REV. C
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AD7414/AD7415
H115500.5H11543C Accurate, 10-Bit Digital
Temperature Sensors in SOT-23
FEATURES
10-Bit Temperature-to-Digital Converter
Temperature Range: –40H11543C to +125H11543C
Typical Accuracy of H115500.5H11543C at +40H11543C
SMBus/I
2
C
®
Compatible Serial Interface
3 H9262A Power-Down Current
Temperature Conversion Time: 29 H9262s Typ
Space-Saving 6-Lead (AD7414) and 5-Lead (AD7415)
SOT-23 Packages
Pin Selectable Addressing via AS
Overtemperature Indicator (AD7414 Only)
SMBus Alert Function (AD7414 Only)
4 Versions Allow 8 I
2
C Addresses (AD7414)
2 Versions Allow 6 I
2
C Addresses (AD7415)
APPLICATIONS
Hard Disk Drives
Personal Computers
Electronic Test Equipment
Office Equipment
Domestic Appliances
Process Control
Cellular Phones
FUNCTIONAL BLOCK DIAGRAM
SDA
SCL
V
DD
SMBus/I
2
C
INTERFACE
10-BIT
ANALOG-DIGITAL
CONVERTER
BAND GAP
TEMPERATURE
SENSOR
CONFIGURATION
REGISTER
TEMPERATURE
VALUE
REGISTER
AD7415
AS
GND
SMBus/I
2
C
INTERFACEAS
GND
SDA
SCL
CONFIGURATION
REGISTER
T
HIGH
SETPOINT
REGISTER
T
LOW
SETPOINT
REGISTER
SETPOINT
COMPARATOR
ALERT
TEMPERATURE
VALUE
REGISTER
10-BIT
ANALOG-DIGITAL
CONVERTER
BAND GAP
TEMPERATURE
SENSOR
V
DD
AD7414
GENERAL DESCRIPTION
The AD7414/AD7415 is a complete temperature monitoring
system in 6-lead and 5-lead SOT-23 packages. It contains a
band gap temperature sensor and 10-bit ADC to monitor and
digitize the temperature reading to a resolution of 0.25°C.
The AD7414/AD7415 provides a 2-wire serial interface that is
compatible with SMBus and I
2
C interfaces. The part comes in
four versions, the AD7414/AD7415-0, AD7414/AD7415-1,
AD7414-2, and AD7414-3. The AD7414/AD7415-0 and
AD7414/AD7415-1 versions provide a choice of three different
SMBus addresses for each version. All four AD7414 versions
give the possibility of eight different I
2
C addresses while the two
AD7415 versions allow up to six I
2
C addresses to be used.
The AD7414/AD7415’s 2.7 V supply voltage, low supply
current, serial interface, and small package size make it ideal for
a variety of applications, including personal computers, office
equipment, cellular phones, and domestic appliances.
In the AD7414, on-chip registers can be programmed with high
and low temperature limits, and an open-drain overtemperature
indicator output (ALERT) that becomes active when a programmed
limit is exceeded. A configuration register allows programming
of the state of the ALERT output (active high or active low).
This output can be used as an interrupt or as an SMBus alert.
Purchase of licensed I
2
C components of Analog Devices or one of its sublicensed
Associated Companies conveys a license for the purchaser under the Philips I
2
C
Patent Rights to use these components in an I
2
C system, provided that the system
conforms to the I
2
C Standard Specification as defined by Philips.
PRODUCT HIGHLIGHTS
1. The AD7414/AD7415 has an on-chip temperature sensor that
allows an accurate measurement of the ambient temperature
to be made. It is capable of ±0.5°C temperature accuracy.
2. SMBus/I
2
C compatible serial interface with pin selectable
choice of three addresses per version of the AD7414/AD7415,
and eight address options in total for the AD7414 and six in
total for the AD7415.
3. Supply voltage of 2.7 V to 5.5 V.
4. Space-saving 5-lead and 6-lead SOT-23 packages.
5. 10-bit temperature reading to 0.25°C resolution.
6. The AD7414 has an overtemperature indicator that can be
software disabled. Used as an interrupt of SMBus alert.
7. One-shot and automatic temperature conversion rates.