DS1863E-TR datasheet, PDF - EEWORLD Datasheet

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19-4883; Rev 2; 8/09

Burst-Mode PON Controller

With Integrated Monitoring

General Description

The DS1863 controls and monitors all the burst-mode

transmitter and video receiver biasing functions for a

passive optical network (PON) transceiver. It has an

APC loop with tracking-error compensation that pro-

vides the reference for the laser driver’s bias current

and a temperature-indexed lookup table (LUT) that

controls the modulation current. It continually monitors

for high output current, high bias current, and low and

high transmit power with its internal fast comparators to

ensure that laser shutdown for eye safety requirements

are met without adding external components. Five ADC

channels monitor V

CC

, internal temperature, and three

external monitor inputs (MON1, MON2, MON3) that can

be used to meet transmitter and receive monitoring

requirements.

Features

♦

Meets BPON, GPON, and GEPON Timing

Requirements for Burst-Mode Transceivers

♦

Bias Current Control Provided by APC Loop with

Tracking Error Compensation

♦

Modulation Current Is Controlled by a

Temperature-Indexed Lookup Table

♦

Supports 0dB, -3dB, -6dB Power Leveling

Settings with No Additional Calibration

♦

Internal Direct-to-Digital Temperature Sensor

♦

Five Analog Monitor Channels: Temperature, V

CC

,

MON1, MON2, and MON3

♦

Comprehensive Fault Management System with

Maskable Laser Shutdown Capability

♦

Two-Level Password Access to Protect

Calibration Data

♦

120 Bytes of Password 1 (PW1) Protected

Nonvolatile Memory

♦

128 Bytes of Password 2 (PW2) Protected

Nonvolatile Memory

♦

I

2

C-Compatible Interface for Calibration and

Monitoring

♦

Operating Voltage: 2.85V to 3.9V

♦

Operating Temperature: -40°C to +95°C

♦

16-Pin, Lead-Free TSSOP Package

DS1863

Applications

BPON, GPON, and GEPON Burst-Mode Transmitters

Laser Control and Monitoring

Broadband Local Access

Pin Configuration

TOP VIEW

+

BEN 1

TX-D 2

N.C. 3

TX-F 4

FETG 5

SDA 6

SCL 7

GND 8

16 V

CC

15 BMD

14 MOD

13 BIAS

Ordering Information

PART

DS1863E+

DS1863E+T&R

TEMP RANGE

-40°C to +95°C

PIN-PACKAGE

16 TSSOP

+Denotes

a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

DS1863

12 GND

11 MON3

10 MON2

9 MON1

TSSOP

(173 mils)

______________________________________________

Maxim Integrated Products

1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Burst-Mode PON Controller

With Integrated Monitoring

DS1863

ABSOLUTE MAXIMUM RATINGS

Voltage on V

CC

, SDA and SCL Pin Relative

to Ground....................................................................-0.5V to 6V

Voltage on BEN, TX-D, TX-F, MON1–MON3,

BMD Relative to Ground ...............................-0.5V to V

CC

+ 0.5V

(subject to not exceeding +6V)

Operating Temperature Range ...........................-40°C to +95°C

Programming Temperature Range .........................0°C to +70°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature ...................See J-STD-020 specification

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED OPERATING CONDITIONS

(T

A

= -40°C to +95°C, unless otherwise noted.)

PARAMETER

Supply Voltage

High-Level Input Voltage (SDA, SCL, BEN)

Low-Level Input Voltage (SDA, SCL, BEN)

High-Level Input Voltage (TX-D)

Low-Level Input Voltage (TX-D)

SYMBOL

V

CC

V

IH:1

V

IL:1

V

IH:2

V

IL:2

(Note 1)

CONDITIONS

MIN

+2.85

0.7 x V

CC

-0.3

2.0

-0.3

TYP

MAX

3.9

V

CC

+ 0.3

0.3 x V

CC

V

CC

+ 0.3

0.8

UNITS

V

ELECTRICAL CHARACTERISTICS

(V

CC

= +2.85V to +3.9V, T

A

= -40°C to +95°C, unless otherwise noted.)

PARAMETER

Supply Current

Output Leakage (SDA, TX-F)

Low-Level Output Voltage

(SDA, TX-F, FETG)

High-Level Output Voltage (FETG)

FETG Before Recall

Input Leakage Current (SCL, BEN, TX-D)

Digital Power-On Reset

Analog Power-On Reset

I

LI:1

POD

POA

1.0

2.1

SYMBOL

I

CC

I

LO

V

OL

V

OH

I

OL

= 4mA

I

OL

= 6mA

I

OH

= 4mA (Note 2)

(Note 3)

V

CC

– 0.4

10

100

1

2.2

2.75

(Notes 1, 2)

CONDITIONS

MIN

TYP

5

MAX

7

1

0.4

0.6

UNITS

mA

µA

V

nA

µA

V

ANALOG INPUT CHARACTERISTICS (BMD)

(V

CC

= +2.85V to +3.9V

,

T

A

= -40°C to +95°C

,

unless otherwise noted.)

PARAMETER

BMD Full-Scale Voltage Range

Resolution

V

APC

Error

V

APC

Integral Nonlinearity

V

APC

Differential Nonlinearity

V

APC

Temp Drift

Input Resistance

SYMBOL

V

APC

(Note 4)

T

A

= +25°C (Note 5)

-1.75

-1

-2.5

35

50.0

CONDITIONS

MIN

TYP

2.5

8

+1.75

+1

+2.5

65

MAX

UNITS

V

bits

%FS

LSB

%FS

kΩ

2

_____________________________________________________________________

Burst-Mode PON Controller

With Integrated Monitoring

ANALOG OUTPUT CHARACTERISTICS

(V

CC

=

+2.85V to +3.9V, T

A

= -40°C to +95°C, unless otherwise noted.)

PARAMETER

BIAS Current

I

BIAS

Shutdown Current

Voltage at I

BIAS

MOD Full-Scale Voltage

MOD Output Impedance

V

MOD

Error

V

MOD

Integral Nonlinearity

V

MOD

Differential Nonlinearity

V

MOD

Temperature Drift

V

MOD

(Note 6)

(Note 7)

T

A

= +25°C (Note 8)

-1.25

-1

-2

SYMBOL

I

BIAS

I

BIAS:OFF

0.7

(Note 1)

CONDITIONS

MIN

TYP

1.2

10

1.2

1.25

3.14

+1.25

+1

+2

100

1.4

MAX

UNITS

mA

nA

V

kΩ

%FS

LSB

%FS

DS1863

CONTROL LOOP AND QUICK-TRIP TIMING CHARACTERISTICS

(V

CC

=

+2.85V to +3.9V, T

A

= -40°C to +95°C, unless otherwise noted.)

PARAMETER

First BMD Sample Following BEN

Remaining Updates During BEN

BEN High Time

BEN Low Time

BIAS and MOD Turn-Off Delay

BIAS and MOD Turn-On Delay

FETG Turn-On Delay

FETG Turn-Off Delay

Binary Search Time

ADC Round-Robin Time

SYMBOL

t

FIRST

t

REP

t

BEN:HIGH

t

BEN:LOW

t

OFF

t

ON

t

FETG:ON

t

FETG:OFF

t

SEARCH

t

RR

(Note 10)

5

(Note 9)

420

96

5

13

65

ns

µs

BIAS

Samples

ms

CONDITIONS

MIN

TYP

MAX

UNITS

ANALOG VOLTAGE MONITORING

(V

CC

=

+2.85V to +3.9V, T

A

= -40°C to +95°C, unless otherwise noted.)

PARAMETER

ADC Resolution

Input/Supply Accuracy

(MON1, MON2, MON3, V

CC

)

Update Rate for Temperature, MON1,

MON2, MON3, V

CC

Input/Supply Offset

(MON1, MON2, MON3, V

CC

)

Factory

Setting

MON1, MON2, MON3

V

CC

Full scales are user programmable

ACC

t

FRAME:1

V

OS

(Note 11)

At factory setting

SYMBOL

CONDITIONS

MIN

TYP

13

0.25

52

0

2.5

6.5536

0.5

70

5

MAX

UNITS

Bits

%FS

ms

LSB

V

_____________________________________________________________________

3

Burst-Mode PON Controller

With Integrated Monitoring

DS1863

I

2

C AC ELECTRICAL CHARACTERISTICS

(V

CC

= +2.85V to +3.9V, T

A

= -40°C to +95°C, unless otherwise noted, see Figure 9.)

PARAMETER

SCL Clock Frequency

Clock Pulse-Width Low

Clock Pulse-Width High

Bus Free Time Between STOP and

START Condition

START Hold Time

START Setup Time

Data-In Hold Time

Data-In Setup Time

Rise Time of Both SDA and

SCL Signals

Fall Time of Both SDA and

SCL Signals

STOP Setup Time

Capacitive Load for Each Bus Line

EEPROM Write Time

SYMBOL

f

SCL

t

LOW

t

HIGH

t

BUF

t

HD:STA

t

SU:STA

t

HD:DAT

t

SU:DAT

t

R

t

F

t

SU:STO

C

B

t

W

(Note 13)

(Note 14)

(Note 13)

(Note 12)

CONDITIONS

MIN

0

1.3

0.6

1.3

0.6

0

100

20 + 0.1C

B

20 + 0.1C

B

0.6

400

20

300

0.9

TYP

MAX

400

UNITS

kHz

µs

ns

µs

pF

ms

NONVOLATILE MEMORY CHARACTERISTICS

(V

CC

=

+2.85V to +3.9V, unless otherwise noted.)

PARAMETER

EEPROM Write Cycles

SYMBOL

+70°C

CONDITIONS

MIN

50,000

TYP

MAX

UNITS

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

Note 6:

Note 7:

Note 8:

Note 9:

Note 10:

Note 11:

Note 12:

Note 13:

Note 14:

All voltages are referenced to ground. Currents into the IC are positive and out of the IC are negative.

Digital Inputs are at rail. FETG is disconnected SDA = SCL = 1.

See the

Safety Shutdown (FETG) Output

section for details.

Eight ranges allow the full-scale range to change from 625mV to 2.5V.

This specification applies to the expected full-scale value for the selected range. See the Comp Ranging byte for available

full-scale ranges.

Eight ranges allow the full-scale range to change from 312.5mV to 1.25V.

The output impedance of the DS1863 is proportional to its scale setting. For instance, if using the 1/2 scale, the output

impedance would be 1.5kΩ.

This specification applies to the expected full-scale value for the selected range. See the Mod Ranging byte for available

full-scale ranges.

See the

APC/Quick-Trip Sample Timing

section for details.

Assuming an appropriate initial step is programmed that would cause the power to exceed the APC set point within 4

steps, the bias current will be within 1% within the time specified by the binary search time.

Guaranteed by design.

I

2

C interface timing shown is for fast-mode (400kHz) operation. This device is also backward-compatible with I

2

C stan-

dard-mode timing.

C

B

—total capacitance of one bus line in picofarads.

EEPROM write begins after a STOP condition occurs.

4

_____________________________________________________________________

Burst-Mode PON Controller

With Integrated Monitoring

DS1863

Typical Operating Characteristics

(

V

CC

= 3.3V, T

A

= +25°C, unless otherwise noted.)

SUPPLY CURRENT vs. SUPPLY VOLTAGE

DS1863 toc01

SUPPLY CURRENT vs. TEMPERATURE

3.45

3.40

SUPPLY CURRENT (mA)

3.35

MOD DNL (LSB)

3.30

3.25

3.20

3.15

3.10

3.05

3.00

V

CC

= 3.9V

V

CC

= 2.85V

SDA = SCL = V

CC

DS1863 toc02

MOD DNL

0.8

0.6

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

DS1863 toc03

4.00

3.85

3.70

SUPPLY CURRENT (mA)

3.55

3.40

3.25

3.10

2.95

2.80

2.65

2.50

2.85

3.35

3.85

4.35

V

CC

(V)

4.85

5.35

-40°C

+25°C

SDA = SCL = V

CC

+95°C

3.50

1.0

-40

-20

0

20

40

60

80

100

0

50

TEMPERATURE (°C)

100

150

200

MOD INPUT CODE (DEC)

250

MOD INL

DS1863 toc04

CALCULATED AND DESIRED % CHANGE

IN V

MOD

vs. MOD RANGING

DS1863 toc05

DESIRED AND CALCULATED CHANGE

IN V

BMD

vs. COMP RANGING

90

80

CHANGE IN V

BMD

(%)

70

60

50

40

30

20

10

0

DESIRED VALUE

CALCULATED VALUE

DS1863 toc06

DS1863 toc09

1.0

0.8

0.6

0.4

MOD INL (LSB)

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

0

50

150

200

MOD INPUT CODE (DEC)

100

90

80

CHANGE IN V

MOD

(%)

70

60

50

40

30

20

10

0

DESIRED VALUE

CALCULATED VALUE

100

250

000 001 010 011 100 101 110 111

MOD RANGING VALUE (DEC)

000 001 010 011 100 101 110 111

COMP RANGING (DEC)

MON1–3 DNL

DS1863 toc07

MON1–3 INL

0.8

0.6

MON1–3 INL (LSB)

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

V

BMD

INL (LSB)

USING FACTORY-PROGRAMMED

FULL-SCALE VALUE OF 2.5V

DS1863 toc08

V

BMD

INL vs. APC INDEX

1.0

0.8

0.6

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

1.0

0.8

0.6

MON1–3 DNL (LSB)

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

0

0.5

1.0

1.5

2.0

USING FACTORY-PROGRAMMED

FULL-SCALE VALUE OF 2.5V

1.0

2.5

0

0.5

1.0

1.5

2.0

2.5

0

50

MON1–3 INPUT VOLTAGE (V)

100

150

APC INDEX (DEC)

200

250

_____________________________________________________________________

5

Parameter Name	Attribute value
Product Attribute	Attribute Value
Manufacturer	Maxim
Product Category	Laser Drivers
RoHS	Details
Packaging	Cut Tape
Packaging	MouseReel
Packaging	Reel
Factory Pack Quantity	1000

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