Posted in | News | Optics and Photonics

Analog Devices Announces Highly Integrated Precision Analog Microcontrollers for Optical Drivers

Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications, today introduced a pair of highly integrated precision analog microcontrollers featuring on-chip memory, data converters, and other analog peripherals that combine to deliver the highest level of programmability and smallest package size.

Effective for digital diagnostics in optical transceivers and modules based on both fixed and tunable frequency lasers, the ADuC7023 and ADuC7122 precision analog microcontrollers use an ARM7 processor with up to 126 KB of flash memory to ensure the accurate control of optical drivers and diagnostics.

The new microcontrollers feature on-chip 12-bit ADCs (analog-to-digital converters) and DACs (digital-to-analog converters), which reduce the size of the overall solution by up to 75 percent compared to competing discrete solutions. The devices support interrupt nesting and up to 16 levels of interrupt priority, and retain DAC and GPIO outputs during a software or watchdog reset, which are of particular benefit to optical module designers.

ADuC7122 Analog Microcontroller Boosts Control Functions in Tunable Optical Modules

The ADuC7122 includes a 32-bit ARM7TDMI processor core operating at 41.78 MHz with 8 KB (kilobytes) of on-chip SRAM and 128 KB of on-chip EEPROM memory with software-triggered in-circuit re-programmability. While competing devices use PWMs (pulse-width modulators) and lower performance ADCs to perform monitoring and control functions, the ADuC7122 microcontroller features a 14-channel, 12-bit, 1-MSPS SAR (successive-approximation register) ADC, 12 buffered 12-bit DACs, a programmable gain amplifier and an on-chip temperature sensor. This high level of precision component integration allows for the robust monitoring and control of key parameters in tunable optical modules, resulting in higher overall system performance. The integration and precision of the ADuC7122 eases the task for the system engineer, while versatile programmability allows multiple systems to use the same component.

The ADuC7122 also features five timers, including a wake-up timer and watchdog timer, as well as two I²C interfaces, one SPI, one UART and 32 GPIO signal pins that can be independently configured as inputs, outputs or open drain. All of this functionality is provided in a tiny 7 mm × 7 mm 108-ball BGA (ball grid array) package.

ADuC7023 Analog Microcontroller for Fixed Frequency Laser Applications

For fixed frequency optical transceivers in SFP, SFP+, XFP and GPON, the ADuC7023 offers 8 KB of SRAM, 62 KB of flash/EEPROM memory, 19 general-purpose I/O (input/output) pins, three general-purpose timers and 16 programmable-logic elements. Analog peripherals include a 12-channel, 12-bit, 1-MSPS ADC, a 16-bit, 6-channel PWM and four buffered 12-bit DACs. All of this functionality is provided in a tiny 5 mm × 5 mm 32-lead LFCSP (lead frame chip scale package).

Features and Pricing

Product           ADC           DAC           Memory           Available     Temp    Price
                                                                                                             Range   Each


ADuC7122    13-ch             12 buff.       8 KB SRAM;     NOW       –10°C to   $8.90
                      12-bit             12-bit         126 KB Flash                       +95°C
                      ADC               DAC          EE

ADuC7023    12-ch             4 buff.         8 KB SRAM;     NOW       –10°C to    $3.65
                      12-bit             12-bit         62 KB Flash                       +125°C
                      ADC               DAC         EE

Complementary components include the ADN2526 laser diode driver; ADP121 CMOS linear regulator; ADP2108 step-down DC-to-DC converter; ADP3050 switching regulator; and ADP3335 voltage regulator and ADIsimPower™ power management design tool.


Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type