Product category: Analogue and Mixed Signal ICs
News Release from: Maxim Integrated Products | Subject: MAX1153/MAX1253 and MAX1154/MAX1254
Edited by the Electronicstalk Editorial Team on 14 May 2003
Data acquisition ICs feature temperature
sensing
A new range of eight-channel 10 and 12bit ADCs with internal temperature sensors and power-supply voltage monitoring interface directly to SPI, QSPI and Microwire devices without external logic.
A new range of eight-channel 10 and 12bit ADCs with internal temperature sensors and power-supply voltage monitoring interface directly to SPI, QSPI and Microwire devices without external logic These devices offer 94Ksample/s, +/-1LSB integral nonlinearity and +/-1LSB dynamic nonlinerity with no missing codes, all in small 16-pin TSSOP packages
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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When these ADCs are in temperature-sensing mode, internal bias currents pass through external diode-connected transistors for +/-1C-accurate temperature measurements.
They can also be configured for single-ended or differential remote temperature sensors with no additional circuitry.
The full-scale analogue input voltage range is determined by an internal reference at 2.048V for the 3V parts and 4.096V for the 5V parts.
An external reference is used in the 1V to power-supply voltage range.
Software-selectable conversion rates help optimise power consumption.
These data-acquisition systems have an internal state machine that cycles through temperature and voltage measurements, generating an alarm condition and interrupt when measurements fall outside the user-programmed threshold.
Programmable on-chip digital averaging and consecutive fault counters reduce the occurrence of false alarms in noisy environments.
Autonomous input monitoring and alarming make the MAX1153/MAX1253 and MAX1154/MAX1254 ideal for system monitoring applications while minimising host processor overhead.
The MAX1153/MAX1253 operate with a 2.7 to 3.6V single supply, whereas the MAX1154/MAX1254 operate with a 4.75 to 5.25V single supply.
These devices consume only 2.2mA when monitoring eight input voltages, on-chip temperature, and power-supply voltage with internal reference at 2Ksample/s per channel.
They consume only 2uA in shutdown mode.
The MAX1153/MAX1253 and MAX1154/MAX1254 are available in a 16-pin TSSOP packages in the extended (-40 to +85C) temperature range.
Prices start at $3.50 (1000-up, FOB USA).
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