THS4521

极低功耗轨至轨输出全差动放大器

The , 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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Fully Differential Architecture

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Bandwidth: 145 MHz AV = 1 V/V

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Slew Rate: 490 V/µs

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HD2: –133 dBc at 10 kHz 1 VRMS,

RL = 1 kΩ

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HD3: –141 dBc at 10 kHz 1 VRMS,

RL = 1 kΩ

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Input Voltage Noise: 4.6 nV/√Hz

f = 100 kHz

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THD+N: –112dBc 0.00025% at

1 kHz 22-kHz BW, G = 1, 5 VPP

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Open-Loop Gain: 119 dB DC

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NRI–Negative Rail Input

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RRO–Rail-to-Rail Output

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Output Common-Mode Control

with Low Offset

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Power Supply:

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Voltage: +2.5 V ±1.25 V to

+5.5 V ±2.75 V

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Current: 1.14 mA/ch

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Power-Down Capability: 20 µA typical