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New
Product News
DATA-ACQUISITION
AND PROCESSING SYSTEM
The new ADuC845 features two 24-bit sigma-delta ADCs
with 10 single-ended or five fully differential channels
on a single chip. This technology is integrated with a fast,
programmable, 8-bit, single-cycle, 8052 flash memory controller.
The device eliminates design complexity while maintaining
extremely low noise performance.
The
ADC’s throughput rate is 1.3 kHz (maximum), and the on-chip
code flash/EE memory space allows for in-circuit reprogrammability,
while the separate data memory space provides a nonvolatile
read/write block with security enhancements. Another key
feature is the patented high-frequency "chopping"
scheme that is implemented on both the primary and auxiliary
ADCs, which results in excellent DC-offset and offset-drift
specifications.
The
device includes a temperature sensor, a PGA on the primary
ADC to allow direct measurement of low-level signals, a
12-bit voltage output DAC, dual PWM outputs, two current
sources, and a reference. It also includes an oscillator
and PLL, which generate the 12.58-MHz clock from a 32-kHz
crystal and UART, SPI, and I2C communications
ports. The device is available in three memory configurations:
62-, 32-, and 8-KB flash memory code space.
For
simpler cost-conscious applications, the ADuC847 is available
that eliminates the second ADC and the DAC. The ADuC845
costs $13.16, $14.83, and $16.68 in
1000-piece quantities for the three memory options, respectively.
The ADuC847 costs at $9.42, $11.26, and $12.98
in 1000-piece quantities, respectively.
Analog
Devices, Inc.
(781) 937-1428
www.analog.com
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