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ADT7317 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADT7317
Beschreibung SPI/I2C Compatible/ 10-Bit Digital Temperature Sensor and Quad Voltage Output 12/10/8-Bit DAC
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 30 Seiten
ADT7317 Datasheet, Funktion
PRELIMINARY TECHNICAL DATA
= SPI/I2CCompatible, 10-Bit Digital Temperature
Sensor and Quad Voltage Output 12/10/8-Bit DAC
Preliminary Technical Data
ADT7316/7317/7318
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: -40oC to +125oC
Temperature Sensor Accuracy of ±0.5oC
Supply Range : + 2.7 V to + 5.5 V
DAC Output Range: 0 - 2VREF
Power-Down Current 1µA
Internal 2.25 VRef Option
Double-Buffered Input Logic
Buffered / Unbuffered Reference Input Option
Power-on Reset to Zero Volts
Simultaneous Update of Outputs (LDAC Function)
On-Chip Rail-to-Rail Output Buffer Amplifier
I2C, SPITM, QSPITM, MICROWIRETM and DSP-Compatible 4-
wire Serial Interface
16-Lead QSOP Package
APPLICATIONS
Portable Battery Powered Instruments
Personal Computers
Telecommunications Systems
Electronic Test Equipment
Domestic Appliances
Process Control
GENERAL DESCRIPTION
The ADT7316/7317/7318 combines a 10-Bit Tempera-
ture-to-Digital Converter and a quad 12/10/8-Bit DAC
respectively, in a 16-Lead QSOP package. This includes a
bandgap temperature sensor and a 10-bit ADC to monitor
and digitize the temperature reading to a resolution of
0.25oC. The ADT7316/17/18 operates from a single
+2.7V to +5.5V supply. The output voltage of the DAC
ranges from 0 V to 2VREF , with an output voltage settling
time of typ 7 msec. The ADT7316/17/18 provides two
serial interface options, a four-wire serial interface which
is compatible with SPITM, QSPITM, MICROWIRETM and
DSP interface standards; and a two-wire I2C interface. It
features a standby mode that is controlled via the serial
interface.
The reference for the four DACs is derived either inter-
nally 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
ADT7316/7317/7318 incorporates a power-on-reset cir-
cuit, which ensures that the DAC output powers-up to
zero volts and it remains there until a valid write takes
place.
The ADT7316/7317/7318’s wide supply voltage range,
low supply current and SPI/I2C-compatible interface,
make it ideal for a variety of applications, including per-
sonal computers, office equipment and domestic appli-
ances.
ON- CH IP
TEMPERA TURE
SEN SOR
INTERNAL TEMPERATURE
VA LUE REGISTER
D+ 7
D- 8
ANAL OG
MU X
A -TO-D
CON VERTER
VDD
VA LUE
R EGISTER
VDD
SENSOR
EXTERNA L TEMPERATURE
VALUE REGISTER
ADT7316/17/18
LIMIT
COM PAR AT OR
STA TUS
REGISTER S
ADDRESS POINTER
R EGIST ER
THIGH LIMIT
REGIST ERS
T LOW L IMIT
REGIST ER S
VDD L im it
R EGIST ERS
CONTROL CONFIG . 1
REGISTER
CONTROL CONFIG. 2
REGIST ER
CONTROL CONFIG . 3
R EGISTER
DA C CONFIGURATION
R EGIST ER
L DA C CONFIGURATION
REGISTER
INTERRUPT MASK
REGISTERS
DAC A
REGISTER S
DA C B
REG ISTERS
DAC C
REGISTER S
DAC D
R EGISTER S
STR ING
DAC A
2 VOUT-A
STR IN G
DA C B
1 VOUT-B
ST RIN G
DA C C
16 VOUT-C
STR IN G
DA C D
15 VOUT-D
GAIN POWER
SELECT DOWN
LO GIC L OGIC
10 INTERRUPT
65
VDD GND
SMB us/SPI INTERFACE
4 13 12 11
CS SCL/SCL K SDA /DIN DOUT/ADD
9
LDAC
3
VREF-A B
INTERNAL TEMP
SENSOR
14
VR EF-C D
FUNCTIONAL BLOCK DIAGRAM
REV. PrN 02/02
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
I2C is a registered trademark of Philips Corporation
* Protected by U.S. Patent No. 5,969,657; other patents pending.
SPI and QSPI are trademarks of Motorola, INC.
MICROWIRE is a trademark of National Semiconductor Corporation.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
Analog Devices, Inc., 2002






ADT7317 Datasheet, Funktion
PRELIMINARY TECHNICAL DATA
ADT7316/7317/7318
ABSOLUTE MAXIMUM RATINGS*
VDD to GND
Digital Input Voltage to GND
Digital Output Voltage to GND
Reference Input voltage to GND
Operating Temperature Range
–0.3 V to +7 V
–0.3 V to VDD + 0.3 V
–0.3 V to VDD + 0.3 V
–0.3 V to VDD + 0.3V
–40°C to +125°C
Storage Temperature Range
–65°C to +150°C
Junction Temperature
+150°C
16-Lead QSOP Package
Power Dissipation
θJA Thermal Impedance
Reflow Soldering
(Tj max - TA) / θJA
150 °C/W (QSOP)
Peak Temperature
+220 +/- 0°C
Time of Peak Temperature
10 sec to 40 sec
*Stresses above those listed under Absolute Maximum Ratings may cause permanent
damage to the device. This is a stress rating only; functional operation of the device
at these or any other conditions above those indicated in the operational section of this
specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
ADD Pin
Low
Float
High
Table 1. I2C Address Selection
I2C Address
1001 000
1001 010
1001 011
PIN CONFIGURATION
QSOP
Vo u t-B
Vo u t-A
Vr ef-A B
CS
1
2
3
4
GND 5
VDD 6
D+ 7
16 Vou t-C
15 Vou t-D
14 Vr ef-CD
A DT7316/ 13 SCL/SCLK
7317/7318
12 SDA/DIN
TO P VIEW
(Not to Scale)
11 DOUT/ADD
10 INTERRUPT
D- 8
9 LDAC
Model
ADT7318ARQ
ADT7317ARQ
ADT7316ARQ
Temperature Range
–40°C to +125°C
-40°C to +125°C
-40°C to +125°C
ORDERING GUIDE
DAC Resolution
Package Description
8-Bits
10-Bits
12-Bits
16-Lead QSOP
16-Lead QSOP
16-Lead QSOP
Package Options
RQ-16
RQ-16
RQ-16
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADT7316/7317/7318 feature proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions
are recommended to avoid performance degradation or loss of functionality.
6
WARNING!
ESD SENSITIVE DEVICE
REV. PrN

6 Page









ADT7317 pdf, datenblatt
PRELIMINARY TECHNICAL DATA
ADT7316/7317/7318
0.02
0.01
VDD = 5V
TA = 25؇C
0
-0.01
-0.02
01 2 3 4 5 6
VREF - Vol ts
TPC 19. Full-Scale Error vs. VREF
150n s/DIV
TPC 20. DAC-to-DAC Crosstalk
0
0
0
000 00 00
TITLE
TPC 21. PSRR vs Supply Ripple Frequency
2
1.5
1
5.5V
0.5
0
-30 -20 -10 0
10 20 30 40
50 60 70 80 90 100 110 120
-0.5
-1 3.3V
-1.5
-2
TEMPERATURE('C)
TPC 22. Temperature Error @ 3.3 V and 5.5 V
12
REV. PrN

12 Page





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