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DS1859 Datasheet

  • DS1859

  • 雙路、溫控電阻，內(nèi)置校準(zhǔn)監(jiān)視器

  • 1463.56KB

  • 28頁

  • MAXIM   MAXIM

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Rev 1; 11/03
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
General Description
The DS1859 dual, temperature-controlled, nonvolatile
(NV) variable resistors with three monitors consists of
two 50k鈩?or two 20k鈩? 256-position, linear, variable
resistors; three analog monitor inputs (MON1, MON2,
MON3); and a direct-to-digital temperature sensor. The
device provides an ideal method for setting and tem-
perature-compensating bias voltages and currents in
control applications using minimal circuitry. The vari-
able resistor settings are stored in EEPROM memory
and can be accessed over the 2-wire serial bus.
Features
鈾?/div>
SFF-8472 Compatible
鈾?/div>
Five Monitored Channels (Temperature, V
CC
,
MON1, MON2, MON3)
鈾?/div>
Three External Analog Inputs (MON1, MON2, MON3)
That Support Internal and External Calibration
鈾?/div>
Scalable Dynamic Range for External Analog Inputs
鈾?/div>
Internal Direct-to-Digital Temperature Sensor
鈾?/div>
Alarm and Warning Flags for All Monitored
Channels
鈾?/div>
Two 50k鈩?or Two 20k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
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>
Operating Temperature Range of -40擄C to +95擄C
DS1859
Applications
Optical Transceivers
Optical Transponders
Instrumentation and Industrial Controls
RF Power Amps
Diagnostic Monitoring
Ordering Information
PART
DS1859E-050
DS1859E-020
RESISTANCE
50k鈩?/div>
20k鈩?/div>
50k鈩?/div>
20k鈩?/div>
50k鈩?/div>
20k鈩?/div>
PIN-PACKAGE
16 TSSOP
16 TSSOP
16 TSSOP
(Tape-and-Reel)
16 TSSOP
(Tape-and-Reel)
16-Ball CSBGA
16-Ball CSBGA
Typical Operating Circuit
DS1859E-050/T&R
DS1859E-020/T&R
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
13
DECOUPLING
CAP
DS1859B-050
DS1859B-020
0.1碌F
TO LASER BIAS
CONTROL
TO LASER
MODULATION
CONTROL
A
Pin Configurations
TOP VIEW
IN1
SCL
V
CC
H1
1 SDA
2 SCL
B
OUT2
SDA
H0
3 OUT1
L1
4 IN1
C
WPEN
IN2
OUT1
5 OUT2
MON3
6 IN2
7 WPEN
MON2
4
8 GND
V
CC
16
H1 15
L1 14
H0 13
DS1859
H0
12
L0
MON3
MON2
MON1
11 Rx POWER*
10 Tx POWER*
9 Tx BIAS*
DIAGNOSTIC
INPUTS
DS1859
L0 12
MON3 11
MON2 10
MON1 9
*SATISFIES SFF-8472 COMPATIBILITY
D
GND
1
L0
2
MON1
3
CSBGA (4mm x 4mm)
1.0mm PITCH
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.

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