Datasheet > ZMD31020AF-R

ZMD31020AF-R

更新时间： 2025-09-17 09:34:11

品牌	Logo	应用领域
艾迪悌 - IDT		光电二极管
页数	文件大小	规格书
21页	453K
描述
Analog Circuit, 1 Func, CMOS, PDSO14

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ZMD31020AF-R 数据手册

ZMD31020

Differential Sensor Signal Conditioner

General Description

ZMD31020 is a signal conditioner for sensors (sensor elements; transducers) with differential output signal, e.g.

for Wheatstone-bridge-type sensors. The device provides digital correction and compensation of sensor offset,

gain, temperature sensitivity and non-linearity through an on-chip RISC-Microcontroller running a correction

algorithm.

A bidirectional digital serial interface allows for a simple PC-controlled calibration procedure, encompassing

reading of non-corrected sensor signal and temperature values and writing and programming of a resulting

calculated set of calibration coefficients into an on-chip parameter EEPROM. Thus a specific sensor and a

ZMD31020 conditioner device are mated digitally: fast, precise and without cost overhead for trimming

components and equipment.

ZMD31020 has been designed in 0.8µm EEPROM-CMOS for a typical supply voltage of 5V and an operating

temperature range –40°C ... +125°C, covering commercial, industrial and automobile applications. The device is

available both unpackaged as tested die or as finished product in 5.3mm width SSOP14.

A demokit including samples, documentation and PC-compatible hardware and software for emulation and

calibration is available.

Features

Optimized for ratiometric differential sensors

Cost-effective: a single 12-bit input ADC, 16-bit RISC-µC, 11-bit output DAC; no adjustment DACs needed

Minimum number of external components required: supply capacitor; sensor; analog output load capacitor

Temperature sensing optionally through off-chip or on-chip diode

Analog input multiplexer for differential sensor signal and temperature

Chopper-stabilized PGA, programmable to 3 differential gains (15.66, 24 and 42)

ADC resolves sensor signal with 12 bits, temperature with 10 bits

ADC’s output programmable to 4 zero-input bias values: 1/16, 1/8, ¼, ½ of conversion range

Analog input stage measures sensor signal ratiometrically, however temperature BG-related

Correction Processor: 16-bit ALU & (16 x 16 bit ) RAM; (1k x 16)-bit instruction ROM; (12 x 16)-bit

parameter EEPROM

Cancellation of chip-related offset in sensor and temperature signal through short-circuit input switch and

subtraction routine

Correction formula based on 7 calibration coefficients

Parameter EEPROM stores: configuration word, calibration coefficients, upper and lower output signal

limits, customer specific identifiers

Corrected sensor signal available both as 12-bit digital word at the I2C interface and as ratiometric analog

voltage from an 11-bit output DAC

Cycle time: 10ms. Response time: 11ms

Calibration of a sensor element / ZMD31020 combination to a desired output characteristic

through measurement of 7 uncorrected sensor and temperature value pairs

These values are read over the I2C interface and processed to calculate the 7 calibration coefficients.

Mating is completed by programming the calibration coefficients into the EEPROM over the I2C interface

PC-compatible hardware and software supporting the calibration procedure is available and included in the

demokit ZMD31020DK

Accuracy: ± 0.25% FSO typically

Datasheet, Rev. 1.4, March 27th, 2002

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与ZMD31020AF-R相关器件

型号	品牌	获取价格	描述	数据表
ZMD31020AF-S	IDT	获取价格	Analog Circuit, 1 Func, CMOS, PDSO14
ZMD31020BCB	ZMD	获取价格	Sensor Signal Conditioner
ZMD31020BCC	ZMD	获取价格	Sensor Signal Conditioner
ZMD31020BCD	ZMD	获取价格	Sensor Signal Conditioner
ZMD31020BCF-R	ZMD	获取价格	Sensor Signal Conditioner
ZMD31020BCF-T	ZMD	获取价格	Sensor Signal Conditioner
ZMD31020BCG1-R	IDT	获取价格	Sensor/Transducer,
ZMD31020BCG1-T	IDT	获取价格	Sensor/Transducer,
ZMD31020BIB	ZMD	获取价格	Sensor Signal Conditioner
ZMD31020BIC	ZMD	获取价格	Sensor Signal Conditioner

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