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DS1858 Datasheet

  • DS1858

  • Dual Temperature-Controlled Resistors with Three Monitors

  • Maxim   Maxim

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Rev 0; 1/03
Dual Temperature-Controlled Resistors with
Three Monitors
General Description
The DS1858 dual temperature-controlled nonvolatile
(NV) variable resistors with three monitors consists of
two 50k鈩?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.
Features
鈾?/div>
Five Total Monitored Channels (Temperature,
V
CC
, MON1, MON2, MON3)
鈾?/div>
Three External Analog Inputs (MON1, MON2,
MON3)
鈾?/div>
Internal Direct-to-Digital Temperature Sensor
鈾?/div>
Two 50k鈩? Linear, 256-Position, Nonvolatile
Temperature-Controlled Variable Resistors
鈾?/div>
Resistor Settings Changeable Every 2擄C
鈾?/div>
Access to Monitoring and ID Information
Configurable with Separate Device Addresses
DS1858
Applications
Optical Transceivers
Optical Transponders
Instrumentation and Industrial Controls
RF Power Amps
Diagnostic Monitoring
鈾?/div>
2-Wire Serial Interface
鈾?/div>
Two Buffers with TTL/CMOS-Compatible Inputs
and Open-Drain Outputs
鈾?/div>
Operates from a 3.3V or 5V Supply
鈾?/div>
SFF-8472 Compatible
Typical Operating Circuit
PART
V
CC
V
CC
= 3.3V
4.7k鈩?/div>
2-WIRE
INTERFACE
Tx-FAULT
4.7k鈩?/div>
1
2
3
4
5
LOS
GROUND TO
DISABLE WRITE
PROTECT
6
7
8
SDA
SCL
OUT1
IN1
OUT2
IN2
WPEN
GND
V
CC
H1
L1
16
15
14
DECOUPLING
CAP
Ordering Information
TEMP RANGE PIN-PACKAGE
-40擄C to +95擄C 16 TSSOP
-40擄C to +95擄C
16 TSSOP
(Tape-and-Reel)
DS1858E-050
DS1858E-050/T&R
DS1858B-050
0.1碌F
-40擄C to +95擄C 16-Ball CSBGA
TO LASER BIAS
CONTROL
TO LASER
MODULATION
CONTROL
Pin Configurations
TOP VIEW
A
IN1
SCL
V
CC
H1
1 SDA
2 SCL
B
OUT2
SDA
H0
3 OUT1
L1
4 IN1
5 OUT2
MON3
6 IN2
7 WPEN
MON2
4
8 GND
V
CC
16
H1 15
L1 14
H0 13
DS1858
13
H0
12
L0
MON3
MON2
MON1
11 Tx POWER*
10 Rx POWER*
9 Tx BIAS*
DIAGNOSTIC
INPUTS
0 TO 2.5V FS
*Rx POWER, Tx BIAS, AND Tx POWER CAN BE
ARBITRARILY ASSIGNED TO THE MON INPUTS
C
DS1858
WPEN
IN2
OUT1
L0 12
MON3 11
MON2 10
MON1 9
D
GND
1
L0
2
MON1
3
16-BALL CSBGA (4mm x 4mm)
1.0mm PITCH
16 TSSOP
______________________________________________
Maxim Integrated Products
1
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

DS1858 PDF文件相關型號

DS1858B-050,DS1858E-050,DS1858E-050/T&R

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