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Current Input Analogue Front End with Digital Control and SPI Interface, TSMC 180nm

The Current Input Analogue Front End chip provides a silicon IP module and/or ASIC solution for the programmable analogue front-end (AFE) function, optimized for current-input, low power & high resolution applications. The Current Input Analogue Front End provides a complete signal path between sensor system and suitable analogue-to-digital converter, generating a fully differential output voltage proportional to the input current.

The Current Input Analogue Front End is ideally suited for a broad range of devices with the sensor system where the generic information about the phenomenon to be measured - light or other physical or chemical or electrochemical appearance - passes the first electrical conversion to the current. The IP implementation enables easy further System on Chip (SoC) integration of follow up functions.

特色

Detection and measurement of low input current from hundreds of pA to 1 mA |absolute value|
Detection of small input current difference on the level of tens of pA
Overall gain up to 1296 (programmable gains 1, 3, 6)
High linearity: < 0.5 LSB per gain stage for 12-bit resolution
Low noise PGA (switched-capacitor architecture)
Analogue output range: 1.3 Vp-p
Single supply voltage: 1.6 V to 1.8 V
Internal band-gap voltage reference: 1.0 V
Internal voltage and current references
User control over standard SPI interface
Programmable clocking for PGA and S&H
Power consumption: ~ 4.5 mW
Operating temperature range: -40°C to 125°C
Compact IP area: ~ 4 mm²

优势

Direct interface to the sensor system
Detection and measurement of low input current in the range of hundred of picoA, well suited for biosensors, photosensors, LED and PIN diodes
Special circuit for current management and biasing of PiN diode in auto-zero mode
Highly linear current-to-voltage conversion achieved by using Transimpendance Amplifier (TIA) architecture
Effective offset cancellation throughout the signal path
Single-ended current input with fully differential (FD) voltage output for further signal processing

可交付内容

GDSII layout database
Assembly guidelines and integration support
Datasheet
Behavioural VHDL model for SoC simulations
Layout footprint
Application notes
VHDL code for synthesis

On demand:
LVS/SPICE netlist
MATLAB model for effective system design

Block Diagram of the Current Input Analogue Front End with Digital Control and SPI Interface, TSMC 180nm

Current Input Analogue Front End with Digital Control and SPI Interface, TSMC 180nm Block Diagam

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