Converter offers 15 Hz output rate with 50/60 Hz rejection.
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Press Release Summary:
Model LTC2435 20-bit analog-to-digital converter maintains 2 ppm integral nonlinearity performance and common-mode-rejection-ratio of 140 dB. On-chip oscillator eliminates need for external frequency setting components. No latency architecture allows single cycle settling for multiplexed applications. Converter comes in 16-pin SSOP package and operates from 2.7-5.5 V supply range. It consumes just 200 µA during conversion and 4 µA during shutdown.
Original Press Release:
20-Bit ADC Offers 15Hz Output Rate with 50Hz/60Hz Rejection & 2ppm INL Performance
MILPITAS, CA - July 10, 2003 - Linear Technology introduces the LTC2435, an accurate and easy to use 20-bit Analog-to-Digital Converter (ADC) that offers 15Hz output rate with 50Hz/60Hz rejection, while maintaining an ultralow 2ppm integral nonlinearity (INL) performance.
The LTC2435 performs transparent full-scale calibration on every conversion, which provides extreme stability of full-scale readings with respect to time, supply voltage change and temperature range. Its high accuracy differential nonlinearity (DNL) guarantees true 20-bit output with no missing codes and its common-mode-rejection-ratio (CMRR) is 140dB. This device allows direct digitization of inputs in applications such as weigh scales, temperature measurements, gas analyzers and strain gauge transducers.
The LTC2435 has a proprietary no latency architecture that allows single cycle settling for multiplexed applications. Single cycle settling and transparent full-scale calibration simplify system design by reducing software overhead. The LTC2435 also includes a highly accurate on-chip oscillator, which eliminates the need for external frequency setting components such as crystals or oscillators. This device eliminates configuration and calibration registers, external components and special filtering that other high resolution ADCs require.
The LTC2435 is available in the 16-pin SSOP package over the commercial and industrial temperature ranges. It operates from a 2.7V to 5.5V supply range. This converter can accept any differential reference voltage from 0.1V to V CC , providing flexibility in ratiometric and remote sensing applications, and has a differential input range of -0.5V REF to 0.5V REF. It consumes just 200uA during conversion and 4uA during shutdown, which is important in portable applications. The LTC2435 also has a 24-bit pin-compatible upgrade, the LTC2415.
Pricing begins at $3.55 each in 1,000-piece quantities.
Summary of Features: LTC2435
LTC2435 15Hz Output Rate with 50Hz or 60Hz Rejection
LTC2435-1 13.75Hz Output Rate with 50Hz and 60Hz Rejection
Differential Inputs
16-Pin SSOP Package
On-Chip Oscillator
2ppm INL (2.5V Reference)
20-Bits No Missing Codes
4uV (RMS) Noise
Automatic, Transparent Full-Scale Calibration
Flexible Reference Input: 0.1V to V CC
Low Supply Current: 200uA during Conversion and 4uA during Shutdown
Wide Supply Range: 2.7V to 5.5V
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequencydevices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site: www.linear.com
