Complete, 12-Bit A/D Converters with Microprocessor Interface
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Overview
Description
The HI-X74(A) is a complete 12-bit, Analog-to-Digital Converter, including a +10V reference clock, three-state outputs and a digital interface for microprocessor control. Successive approximation conversion is performed by two monolithic dice housed in a 28 lead package. The bipolar analog die features the Intersil Dielectric Isolation process, which provides enhanced AC performance and freedom from latch-up. Custom design of each IC (bipolar analog and CMOS digital) has yielded improved performance over existing versions of this converter. The voltage comparator features high PSRR plus a High-Speed current-mode latch, and provides precise decisions down to 0. 1 LSB of input overdrive. More than 2X reduction in noise has been achieved by using current instead of voltage for transmission of all signals between the analog and digital ICs. Also, the clock oscillator is current controlled for excellent stability over temperature. The HI-X74(A) offers standard unipolar and bipolar input ranges, laser trimmed for specified linearity, gain and offset accuracy. The low noise buried zener reference circuit is trimmed for minimum temperature coefficient. Power requirements are +5V and ±12V to ±15V, with typical dissipation of 385mW (HI-574A/674A) at 12V.
Features
- Complete 12-Bit A/D Converter with Reference and Clock
- Full 8-Bit, 12-Bit or 16-Bit Microprocessor Bus Interface
- Bus Access Time 150ns
- No Missing Codes Over Temperature
- Minimal Setup Time for Control Signals
- Fast Conversion Times
- HI-574A (Max) 25µs
- HI-674A (Max) 15µs
- Low Noise, via Current-Mode Signal Transmission Between Chips
- Byte Enable/Short Cycle (AO Input)
- Guaranteed Break-Before-Make Action, Eliminating Bus Contention During Read Operation. Latched by Start Convert Input (To Set the Conversion Length)
- Supply Voltage ±12V to ±15V
- Pb-Free Available (RoHS Compliant)
Comparison
Applications
Applications
- Military and Industrial Data Acquisition Systems
- Electronic Test and Scientific Instrumentation
- Process Control Systems
Documentation
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|---|---|---|
| Type | Title | Date |
| Datasheet | PDF 622 KB | |
| Brochure | PDF 5.20 MB 日本語 | |
| Brochure | PDF 467 KB | |
| Brochure | PDF 4.85 MB | |
| End Of Life Notice | PDF 1.17 MB | |
| End Of Life Notice | PDF 244 KB | |
| Product Change Notice | PDF 260 KB | |
| Product Advisory | PDF 282 KB | |
| Product Change Notice | PDF 134 KB | |
| Application Note | PDF 843 KB | |
| Application Note | PDF 338 KB | |
| Application Note | PDF 503 KB | |
| Application Note | PDF 1.08 MB | |
| Application Note | PDF 508 KB | |
| Application Note | PDF 287 KB | |
15 items
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Design & Development
Software & Tools
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| SBDIP | Tube | 78 | Get Samples, | |
| SBDIP | Tube | 52 | Get Samples, |
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Support
Renesas Samples
Select an orderable part number:
| Orderable Part ID | Sample |
|---|---|
| HI1-574ASD-2 | Availability |
| HI1-574ATD-2 | Availability |