The ADT6401/ADT6402 are trip point temperature switches available in a 6-lead SOT-23 package. Each part contains an internal band gap temperature sensor for local temperature sensing. When the temperature crosses the trip point setting, the logic output is activated. The ADT6401 logic output is active low and open-drain. The ADT6402 logic output is active high and push-pull. The temperature is digitized to a resolution of 0.125°C (11-bit). The pin-selectable trip point settings are 10°C apart starting from −45°C to +5°C for undertemperature switching, and from 45°C to 115°C for overtemperature switching.

These devices typically consume 30 μA of supply current. Hysteresis is pin selectable at 2°C and 10°C. The temperature switch is specified to operate over the supply range of 2.7 V to 5.5 V.

When the ADT6401/ADT6402 are used for monitoring tempera- tures from 45°C to 115°C, the logic output pin becomes active when the temperature goes higher than the selected trip point temperature. When the ADT6401/ADT6402 are used for monitoring tempera- tures from −45°C to +5°C, the logic output pin becomes active when the temperature goes lower than the selected trip point temperature.

Product Highlights

1. Σ-Δ based temperature measurement gives high accuracy and noise immunity.
2. Wide operating temperature range from −55°C to +125°C.
3. ±0.5°C typical accuracy from −45°C to +115°C.
4. Pin-selectable threshold settings from −45°C to +115°C in 10°C increments.
5. Supply voltage is 2.7 V to 5.5 V.
6. Supply current of 30 μA.
7. Space-saving, 6-lead SOT-23 package.
8. Pin-selectable temperature hysteresis of 2°C or 10°C.
9. Temperature resolution of 0.125°C.

Applications

Medical equipment

Automotive Cell phones Hard disk drives

Personal computers

Electronic test equipment

Domestic appliances

Process control

Data Sheet, Rev. 0, 5/08

Part#	Temp Res(°C/LSB)	25°C Temp Error (Deg C)	Resolution (Bits)	# Chan	DAC Outputs	Interface	Temp Range(s)	Supply Voltage Range	Product Description	Price* (1000-4999)
ADT7316	0.25	±0.5	10	3	12-Bit x 4	I2C, I2C/SPI, Serial, SM Bus, SPI	-40 to +120	+2.7V to +5.5V	SPI/I2C® Compatible,10-Bit Digital Temperature Sensor With Quad Voltage-Output 12-Bit DAC	$6.46
ADT7317	0.25	±0.5	10	3	10-Bit x 4	I2C, I2C/SPI, SM Bus, SPI	-40 to +120	+2.7V to +5.5V	SPI/I2C® Compatible,10-Bit Digital Temperature Sensor w/ Quad 10-Bit Voltage Output DAC	$3.51
ADT7318	0.25	+0.5	10	3	8-Bit x 4	I2C, I2C/SPI, Serial, SM Bus, SPI	-40 to +120	+2.7V to +5.5V	SPI/I2C® Compatible,10-Bit Digital Temperature Sensor & Quad Voltage Output 8-Bit DAC	$2.23
TMP03	0.3	±3	16	0	---	PWM	-40 to +100	+4.5V to +7V	Serial PWM-Output Temperature Sensor w/ Open-Collector Output	$3.27
TMP04	0.3	±3	16	0	---	PWM	-40 to +100	+4.5V to +7V	Serial PWM-Output Temperature Sensor w/ CMOS/TTL Output	$3.27
AD7814	0.25	n/a	10	0	---	Serial, SPI	-55 to +125	+2.7V to +5.5V	10-Bit Digital Temperature Sensor in 6-Lead SOT-23	$1.00
AD7414	0.25	n/a	10	0	---	I2C, Serial	-40 to +125	+2.7V to +5.5V	SMBus/I2C, 10-Bit Digital Temperature Sensor in 6-Pin SOT w/ SMBus Alert and Over-Temperature Pin	$1.04
AD7415	0.25	±2	10	0	---	I2C, Serial	-40 to +125	+2.7V to +5.5V	SMBus/I2C, 10-Bit Digital Temperature Sensor in 5-Pin SOT	$1.04
AD7416	0.25	n/a	10	0	---	I2C, Serial	-40 to +125	+2.7V to +5.5V	10-Bit Temperature-to-Digital Converter, -40°C to +125°C, ±2°C Accuracy	$1.00
AD7314	0.25	±1	10	0	---	Serial, SPI	-35 to +85	+2.65V to +5.5V	Low Voltage, 10-Bit Digital Temperature Sensor in 8-Lead µSOP	$0.66
AD7818	0.25	±1	10	1	---	Serial, SPI	-40 to +85	+2.7V to +5.5V	9 µs, 10-Bit ADC w/ On-Chip Temperature Sensor & Over-Temperature Output	$2.34
AD7418	0.25	±1	10	2	---	I2C, Serial	-40 to +125	+2.7V to +5.5V	10-Bit ADC, Programmable Hi-Low Temp Limits w/ Over-Temp Alert, , Auto Pwr Dwn @ EOC	$2.34
AD7817	0.25	±1	10	4	---	Serial, SPI	-40 to +85	+2.7V to +5.5V	4-Channel, 9 µs, 10-Bit ADC with On-Chip Temperature Sensor & Over-Temperature Flag	$3.29
AD7417	0.25	±1	10	5	---	I2C, Serial	-40 to +125	+2.7V to +5.5V	4-Channel, 10-Bit ADC w/ on-Chip Temperature Sensor, Programmable Setpoints, and Overtemp Flag Out	$2.99
ADT7516	0.25	n/a	10	7	12-Bit x 4	I2C/SPI, Serial, SPI	-40 to +120	+2.7V to +5.5V	SPI/I2C Compatible Temperature Sensor w/10-Bit-4-Ch ADC & Quad 12-Bit Voltage DAC Control Outputs	$7.74
ADT7411	0.25	+0.5	10	10	n/a	I2C, I2C/SPI, Serial, SPI	-40 to +120	+2.7V to +5.5V	SPI®-/I2C®-Compatible, 10-Bit ADC w/ Local & Remote Temp Msmt, 8 GP Analog Inputs, and VDD monitor	$2.22
ADT6501	0.125	±4	11	n/a	-	Switch (Off/On)	-55 to +125	+2.7V to +5.5V	2.7V/5.5V, Micropower Temperature Switch in SOT-23 w/ active-low open-drain Output, +35 to +115 DegC	$0.49
ADT6502	0.125	±4	11	n/a	---	Switch (Off/On)	-55 to +125	+2.7V to +5.5V	2.7V/5.5 V, Micropower Temperature Switch in SOT-23 w/Active-High Push-pull Output, +35 to +115 DegC	-
ADT6503	0.0625	n/a	11	n/a	---	Switch (Off/On)	-55 to +125	+2.7V to +5.5V	2.7V/5.5V, Micropower Temperature Switch in SOT-23 w/Open-drain Output, -45 to +15 Deg C	$0.50
ADT6504	0.0625	n/a	12	n/a	---	Switch (Off/On)	-55 to +125	+2.7V to +5.5V	2.7 V to 5.5 V, Micropower Temperature Switch in SOT-23 w/Push-pull Output, -45 to +15 Deg C	$0.50
ADT7408	0.0625	±1	12	0	---	I2C, SM Bus	-20 to +125	+3V to +3.6V	± 2 Degree C Accurate, 12-Bit Digital Temperature Sensor	$0.87
ADT75	0.0625	n/a	12	0	---	I2C, Serial, SM Bus	-55 to +125	+3V to +5.5V	±1 Deg C Accuracy, 12-Bit Digital Temperature Sensor	$0.66
ADT7301	0.03125	n/a	13	0	---	Serial, SPI	-40 to +150	+2.7V to +5.5V	13-Bit, ±1ºC Accurate, MicroPower Digital Temperature Sensor in 6-Lead SOT-23 and 8-Lead MSOP	$1.21
ADT7302	0.03125	n/a	13	0	---	Serial, SPI	-40 to +125	+2.7V to +5.25V	±2°C Accurate, MicroPower Digital Temperature Sensor in 6-Lead SOT-23	$0.63
TMP06	0.025	±0.5	12	0	---	PWM	-40 to +150	+2.7V to +5.5V	0.5°C Accurate PWM Temperature Sensor in 5-Lead SC-70 or SOT-23 w/ Open Drain Output	$0.66
TMP01	n/a	±0.5	n/a	0	---	Analog, Switch (Off/On)	-55 to +125	+4.5V to +13.2V	Low Power, Programmable Temperature Sensor/ Controller w/ upper/lower setpoints	$2.67
TMP05	0.025	±0.5	12	0	---	PWM	-40 to +150	+2.7V to +5.5V	0.5°C Accurate PWM Temperature Sensor in 5-Lead SC-70 or SOT-23 w/ CMOS/TTL Output	$0.66
AD22105	n/a	±3	n/a	0	---	Switch (Off/On)	-40 to +125	+2.7V to 7V	Low Voltage, Resistor Programmable Thermostatic Switch	$1.21

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

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