Description

The ZSSC3138 is a member of the ZSSC313x product family of CMOS integrated circuits designed for automotive/industrial sensor applications. All family members are well suited for highly-accurate amplification and sensor specific correction of resistive bridge sensor signals. An internal 16 bit RISC microcontroller running a correction algorithm compensates sensor offset, sensitivity, temperature drift, and non-linearity of the connected sensor element. The required calibration coefficients are stored by the One-Pass calibration procedure in an on-chip EEPROM.

The ZSSC3138 offers a maximum analog gain of 420 and two offset compensation features. These fit perfectly to the requirements of ceramic thick-film based sensor elements as well as strain gauges. The high amplification in combination with the offset compensation offers the capability to set up ceramic thick-film sensor applications without laser trimming, which leads to better long-term stability.

Support includes evaluation kits, application notes and mass calibration system.

Features

• Adjustable to nearly all resistive bridge sensor types: analog gain of 420; maximum overall gain of 1680
• Sample rate: 7.8 kHz maximum
• ADC resolution 15/16 bit
• Safety functionality sensor connection
• Internal temperature compensation
• Output options: Ratiometric analog voltage output (5-95% maximum, 12.4 bit resolution) or ZACwire tm (digital One-Wire Interface - "OWI")
• Sensor biasing by voltage
• High voltage protection up to 33V
• Supply current Max 5.5 mA
• Reverse polarity and short-circuit protection
• Wide operating temperature range: -40 to +150°C
• Traceability by user-defined EEPROM entries
• Supply voltage 4.5 to 5.5 V
• RoHS-compliance JEDEC-SSOP14 package or delivery as die

Benefits

• Family approach offers the best fitting IC-selection to build cost-optimized applications
• No external trimming components required
• Low number of external components needed
• High accuracy (0.25% FSO @ -25 to +85°C; 0.5% FSO @-40 to +125°C)
• Optimized for automotive/industrial environments due to robust protection circuitries, excellent electromagnetic compatibility, and AEC-Q100 qualification.

Typical Uses

Optimized for ceramic sensor and strain gauge applications.