DS1863E+ datasheet(11/62 Pages) MAXIM

Part #	DS1863E+

Description	Burst-Mode PON Controller With Integrated Monitoring

Download	62 Pages

Scroll/Zoom	100%

Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

Logo

11 / 62 page

Burst-Mode PON Controller

With Integrated Monitoring

____________________________________________________________________

11

Monitors And Fault Detection

Monitors

Monitoring functions on the DS1863 include four quick-

trip comparators and five ADC channels

This monitoring combined with the interrupt masks

determines when/if the DS1863 shuts down its outputs

and triggers the TX-F and FETG outputs. All of the mon-

itoring levels and interrupt masks are user programma-

ble with the exception of POA, which trips at a fixed

range and is non-maskable for safety reasons.

Four Quick-Trip Monitors And Alarms

Four quick-trip monitors are provided to detect potential

laser safety issues. These monitor

1) High Bias Current (HBIAS)

2) Low Transmit Power (LTXP)

3) High Transmit Power (HTXP)

4) Max Output Current (MAX IBIAS)

The high and low transmit power quick-trip registers

(HTXP and LTXP) set the thresholds used to compare

against the BMD voltage to determine if the transmit

power is within specification. The HBIAS quick-trip

compares the MON1 input (generally from the

MAX3643 bias monitor output) against its threshold set-

ting to determine if the present bias current is above

specification. The Max Bias quick-trip is a digital com-

parison that determines if the Bias Output code indi-

cates the bias current is above specification. The bias

current will not be allowed to exceed the value set in

this register. When the DS1863 detects the bias is at

the limit it will set the BIAS MAX status bit and hold the

bias current at the MAX IBIAS level. The quick-trips are

routed to the TX-F and FETG outputs via interrupt

masks to allow combinations of these alarms to be

used to trigger these outputs. Any time FETG is trig-

gered the DS1863 will also disable its outputs. All the

quick-trip alarm levels and masks are programmable

through the I2C interface.

Five ADC Monitors And Alarms

The ADC monitors five channels that measure tempera-

ture (internal temp sensor), VCC, MON1, MON2, and

MON3 using an analog multiplexer to measure them

round robin with a single ADC. Each channel has a

customer programmable full scale range and offset

value that will be factory programmed to default value

(see below). Additionally, MON1, MON2, and MON3

have the ability to right shift results by up to 7 bits

before the results are compared to alarm thresholds or

read over the I2C bus. This allows customers with spec-

ified ADC ranges to calibrate the ADC full scale to a

factor of 1/2n of their specified range to measure small

signals. The DS1863 can then right shift the results by n

bits to maintain the bit weight of their specification.

The ADC results (after right shifting, if used) are com-

pared to high alarm thresholds (to check if the results

exceeded this threshold), the low alarm thresholds (to

check if the ADC results are below this threshold) and

the warning threshold after each conversion (20 com-

parisons total), and the corresponding alarms are set

which can be used to trigger the TX-F or FETG outputs.

These ADC thresholds are user programmable via the

I2C interface, as are the masking registers that can be

APC LOOP/QUICK TRIP SAMPLE TIMING

LAST BURST'S

BIAS SAMPLE

BEN

BIAS DAC

CODE

QUICK-TRIP

SAMPLE TIMES

HBIAS

SAMPLE

tFIRST

tREP

H/LTXP

SAMPLE

BIAS

SAMPLE

BIAS

SAMPLE

BIAS

SAMPLE

BIAS

SAMPLE

BIAS

SAMPLE

BIAS

SAMPLE

BIAS

SAMPLE

Figure 3. APC/Quick-Trip Alarm Sample Timing.

ADC Default Monitor Full Scale Ranges

SIGNAL (UNITS)

+ FS

SIGNAL

+ FS

HEX

- FS

SIGNAL

- FS

HEX

Temperature (

oC)

127.996

7FFF

-128

8000

VCC (V)

6.5528

FFF8

0V

0000

MON1, MON2,

MON3 (V)

2.4997

FFF8

0V

0000

Similar Part No. - DS1863E+

Manufacturer	Part #	Datasheet	Description
Maxim Integrated Produc...	DS1861	278Kb / 25P	Full Laser Control with Fault Management Rev 0; 5/05
	DS1861E	278Kb / 25P	Full Laser Control with Fault Management Rev 0; 5/05
	DS1861E	278Kb / 25P	Full Laser Control with Fault Management Rev 0; 5/05
	DS1861E++	278Kb / 25P	Full Laser Control with Fault Management Rev 0; 5/05
	DS1862	533Kb / 42P	XFP Laser Control and Digital Diagnostic IC Rev 0; 2/06

More results

Similar Description - DS1863E+

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCD5042	134Kb / 28P	DECT burst mode controller 1996 Oct 31
	PCD5041	134Kb / 28P	DECT burst mode controller 1996 Oct 31
	PCD5043	109Kb / 24P	DECT burst mode controller 1996 Oct 31
National Semiconductor ...	NSBMC290-16	318Kb / 20P	Burst Mode Memory Controller
Vitesse Semiconductor C...	VSC7965	1Mb / 2P	PON Integrated 155 Mbps to 1.25 Gbps Burst-mode Laser Driver and Limiting Amplifier
Vitesse Semiconductor C...	VSC7967	610Kb / 2P	PON Integrated 155 Mbps to 2.5 Gbps Burst-mode Laser Driver and Limiting Amplifier
Maxim Integrated Produc...	DS1865	522Kb / 67P	PON Triplexer Control and Monitoring Circuit Rev 1; 11/09
Maxim Integrated Produc...	DS1865	530Kb / 66P	PON Triplexer Control and Monitoring Circuit Rev 0; 3/07
Micrel Semiconductor	SY88236L	1Mb / 19P	2.5Gbps Burst Mode Laser Driver with Integrated Limiting Amplifier
Richtek Technology Corp...	R7731	542Kb / 11P	Burst Triple Mode PWM Flyback Controller March 2011

More results

DS1863E+ Datasheet(PDF) 11 Page - Maxim Integrated Products

DS1863E+ Datasheet(HTML) 11 Page - Maxim Integrated Products

Similar Part No. - DS1863E+

Similar Description - DS1863E+

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

Datasheet Download

Link URL