Product category:
Analogue and Mixed Signal ICs
News Release from: Linear Technology Corp | Subject: LTC2493
Edited by the Electronicstalk Editorial
Team on 21 September 2007
Convertor stays stable with multiple
inputs
Four-channel delta-sigma ADC incorporates a high-accuracy internal temperature sensor.
New from Linear Technology, the LTC2493 is a four-channel delta-sigma ADC with an internal temperature sensor that offers 0.33C resolution and 2C absolute accuracy The accurate, integrated temperature sensor enables temperature compensation of external sensors
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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The LTC2493 communicates via a two-wire I2C-compatible serial interface and measures four single-ended or two differential analogue inputs, consuming a maximum of 300uA.
The LTC2493's novel Easy Drive architecture results in zero average differential input current, allowing measurements of high impedance input sources without the use of an internal buffer.
The LTC2493 directly digitises rail-to-rail input signals while maintaining excellent DC accuracy (2ppm INL), making it ideal for measuring multiple sensor signals such as temperature, pressure or current monitoring.
The LTC2493 maintains 600nV RMS noise across the full input voltage range, enabling measurement of microvolt level changes or signals as large as +/-2.5V.
The ADC converts the output of the temperature sensor or the input multiplexer, which can be configured for four single-ended channels, two differential channels, or two single-ended and one differential channel.
The LTC2493 performs conversions at rates of 15 or 7.5Hz using the internal oscillator and can be configured to reject line frequencies of 50, 60 or simultaneous 50/60Hz.
For lower resolution applications, Linear Technology is also introducing the LTC2489 and LTC2487, a pair of pin-compatible 16bit ADCs.
The LTC2487 includes programmable gain, an internal temperature sensor and selectable output frequency rejection.
The LTC2493, LTC2489 and LTC2487 are all available in 4 x 3mm DFN-14 packages, offering a pin-and software-compatible family for performance/cost optimisation.
These Easy Drive delta-sigma ADCs are all available in commercial and industrial temperature ranges.
Pricing begins at US $2.95 each for the LTC2493, $2.35 each for the LTC2487, and $2.15 each for the LTC2489, in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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