Very low power rail-to-rail output fully differential amplifier - THS4521

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)

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Parametrics Compare all products in High-Speed Op Amps (GBW>=50MHz)

 
Architecture
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)
Vn at 1kHz (Typ) (nV/rtHz)
Iq per channel (Typ) (mA)
Vos (Offset Voltage @ 25C) (Max) (mV)
Rail-to-Rail
Features
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
CMRR (Typ) (dB)
Input Bias Current (Max) (pA)
Offset Drift (Typ) (uV/C)
GBW (Typ) (MHz)
Output Current (Typ) (mA)
2nd Harmonic (dBc)
3rd Harmonic (dBc)
@ MHz
THS4521 THS4522 THS4524 THS4531A THS4532 THS4541 THS4551
Voltage FB    Voltage FB    Fully Differential
Voltage FB   
Fully Differential
Voltage FB   
Fully Differential
Voltage FB   
Fully Differential
Voltage FB   
Bipolar
Fully Differential
Voltage FB   
1    2    4    1    2    1    1   
2.5    2.5    2.5    2.5    2.5    2.7    2.7   
5.5    5.5    5.5    5.5    5.5    5.4    5.4   
145    145    145    36    36    620    150   
1    1    1    1    1    1    1   
490    490    490    220    220    1500    220   
4.6    4.6    4.6    10    10    2.2    3.3   
5.2    5.2    5.2    10    10    33    3.3   
1.14    1.14    1.14    0.25    0.25    10.1    1.35   
2    2    2    0.4    0.4    0.45    0.175   
In to V-
Out   
In to V-
Out   
In to V-
Out   
In to V-
Out   
In to V-
Out   
In to V-
Out   
In to V-
Out   
Shutdown    Shutdown    Shutdown    Small Size
Shutdown   
Shutdown    Small Size
Shutdown   
Small Size
Shutdown   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
SOIC
VSSOP   
TSSOP    TSSOP    QFN
SOIC
VSSOP   
TSSOP    QFN
VQFN   
QFN
VQFN
VSSOP   
8SOIC: 29 mm2: 6 x 4.9(SOIC)
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)    38TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)    10QFN: 4 mm2: 2 x 2(QFN)
8SOIC: 29 mm2: 6 x 4.9(SOIC)
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)    10QFN: 4 mm2: 2 x 2(QFN)
16VQFN: 9 mm2: 3 x 3(VQFN)   
10QFN: 4 mm2: 2 x 2(QFN)
16VQFN: 9 mm2: 3 x 3(VQFN)
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
102    102    102    116    116    100    110   
900000    900000    900000    250000    250000    13000000    1500000   
2    2    2    3    3    0.5    0.45   
95    95    95    27    27    850    135   
55    55    55    26    26    100    45   
133    133    133    129    128    140    128   
141    141    141    138    137    140    139   
0.001    0.001    0.001    0.001    0.01    0.1    0.1   

Other qualified versions of THS4521

Version Part Number Definition
High-Temperature THS4521-HT High-Temperature product for harsh environments