1 Features

• 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)

2 Applications

• Low-Power SAR and ΔΣ ADC Drivers
• Low-Power Differential Drivers
• Low-Power Differential Signal Conditioning
• Low-Power, High-Performance Differential Audio Amplifiers

3 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.

1. For all available packages, see the package option addendum at the end of the datasheet.

THS4521 and ADS1278 Combined Performance

For more information on this circuit, view SBAU197.