Reference current and voltage source with temperature sensor

Overview

Reference current and voltage source (RS) is used to supply analog blocks. It is based on bandgap reference voltage source, forming temperature compensated voltage, and two voltage-to-current converters. First converter uses an external resistor and output current has weak temperature dependence. Second converter uses an internal resistor and output matches internal resistor temperature and process variations.
RS has an internal temperature sensor (TS). The main principle of work is digitizing output voltage of current-biased p-n junction using SAR ADC, based on R2R 10-bit DAC. Die temperature is calculated with the following expression: Temp = (907 - code)*0.38 – 40 (should be verified during evaluation). Digital controller is included in control logic. Here analog part of the block is shown.

Key Features

TSMC CMOS 65 nm
Output voltage 1.12 V
Temperature-compensated voltage in wide temperature range
Low current consumption
Temperature sensor
Small area
Portable to other technologies (upon request)

Applications

Supply voltage stabilization systems
Comparison and detection systems
System-on-chip for different purposes
Measurement and calibration systems
Technological research of microelectronic components
Navigation systems

Deliverables

Schematic or NetList
Abstract model (.lef and .lib files)
Layout view (optional)
Behavioral model (Verilog)
Extracted view (optional)
GDSII
DRC, LVS, antenna report
Test bench with saved configurations (optional)
Documentation

Technical Specifications

Foundry, Node

TSMC CMOS 65 nm

Maturity

silicon proven

Availability

Now

TSMC

Silicon Proven: 65nm G

Request Info