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ADT7318ARQZ-REEL Arkusz danych(PDF) 1 Page - Analog Devices

Numer części ADT7318ARQZ-REEL
Szczegółowy opis  Accurate Digital Temperature Sensor
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ADT7318ARQZ-REEL Arkusz danych(HTML) 1 Page - Analog Devices

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±0.5°C Accurate Digital Temperature Sensor
and Quad Voltage Output 12-/10-/8-Bit DACs
ADT7316/ADT7317/ADT7318
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2003–2007 Analog Devices, Inc. All rights reserved.
FEATURES
ADT7316—four 12-bit DACs
ADT7317—four 10-bit DACs
ADT7318—four 8-bit DACs
Buffered voltage output
Guaranteed monotonic by design over all codes
10-bit temperature-to-digital converter
Temperature range: −40°C to +120°C
Temperature sensor accuracy of ±0.5°C
Supply range: 2.7 V to 5.5 V
DAC output range: 0 V to 2 VREF
Power-down current : <10 μA
Internal 2.28 VREF option
Double-buffered input logic
Buffered/unbuffered reference input option
Power-on reset to 0 V
Simultaneous update of outputs (LDAC function)
On-chip rail-to-rail output buffer amplifier
I2C®-, SMBus-, SPI®-, QSPI™-, MICROWIRE™-, and DSP-
compatible 4-wire serial interface
SMBus packet error checking (PEC) compatible
16-lead QSOP
APPLICATIONS
Portable battery-powered instruments
Personal computers
Telecommunications systems
Electronic test equipment
Domestic appliances
Process control
PIN CONFIGURATION
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VOUT-A
VREF-AB
CS
D+
VDD
GND
VOUT-B
VOUT-D
VREF-CD
SCL/SCLK
INT/INT
D–
LDAC
DOUT/ADD
SDA/DIN
VOUT-C
TOP VIEW
(Not to Scale)
ADT7316/
ADT7317/
ADT7318
Figure 1.
GENERAL DESCRIPTION
The ADT7316/ADT7317/ADT73181combine a 10-bit
temperature-to-digital converter and a quad 12-/10-/8-bit
DAC, respectively, in a 16-lead QSOP. This includes a band
gap temperature sensor and a 10-bit ADC to monitor and
digitize the temperature reading to a resolution of 0.25°C. The
ADT7316/ ADT7317/ADT7318 operate from a single 2.7 V to
5.5 V supply. The output voltage of the DAC ranges from 0 V
to 2 VREF, with an output voltage settling time of 7 μs typically.
The ADT7316/ ADT7317/ADT7318 provide two serial inter-
face options, a 4-wire serial interface that is compatible with
SPI, QSPI, MICROWIRE, and DSP interface standards, and a
2-wire SMBus/I2C interface. They feature a standby mode that
is controlled via the serial interface.
The reference for the four DACs is derived either internally
or from two reference pins (one per DAC pair). The outputs
of all DACs may be updated simultaneously using the software
LDAC function or external LDAC pin. The ADT7316/ADT7317/
ADT7318 incorporate a power-on-reset circuit that ensures the
DAC output powers up to 0 V and remains there until a valid
write takes place.
The ADT7316/ADT7317/ADT7318 wide supply voltage range,
low supply current, and SPI-/I2C-compatible interface make
them ideal for a variety of applications, including personal
computers, office equipment, and domestic appliances.
1 Protected by the following U.S. patent numbers: 5,764,174; 5,867,012;
6,097,239; 6,169,442.


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