CS5509-AS

Number of Converters :
Number of ADC Inputs :
Interface Type :
SNR :
Voltage Reference :
Supply Voltage - Max :
Supply Voltage - Min :
Resolution :
Packaging :
Mounting Style : SMD/SMT
Architecture : Delta-Sigma
Input Type : Voltage
Maximum Operating Temperature : + 85 C
Package / Case : SOIC-16
Maximum Power Dissipation : 2.25 mW
Conversion Rate : 0.2 KSPs


Description

The CS5509-AS is one member of the CS5509 series.The CS5509 is a single-supply, 16-bit, serial-output CMOS A/D converter. The CS5509 uses charge-balanced (delta-sigma) techniques to provide low-cost,high-resolution measurements at output word rates up to 200 samples per second.The on-chip digital filter offers superior line rejection at 50Hz and 60Hz when the device is operated from a 32.768 kHz clock (output word rate = 20 Sps).After the initial application of power, the CS5509 must enter the calibration state prior to performing accurate conversions. During calibration, the chip executes a two-step process.

Features of the CS5509-AS are:(1)either 5V or 3.3V digital interface; (2)on-chip self-calibration circuitry; (3)output update rates up to 200/second; (4)ultra low power: 1.7 mW; (5)pin-selectable unipolar/bipolar ranges.The CS5509 has on-chip self-calibration circuitry which can be initiated at any time or temperature to ensure minimum offset and full-scale errors.Low power, high resolution, and small package size make the CS5509 an ideal solution for loop-powered transmitters, panel meters, weigh scales, and battery powered instruments.The device first performs an offset calibration and then follows this with a gain calibration. The two calibration steps determine the zero reference point and the full scale reference point of the converter's transfer function.From these points it calibrates the zero point and a gain slope to be used to properly scale the output digital codes when doing conversions.

The absolute maximum ratings of the CS5509-AS can be summarized as:(1)DC supply voltage:-0.3 to VD-0.3V;(2)storage temperature range:-65 to +150;(3)ambient operating temperature:-40 to +85;(4)input current, any pin except supplies:±10mA;(5)output current:±25 mA;(6)power dissipation:500mW.The CS5509 is a low power, 16-bit, monolithic CMOS A/D converter designed specifically for measurement of dc signals. The CS5509 includes a delta-sigma charge-balance converter, a voltage reference, a calibration microcontroller with SRAM, a digital filter and a serial interface.The CS5509 is optimized to operate from a 32.768kHz crystal but can be driven by an external clock whose frequency is between 30kHz and 330kHz.When the digital filter is operated with a 32.768kHz clock, the filter has zeros precisely at 50 and 60 Hz line frequencies and multiples thereof.