This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: General Description The MAX1272/MAX1273 multirange 12-bit data-acquisi- tion systems (DAS) operate with a single 5V supply. The software-programmable analog input accepts a variety of voltage ranges: ±10V, ±5V, 0 to 10V, 0 to 5V for the MAX1272; ±V REF , ±V REF / 2, 0 to V REF , 0 to V REF / 2 for the MAX1273. The software-selectable extended analog input range increases the effective dynamic range to 14 bits and provides the flexibility to interface 4–20mA pow- ered sensors directly to a single 5V system. In addition, the MAX1272 provides fault protection to ±12V. Other features include a 5MHz track/hold (T/H) bandwidth, 87ksps throughput rate, and internal (4.096V) or external (2.40V to 4.18V) reference. The MAX1272/MAX1273 serial interfaces connect directly to SPI™/QSPI™/MICROWIRE™-compatible devices without any external logic. Four software-programmable power-down modes (delayed standby, immediate standby, delayed full power- down, and immediate full power-down) provide low-cur- rent shutdown between conversions. In standby mode, the internal reference buffer remains active, thus eliminating startup delay. The MAX1272/MAX1273 are available in an 8-pin PDIP package. Both devices are available in the commercial (0°C to +70°C) or extended (-40°C to +85°C) tempera- ture range. Applications Industrial Control Systems Data-Acquisition Systems Robotics Automatic Testing Battery-Powered Instruments Medical Instruments Features ♦ Four Software-Selectable Input Ranges MAX1272: 0 to 10V, 0 to 5V, ±10V, ±5V MAX1273: 0 to V REF , 0 to V REF / 2, ±V REF , ±V REF / 2 ♦ 12-Bit Resolution, No Missing Codes ♦ 5V Single-Supply Operation ♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire Interface ♦ 87ksps Sampling Rate ♦ ±12V Fault-Protected Analog Input (MAX1272) ♦ Internal (4.096V) or External (2.4V to 4.18V) Reference ♦ Low Power 1.5mA at 87ksps 0.4mA at 10ksps 0.2mA at 1ksps ♦ Four Power-Down Modes ♦ 8-Pin PDIP Package MAX1272/MAX1273 Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range ________________________________________________________________ Maxim Integrated Products 1 REF AIN GND 1 2 8 7 DOUT CS DIN V DD SCLK PDIP TOP VIEW 3 4 6 5 MAX1272 MAX1273 Pin Configuration Ordering Information 19-2921; Rev 2; 5/04 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN- PACKAGE INL (LSB) MAX1272 CPA ° C to +70 ° C 8 Plastic DIP ± 1 MAX1272EPA-40 ° C to +85 ° C 8 Plastic DIP ± 1 MAX1273 CPA ° C to +70 ° C 8 Plastic DIP ± 1 MAX1273EPA-40 ° C to +85 ° C 8 Plastic DIP ± 1 SPI and QSPI are trademarks of Motorola, Inc....
View Full Document
This note was uploaded on 06/17/2010 for the course ECE 500 taught by Professor Ma during the Spring '10 term at Abraham Baldwin Agricultural College.
- Spring '10