THS4531 Ultra low power 0.25mA, RRO, fully differential amplifier | TI.com

THS4531 (ACTIVE) Ultra low power 0.25mA, RRO, fully differential amplifier

 

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

Parametrics

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Part number Order Number of channels (#) Total supply voltage (Min) (+5V=5, +/-5V=10) Total supply voltage (Max) (+5V=5, +/-5V=10) BW @ Acl (MHz) Acl, min spec gain (V/V) Slew rate (Typ) (V/us) Vn at flatband (Typ) (nV/rtHz) Iq per channel (Typ) (mA) Rail-to-rail Vos (offset voltage @ 25 C) (Max) (mV) Operating temperature range (C) Package Group Output current (Typ) (mA) 2nd harmonic (dBc) 3rd harmonic (dBc) Package size: mm2:W x L (PKG) GBW (Typ) (MHz) Input bias current (Max) (pA) @ MHz Gain (Max) (dB) CMRR (Typ) (dB)
THS4531 Order now 1     2.5     5.5     36     1     220     10     0.25     Out     1     -40 to 125     QFN | 10
SOIC | 8
VSSOP | 8    
26     128     137     10QFN: 4 mm2: 2 x 2 (QFN | 10)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
30     210000     0.001     -15     116