AD7416ARMZ-REEL View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD7416ARMZ-REEL
Analog Devices
| AD7416ARMZ-REEL Datasheet PDF : 0 Pages | |||
10-Bit Digital Temperature Sensor (AD7416) and
Four Single-Channel ADCs (AD7417/AD7418)
AD7416/AD7417/AD7418
FEATURES
10-Bit ADC with 15 s and 30 s Conversion Times
Single and Four Single-Ended Analog Input Channels
On-Chip Temperature Sensor: –40؇C to +125؇C
On-Chip Track-and-Hold
Overtemperature Indicator
Automatic Power-Down at the End of a Conversion
Wide Operating Supply Range: 2.7 V to 5.5 V
I2C® Compatible Serial Interface
Selectable Serial Bus Address Allows Connection of up
to Eight AD7416/AD7417s to a Single Bus
AD7416 Is a Superior Replacement for LM75
APPLICATIONS
Data Acquisition with Ambient Temperature Monitoring
Industrial Process Control
Automotive
Battery-Charging Applications
Personal Computers
GENERAL DESCRIPTION
The AD7417 and AD7418 are 10-bit, 4-channel and single-
channel ADCs with an on-chip temperature sensor that
can operate from a single 2.7 V to 5.5 V power supply. The
devices contain a 15 µs successive approximation converter, a
5-channel multiplexer, a temperature sensor, a clock oscilla-
tor, a track-and-hold, and a reference (2.5 V). The AD7416
is a temperature-monitoring only device in an 8-lead package.
The temperature sensor on the parts can be accessed via multi-
plexer Channel 0. When Channel 0 is selected and a conversion
is initiated, the resulting ADC code at the end of the conversion
gives a measurement of the ambient temperature (±1°C @ 25°C).
On-chip registers can be programmed with high and low tem-
perature limits, and an open-drain overtemperature indicator
(OTI) output is provided, which becomes active when a pro-
grammed limit is exceeded.
A configuration register allows programming of the sense of the
OTI output (active high or active low) and its operating mode
(comparator or interrupt). A programmable fault queue counter
allows the number of out-of-limit measurements that must occur
before triggering the OTI output to be set to prevent spurious
triggering of the OTI output in noisy environments.
(continued on page 7)
REV. G
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
FUNCTIONAL BLOCK DIAGRAMS
BAND GAP
TEMPERATURE
SENSOR
10-BIT
ANALOG-DIGITAL
CONVERTER
ADDRESS
POINTER
REGISTER
A0
A1
A2
TEMPERATURE
VALUE
REGISTER
TOTI SETPOINT
REGISTER
THYST SETPOINT
REGISTER
CONFIGURATION
REGISTER
SERIAL BUS
INTERFACE
AD7416
SETPOINT
COMPARATOR
FAULT
QUEUE
COUNTER
VDD
OTI
GND
SDA
SCL
REFIN
VDD
TEMP
SENSOR
REF
2.5V
OVERTEMP REG B
A>B
A
CHARGE
DISTRIBUTION
DAC
DATA OUT
AIN1
AIN2
AIN3
AIN4
MUX
SAMPLING
CAPACITOR
CLOCK
+
CONTROL
LOGIC
I2C
INTERFACE
VBALANCE
AD7417
NC NC GND
NC = NO CONNECT
CONVST
A0 A1 A2
VDD
REFIN
TEMP
SENSOR
REF
2.5V
OVERTEMP REG B
A>B
A
CHARGE
DISTRIBUTION
DAC
DATA OUT
AIN1
MUX
SAMPLING
CAPACITOR
CLOCK
+
CONTROL
LOGIC
I2C
INTERFACE
VBALANCE
AD7418
GND
CONVST
OTI
SCL
SDA
OTI
SCL
SDA
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2004 Analog Devices, Inc. All rights reserved.
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