Analog Devices adds two new precision microcontrollers for optical modules to its ARM family.

ADuC7023, ADuC7122 based on ARM7 core, with converter cores on board.

Loring Wirbel, Contributing Editort -- EDN, 1/21/2010 12:11:00 PM

Analog Devices Inc. has introduced the ADuC7023 and ADuC7122, two precision analog microcontrollers designed for optical transceiver applications.  Both feature 12-bit A/D and D/A converters, and are based on a 32-bit, 41.78-MHz ARM7 core.  The ADuC7023 is designed for fixed-frequency laser applications in SFP, SFP+, GPON, and similar applications, while the ADuC 7122 is designed for emerging tuneable laser applications.

The ADuC7122 has an ARM7 core with 8 Kbytes of SRAM and 128 Kbytes of EEPROM on chip.  It combines a 14-channel, 1-Msample/sec 21-bit successive approximation register A/D converter with 12 buffered 12-bit D/A converters.  Also on-chip are a temperature sensor, programmable gain amp, five timers, and a variety of I/O options, including dual I2C, SPI, and UART.

The ADuC7023 has a similar ARM7 core with 8Kbytes of SRAM and 62 Kbytes of EEPROM.  It combines a 12-channel, 12-bit A/D converter with four 12-bit D/A converters and a 16-bit, six-channel PWM.  The controller offers 19 general-purpose I/O pins, three general-purpose timers, and 16 programmable logic elements.

In quantities of 1000, price starts at $3.65 each for the ADuC7023, in 32-lead LFPCSP; and $8.90 each for the ADuC7122 in 108-ball BGA.