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DS1884
SFP and PON ONU Controller
with Digital LDD Interface
General Description
The DS1884 controls and monitors all functions for SFF,
SFP, and SFP+ modules including all SFF-8472 function-
ality. The combination of the DS1884 with the MAX3710
supports all transmitter and receiver functionality. The
DS1884 includes modulation current control and APC
set-point control with tracking error adjustment. It continu-
ally monitors RSSI for LOS generation. A 13-bit analog-to-
digital converter (ADC) monitors VCC, temperature, laser
bias, laser modulation, and receive power to meet all
monitoring requirements. Receive power measurement
is differential with support for common mode to VCC. A
9-bit digital-to-analog converter (DAC) is included with
temperature compensation for APD bias control.
Applications
SFF, SFP, and PON ONU Modules
Features
S
Meets All SFF-8472 Control and Monitoring
Requirements
S
Companion Controller for the MAX3710 Laser
Driver/Limiting Amplifier and MAX3945 Limiting
Amplifier
S
MAX3710/DS1884 Combination Supports
Broad Spectrum of Continuous Mode and PON
Applications Up to 2.5GHz
S
Temperature Lookup Table (LUT) to Compensate
for APC Tracking Error and Dual Closed-Loop
Variables
S
Three Laser Control Modes
Dual Closed Loop: Laser Bias and Laser
Modulation Are Automatically Controlled with
Multiple LUTs to Compensate Dual Closed-Loop
Calibration Points
APC Loop: Laser Bias Automatically Controlled,
Laser Modulation Controlled by Temperature LUT
Open Loop: Laser Bias and Laser Modulation
Are Controlled by Temperature LUTs
S
13-Bit ADC
Laser Bias, Laser Power, and Receive Power
Support Internal and External Calibration
Differential Receive Power Input
Scalable Dynamic Range
Internal Direct-to-Digital Temperature Sensor
Alarm and Warning Flags for All Monitored
Channels
S
9-Bit DAC with Temperature Compensation for
APD Bias
S
Digital I/O Pins: Transmit Disable Input/Output,
Rate Select Input/Output, LOS Input/Output,
Transmit Fault Input/Output, and IN1 Status
Monitor and Fault input
S
Comprehensive Fault Measurement System with
Maskable Alarm/Warnings
S
Flexible Password Scheme Provides Three Levels
of Security
S
256-Byte A0h and 128-Byte Upper A2h EEPROM
S
I2C-Compatible Interface
S
3-Wire Master to Communicate with the MAX3710
Laser Driver/Limiting Amplifier and MAX3945
Limiting Amplifier
19-5928; Rev 1; 7/11
For related parts and recommended products to use with this part,
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.