DS1878T+T by Analog Devices

SFP+ Controller with Digital LDD Interface


The DS1878 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality. The combination of the DS1878 with Maxim laser driver/limiting amplifier solutions supports VCSEL, DFB, and EML-based solutions. The device provides APC loop, modulation current control, and eye safety functionality. It continuously monitors for high output current, high bias current, and low and high transmit power to ensure that laser shutdown for eye safety requirements are met without adding external components. Six ADC channels monitor VCC, temperature, and four external monitor inputs (MON1–MON4) that can be used to meet all monitoring requirements. MON3 is differential with support for common mode to VCC. Two digital-to-analog (DAC) outputs with temperature-indexed lookup tables (LUTs) are available for additional control functionality.

Where to Buy

Prices starting from US$3.17

Distributor Stock
Logo for Analog Devices
Analog Devices
from US$3.17
33,691
in stock
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Logo for Farnell UK
Farnell
from US$3.47
0
in stock
Buy Now
Buy Now

Features

Meets All SFF-8472 Control and Monitoring Requirements
Laser Bias Controlled by APC Loop and Temperature LUT to Compensate for Tracking Error
Laser Modulation Controlled by Temperature LUT
Six Analog Monitor Channels: Temperature, VCC, MON1–MON4 MON1–MON4 Support Internal and External Calibration Scalable Dynamic Range Internal Direct-to-Digital Temperature Sensor Alarm and Warning Flags for All Monitored Channels
MON1–MON4 Support Internal and External Calibration
Scalable Dynamic Range
Internal Direct-to-Digital Temperature Sensor
Alarm and Warning Flags for All Monitored Channels
Two 9-Bit Delta-Sigma Outputs with 36 Entry Temperature LUTs
Digital I/O Pins: Five Inputs, Four Outputs
Comprehensive Fault-Measurement System with Maskable Laser Shutdown Capability
Flexible, Two-Level Password Scheme Provides Three Levels of Security
256 Additional Bytes Located at A0h Slave Address
I²C-Compatible Interface
3-Wire Master to Communicate with a Maxim Laser Driver/Limiting Amplifier
+2.85V to +5.5V Operating Voltage Range
-40°C to +95°C Operating Temperature Range
28-Pin TQFN (5mm x 5mm x 0.75mm) Package

Specifications

ADCs 5-Input Muxable
Resolution (bits) 13
# DACs/ Resistors 2 DACs
FS Out (kΩ) None
Steps None
Temp. Sensor Internal
Memory EEPROM
VSUPPLY (V) 2.85 to 3.9
Control Interface I2C
Package/Pins TQFN/28
BudgetaryPrice (See Notes) 2.13

Last 6 months Inventory & Pricing History



DS1878T+T Semiconductors - ICs by Analog Devices

LASER DRIVER SFF/SFP TQFN-28

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Laser Driver Type SFP / SFF Optical Modules
Driver Case Style TQFN
No. of Pins 28Pins
Supply Voltage Min 2.85V
Supply Voltage Max 5.5V
Product Range -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Last 6 months Inventory & Pricing History


Alternative Descriptions

SFP+ Controller with Digital L | Analog Devices
LASER DRIVER, SFF/SFP, TQFN-28 | Farnell

Frequently Asked Questions

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Is the DS1878T+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS1878T+T have stock available?

Authorised distributors including Analog Devices and Farnell have stock available or on a lead time for DS1878T+T .

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