Optical Microcontroller

 

Part Number	Replacement	Explanation

Description

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The DS4830A is a low-power, 16-bit microcontroller with a unique peripheral set supporting optical applications that require high-resolution conversion of many analog signals and digital signal processing (DSP) of those signals, high-speed data communication to an external host, and ultra-low power dissipation. A wide variety of optical transceiver controller applications is supported without need of external circuitry, thereby minimizing cost and PCB area.

Power dissipation and throughput are optimized through the use of a programmable round-robin analog-to-digital converter (ADC) and 10-bit fast comparator, which operate completely independently of the core and significantly relieve core overhead. A dual multiply/accumulate (MAC) is included to minimize interrupt service timing/design complexity. Ten 16-bit PWM channels are included to provide an unprecedented level of precision in digital power-control applications.

The DS4830A provides a complete optical control, calibration, and monitor solution compatible with SFF-8472. Additional resources include a fast/accurate ADC, fast comparators with an internal comparison digital-to-analog converter (DAC), eight independent 12-bit DACs, an accurate internal temperature sensor, two fast sample/holds with various programmable options, and a multiprotocol serial master/slave interface. An independent, 400kHz-compliant, slave I²C interface with four configurable slave addresses facilitates communication to a host, in addition to password-protected in-system programming of the on-chip flash.

Extensive design-in and applications support are available, including comprehensive user’s and programmer’s guides, complete reference designs with documented code, and in-depth application notes showing numerous code examples in both C and assembly language. Firmware development is supported by third-party vendors.

DS4830A: Typical Operating Circuit Enlarge+

Key Features

• 16-Bit Low Power Microcontroller
• Slave Communication Interface: 400kHz without Clock Stretching I²C Compatible 2-Wire or SPI
• Master Communication Interface: 400kHz I²C-Compatible 2-Wire, SPI, or Maxim 3-Wire Laser Driver
• Pin-Compatible with DS4830
• 32KWords Flash Program Memory
• 2KWords Data RAM
• 4KWords ROM Memory
• 32-Level Stack Memory
• 2.85V to 3.63V Operating Voltage Range
• 8 Independent 12-Bit Voltage DACs with 2.5V Internal Reference or External Reference
• 10 x 16-Bit PWM Channels
  • Supports 4-Channel TECC H-Bridge Control
  • Boost/Buck DC-DC Control
  • 1MHz Switching Frequency
• 13-Bit ADC with 26-Input Mux
  • 40ksps
  • Individual Channel Averaging Option
• Two Independent Sample/Holds with Individual Channel Averaging Option
  • 1V Full Scale
  • 300ns Sample Time
• Fast Temperature Measurement with Averaging Option
  • Internal Temperature Sensor, ±2°C
• 10-Bit Fast Comparator with 16 Input Mux
• 31 GPIO Pins
• Internal 20MHz Oscillator
• Up to 133MHz External Clock for PWM and Timers
• Two 16-Bit Timers and One Programmable Watchdog Timer
• Maskable Interrupt Sources
• Fast Hardware CRC-8 for Packet Error Checking (PEC)
• I²C and JTAG Bootloader
• Four Software Interrupts
• Supply Voltage Monitor (SVM) and Brownout Monitor
• JTAG Port with In-System Debug and Programming
• Low Power Consumption (16mA) with All Analog Active
• 5mm x 5mm, 40-Pin TQFN Package

Applications/Uses

• Optical Transceivers: XFP, SFP, SFP+, QSFP+, CSFP, 40G, 100G
• PON Diplexers and Triplexers: GPON, 10GEPON, XPON OLT, ONU