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參數(shù)資料
| 型號(hào)： | DS1856B-002T |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
| 中文描述： | 雙路，溫度與內(nèi)部校準(zhǔn)監(jiān)視器和控制電阻器，密碼保護(hù) |
| 文件頁數(shù)： | 1/31頁 |
| 文件大?。?/td> | 484K |
| 代理商： | DS1856B-002T |
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D
Dual, Temperature-Controlled Resistors with Inter-
nally Calibrated Monitors and Password Protection
______________________________________________
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 DS1856 dual, temperature-controlled, nonvolatile
(NV) variable resistors with three monitors consists of
two 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 temperature-compensating
bias voltages and currents in control applications using
minimal circuitry. The variable resistor settings are
stored in EEPROM memory and can be accessed over
the 2-wire serial bus.
Relative to other members of the family, the DS1856 is
essentially a DS1859 with a DS1852-friendly memory
map. In particular, the DS1856 can be configured so
the 128 bytes of internal Auxiliary EEPROM memory is
mapped into Main Device Table 00h and Table 01h,
maintaining compatibility between both the
DS1858/DS1859 and the DS1852. The DS1856 also
features password protection equivalent to the DS1852,
further enhancing compatibility between the two.
Applications
Optical Transceivers
Optical Transponders
Instrumentation and Industrial Controls
RF Power Amps
Diagnostic Monitoring
Features
SFF-8472 Compatible
Five Monitored Channels (Temperature, V
CC
,
MON1, MON2, MON3)
Three External Analog Inputs (MON1, MON2, MON3)
That Support Internal and External Calibration
Scalable Dynamic Range for External Analog Inputs
Internal Direct-to-Digital Temperature Sensor
Alarm and Warning Flags for All Monitored
Channels
Two Linear, 256-Position, Nonvolatile Temperature-
Controlled Variable Resistors
Resistor Settings Changeable Every 2°C
Three Levels of Security
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
-40°C to +95°C Operating Temperature Range
Ordering Information
Rev 1; 4/05
PART
RES0/RES1
RESISTANCE
(k
)
PIN-PACKAGE
DS1856E-050
DS1856E-050/T&R
DS1856B-050
Ordering Information continued at end of data sheet.
+Denotes lead free.
*
Future product—contact factory for availability.
T&R denotes tape-and-reel.
All parts operate at the -40°C to +95°C temperature range.
50/50
50/50
50/50
16 TSSOP
16 TSSOP
16-Ball CSBGA
A
TOP VIEW
B
C
D
1
CSBGA (4mm x 4mm)
1.0mm PITCH
3
2
4
MON3
OUT1
IN2
MON1
L0
GND
N.C.
L1
H0
SDA
OUT2
H1
V
CC
SCL
IN1
MON2
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
SDA
V
CC
H1
L1
H0
L0
MON3
MON2
MON1
TSSOP
SCL
OUT1
IN2
IN1
OUT2
N.C.
GND
DS1856
Pin Configurations
DS1856
SDA
1
2
3
4
5
6
7
8
16
0.1
μ
F
15
14
13
12
11
10
9
SCL
OUT1
IN1
OUT2
IN2
N.C.
GND
V
CC
H1
L1
H0
L0
MON3
MON2
MON1
Rx POWER*
DIAGNOSTIC
INPUTS
TO LASER
MODULATION
CONTROL
TO LASER BIAS
CONTROL
DECOUPLING
CAPACITOR
Tx POWER*
Tx BIAS*
*SATISFIES SFF-8472 COMPATIBILITY
V
CC
V
CC
= 3.3V
4.7k
4.7k
Tx-FAULT
LOS
2-WIRE
INTERFACE
Typical Operating Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1856B-020 | Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
| DS1856B-020R | Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
| DS1856B-020T | Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
| DS1856B-025 | Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
| DS1856B-025R | Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1856B-020 | 功能描述:數(shù)字電位計(jì) IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS1856B-020/R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
| DS1856B-020/T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection |
| DS1856B-020/T&R | 制造商:Maxim Integrated Products 功能描述:DUAL TEMP R 20K3MONBGA T&R - Tape and Reel 制造商:Rochester Electronics LLC 功能描述: |
| DS1856B-020/T&R | 功能描述:數(shù)字電位計(jì) IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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