“ZMDI’s goal is to enable our customers to deliver systems that address the demand for energy efficient solutions,” says Frank Schulze, ZMDI. “The ZSSC1856 Intelligent Battery Sensor effectively offers automotive, industrial and medical customers a smaller, high-resolution and less power consuming alternative to present battery power management offerings.”
Originally designed for automotive applications such as start/stop systems, the ZSSC1856 lends itself perfectly to industrial and medical systems that require precise battery state-of-health (SOH), state-of-charge (SOC) or state-of-function (SOF) monitoring, such as emergency lighting, uninterruptable power supplies, hospital equipment and alarm systems.
The ZSSC1856 is a dual-channel ADC with an embedded microcontroller. One of the two input channels measures the battery current IBAT via the voltage drop at the external shunt resistor. The second channel measures the battery voltage VBAT and the temperature. An integrated flash memory is provided for customer-specific software. The device communication interface supports LIN 1.3, 2.0 and 2.1 specifications, as well as SPI and I²C. During Sleep Mode (e.g., engine off), the system makes periodic measurements to monitor the discharge of the battery. Measurement cycles are software-controlled and include various wake-up conditions. The ZSSC1856 is optimized for ultra-low power consumption and draws only 100μA or less in this mode. The ZSSC1856 is AEC-Q100 qualified and specified for temperatures from -40°C to +125°C.
This product is priced at 4,06 EUR/pc. (5.48 USD) for 1k pieces. Evaluation kits, application notes and samples are available.
■Smallest footprint in the industry: PQFN32 5mm x 5mm package
■Lowest power consumption without sacrificing performance
■18-bit resolution for higher accuracy
The second new IC is an additional member of ZMDI's ZSSC signal sensor conditioner product family, the ZSSC3154.
With the ZSSC3154, two different input signals, such as a pressure signal from a resistive full bridge and temperature from an external temperature sensor (diode or positive temperature coefficient (PTC) resistor), are read out using one IC. The ZSSC3154 also measures the temperature of the full bridge sensor either externally or directly on the chip to compensate for the sensor’s offset, gain and temperature coefficient up to the second order and non-linearity failures up to the third order. The signal from the ambient temperature sensor is also digitally compensated for offset, gain and non-linearity up to the second order. These digital corrections are performed by a 16-bit RISC microcontroller using coefficients and settings stored in an on-board EEPROM memory. Different programmable configurations of the two analog outputs allow reading both measurement results simultaneously or generating two complementary (normal and antivalent) signals from the full-bridge sensor for controlling the correct sensor-to-module communication over time.
“The various configurable output options of the two analog output channels allow our customers to setup applications with redundant output signals. An example of application areas for the ZSSC3154 may include automotive ABS/ESC applications” stated Frank Schulze, Business Line Manager for Sensing and Automotive at ZMDI.
The ZSSC3154 allows a digital one-pass end-of-line calibration with integrated broken-chip detection, enabling fully automatic and highly efficient mass production for non-calibrated sensing elements. The IC is available as die or in a QFN32 5x5 mm plastic package compliant with the JEDEC standard. The ZSSC3154 is qualified according to AEC-Q100 automotive standards for an operational temperature range between -40°C and +125°C.
The unit price is EUR 4,60 / USD 6.22 for packaged parts in tubes with a minimum order of 1000 ICs or EUR 1,56 / USD 2.11 for die on frame with a minimum order of 10,000 die. The IC is available for volume production.
Benefits and Features of the ZSSC3154:
■Various configurable output options
■Safety output behavior via two antivalent analog outputs
■Simultaneous measurement of sensor signal and temperature signal for compensation and ambient temperature
■Efficient use of non-calibrated elements for bridge and ambient temperature sensors without external trimming components
■Single-pass end-of-line calibration algorithm and broken-chip detection minimize production costs
■High EMC/ESD robustness and AEC-Q100 qualification