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AD7391 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 AD7391은 전자 산업 및 응용 분야에서
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부품번호 AD7391 기능
기능 +3 Volt Serial-Input Micropower 10-Bit & 12-Bit DACs
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AD7391 데이터시트, 핀배열, 회로
a
+3 Volt Serial-Input
Micropower 10-Bit & 12-Bit DACs
AD7390/AD7391
FEATURES
Micropower—100 A
Single-Supply—؉2.7 to ؉5.5 V Operation
Compact 1.75 mm Height SO-8 Package
& 1.1 mm Height TSSOP-8
AD7390—12-Bit Resolution
AD7391—10-Bit Resolution
SPI & QSPI Serial Interface Compatible with Schmitt
Trigger Inputs
APPLICATIONS
Automotive 0.5 V to 4.5 V Output Span Voltage
Portable Communications
Digitally Controlled Calibration
GENERAL DESCRIPTION
The AD7390/AD7391 family of 10-bit & 12-bit voltage-output
digital-to-analog converters is designed to operate from a single
ϩ3 V supply. Built using a CBCMOS process, these monolithic
DACs offer the user low cost, and ease-of-use in single-supply
ϩ3 V systems. Operation is guaranteed over the supply voltage
range of ϩ2.7 V to ϩ5.5 V consuming less than 100 µA making
this device ideal for battery operated applications.
The full-scale voltage output is determined by the external ref-
erence input voltage applied. The rail-to-rail REFIN to DACOUT
allows for a full-scale voltage set equal to the positive supply
VDD or any value in between.
FUNCTIONAL DIAGRAM
REF
CLR
LD
CLK
SDI
AD7390
12-BIT DAC
12
DAC REGISTER
EN 12
SERIAL REGISTER
VDD
VOUT
GND
A doubled-buffered serial-data interface offers high speed,
three-wire, SPI and microcontroller compatible inputs using
data in (SDI), clock (CLK) and load strobe (LD) pins. Addi-
tionally, a CLR input sets the output to zero scale at power on
or upon user demand.
Both parts are offered in the same pinout to allow users to select
the amount of resolution appropriate for their application with-
out circuit card redesign.
The AD7390/AD7391 are specified over the extended industrial
(Ϫ40°C to ϩ85°C) temperature range. The AD7391AR is
specified for the Ϫ40°C to ϩ125°C automotive temperature
range. The AD7390/AD7391s are available in plastic DIP, and
low profile 1.75 mm height SO-8 surface mount packages. The
AD7391ARU is available for ultracompact applications in a thin
1.1 mm TSSOP-8 package.
1.00
AD7390
0.75
VDD = +3.0V
0.50
0.25
0.00
0.25
0.50
0.75
TA = 55 C, 25 C, 85 C
SUPERIMPOSED
1.00
0
512 1024 1536 2048 2560 3072 3584 4096
CODE – Decimal
2.0
AD7390
1.5
1.0
25؇, 85؇C
VDD = +3.0V
VREF = +2.5V
0.5
0.0
؊0.5
؊1.0
؊55؇
؊1.5
؊2.0
0
512 1024 1536 2048 2560 3072 2584 4096
CODE – Decimal
Figure 1. Differential Nonlinearity Error vs. Code
REV. 0
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.
Figure 2. INL Error vs. Code & Temperature
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703




AD7391 pdf, 반도체, 판매, 대치품
AD7390/AD7391
ABSOLUTE MAXIMUM RATINGS*
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . Ϫ0.3 V, ϩ8 V
VREF to GND . . . . . . . . . . . . . . . . . . . . . . . 0.3 V, VDD ϩ 0.3 V
Logic Inputs to GND . . . . . . . . . . . . . . . . . . . . . Ϫ0.3 V, ϩ8 V
VOUT to GND . . . . . . . . . . . . . . . . . . . . . Ϫ0.3 V, VDD ϩ 0.3 V
IOUT Short Circuit to GND . . . . . . . . . . . . . . . . . . . . . . 50 mA
Package Power Dissipation . . . . . . . . . . . . . . (TJ MAX Ϫ TA)/θJA
Thermal Resistance θJA
8-Pin Plastic DIP Package (N-8) . . . . . . . . . . . . . . 103°C/W
8-Lead SOIC Package (SO-8) . . . . . . . . . . . . . . . . 158°C/W
TSSOP-8 Package (RU-8) . . . . . . . . . . . . . . . . . . . 240°C/W
Maximum Junction Temperature (TJ MAX) . . . . . . . . . . 150°C
Operating Temperature Range . . . . . . . . . . . Ϫ40°C to ϩ 85°C
Storage Temperature Range . . . . . . . . . . . . Ϫ65°C to ϩ150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . ϩ300°C
NOTES
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the
operational specification is not implied. Exposure to the above maximum rating
conditions for extended periods may affect device reliability.
ORDERING GUIDE
Model
Package
Res Temp Description
Package
Option
AD7390AN
AD7390AR
AD7391AN
AD7391AR
AD7391ARU
12
12
10
10
10
XIND
XIND
XIND
AUTO
XIND
8-Pin P-DIP
8-Lead SOIC
8-Pin P-DIP
8-Lead SOIC
TSSOP-8
N-8
SO-8
N-8
SO-8
RU-8
NOTES
XIND = Ϫ40°C to ϩ85°C; AUTO = Ϫ40°C to ϩ125°C
The AD7390 contains 558 transistors. The die size measures 70 mil X 68 mil.
CLR
LD
CLK
SDI
RESET
LOAD
DAC
REGISTER
12
CLK
12-BIT AD7390*
SHIFT REGISTER
D
PIN CONFIGURATIONS
TSSOP-8
1
2
TOP
VIEW
3 (Not to
4 Scale)
8
7
6
5
SO-8
18
27
TOP VIEW
3 (Not to Scale) 6
45
P-DIP-8
LD 1
CLK 2
SDI 3
CLR 4
TOP VIEW
(Not to Scale)
8 VREF
7 VDD
6 VOUT
5 GND
Pin No.
1
2
3
4
5
6
7
8
PIN DESCRIPTIONS
Name Function
LD
CLK
SDI
CLR
GND
VOUT
VDD
VREF
Load Strobe. Transfers shift register
data to DAC register while active low.
See truth table for operation.
Clock Input. Positive edge clocks data
into shift register.
Serial Data Input. Data loads directly
into the shift register.
Resets DAC register to zero condition.
Active low input.
Analog & Digital Ground.
DAC Voltage Output. Full-scale output
1 LSB less than reference input voltage
REF.
Positive Power Supply Input. Specified
range of operation ϩ2.7 V to ϩ5.5 V.
DAC Reference Input Pin. Establishes
DAC full-scale voltage.
* NOTE: AD7391 HAS A 10-BIT SHIFT REGISTER
Figure 3. Digital Control Logic
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 AD7390/AD7391 features proprietary ESD protection circuitry, permanent dam-
age may occur on devices subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–4– REV. 0

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AD7391 전자부품, 판매, 대치품
40
30
VDD = +5V
VREF = +3V
CODE = ØØØH
20
10
0
01
23
4
5
VOUT – V
Figure 14. IOUT at Zero Scale vs. VOUT
2µs
VOUT
(5mV/DIV)
AD7390
(5V/DIV)
20mV
VDD = 5V
VREF = 2.5V
fCLK = 50KHz
CODE: 7FH to 80H
TIME – 2µs/DIV
Figure 15. Midscale Transition
Performance
AD7390/AD7391
5µs
VOUT
(5mV/DIV)
VDD = 5V
VREF = 2.5V
fCLK = 50KHz
= HIGH
5mV
CLK
(5V/DIV)
TIME – 5µs/DIV
Figure 16. Digital Feedthrough
100µs
AD7390
VOUT
(1V/DIV)
(5V/DIV)
VDD = 5V
VREF = 2.5V
fCLK = 50KHz
1V
TIME – 100µs/div
Figure 17. Large Signal Settling Time
5
0
5
VDD = +5V
10 VREF = +100mV + 2VDC
DATA = FFFH
15
20
25
30
10
100 1K 10K
FREQUENCY – Hz
100K
Figure 18. Reference Multiplying
Bandwidth
2.0
AD7390
1.8 VDD = +5V
1.6 CODE = 768H
TA = 25 C
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
1 234
REFERENCE VOLTAGE – V
5
Figure 19. INL Error vs. Reference
Voltage
1.2
AD7390
SAMPLE SIZE = 50
1.0
0.8
CODE = FFFH
0.6
0.4
0.2 CODE = 000H
0.0
0
100 200 300 400 500
HOURS OF OPERATION AT 150°C
Figure 20. Long-Term Drift
Accelerated by Burn-In
600
REV. 0
–7–

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