TSYS01
Digital Temperature Sensor
•
•
•
•
•
High Accuracy Temperature Sensor
16/24 bit Resolution
Low Power
2
SPI/I C Interface
QFN16 Package
DESCRIPTION
The TSYS01 is a single chip, versatile, new technology temperature sensor. The TSYS01
provides factory calibrated temperature information. It includes a temperature sensing chip
and a 24 bit
-ADC. The essence of the digital 24 bit temperature value and the internal
factory set calibration values lead to highly accurate temperature information accompanied
by high measurement resolution.
2
The TSYS01 can be interfaced to any microcontroller by an I C or SPI interface. This
microcontroller has to calculate the temperature result based on the ADC values and the
calibration parameters.
The basic working principle is:
•
•
•
Converting temperature into digital 16/24 bit ADC value
Providing calibration coefficients
Providing ADC value and calibration coefficients by SPI or I C interface.
2
FEATURES
High Accuracy ±0.1°C @ Temp.: -5° … +50°
C
C
Adjustment of high accuracy temp. range on request
Low Current, <12.5 A (standby < 0.14 A)
2
SPI / I C Interface
Small Package: QFN16
Operating Temperature Range: -40° … +125°
C
C
TSYS01 Rev E0.3
¢
Σ
APPLICATIONS
Industrial Control
Replacement of Thermistors and NTCs
Heating / Cooling Systems
HVACR
¢
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1/10
2012-01-13
TSYS01
Digital Temperature Sensor
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are limiting values of permitted operation and should never be
exceeded under the worst possible conditions either initially or consequently. If exceeded by
even the smallest amount, instantaneous catastrophic failure can occur. And even if the
device continues to operate satisfactorily, its life may be considerably shortened.
Parameter
Supply Voltage
Operating Temperature
Storage temperature
ESD rating
Humidity
Symbol
V
DD
T
op
T
stor
ESD
Hum
Human Body Model (HBM)
pin to pin including VDD and
GND
Conditions
Min
-0.3
-40
-55
-4
Typ
Max
+3.6
+125
+150
+4
Unit
V
°
C
°
C
kV
Non condensing
OPERATING CONDITIONS
Parameter
Operating Supply Voltage
High Accuracy Supply Voltage
Supply Current
Standby current
Peak Supply Current
Conversion time
Serial Data Clock SPI
2
Serial Data Clock I C
VDD Capacitor
Symbol
V
DD
V
DD
I
DD
IS
I
DD
T
CONV
F
SCLK
F
SCL
Place close to the chip
Conditions
stabilized
To achieve Acc1
1 sample per second
No conversion, VDD = 3V
T = 25°
C
T = 85°
C
During conversion
Min
2.2
3.2
Typ
Max
3.6
3.4
12.5
0.02
0.70
1.4
8.22
0.14
1.40
Unit
V
V
µA
µA
µA
mA
ms
MHz
kHz
7.40
9.04
20
400
100nF
OPERATIONAL CHARACTERISTICS
If not otherwise noted, 3.3V supply voltage is applied.
Parameter
Temperature Measurement
Range
Accuracy 1
Accuracy 2
PSSR
Temperature Resolution
Time Constant
Self Heating
T
RES
T
SH
1
t10-90
T
1
=25° T
2
=75°
C
C
2
PCB 900mm x 1.5mm FR4
10 samples/s, 60s, still air
9
0.02
Symbol
T
RANG
T
ACC1
T
ACC2
-5° < T < +50°
C
C
V
DD
= 3.2V – 3.4V
-40° < T < +125°
C
C
V
DD
= 3.2V – 3.4V
V
DD
= 2.7 – 3.6
T = 25° C = 100nF
C,
Conditions
Min
-40
-0.1
-0.5
Typ
Max
125
+0.1
+0.5
0.2
0.01
Unit
°
C
°
C
°
C
°
C
°
C
s
°
C
TSYS01 Rev E0.3
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2/10
2012-01-13
TSYS01
Digital Temperature Sensor
ANALOGUE TO DIGITAL CONVERTER
Parameter
Output Word
Conversion Time
Symbol
t
c
Conditions
Min
7.40
Typ
24
8.22
Max
9.04
Unit
bit
ms
DIGITAL INPUTS (SCLK, SDI, CSB, PS)
Parameter
Input High Voltage
Input Low Voltage
CS low to first SCLK rising
CS high to first SCLK rising
SDI setup to first SCLK rising
SDI hold to first SCLK rising
Symbol
V
IH
V
IL
t
CSL
t
CSH
T
DSO
T
DO
Conditions
VDD = 2.2…3.6V
VDD = 2.2…3.6V
Min
0.7 V
DD
0.0 V
DD
21
21
6
6
Typ
Max
V
DD
0.3 V
DD
Unit
V
V
ns
ns
ns
ns
DIGITAL OUTPUTS (SDA, SDO)
Parameter
Output High Voltage
Output Low Voltage
SDO setup to first SCLK rising
SDO hold to first SCLK rising
Symbol
V
OH
V
OL
t
QS
t
QH
Conditions
I
Source
= 1mA
I
Sink
= 1mA
Min
0.8 V
DD
0.0 V
DD
10
0
Typ
Max
V
DD
0.2 V
DD
Unit
V
V
ns
ns
TSYS01 Rev E0.3
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3/10
2012-01-13
TSYS01
Digital Temperature Sensor
CONNECTION DIAGRAM
PIN FUNCTION TABLE
Pin
1
2
3
4
5
6–9
10
Name
VSS
CSB
SCLK/SCL
SDI/SDA
SDO
NC
INT / EXT
Type
G
DI
DI
DIO
DO
---
DI/AI
Function
Ground
SPI: Chip Select (active low)
2
I C: Address Selection
SPI: Serial Data Clock
I
2
C: Serial Data Clock
SPI: Serial Data Input
I
2
C: Data Input / Output
SPI: Serial Data Output
Not connected / Do not connect
Internal / External Sensor Selection
Internal Sensor: Connect Pin10 with Pin11
External Sensor: Connect external Sensor
Internal / External Sensor Selection
Internal Sensor: Connect Pin11 with Pin10
External Sensor: Leave Unconnected
Internal / External Sensor Selection
Internal Sensor: Leave Unconnected
External Sensor: Connect external Sensor
Not connected / Do not connect
Supply Voltage
2
Communication protocol select (0=SPI, 1=I C)
11
INT
DI/AI
12
13 – 14
15
16
EXT
NC
VDD
PS
DI/AI
---
P
DI
TSYS01 Rev E0.3
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4/10
2012-01-13
TSYS01
Digital Temperature Sensor
INTERFACE DESCRIPTION
PROTOCOL SELECTION
PS pin input level has to be defined in dependence to protocol selection.
•
PS = 0 activates SPI.
•
PS = 1 activates I C.
2
I C INTERFACE
A I C communication message starts with a start condition and it is ended by a stop condition.
Each command consists of two bytes: the address byte and command byte.
I C ADDRESS SELECTION
The I C address can be selected by CSB pin.
•
CSB=1 then the address is 1110110x.
•
CSB=0 the address is 1110111x.
2
Therefore, two TSYS01 can be interfaced on the same I C bus.
SPI INTERFACE
The serial interface is a 4-wire SPI bus, operating as a slave. CS (chip select), SCLK (serial clock), SDI
(serial data in), and SDO (serial data out) are used to interact with the SPI master.
Communication with the chip starts when CS is pulled to low and ends when CS is pulled to high.
SCLK is controlled by the SPI master and idles low (SCLK low on CS transitions, mode 0).
A mode where the clock alternatively idles high is also supported (mode 3).
COMMANDS
The commands are the same for SPI and I C interface.
There are four commands:
•
Reset
•
Read PROM (calibration parameters)
•
Start ADC Temperature conversion
•
Read ADC Temperature result
Command
Reset
Start ADC Temperature Conversion
Read ADC Temperature Result
PROM Read Address 0
PROM Read Address 1
PROM Read Address 2
PROM Read Address 3
PROM Read Address 4
PROM Read Address 5
PROM Read Address 6
PROM Read Address 7
Hex Value
0x1E
0x48
0x00
0xA0
0xA2
0xA4
0xA6
0xA8
0xAA
0xAC
0xAE
2
2
2
2
2
TSYS01 Rev E0.3
www.meas-spec.com
5/10
2012-01-13
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