MCP9800/1/2/3
2-Wire High-Accuracy Temperature Sensor
Features
• Temperature-to-Digital Converter
• Accuracy with 12-bit Resolution:
- ±0.5°C (typ.) at +25°C
- ±1°C (max.) from -10°C to +85°C
- ±2°C (max.) from -10°C to +125°C
- ±3°C (max.) from -55°C to +125°C
• User-selectable Resolution: 9 – 12 bit
• Operating Voltage Range: 2.7V to 5.5V
• 2-wire Interface: I
2
C™/SMBus Compatible
• Operating Current: 200 µA (typ.)
• Shutdown Current: 1 µA (max.)
• Power-saving One-shot Temperature
Measurement
• Available Packages: SOT-23-5, MSOP-8, SOIC-8
Description
Microchip Technology Inc.’s MCP9800/1/2/3 family of
digital temperature sensors converts temperatures
between -55°C and +125°C to a digital word. They
provide an accuracy of ±1°C (max.) from -10°C to
+85°C.
The MCP9800/1/2/3 family comes with user-program-
mable registers that provide flexibility for temperature
sensing applications. The register settings allow user-
selectable 9-bit to 12-bit temperature measurement
resolution, configuration of the power-saving Shutdown
and One-shot (single conversion on command while in
the Shutdown) modes and the specification of both
temperature alert output and hysteresis limits. When
the temperature changes beyond the specified limits,
the MCP9800/1/2/3 outputs an alert signal. The user
has the option of setting the alert output signal polarity
as an active-low or active-high comparator output for
thermostat operation, or as temperature event interrupt
output for microprocessor-based systems.
This sensor has an industry standard 2-wire, I
2
C™/
SMBus compatible serial interface, allowing up to eight
devices to be controlled in a single serial bus. These fea-
tures make the MCP9800/1/2/3 ideal for sophisticated
multi-zone temperature-monitoring applications.
Typical Applications
•
•
•
•
•
•
•
Personal Computers and Servers
Hard Disk Drives and Other PC Peripherals
Entertainment Systems
Office Equipment
Data Communication Equipment
Mobile Phones
General-purpose Temperature Monitoring
Package Types
MCP9800
MCP9802
MCP9801
MCP9803
SOIC, MSOP
5 SDA
4 SCLK
SDA 1
SCLK 2
ALERT 3
GND 4
8 V
DD
7 A0
6 A1
5 A2
Typical Application
V
DD
MCP9800/02
V
DD
1
GND 2
ALERT 3
5
4
PICmicro
®
Microcontroller
R
SDA
SCLK
R
PULL-UP
PIC16F737
I
2
C™ Port
SOT-23-5
V
DD
1
GND 2
ALERT 3
I/O Port
MCP9800/02A0:
A2, A1, A0 are internally set to (0, 0, 0)
MCP9800/02A5:
A2, A1, A0 are internally set to (1, 0, 1)
MCP9802/03:
Serial Bus time-out 35 ms (typ.)
2004 Microchip Technology Inc.
DS21909B-page 1
MCP9800/1/2/3
1.0
ELECTRICAL
CHARACTERISTICS
PIN FUNCTION TABLE
NAME
SDA
SCLK
ALERT
A2
A1
A0
V
DD
GND
FUNCTION
Bidirectional Serial Data (open-drain
output)
Serial Clock Input
Temperature Alert Output (open-drain)
Address Select Pin (bit 2)
Address Select Pin (bit 1)
Address Select Pin (bit 0)
Power Supply Input
Ground
Absolute Maximum Ratings †
V
DD
....................................................................... 6.0V
Voltage at all Input/Output pins .... GND – 0.3V to 5.5V
Storage temperature ..........................-65°C to +150°C
Ambient temp. with power applied .....-55°C to +125°C
Junction Temperature (T
J
).................................. 150°C
ESD protection on all pins (HBM:MM)....... (4 kV:400V)
Latch-Up Current at each pin ........................ ±200 mA
†Notice:
Stresses above those listed under “Maximum
ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated, V
DD
= 2.7V to 5.5V, GND = Ground, and
T
A
= -55°C to +125°C.
Parameters
Power Supply
Operating Voltage Range
Operating Current
Shutdown Current
Power On Reset Threshold (POR)
Temperature Sensor Accuracy
Accuracy with 12-bit Resolution:
T
A
= +25°C
-10°C < T
A
≤
+85°C
-10°C < T
A
≤
+125°C
-55°C < T
A
≤
+125°C
Internal
Σ∆
ADC
Conversion Time:
9-bit Resolution
10-bit Resolution
11-bit Resolution
12-bit Resolution
Alert Output (Open-drain)
High-level Current
Low-level Voltage
Thermal Response
Response Time
t
RES
—
1.4
—
s
Time to 63% (88°C)
27°C (Air) to 125°C (oil bath)
I
OH
V
OL
—
—
—
—
1
0.4
µA
V
V
OH
= 5V
I
OL
= 3 mA
t
CONV
t
CONV
t
CONV
t
CONV
—
—
—
—
30
60
120
240
75
150
300
600
ms
ms
ms
ms
33 samples/sec (typ.)
17 samples/sec (typ.)
8 samples/sec (typ.)
4 samples/sec (typ.)
T
ACY
T
ACY
T
ACY
T
ACY
—
-1.0
-2.0
-3.0
±0.5
—
—
—
—
+1.0
+2.0
+3.0
°C
°C
°C
°C
V
DD
= 3.3V
V
DD
= 3.3V
V
DD
= 3.3V
V
DD
= 3.3V
V
DD
I
DD
I
SHDN
V
POR
2.7
—
—
—
—
200
0.1
1.7
5.5
400
1
—
V
µA
µA
V
Continuous Operation
Shutdown Mode
V
DD
falling edge
Sym
Min
Typ
Max
Unit
Conditions
DS21909B-page 2
2004 Microchip Technology Inc.
MCP9800/1/2/3
DIGITAL INPUT/OUTPUT PIN CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated, V
DD
= 2.7V to 5.5V, GND = Ground and
T
A
= -55°C to +125°C.
Parameters
Input
High-level Voltage
Low-level Voltage
Input Current
Output (SDA)
Low-level Voltage
High-level Current
Low-level Current
Capacitance
SDA and SCLK Inputs
Hysteresis
V
HYST
0.05 V
DD
—
—
V
V
OL
I
OH
I
OL
C
IN
—
—
6
—
—
—
—
10
0.4
1
—
—
V
µA
mA
pF
I
OL
= 3 mA
V
OH
= 5V
V
OL
= 0.6V
V
IH
V
IL
I
IN
0.7 V
DD
—
-1
—
—
—
—
0.3 V
DD
+1
V
V
µA
Sym
Min
Typ
Max
Units
Conditions
Serial Input/Output (SCLK, SDA, A0, A1, A2)
Graphical Symbol Description
INPUT
Voltage
V
DD
Voltage
V
DD
V
IH
V
IL
time
Current
Current
I
OL
I
IN
time
I
OH
time
V
OL
time
OUTPUT
TEMPERATURE CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated, V
DD
= +2.7V to +5.5V, GND = Ground.
Parameters
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
Thermal Resistance, 5L-SOT23
Thermal Resistance, 8L-SOIC
Thermal Resistance, 8L-MSOP
Note 1:
θ
JA
θ
JA
θ
JA
—
—
—
256
163
206
—
—
—
°C/W
°C/W
°C/W
T
A
T
A
T
A
-55
-55
-65
—
—
—
+125
+125
+150
°C
°C
°C
(Note 1)
Sym
Min
Typ
Max
Units
Conditions
Operation in this range must not cause T
J
to exceed Maximum Junction Temperature (+150°C).
2004 Microchip Technology Inc.
DS21909B-page 3
MCP9800/1/2/3
SERIAL INTERFACE TIMING SPECIFICATIONS
Electrical Specifications:
Unless otherwise indicated, V
DD
= 2.7V to 5.5V, GND = Ground, -55°C < T
A
< +125°C,
C
L
= 80 pF, and all limits measured to 50% point.
Parameters
Sym
Min
Typ
Max
Units
Conditions
I
2
C
MCP9800/01
SMBus
MCP9802/03
2-Wire I
2
C/SMBus Compatible Interface
Serial Port Frequency
Clock Period
Low Clock
High Clock
Rise Time
Fall Time
Data Setup Before SCLK High
Data Hold After SCLK Low
Start Condition Setup Time
Start Condition Hold Time
Stop Condition Setup Time
Bus Idle
Time Out
f
SC
f
SC
t
SC
t
LOW
t
HIGH
t
R
t
F
t
SU-DATA
t
H-DATA
t
SU-START
t
H-START
t
SU-STOP
t
IDLE
t
OUT
0
10
2.5
1.3
0.6
20
20
0.1
0
0.6
0.6
0.6
1.3
25
—
—
—
—
—
—
—
—
—
—
—
—
—
35
400
400
—
—
—
300
300
—
0.9
—
—
—
—
50
kHz
kHz
µs
µs
µs
ns
ns
µs
µs
µs
µs
µs
µs
ms
MCP9802/03 only
10% to 90% of V
DD
(SCLK, SDA)
90% to 10% of V
DD
(SCLK, SDA)
Timing Diagram
START Condition
SCLK
t
SU-START
t
H-START
SDA
t
OUT
t
HIGH
SCLK
t
LOW
Data Transmission
SDA
t
R
,t
F
t
SU-DATA
STOP Condition
t
H-DATA
t
SC
SCLK
SDA
t
SU-STOP
t
IDLE
DS21909B-page 4
2004 Microchip Technology Inc.
MCP9800/1/2/3
2.0
TYPICAL PERFORMANCE CURVES
Note:
Unless otherwise noted: V
DD
= 2.7V to 5.5V.
3.0
Temperature Accuracy (°C)
2.0
1.0
0.0
-1.0
-2.0
Spec. Limits
12-Bit Resolution
160 Samples
V
DD
= 3.3V
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-55
-35
-15
5
25 45
T
A
(°C)
65
85
105 125
Temperature Accuracy (°C)
FIGURE 2-1:
Average Temperature
Accuracy vs. Ambient Temperature, V
DD
= 3.3V.
3.0
Temperature Accuracy (°C)
2.0
1.0
0.0
-1.0
-2.0
-3.0
-55 -35 -15
5
25 45
T
A
(°C)
65
85
105 125
V
DD
= 2.7V
V
DD
= 3.3V
V
DD
= 5.0V
V
DD
= 5.5V
12-Bit Resolution
160 Samples
FIGURE 2-4:
Temperature Accuracy
Histogram, T
A
= +25°C.
400
350
300
I
DD
(µA)
250
200
150
100
50
-55 -35 -15
5
25 45
T
A
(°C)
65
85
105 125
V
DD
= 2.7V
V
DD
= 3.3V
V
DD
= 5.0V
V
DD
= 5.5V
FIGURE 2-2:
Average Temperature
Accuracy vs. Ambient Temperature.
3.0
Temperature Accuracy (°C)
2.0
1.0
0.0
-1.0
-2.0
-3.0
-55 -35 -15
5
25 45
T
A
(°C)
65
85
105 125
9-Bit
10-Bit
11-Bit
12-Bit
FIGURE 2-5:
Temperature.
Supply Current vs. Ambient
Resolution
V
DD
= 3.3V
160 Samples
1
0.8
I
SHDN
(µA)
0.6
0.4
0.2
0
-55
-35 -15
5
25 45
T
A
(°C )
65
85
105 125
FIGURE 2-3:
Average Temperature
Accuracy vs. Ambient Temperature, V
DD
= 3.3V.
FIGURE 2-6:
Shutdown Current vs.
Ambient Temperature.
2004 Microchip Technology Inc.
DS21909B-page 5
3.0
-3.0
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
T
A
= +25°C
V
DD
= 3.3V
5 lots
32 Samples/lot
160 Samples
Occurrences
嵌入式系统
