Analog Devices has announced five new MicroConverters and their associated QuickStart evaluation kits, adding to its family of data-acquisition systems on a chip. These devices preserve the signature analog-to-digital converter precision, enhancing the MicroConverter family by offering an eight-fold increase in on-chip memory - facilitating larger programs and C-programming. Each device offers 62 KB of flash/EE program memory, 8 KB of flash/EE data memory, and 2304 bytes of data RAM. A comprehensive suite of peripherals includes precision ADCs, voltage output DACs, PWM/sigma-delta outputs, temperature sensor, and reference. Also included are a watchdog timer, time-interval-counter, serial I/O ports (I2C, SPI & UART), and three timers/counters-timer three facilitates an accurate baud-rate generator at up to 524 kbaud.
The ADuC831, ADuC841 - drop in replacements for the ADuC812 - are for use in applications where larger memory and/or higher core speed are required. They differ in that the ADuC831 has a 12-clock-per-instruction core and a 16 MHz max clock rate, while the ADuC841 has a 1-clock-per-instruction core and a max clock rate of 16 MHz at 3 V and 25 MHz at 5 V. The high-frequency clock is supplied externally. The ADuC832, ADuC842 are identical to the ADuC831/41 respectively, except that they operate from a 32 kHz crystal, with an on-chip PLL generating the high-frequency clock. The ADuC831/32 have an 8-channel 200 kSa/s ADC and a 100 ppm/°C reference. The ADuC841/42 offer a higher throughput 8-channel ADC (up to 400 kSa/s), a more accurate reference (20 ppm/°C), an enhanced I2C interface and higher core speed.
The ADuC836 is an expanded memory version of the ADuC816. It includes dual 16-bit sigma-delta ADCs, a 12-bit DAC, temperature sensor, reference and the same digital peripheral set as detailed above. For 24-bit performance, the ADuC824/34 provides a fully compatible upgrade path. All parts are packaged in a 52-lead plastic quad flatpack and in the smaller (8 x 8 mm) chip-scale package.
Integration, precision and low power make these parts ideal for smart/remote sensor interface in industrial, instrumentation (including portable) and automotive applications, as well as for monitoring/control of critical parameters in communications infrastructure such as base stations and optical transceivers.
For more information contact Analog Data Products, 011 259 9400.
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