AD7706BNZ

AD7706BNZ is a 3-channel, 16bit, sigma-delta ADC. This device can accept low-level input signals directly from a transducer and produce serial digital output. The devices employ a Σ-Δ conversion technique to realize upto 16 bits of no-missing codes performance. The selected input signal is applied to a proprietary, programmable-gain front end based around an analogue modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via an on-chip control register, allowing adjustment of the filter cut-off and output update rate. It is ideal for use in smart, microcontroller, or DSP-based systems. This device features a serial interface that can be configured for 3-wire operation. Gain settings, signal polarity, and update rate selection can be configured in software using the input serial port.

• 3 pseudo differential input channel ADC, programmable gain front end: gains from 1 to 128
• 3-wire serial interface, gain drift is 0.5ppm of FSR/°C typical
• Ability to buffer the analogue input, integral nonlinearity is ±0.003% of FSR maximum
• Gain drift is 0.5ppm of FSR/°C typical at (VDD = 3V or 5V)
• Common-mode rejection ratio is 96dB typical at (gain = 1, VDD = 3V or 5V)
• Standby (power-down) current is 16μA max at (external MCLK IN = 0V or VDD, VDD = 5V)
• Bipolar zero drift is 0.5μV/°C typical at (VDD = 3V or 5V)
• Floating state leakage current is ±10μA maximum at (VDD = 3V or 5V)
• Power supply current is 0.32mA max at (BUF bit = 0, fCLKIN = 1MHz, gains of 1 to 128)
• Operating temperature range from -40°C to +85°C, 16-lead PDIP package

Uwagi

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