THS4551IRUNR

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1. Describe

The THS4551IRUNR fully differential amplifier provides a simple interface from a single-ended source to the differential outputs required by a high-precision analog-to-digital converter (ADC). The device's excellent DC accuracy, low noise, and strong capacitive load drive make it ideal for data acquisition systems that require high accuracy along with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR). Amplifier and ADC combination. The THS4551IRUNR has the negative rail input required to connect a DC-coupled, ground-centered source signal to a single-supply differential input ADC. Very low DC error and drift terms support emerging 16- to 20-bit successive approximation register (SAR) input requirements. The wide-range output common-mode control supports ADCs operating from a 1.8V to 5V supply range with an ADC common-mode input requirement of 0.7V to greater than 3.0V. The THS4551 device operates over a wide temperature range: 40°C to +125°C, and is available in 8-lead VSSOP, 16-lead VQFN, and 10-lead WQFN packages.

2. Feature

    1. Bandwidth: 150 MHz (G = 1 V/V)

    2. Differential output slew rate: 220 V/µs

    3. Gain Bandwidth Product: 135 MHz

    4. Negative Rail Input (NRI), Rail-to-Rail Output (RRO)

    5. Wide output common mode control range

    6. Single Supply Operating Range: 2.7 V to 5.4 V

    7. Adjusted supply current: 1.37 mA at 5 V

    8. 25°C input offset: ±175 µV (max)

    9. Input offset voltage drift: ±1.8 µV/°C (max)

  10. Differential input voltage noise: 3.3 nV/√ Hz

  11. HD2: –128 dBc at 2 VPP, 100 kHz

  12. HD3: –139 dBc at 2 VPP, 100 kHz

  13. < 50ns settling time: 4V steps to 0.01%

  14. 18-bit setup time: 4V steps, < 500 ns

3. Application

    1. 24-bit, delta-sigma (ΔΣ) ADC driver

    2. 16- to 20-bit, differential, high-speed SAR driver

    3. Differential Active Filter

    4. Differential transimpedance amplifier

    5. Pin compatible upgrade to THS4521 (VSSOP-8 only)

4. Pin configuration

5. Pin Description