CS5571
CS5571 is High-throughput ADC manufactured by Cirrus Logic.
6/25/07 14:12
±2.5 V / 5 V, 100 k Sps, 16-bit, High-throughput ∆Σ ADC
Features
& Description
Single-ended Analog Input On-chip Buffers for High Input Impedance Conversion Time = 10 µS Settles in One Conversion
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General Description
The CS5571 is a single-channel, 16-bit analog-to-digital converter capable of 100 k Sps conversion rate. The input accepts a single-ended analog input signal. On-chip buffers provide high input impedance for both the AIN input and the VREF+ input. This significantly reduces the drive requirements of signal sources and reduces errors due to source impedances. The CS5571 is a delta-sigma converter capable of switching multiple input channels at a high rate with no loss in throughput. The ADC uses a low-latency digital filter architecture. The filter is designed for fast settling and settles to full accuracy in one conversion. The converter's 16-bit data output is in serial format, with the serial port acting as either a master or a slave. The converter is designed to support bipolar, ground-referenced signals when operated from ±2.5V analog supplies. The CS5571 uses self-calibration to achieve low offset and gain errors. The converter achieves a S/N of 92 d B. Linearity is 0.0007% of full scale. The converter can operate from an analog supply of 0-5V or from ±2.5V. The digital interface supports standard logic operating from 1.8, 2.5, or 3.3 V. ORDERING INFORMATION: See Ordering Information on page 31.
Linearity Error = 0.0007% Signal-to-Noise = 92 d B S/(N + D) = 91 d B DNL = ±0.1 LSB Max. Self-calibration:
- Maintains accuracy over time & temperature.
Simple three/four-wire serial interface Power Supply Configurations:
- Analog: +5V/GND; IO: +1.8V to +3.3V
- Analog: ±2.5V; IO: +1.8V to +3.3V
Power Consumption:
- ADC Input Buffers On: 85 m W
- ADC Input Buffers Off: 60 m W
V1+
V2+
VREF+ VREFDIGITAL FILTER LOGIC SERIAL INTERFACE SMODE CS SCLK ADC AIN A
SDO RDY
BUFEN...
