No Latency ADC suits multiplexed applications.
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Press Release Summary:
Housed in 28-pin SSOP package, LTC2439-1 consists of 8-channel differential input, 16-bit analog-to-digital converter (ADC). No Latency Delta-Sigma(TM) architecture allows single-cycle settling time, and digital filter always settles in one conversion cycle, even after change in multiplexer input channels. Equipped with on-chip oscillator, product features transparent auto calibration and operates from voltages of 2.7-5.5 V.
Original Press Release:
18/16-Channel 16-Bit No Latency Delta-Sigma ADCs for Low Cost Multiplexed Applications
MILPITAS, CA - May 18, 2004 - Linear Technology Corporation introduces the LTC2439-1, an 8-channel, differential input, low cost 16-bit analog-to-digital converter with a proprietary No Latency Delta-Sigma(TM) architecture that allows single-cycle settling time. The digital filter always settles in one conversion cycle even after a change in multiplexer input channels. Transparent auto calibration ensures stable output codes independent of time, temperature, supply and channel selection. The LTC2439-1 is ideal for products such as temperature or pressure sensors, process control equipment, or other applications that demand precise measurement of several inputs.
The LTC2439-1 combines high accuracy with all around ease of use. A wide common mode input range greatly simplifies analog front-end circuitry. An accurate internal oscillator eliminates external crystals or clocks simplifying design and saving board space. The LTC2439-1 simultaneously rejects 50Hz and 60Hz line frequencies, allowing direct connection to most sensors. The reference voltage can range from 0.1V to Vcc, maintaining 16-bit performance and providing flexibility in ratiometric and remote sensing applications. All of these benefits reduce design time and get product to market faster.
The LTC2439-1 operates from a wide 2.7V to 5.5V supply range. It consumes just 200uA of supply current during conversion and 2uA during shutdown. Available in the 28-pin SSOP package in both commercial and industrial temperature ranges, the LTC2439-1 is pin-compatible with the 24-bit LTC2418.
Pricing for the LTC2439-1 begins at $3.75 each in 1,000-piece quantities.
Summary of Features: LTC2439-1
16-Bit Resolution
8-Channel Differential and 16-Channel Single Ended
Single Conversion Settling Time: Simplifies Multiplexing
Excellent Absolute Accuracy: Total Unadjusted Error 0.2LSB
On-Chip Oscillator: No External Crystals or Oscillators Necessary
High Accuracy DNL: 16-Bit Resolution with No Missing Codes
Low Noise: 1uV RMS Noise
Very Low Offset Error: 5uV
Very Low Full-Scale Error: 0.16LSB
No Calibration Required: Automatic, Transparent Offset/Full-Scale Calibration
Simultaneous 50Hz/60Hz Notch Frequency Filter
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 high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
Note: LT, LTC, and are registered trademarks and No Latency Delta-Sigma is a trademark of Linear Technology Corp.
