THS4551IRUNT

The THS4551 fully differential amplifier provides a simple interface between a single-ended source and a differential output, meeting the requirements of various high-precision analog-to-digital converters (ADCs). This device combines excellent DC accuracy, low noise, and robust capacitive load driving capability, making it ideal for data acquisition systems with high-precision requirements. Meanwhile, when the amplifier works in conjunction with the ADC, excellent signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) can be achieved. The THS4551 has the required negative power supply rail input, which can be used to connect DC-coupled, ground-centered source signals to single-supply differential input ADCs. The device has ultra-low DC error and drift, meeting the input requirements of emerging 16- to 20-bit successive approximation register (SAR) ADCs. With the ADC common-mode input requirements ranging from 0.7V to over 3.0V, the wide-range output common-mode control supports the ADC to operate with a power supply from 1.8V to 5V. The THS4551 device is rated to operate over a wide temperature range from –40°C to +125°C and is available in an 8-pin very thin shrink small outline package (VSSOP), a 16-pin very thin quad flat no-lead (VQFN) package, and a 10-pin thin quad flat no-lead (WQFN) package.

Applications

• 24-bit Δ-Σ ADC driver
• 16-bit to 20-bit differential high-speed SAR driver
• Differential active filter
• Differential transimpedance amplifier
• Pin-compatible upgrade to THS4521 (VSSOP-8 only)

Key features

• Bandwidth: 150MHz (G = 1 V/V)
• Differential Output Slew Rate: 220V/μs
• Gain Bandwidth Product: 135MHz
• Negative Rail Input (NRI), Rail-to-Rail Output (RRO)
• Wide Output Common-Mode Control Range
• Single-Supply Operating Voltage Range: 2.7V to 5.4V
• Trimmed Supply Current: 1.37mA at 5V
• Input Offset Voltage at 25°C: ±175μV (maximum)
• Input Offset Voltage Drift: ±1.8μV/°C (maximum)
• Differential Input Voltage Noise: 3.3nV/√Hz
• HD2: -128dBc (at 2VPP, 100kHz)
• HD3: -139dBc (at 2VPP, 100kHz)
• Settling Time under 50ns: 4V step, 0.01% tolerance
• 18-Bit Settling Time: 4V step, less than 500ns