THS4521

SOIC (D)

8

19 mm² 3.91 x 4.9

VSSOP (DGK)

8

15 mm² 3 x 4.9

Fully Differential Architecture
Bandwidth: 145 MHz (A_V = 1 V/V)
Slew Rate: 490 V/µs
HD₂: –133 dBc at 10 kHz (1 V_RMS,
R_L = 1 kΩ)
HD₃: –141 dBc at 10 kHz (1 V_RMS,
R_L = 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 V_PP)
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)

Fully Differential Architecture
Bandwidth: 145 MHz (A_V = 1 V/V)
Slew Rate: 490 V/µs
HD₂: –133 dBc at 10 kHz (1 V_RMS,
R_L = 1 kΩ)
HD₃: –141 dBc at 10 kHz (1 V_RMS,
R_L = 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 V_PP)
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 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.

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.

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Technical documentation

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	Type	Title	Date
*	Data sheet	THS452x Very Low Power, Negative Rail Input, Rail-To-Rail Output, Fully Differential Amplifier datasheet (Rev. H)	18 Jun 2015
	Application note	High-speed overcurrent detection circuit (Rev. A)	17 Jan 2019
	E-book	The Signal e-book: A compendium of blog posts on op amp design topics	28 Mar 2017
	Technical article	How to minimize filter loss when you drive an ADC	20 Oct 2016
	Application note	Fully-Differential Amplifiers (Rev. E)	19 Sep 2016
	Technical article	Go differential to differentiate your precision design	11 Aug 2016
	Technical article	How to use a fully differential amplifier as a level shifter	13 Jul 2016
	Technical article	What you need to know about internal ESD protection on integrated circuits	02 Dec 2015
	More literature	Featured High Speed Differential Amplifiers	23 Oct 2012
	Analog design journal	Using single-supply fully diff. amps with neg. input voltages to drive ADCs	15 Nov 2010
	Application note	DC Output Errors in a Fully-Differential Amplifier	25 May 2010
	Analog design journal	Using fully differential op amps as attenuators, Part 3	04 Oct 2009
	User guide	THS4521/45222/4524EVM User's Guide	16 Jul 2009
	Analog design journal	Using fully differential op amps as attenuators, Part 2	14 Jul 2009
	Analog design journal	Using fully differential op amps as attenuators, Part 1	01 May 2009
	Analog design journal	Analysis of fully differential amplifiers	11 Mar 2005
	Analog design journal	Designing for low distortion with high-speed op amps	02 Mar 2005
	Application note	Noise Analysis for High Speed Op Amps (Rev. A)	17 Jan 2005

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