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TPAFEA003A

High Precision Silicon Photonic AFE with 4 IDACs, 12 VDACs and Multi-channel ADC

  • Overview
  • Development Resources
  • Application
  • Ordering Detail

Overview

The TPAFEA003A is a highly integrated controller and monitor optimzed for silicon photonics module. The TPAFEA003A include four 12-bit current output DACs (IBIAS), twelve 12-bit voltage output DACs (Heater Bias), up to 21 channels multi-IO and a 12-bit, 500-kSPS ADC. The TPAFEA003A also include four 12-bit general purpose DACs (GDAC) and four analog comparators.

The IBIAS in TPAFEA003A support a full-scale output range of 350mA per channel, and support using in multichannel parallel mode, providing sufficient bias current for the lasers of silicon photonic modules. The IBIAS power supply voltage pin supports a voltage range of 0.5 V to 2.5 V, and the power supply voltage drop from PVDD to IBIAS pin can be as low as 150mV under 350mA output. For lasers of different specifications, it can achieve very high system efficiency and excellent temperature performance. The IBIAS is also capable of fast shutting down by external hardware pins EN_IBIAS 0 to 3.

The Heater Bias in TPAFEA003A provides both current source and sink capability, with a maximum current of ±60mA per channel, make it suitable for DC bias of MachZehnder modulators (MZM). Additionally, the power supply of Heater Bias, VDRIVE0 and VDRIVE1, are not limited by VDD, and VDRIVE0 and VDRIVE1 can be different from each other.

The ADC in TPAFEA003A is a 500 kSPS SAR ADC with up to 21 channels. Which can be used as current measurement of monitor photodoide (mPD), received signal shrength indicator (RSSI) or other voltage or current monitoring. The equal current measurement full scale range is from 50 μA to 10 mA. Most of the ADC channels include current mirrors with a 1 : 1 or 1 : 3 current ratio. The current mirror eliminates the need for external pull-down resistors for the mPD and support both common cathod and common anode topologies. The ADC also provides 16 channels software alarm with programable threshold. Besides, the TPAFEA003A also support external ADC measurement.

The analog comparators in TPAFEA003A is for the fast loss of signal (LOS) report, and the GDACs can be use as either comparator reference inputs or general purpose DAC outputs.

The TPAFEA003A is featured with small size and high integration, wide supply range and operating temperature range, which make the device an excellent choice for high speed silicon-photonics modules.


  • Status

    Preview

  • Rating

    Industrial

  • ADC Input Channel

    21

  • ADC Resolution (Bits)

    12

  • ADC Input Range (V)

    0~VREF,0~2*VREF

  • DAC Channel

    16

  • DAC Resolution (Bits)

    12

  • DAC Output Type

    4 Voltage,12 Current

  • DAC Output Range

    Voltage: 5V,2.5V,2.5V,5V Current: 200mA，350mA

  • GPIO Number

    21

  • VREF

    Internal

  • Temperature Sensor

    NA

  • Interface

    SPI/I2C

  • Features

    4 IDACs,12 VDACs，21MIO

  • Temperature Range (℃)

    -40 to +125

  • Package

    WLCSP

Development Resources

  • Documentation

Application

    • 800G and 1.6T silicon photonics module

Ordering Detail

Order Part Number Buy Samples Rating Feature Status 1ku Price Release Date Package Lead time (week) MSL Packing MPQ CPQ

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