Rainbow-electronics DS1858 Manual do Utilizador Página 1

Consulte online ou descarregue Manual do Utilizador para Hardware de computador Rainbow-electronics DS1858. Rainbow Electronics DS1858 User Manual Manual do Utilizador

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DS1858
Dual Temperature-Controlled Resistors with
Three Monitors
______________________________________________ Maxim Integrated Products 1
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The DS1858 dual temperature-controlled nonvolatile
(NV) variable resistors with three monitors consists of
two 50k 256-position linear variable resistors, three
analog monitor inputs (MON1, MON2, MON3), and a
direct-to-digital temperature sensor. The device pro-
vides an ideal method for setting and temperature-com-
pensating bias voltages and currents in control
applications using minimal circuitry. The variable resis-
tor settings are stored in EEPROM memory and can be
accessed over the 2-wire serial bus.
Applications
Optical Transceivers
Optical Transponders
Instrumentation and Industrial Controls
RF Power Amps
Diagnostic Monitoring
Features
Five Total Monitored Channels (Temperature,
V
CC
, MON1, MON2, MON3)
Three External Analog Inputs (MON1, MON2,
MON3)
Internal Direct-to-Digital Temperature Sensor
Two 50k, Linear, 256-Position, Nonvolatile
Temperature-Controlled Variable Resistors
Resistor Settings Changeable Every 2°C
Access to Monitoring and ID Information
Configurable with Separate Device Addresses
2-Wire Serial Interface
Two Buffers with TTL/CMOS-Compatible Inputs
and Open-Drain Outputs
Operates from a 3.3V or 5V Supply
SFF-8472 Compatible
Ordering Information
Rev 0; 1/03
PART
TEMP RANGE
PIN-PACKAGE
DS1858E-050
-40°C to +95°C
16 TSSOP
DS1858E-050/T&R -40°C to +95°C
16 TSSOP
(Tape-and-Reel)
DS1858B-050
-40°C to +95°C
16-Ball CSBGA
A
TOP VIEW
B
C
D
1
16-BALL CSBGA (4mm x 4mm)
1.0mm PITCH
16 TSSOP
324
MON3
OUT1IN2
MON1
L0GND
WPEN
L1
H0SDA
OUT2
H1
V
CC
SCLIN1
MON2
DS1858
SDA
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SCL
OUT1
IN1
OUT2
IN2
WPEN
GND
V
CC
H1
L1
H0
L0
MON3
MON2
MON1
Pin Configurations
DS1858
SDA
1
2
3
4
5
6
7
8
16
0.1µF
15
14
13
12
11
10
9
SCL
OUT1
IN1
OUT2
IN2
WPEN
GND
V
CC
H1
L1
H0
L0
MON3
MON2
MON1
GROUND TO
DISABLE WRITE
PROTECT
Tx POWER*
DIAGNOSTIC
INPUTS
0 TO 2.5V FS
TO LASER
MODULATION
CONTROL
TO LASER BIAS
CONTROL
DECOUPLING
CAP
Rx POWER*
Tx BIAS*
*Rx POWER, Tx BIAS, AND Tx POWER CAN BE
ARBITRARILY ASSIGNED TO THE MON INPUTS
V
CC
V
CC
= 3.3V
4.7k4.7k
Tx-FAULT
LOS
2-WIRE
INTERFACE
Typical Operating Circuit
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Resumo do Conteúdo

Página 1 - Three Monitors

DS1858Dual Temperature-Controlled Resistors withThree Monitors______________________________________________ Maxim Integrated Products 1For pricing de

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DS1858Dual Temperature-Controlled Resistors withThree Monitors10 ____________________________________________________________________ADEN(ADDRESSENABL

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DS1858Dual Temperature-Controlled Resistors withThree Monitors____________________________________________________________________ 11Variable Resistor

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DS1858Dual Temperature-Controlled Resistors withThree Monitors12 ____________________________________________________________________MEMORY LOCATION(h

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DS1858Dual Temperature-Controlled Resistors withThree Monitors____________________________________________________________________ 13MEMORYLOCATION(he

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DS1858Dual Temperature-Controlled Resistors withThree Monitors14 ____________________________________________________________________MEMORYLOCATION(he

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DS1858Dual Temperature-Controlled Resistors withThree Monitors____________________________________________________________________ 15MEMORYLOCATION(he

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DS1858Dual Temperature-Controlled Resistors withThree MonitorsMEMORYLOCATION(hex)EEPROM/SRAMR/WDEFAULTSETTING(hex)NAME OFLOCATIONFUNCTION80 SRAM R/W M

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DS1858Dual Temperature-Controlled Resistors withThree Monitors____________________________________________________________________ 17MEMORYLOCATION(he

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DS1858Dual Temperature-Controlled Resistors withThree Monitors18 ____________________________________________________________________Temperature Conve

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DS1858Dual Temperature-Controlled Resistors withThree Monitors____________________________________________________________________ 19section). If the

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DS1858Dual Temperature-Controlled Resistors withThree Monitors2 _____________________________________________________________________PARAMETERSYMBOLCO

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DS1858Dual Temperature-Controlled Resistors withThree Monitors20 ____________________________________________________________________slaves. The bus m

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devices on the bus is to be accessed. When read-ing or writing the DS1858, the device-select bitsmust match one of two valid device addresses,00h or t

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DS1858Dual Temperature-Controlled Resistors withThree MonitorsSDASCLtHD:STAtLOWtHIGHtRtFtBUFtHD:DATtSU:DATREPEATEDSTARTtSU:STAtHD:STAtSU:STOtSPSTOP ST

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DS1858Dual Temperature-Controlled Resistors withThree Monitors_____________________________________________________________________ 3PARAMETERSYMBOLCO

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DS1858Dual Temperature-Controlled Resistors withThree Monitors4 _____________________________________________________________________PARAMETERSYMBOLCO

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DS1858Dual Temperature-Controlled Resistors withThree Monitors_____________________________________________________________________ 5AC ELECTRICAL CHA

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DS1858Dual Temperature-Controlled Resistors withThree Monitors6 _____________________________________________________________________Typical Operating

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Dual Temperature-Controlled Resistors withThree Monitors_____________________________________________________________________ 7Detailed DescriptionThe

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DS1858Dual Temperature-Controlled Resistors withThree Monitors8 _____________________________________________________________________DEVICEADDRESSAD (

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DS1858Dual Temperature-Controlled Resistors withThree Monitors_____________________________________________________________________ 9Monitored Signals

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