Document
MCP9700/9700A MCP9701/9701A
Low-Power Linear Active Thermistor ICs
Features
General Description
• Tiny Analog Temperature Sensor • Available Packages:
- SC70-5, SOT-23-3, TO-92-3 • Wide Temperature Measurement Range:
- -40°C to +125°C (Extended Temperature) - -40°C to +150°C (High Temperature)
(MCP9700, SOT-23-3 and SC70-5 only) • Accuracy:
- ±2°C (max.), 0°C to +70°C (MCP9700A/9701A) - ±4°C (max.), 0°C to +70°C (MCP9700/9701) • Optimized for Analog-to-Digital Converters (ADCs): - 10.0 mV/°C (typical) (MCP9700/9700A) - 19.5 mV/°C (typical) (MCP9701/9701A) • Wide Operating Voltage Range: - VDD = 2.3V to 5.5V (MCP9700/9700A) - VDD = 3.1V to 5.5V (MCP9701/9701A) • Low Operating Current: 6 µA (typical) • Optimized to Drive Large Capacitive Loads
Typical Applications
• Hard Disk Drives and Other PC Peripherals • Entertainment Systems • Home Appliance • Office Equipment • Battery Packs and Portable Equipment • General Purpose Temperature Monitoring
Package Types
MCP9700/9700A and MCP9701/9701A sensors with Linear Active Thermistor Integrated Circuit (IC) comprise a family of analog temperature sensors that convert temperature to analog voltage.
The low-cost, low-power sensors feature an accuracy of ±2°C from 0°C to +70°C (MCP9700A/9701A) and ±4°C from 0°C to +70°C (MCP9700/9701) while consuming 6 µA (typical) of operating current.
Unlike resistive sensors, e.g., thermistors, the Linear Active Thermistor IC does not require an additional signal-conditioning circuit. Therefore, the biasing circuit development overhead for thermistor solutions can be avoided by implementing a sensor from these low-cost devices. The Voltage Output pin (VOUT) can be directly connected to the ADC input of a microcontroller. The MCP9700/9700A and MCP9701/9701A temperature coefficients are scaled to provide a 1°C/bit resolution for an 8-bit ADC with a reference voltage of 2.5V and 5V, respectively. The MCP9700/9700A output 0.1°C/bit for a 12-bit ADC with 4.096V reference.
The MCP9700/9700A and MCP9701/9701A provide a low-cost solution for applications that require measurement of a relative change of temperature. When measuring relative change in temperature from +25°C, an accuracy of ±1°C (typical) can be realized from 0°C to +70°C. This accuracy can also be achieved by applying system calibration at +25°C.
In addition, this family of devices is immune to the effects of parasitic capacitance and can drive large capacitive loads. This provides printed circuit board (PCB) layout design flexibility by enabling the device to be remotely located from the microcontroller. Adding some capacitance at the output also helps the output transient response by reducing overshoots or undershoots. However, capacitive load is not required for the stability of sensor output.
3-Pin TO-92 MCP9700/9700A MCP9701/9701A
3-Pin SOT-23
MCP9700/9700A MCP9701/9701A
5-Pin SC70
MCP9700/9700A MCP9701/9701A
123
GND 3
NC 1 GND 2
5 NC
Bottom View
1 VDD VOUT GND
1 VDD
2 VOUT
VOUT 3
4 VDD
2005-2016 Microchip Technology Inc.
DS20001942G-page 1
MCP9700/9700A and MCP9701/9701A
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
VDD....................................................................... 6.0V Storage Temperature......................... -65°C to +150°C Ambient Temp. with Power Applied... -40°C to +150°C Output Current .................................................±30 mA Junction Temperature (TJ).................................. 150°C ESD Protection on All Pins (HBM:MM) ..... (4 kV:200V) 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 ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated:
MCP9700/9700A: VDD = 2.3V to 5.5V, GND = Ground, TA = -40°C to +125°C and No load MCP9701/9701A: VDD = 3.1V to 5.5V, GND = Ground, TA = -10°C to +125°C and No load
Parameter
Sym.
Min.
Typ. Max. Unit
Conditions
Power Supply
Operating Voltage Range
VDD
2.3
—
5.5
V MCP9700/9700A
VDD
3.1
—
5.5
V MCP9701/9701A
Operating Current
IDD
—
6
12
µA
IDD
—
—
15
µA TA = 150°C (Note 1)
Line Regulation
°C/VDD
—
0.1
—
°C/V
Sensor Accuracy (Notes 2, 3)
TA = +25°C TA = 0°C to +70°C TA = -40°C to +125°C TA = -10°C to +125°C TA = 0°C to +70°C TA = -40°C to +125°C TA = -10°C to +125°C TA = -40°C to +150°C Sensor Output
TACY
—
±1
—
°C
TACY
-2.0
±1
+2.0
°C MCP9700A/9701A
TACY
-2.0
±1
+4.0
°C MCP9700A
TACY
-2.0
±1
+4.0
°C MCP9701A
TACY
-4.0
±2
+4.0
°C MCP9700.