Product category: Analogue and Mixed Signal ICs
News Release from: Linear Technology Corp | Subject: LTC2442
Edited by the Electronicstalk Editorial Team on 06 February 2006
Delta-sigma ADC takes amp onboard
The LTC2442 is an ultra-high-precision multiplexed 24bit no-latency delta-sigma ADC with an integrated high performance amplifier.
Linear Technology has introduced the LTC2442, an ultra-high-precision, multiplexed 24bit no-latency delta-sigma ADC with an integrated high performance amplifier The LTC2442 achieves 1ppm linearity with the amplifier configured as a unity gain buffer, easing drive requirements for high-impedance sensors
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Optional external resistors may be connected to the amplifier to increase the gain for low level input signals.
This flexible convertor allows the amplifier supply rails to be connected to VCC and ground or biased beyond the rails for rail-to rail input signals.
The LTC2442's proprietary architecture rejects channel-to-channel crosstalk and is immune to lockup due to large input disturbances.
This combination of high precision and high input impedance makes the part suitable for the most demanding industrial and scientific instrumentation applications.
The LTC2442 combines high performance with ease of use to shorten development time.
The integrated amplifiers reduce overall circuit size, improve the DC linearity and provide additional design flexibility with optional external gain setting resistors.
The proprietary delta-sigma architecture ensures stable DC accuracy through continuous transparent offset and full-scale calibration.
Ten no latency speed/resolution combinations from 6.9Hz to 3.5kHz are digitally selectable with noise as low as 220nV RMS.
In addition, a one cycle latency mode can be selected for each speed/resolution combination enabling output rates up to 7kHz (8kHz with an external oscillator) with 17bit noise performance.
Any combination of up to four single-ended inputs or up to two differential inputs can be selected with a common mode input range from ground to VCC.
The first conversion following a new channel or speed selection is valid.
The LTC2442 is specified for the commercial and industrial temperature ranges and is available in the 36-pin SSOP package.
Pricing starts at $7.45 each for the LTC2442 in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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