S-5851A Series
2-WIRE DIGITAL TEMPERATURE SENSOR
www.sii-ic.com
© SII Semiconductor Corporation, 2009-2015
Rev.2.2
_01
S-5851A Series is a 2-wire serial I/O digital temperature sensor. This IC measures temperature with resolution of 0.0625°C
without external parts. This IC is ideal for wide-ranging temperature measurement for various applications.
A temperature sensor, a reference voltage generation circuit, a
ΔΣ
type A/D converter and interface bus are integrated in a
chip, and packages SNT-6A and SOT-23-6 available for this IC.
Features
•
Low voltage operation
•
Low current consumption
•
High accuracy
•
Temperature resolution
•
Digital output
•
Maximum operating frequency
•
Low power supply voltage detection circuit
•
Lead-free, Sn 100%, halogen-free
*1
*1.
Refer to “
Product Name Structure”
for details.
: V
DD
(min.) = 2.7 V
: 45
μA
typ. (+25°C)
1
μA
typ. (+25°C at shutdown)
:
±2.0°C
(max.)
−25°C
to
+85°C
±3.0°C
(max.)
−40°C
to
+125°C
: 0.0625°C
: 2-wire serial interface
: 400 kHz
Applications
•
Temperature monitor for power supply
•
Temperature monitor for battery
•
Air conditioning system
•
Various electronics devices
Packages
•
SNT-6A
•
SOT-23-6
1
2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
Block Diagram
Rev. 2.2
_01
SCL
Temp
Sensor
Control
Logic
SDA
VSS
ΔΣA/D
Converter
Serial
Interface
AD0
AD1
Oscillator
Register
VDD
Figure 1
2
Rev. 2.2
_01
Product Name Structure
1. Product name
(1) SNT-6A
S-5851AAA
-
I6T1
U
2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
Environmental code
U : Lead-free (Sn 100%), halogen-free
Package name (abbreviated) and IC packing specification
I6T1 : SNT-6A, Tape
Product name
*1
*1.
Refer to the tape drawing.
(2) SOT-23-6
S-5851AAA
-
M6T1
x
Environmental code
U : Lead-free (Sn 100%), halogen-free
S : Lead-free, halogen-free
Package name (abbreviated) and IC packing specification
M6T1 : SOT-23-6, Tape
Product name
*1
*1.
Refer to the tape drawing.
2. Package
Package Name
SNT-6A
SOT-23-6
Drawing Code
Package
PG006-A-P-SD
MP006-A-P-SD
Tape
PG006-A-C-SD
MP006-A-C-SD
Reel
PG006-A-R-SD
MP006-A-R-SD
Land
PG006-A-L-SD
⎯
3. Product name list
Table 1
Product name
S-5851AAA-I6T1U
Package
SNT-6A
S-5851AAA-M6T1y
SOT-23-6
Remark 1
y: S or U
2.
Please select products of environmental code = U for Sn 100%, halogen-free products.
3
2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
Pin Configuration
SNT-6A
Top view
1
2
3
6
5
4
Rev. 2.2
_01
Table 2
Pin No.
1
2
3
4
5
6
Symbol
Description
Figure 2
AD1
Address input
VSS
GND
SCL
Input for serial clock
SDA
I/O for serial data
AD0
Address input
VDD
Power supply
Remark
See Dimensions for details of the package drawings.
Table 3
Pin No.
1
2
3
4
5
6
Symbol
SCL
VSS
AD1
VDD
AD0
SDA
Description
Input for serial clock
GND
Address input
Power supply
Address input
I/O for serial data
SOT-23-6
Top view
6
5
4
1
2
3
Remark
See Dimensions for details of the package drawings.
Figure 3
4
Rev. 2.2
_01
Pin Functions
1. AD0, AD1 pins (Address input)
2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
To set the slave address, connect the AD0 and AD1 pins to V
SS
/ V
DD
or set them open. When connecting them to V
SS
/ V
DD
, set the value for a resistor at 500
Ω
or less. When setting them open, avoid to apply noise. The value for
capacitor is 100 pF or less for the AD0 and AD1 pins.
Users are able to set 8 types of slave address by using the combination of the AD0 and AD1 pins.
The S-5851A Series verifies if the slave address set by user matches with the slave address transmitted from the
master device or not, so that one S-5851A Series is selected from the devices connected onto the bus.
2. SDA pin (I/O for serial data)
The SDA pin transmits serial data bi-directionally, is comprised of a signal input pin and a pin with Nch open drain
output. In use, generally, connect the SDA line to any other device which has the open-drain or open-collector output
with Wired-OR connection by pulling up to V
DD
by a resistor.
Figure 4
shows the relation with an output load.
20
Maximum value of pull-up resistor (kΩ)
18
16
14
12
10
8
6
4
2
0
10
100
f
SCL
=400 kHz
Value of load capacity (pF)
Figure 4 Output Load
3. SCL pin (Input for serial clock)
The SCL pin is an input pin for serial clock, processes a signal at a rising / falling edge of SCL clock. Pay attention fully
to the rising / falling time and comply with specifications.
5
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