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ZMD21013 Datasheet(PDF) 1 Page - Zentrum Mikroelektronik Dresden AG |
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ZMD21013 Datasheet(HTML) 1 Page - Zentrum Mikroelektronik Dresden AG |
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1 / 2 page  The Analog Mixed Signal Company ZMD21013 MUSic Low-Power Multi-Channel Sensor Interface Circuits Benefits • Extremely long battery life due to <100nA idle current and 25 to 30µW average power consumption in operation • Space optimized design with three bridge inputs, high-gain amplification, and parameter handling – all in one IC • High input amplification allows use of wide range of highly sensitive resistive sensor elements Features • Programmable analog-to-digital conversion of amplified resistive sensor input signals • Low-power (average 25µW), high-sensitivity, multi-channel sensor interface IC • 3-channel sensor-bridge input multiplexer • Completely ratiometric systems • Inherent temperature measurement mode • Low-noise SC amplifier with offset compensation and adaptive operational amplifier biasing • Industrial and consumer temperature range (-25°C to +85°C) • Internal auto-zero mode • Voltage-driven (switched or static) bridge mode • On-chip EEPROM and RC oscillator Interfaces • Analog signal in: 3 channels, optimized for sensor bridge inputs • Digital signal out: flexible, full duplex, high-throughput 3-wire SPI • Optional external clock 28kHz to 36kHz Physical Characteristics • Power supply range: ……… 2.2V to 5.5V • ADC-resolution: ………….. (10, 12, 14, 16)bit • Input sensitivity: …………… ( 0.9, 1.8, 3.7, …)µV/V • Standby (idle) current: ……. <100nA @ 85°C • Power consumption: ……… 4.5µW to 22.5µW @ 3V Brief Description The ZMD21013 is optimized for low-voltage and low-power multiple resistive bridge sensor applications, such as battery- operated consumer or industrial products. The ZMD21013 provides programmable amplification and analog-to-digital conversion (ADC) of the sensor signal input with an optional temperature measurement output. This standard product is applicable to almost any one, two, or three dimensional detec- tion devices. The IC’s analog sampling architecture enables a significant re- duction of average power consumption via switched measure- ments. The applied sensor will only be switched on during the sampling time, which leads to typical average power consump- tion of 25 to 30µW. This makes the ZMD21013 the interface device of choice for low-power sensor-based applications. By default, the sensor bridges operate in a voltage driven mode. ADC resolution, sample rate, input range, sensitivity, and measurement mode are programmable. In addition, the IC supports an auto-zero mode, which allows monitoring tem- perature, long-term stability drifts and offsets for compensa- tion and correction purposes. The ZMD21013 includes an on-chip clock generator and an 16x8 bit EEPROM to store non-volatile configuration data. An SPI-standard digital interface allows flexible adaptability to the respective external digital system components (e.g. microcon- trollers). Applications and Examples • Acceleration measurement • Compass functions • Density measurement (differential pressure analysis) • Altimeter and barometer (watches, mobile devices) • Flow and velocity measurement • Pressure measurement (fluids, gases) • Temperature measurement |
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