AD570: 8-Bit Successive Approximation Analog-to-Digital Converter

The AD570 is an 8-bit successive approximation A/D converter consisting of a DAC, voltage reference, clock, comparator, successive approximation register and output buffers-all fabricated on a single chip. No external components are required to perform a full accuracy 8-bit conversion in 25 us.

The AD570 incorporates the most advanced integrated circuit design and processing technology available today. I2 L (integrated injection logic) processing in the fabrication of the SAR function along with laser trimming of the high stability SiCr thin-film resistor ladder network at the wafer stage (LWT) and a temperature compensated, subsurface Zener reference insures full 8-bit accuracy at low cost.

Operating on supplies of +5 V and -15 V, the AD570 accepts analog inputs of 0 V to +10 V unipolar of ±5 V bipolar, externally selectable. As the BLANK and CONVERT input is driven low, the three-state outputs go into the high impedance state and a conversion commences. Upon completion of the conversion, the DATA READY line goes low and the data appears at the output. Pulling the BLANK and CONVERT input high three states the outputs and readies the device for the next conversion. The AD570 executes a true 8-bit conversion with no missing codes in approximately 25 us.

The AD570 is available in two version; the AD570J is specified for the 0°C to +70°C temperature range, the AD570S for -55°C to +125°C. Both guarantee full 8-bit accuracy and no missing codes over their respective temperature ranges.

AD570 特点

Complete A/D Converter with Reference and Clock
Fast Successive Approximation Conversion: 25 us
Digital Multiplexing: Three-State Outputs
18-Pin Ceramic DIP
No Missing Codes Over Temperature
0°C to +70°C: AD570J
–55°C to +125°C: AD570S
Low Cost Monolithic Construction

AD570 功能框图

AD570 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
5962-8680201VA	量产	18 ld Side-Brazed CerDIP	18	军用
AD570JD	量产	18 ld Side-Brazed CerDIP	18	商业
AD570SCHIPS	量产	CHIPS OR DIE	-	军用
AD570SD	量产	18 ld Side-Brazed CerDIP	18	军用
AD570SD/883B	量产	18 ld Side-Brazed CerDIP	18	军用