TSS400QFN-S1

uPower programmable high-precision sensor signal processor

• 12-Bit ADC With 4-Multiplexed Inputs
• Wide Supply Voltage Range 2.6 V to 5.5 V
• Low Power Consumption Typical at VDD = 3 V
–  0.1 µA in OFF Mode
–  4 µA in DONE Mode
–  80 µA in ACTIVE Mode Without A/D Conversions
–  300 µA in ACTIVE Mode With A/D Conversions
• Onboard 4-MUX 56-Segment LCD Driver
• Onboard Ratiometric Current Source Programmable From 0.15 mA × (SVDD/V) to 2.4 mA × (SVDD/V)
• Two Independent Crystal Controlled Timers (32.768 kHz)
• Internal MOS Oscillator Serves as System Clock
• Programmable Microcontroller
• Simple and Easy Programming With SMPL Macro Language description

The TSS400 Standard (TSS400-S1) sensor signal processor is an ultra-low power, intelligent, 12-bit A/D
converter (ADC) that has been preprogrammed with the Sensor Macro Programming Language (SMPL)
interpreter. This language allows fast, easy, and economical customization of the TSS400-S1 to a wide range
of sensor signal processing applications. The application specific programs that customize the operation of the
TSS400-S1 are stored in external EEPROMs along with any additional data required by the application. The
main components of the TSS400-S1 are a four-input multiplexed 12-bit ADC, a programmable constant current
source, an LCD driver capable of driving 56 segments using a 4-MUX drive scheme, two crystal controlled
independent timers, an on-board RAM, six output-only pins (R1 to R6), a 4-bit programmable I /O port (K1, K2,
K4, K8), and I2C serial EEPROM communications. Operation of the TSS400-S1 is very adaptive because it is
controlled by a SMPL language program. These programs can be stored in an external EEPROM (standalone
mode) or stored in a host computer (slave mode). The SMPL language is a powerful, easy to learn, and easy
to use macro language. Some of the SMPL language features are single-command EEPROM read and
EEPROM write operations, three levels of subroutines, a single-command A/D conversion instruction that
specifies the number of conversions and the type of conversion (either compensated or noncompensated) to
be made, and two reduced power consumption modes (DONE and OFF).

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