOP (D and DGK)
  • 10-pin WQFN (RUN)

Features

  • Ultra Low Power:
    • Voltage: 2.5 V to 5.5 V
    • Current: 250 µA
    • Power-Down Mode: 0.5 µA (typ)
  • Fully-Differential Architecture
  • Bandwidth: 36 MHz
  • Slew Rate: 200 V/µs
  • THD: –120 dBc at 1 kHz (1 VRMS, RL= 2 kΩ)
  • Input Voltage Noise: 10 nV/√Hz (f = 1 kHz)
  • High DC Accuracy:
    • VOS Drift: ±4 µV/°C (–40°C to +125°C)
    • AOL: 114 dB
  • Rail-to-Rail Output (RRO)
  • Negative Rail Input (NRI)
  • Output Common-Mode Control

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Parametrics Compare all products in Fully Differential Amplifier

 
Number of Channels (#)
Vs (Min) (V)
Vs (Max) (V)
Slew Rate (Typ) (V/us)
Vn at Flatband (Typ) (nV/rtHz)
Iq per channel (Max) (mA)
Io (Typ) (mA)
2nd Harmonic (dBc)
3rd Harmonic (dBc)
BW @ Acl (MHz)
Iib (Max) (nA)
Vos (Max) (mV)
Rating
Pin/Package
Operating Temperature Range (C)
Approx. Price (US$)
THS4531
1    
2.5    
5.5    
220    
10    
0.25    
26    
128    
137    
36    
210    
1    
Catalog    
8SOIC
10QFN
8VSSOP    
-40 to 125    
1.10 | 1ku    

Companion parts

Part # Name Product Family Comments
ADS8317   16-Bit, Pseudo Bipolar, Fully Diff Input, 250kSPS Serial Out, 2.7V to 5.5V Micro Power Sampling ADC   ANALOG TO DIGITAL CONVERTER - PRECISION ADC (<=10MSPS)    15V low power 16 bit ADC.  
ADS1278   Octal, 144kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC   ANALOG TO DIGITAL CONVERTER - PRECISION ADC (<=10MSPS)    Match to achieve higher performance  
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