Title :
A Multi-Voltage Reference Source
Author :
Ramos, Filipe G R ; Caldeira, Laércio ; Pimenta, Tales Cleber
Author_Institution :
FreeScale, Austin
Abstract :
A 3 bits programmable, low drift, high PSRR and high precision voltage reference, optimized to power management (PM) applications, is presented. The topology is based on a high performance bandgap voltage reference applied to a non-inverting amplifier stage, which generates an internal voltage reference of 2.4V, isolated by a buffer and derived by resistor dividers, generating eight selectable output voltages from 0 to 2.1V, chosen by an analog multiplexer. It has been successfully verified in a standard 0.35m CMOS process. The experimental results have confirmed that, for power supply of 3.0V to 3.3V, and -20oC to 80oC temperature range, the programmable output voltage VREF has a worst case precision of plusmn3%.
Keywords :
CMOS analogue integrated circuits; amplifiers; dividing circuits; network topology; reference circuits; CMOS process; analog multiplexer; bandgap voltage reference; internal voltage reference; multi-voltage reference source; non-inverting amplifier stage; power management; resistor dividers; size 0.35 mum; temperature -20 C to 80 C; voltage 0 V to 2.1 V; voltage 2.4 V; voltage 3.0 V to 3.3 V; Application specific integrated circuits; Circuit topology; Energy management; Microprocessors; Photonic band gap; Power supplies; Resistors; Temperature dependence; Temperature distribution; Voltage;
Conference_Titel :
Electronics, Robotics and Automotive Mechanics Conference, 2007. CERMA 2007
Conference_Location :
Morelos
Print_ISBN :
978-0-7695-2974-5
DOI :
10.1109/CERMA.2007.4367762
