THS4521 Very low power rail-to-rail output fully differential amplifier | TI.com

THS4521 (ACTIVE)

Very low power rail-to-rail output fully differential amplifier

 

Recommended alternative parts

  • THS4551  - The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.   The THS4551 offers significantly lower noise, offset and drift and improved harmonic distortion compared to the THS4521

Description

The 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 differential amplifiers is characterized for operation over the full industrial temperature range from –40°C to +85°C.

Features

  • 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%) at
    1 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)

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 CMRR (Typ) (dB)
THS4521 Order now 1     2.5     5.5     145     1     490     4.6     1.14     In to V-
Out    
2     -40 to 85     SOIC | 8
VSSOP | 8    
55     133     141     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
95     900000     0.001     102    
THS4551 Order now 1     2.7     5.4     150     1     220     3.3     1.35     In to V-
Out    
0.175     -40 to 125     QFN | 10
VQFN | 16
VSSOP | 8    
45     128     139     10QFN: 4 mm2: 2 x 2 (QFN | 10)
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
135     1500000     0.1     110