DS1631Z Maxim Integrated Products, DS1631Z Datasheet

IC THERMOMETER DIG HI-PREC 8SOIC

DS1631Z

Manufacturer Part Number
DS1631Z
Description
IC THERMOMETER DIG HI-PREC 8SOIC
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1631Z

Function
Thermometer, Thermostat
Topology
ADC (Sigma Delta), Comparator, Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 125°C
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
No
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Full Temp Accuracy
+/- 2 C
Digital Output - Bus Interface
Serial (2-Wire)
Digital Output - Number Of Bits
12 bit
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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FEATURES
DESCRIPTION
The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature
readings over a -55°C to +125°C range. The DS1631 and DS1631A thermometer accuracy is ±0.5°C
from 0°C to +70°C with 3.0V ≤ V
3.0V ≤ V
points (T
EEPROM so they can be programmed prior to installation. In addition, the DS1631A automatically
begins taking temperature measurements at power-up, which allows it to function as a stand-alone
thermostat. Communication with the DS1631/DS1631A/DS1731 is achieved through a 2-wire serial
interface, and three address pins allow up to eight devices to be multidropped on the same 2-wire bus.
Pin descriptions for the DS1631/DS1631A/DS1731 are provided in Table 2 and user-accessible registers
are summarized in Table 3. A functional diagram is shown in Figure 1.
www.maxim-ic.com
DS1631 and DS1631A Provide ±0.5°C
Accuracy over a 0°C to +70°C Range
DS1731 Provides ±1°C Accuracy over a
-10°C to +85°C Range
DS1631A Automatically Begins Taking
Temperature Measurements at Power-Up
Operating Temperature Range: -55°C to
+125°C (-67°F to +257°F)
Temperature Measurements Require No
External Components
Output Resolution is User-Selectable to 9,
10, 11, or 12 Bits
Wide Power-Supply Range (+2.7V to +5.5V)
Converts Temperature-to-Digital Word in
750ms (max)
Multidrop Capability Simplifies Distributed
Temperature-Sensing Applications
Thermostatic Settings are User-Definable
and Nonvolatile (NV)
Data is Read/Written Through 2-Wire Serial
Interface (SDA and SCL Pins)
All Three Devices are Available in 8-Pin
μSOP Packages and the DS1631 is Also
Available in a 150mil SO package—see
Table 1 for Ordering Information
H
DD
and T
≤ 5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip
L
). The T
H
and T
L
DD
registers and thermometer configuration settings are stored in NV
≤ 5.5V, and the DS1731 accuracy is ±1°C from -10°C to +85°C with
1 of 15
PIN CONFIGURATIONS
APPLICATIONS
Network Routers and Switches
Cellular Base Stations
Portable Products
Any Space-Constrained Thermally Sensitive
Product
See Table 2 for Pin Descriptions
GND
SDA
T
SCL
GND
Thermometer and Thermostat
(DS1631U+, DS1631AU+,
SDA
SCL
T
OUT
DS1631/DS1631A/DS1731
OUT
(DS1631Z+, DS1631S+)
SO (150mil and 208mil)
DS1731U+)
1
2
3
4
1
2
3
4
μSOP
High-Precision Digital
8
7
6
5
8
7
6
5
V
A
A
A
V
A
A
A
DD
0
2
1
DD
0
1
2
102307

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DS1631Z Summary of contents

Page 1

... Cellular Base Stations Portable Products Any Space-Constrained Thermally Sensitive Product ≤ 5.5V, and the DS1731 accuracy is ±1°C from -10°C to +85°C with DD registers and thermometer configuration settings are stored DS1631/DS1631A/DS1731 High-Precision Digital OUT μSOP DS1731U OUT (150mil and 208mil) (DS1631Z+, DS1631S+) 102307 ...

Page 2

... PACKAGE NUMBER MARKING DS1631U+ D1631 (See Note) DS1631U+T&R D1631 (See Note) DS1631Z+ DS1631Z (See Note) DS1631 in Lead-Free 150 mil 8-Pin SO DS1631Z+T&R DS1631Z (See Note) DS1631AU+ 1631A (See Note) DS1631AU+T&R 1631A (See Note) DS1631S+ DS1631S (See Note) DS1631 in Lead-Free 208 mil 8-Pin SO DS1631S+T& ...

Page 3

Figure 1. FUNCTIONAL DIAGRAM V DD SCL SDA ADDRESS AND I/O CONTROL GND ABSOLUTE MAXIMUM RATINGS* Voltage on any Pin Relative to Ground Operating Temperature Range Storage Temperature Range Solder Dip Temperature (10s) Reflow ...

Page 4

DC ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Supply Voltage V DD DS1631, DS1631A T ERR Thermometer Error DS1731 T ERR Thermometer Error Low-Level Input V IL Voltage High-Level Input V IH Voltage SDA Low-Level V OL1 Output Voltage V OL2 Input Current ...

Page 5

AC ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Temperature t TC Conversion Time SCL Frequency f SCL Bus Free Time Between a STOP and t BUF START Condition START and Repeated START Hold Time t HD:STA from Falling SCL Low Period of SCL ...

Page 6

EEPROM AC ELECTRICAL CHARACTERISTICS PARAMETER EEPROM Write Cycle Time EEPROM Writes EEPROM Data Retention Figure 2. TYPICAL OPERATING CURVES DS1631/DS1631A 0.8 0.6 0.4 0.2 +3 σ 0 Mean -0.2 -3 σ -0.4 -0.6 -0 REFERENCE ...

Page 7

Table 3. REGISTER SUMMARY REGISTER NAME SIZE (USER ACCESS) (BYTES) Temperature 2 (Read Only (Read/Write (Read/Write) Configuration (Various bits are 1 Read/Write and Read Only—See Table 5) OPERATION—MEASURING TEMPERATURE The DS1631, DS1631A, and DS1731 ...

Page 8

Bits 3 through 0 of the temperature register are hardwired to 0. When the device is configured for 12-bit resolution, the 12 MSbs (bits 15 through 4) of the temperature register contain temperature ...

Page 9

Access TL commands. When making changes to the T stopped using the Stop Convert T command if the device is in continuous conversion mode. Note that if the thermostat function is not used, the T Another thermostat feature is ...

Page 10

Table 5. CONFIGURATION REGISTER BIT DESCRIPTIONS BIT NAME (USER ACCESS) DONE—Temperature Conversion Done (Read Only) THF—Temperature High Flag (Read/Write) TLF—Temperature Low Flag (Read/Write) NVB—NV Memory Busy (Read Only) R1—Resolution Bit 1 (Read/Write) R0—Resolution Bit 0 (Read/Write) POL*—T Polarity OUT (Read/Write) ...

Page 11

SERIAL DATA BUS The DS1631, DS1631A, and DS1731 communicate over a bidirectional 2-wire serial data bus that consists of a serial clock (SCL) signal and serial data (SDA) signal. The DS1631, DS1631A, and DS1731 interface to the bus through ...

Page 12

Figure 8. START, STOP, AND ACK SIGNALS SDA SCL START Condition GENERAL 2-WIRE INFORMATION All data is transmitted MSb first over the 2-wire bus. One bit of data is transmitted on the 2-wire bus each SCL period. A pullup resistor ...

Page 13

READS The master can read data from the DS1631/DS1631A/DS1731 by issuing an Access Config, Access TH, Access TL, or Read Temperature command following the control byte (see Figures 9c and 9e). After receiving an ACK in response to the ...

Page 14

Figure 9 ( e). 2-WIRE INTERFACE TIMING THERM = DS1631, DS1631A, or DS1731 DS1631/DS1631A/DS1731 ...

Page 15

OPERATION EXAMPLE In this example, the master configures the DS1631/DS1631A/DS1731 (A conversions and thermostatic function. MASTER THERMETER* MODE MODE ...

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