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The Analog Mixed Signal Company
ZMD31012
RBic2LiteTM
Two Low-cost Sensor Signal Conditioners ZMD31010 Chips in One Package
P R E L I M I N A RY Features two ZMD31010
* Separate digital compensation of sensor offset, sensitivity, temperature coefficient and non-linearity * Accommodates differential sensor signal spans from 1.2mV/V to 60mV/V for two inputs * Dual ZACwireTM one-wire interface * Internal temperature compensation reference via bandgap PTAT* * Optional sequential output of both temperature and bridge readings two ZACwireTM digital output * Output options: ratiometric analog voltage, absolute analog voltage, digital one-wire-interface * Supply voltage 2.7V to 5.5V, with external JFET 5.5V to 30V * Current consumption 2mA * Operation temperature -50C to +150C * Fast response time: 1ms * High voltage protection up to 30V with external JFET * Chopper stabilized true differential ADC * Buffered and chopper stabilize output DAC
*Proportional to absolute temperature
Benefits
The ZMD31012 combines the benefits of two single ZMD31010. * No external trimming components required * PC-controlled configuration and calibration via one-wire interface - simple, low cost * High accuracy (0.1% FSO @ -25C to 85C; 0.25% FSO @ -40C to 125C) * Single pass calibration - quick and precise Due to the two independent channels the ZMD31012 provides a perfect fit for the following selected samples: * Applications that require redundancy * Measurement of differential pressure * Flow Sensors
Brief Description
The ZMD31012 consists of two ZMD31010 dies in a standard SSOP14 packages. ZMD31012 is a CMOS integrated circuit, which enables easy and precise calibration of resistive bridge sensors via EEPROM. When mated to a resistive bridge sensor, it will digitally correct offset and gain with the option to correct offset and gain coefficients and linearity over temperature. A second compensation can be enabled for temperature coefficients of gain or offset or bridge linearity. ZMD31012 communicates via ZMD's ZACwireTM serial interface to the host computer and is easily mass calibrated in a Windows(R) environment. Once calibrated, the output SIGTM pin can provide selectable 0V to 1V, rail-to-rail ratiometric analog output, or digital serial output of bridge data with optional temperature data.
* ZMD31010 Development Kit can be used * Support for industrial mass calibration will be available * Quick circuit customization possible for large production volumes
Application Circuit
Application Examples
Appliances Industrial Automotive Consumer/Medical
Filter Check Refrigerant * Pressure Monitoring
* *
* *
Process Control Dataloggers
Airflow Differential Pressure * Process Control * Redundancy
* *
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Blood Pressure Meters PDAs
Ordering Code
Example:
ZMD Product Sales Name
ZMD31012 BIF-T
Delivery Form** T = delivery in tube R = delivery in tape on reel S = special (e.g. sample box)
Design Revision A = first design revision B = second design revision etc.
Die/Package Options B C D F G1 = = = = = tested dice on unsawn wafer tested dice on frame tested dice in waffle pack finished parts in plastic package finished parts in "green" plastic package (lead-free terminals - pure Sn)
Target Application Area/ Usual Operating Temperature Range* I = Industrial (-40C to +125C) E = Extended automotive (-50C to +150C)
* only for serial parts; engineering samples don't have this character ** only for finished parts in plastic package Engineering samples can be marked with the additional characters "ES". Not all possible product versions are available. Please ask ZMD sales if and when a certain product version is available. For further information: ZMD AG Grenzstrasse 28 01109 Dresden Germany Tel +49.351.8822.366 Fax +49.351.8822.337 sales@zmd.de ZMD America, Inc. 201 Old Country Road, Suite 204 Melville, NY 11747 USA Tel +1.631.549.2666 Fax +1.631.549.2882 sales@zmda.com ZMD Far East 1F, No. 14, Lane 268, Sec. 1 Guangfu Rd. HsinChu City 300 Taiwan Tel +886.3.563.1388 Fax +886.3.563.6385 sales@zmd.de
(c) ZMD AG 2006 * Rev. 0.1 * Preliminary
www.zmd.biz
This information applies to a product under development. Its characteristics and specifications are subject to change without notice. ZMD assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, ZMD shall not be liable to any customer, licencee or any other third party for any damages in connection with or arising out of the furnishing, performance or use of this technical data. No obligation or liability to any customer, licencee or any other third party shall result from ZMD`s rendering of technical or other services.

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