AD7390 Analog Devices, AD7390 Datasheet

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AD7390

Manufacturer Part Number
AD7390
Description
+3/+5 Volt Serial-Input Micropower 12-Bit DAC
Manufacturer
Analog Devices
Datasheet

Specifications of AD7390

Resolution (bits)
12bit
Dac Update Rate
17kSPS
Dac Settling Time
60µs
Max Pos Supply (v)
+5.5V
Single-supply
Yes
Dac Type
Voltage Out
Dac Input Format
Ser,SPI

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a
GENERAL DESCRIPTION
The AD7390/AD7391 family of 10-bit and 12-bit voltage-
output digital-to-analog converters is designed to operate
from a single 3 V supply. Built using a CBCMOS process,
these monolithic DACs offer the user low cost, and ease-of-use
in single-supply 3 V systems. Operation is guaranteed over the
supply voltage range of 2.7 V to 5.5 V consuming less than 100 µA
making this device ideal for battery operated applications.
The full-scale voltage output is determined by the external
reference input voltage applied. The rail-to-rail REF
DAC
supply V
A doubled-buffered serial-data interface offers high-speed,
3-wire, SPI and microcontroller compatible inputs using data
OUT
1.00
0.75
0.50
0.25
0.00
0.25
0.50
0.75
1.00
DD
allows for a full-scale voltage set equal to the positive
0
or any value in between.
AD7390
V
T
SUPERIMPOSED
DD
A
=
512
= 3.0V
55 C, +25 C, +85 C
1024
1536
CODE – Decimal
2048
2560
3072
3584
IN
4096
to
Micropower 10-Bit and 12-Bit DACs
in (SDI), clock (CLK) and load strobe (LD) pins. Addition-
ally, 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 without
circuit card redesign.
The AD7390/AD7391 are specified over the extended industrial
( 40°C to
specified for the
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.
2.0
1.5
1.0
0.5
0.0
0.5
1.0
1.5
2.0
CLR
CLK
REF
SDI
LD
0
FUNCTIONAL BLOCK DIAGRAM
V
V
85°C) temperature range. The AD7391AR is
AD7390
DD
REF
512
= 3.0V
= 2.5V
EN
40°C to
1024
AD7390
SERIAL REGISTER
1536
DAC REGISTER
AD7390/AD7391
CODE – Decimal
12-BIT DAC
+25 C, +85 C
55 C
125°C automotive temperature
3 V Serial-Input
2048
12
12
2560
3072
2584
V
V
GND
DD
OUT
4096

Related parts for AD7390

AD7390 Summary of contents

Page 1

... The AD7390/AD7391 are specified over the extended industrial ( 40°C to specified for the to IN 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. 2560 3072 ...

Page 2

... Feedthrough SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current Power Dissipation Power Supply Sensitivity NOTES 1 One LSB = V /4096 V for the 12-bit AD7390. REF 2 The first two codes (000 , 001 ) are excluded from the linearity error measurement These parameters are guaranteed by design and not subject to production testing. ...

Page 3

... Load Load DISS IL ∆V = ± 5% PSS (10 and timed from a voltage level of 1 AD7390/AD7391 < unless otherwise noted 10 10 ± 1.75 ± 1.75 ± 2.0 ± 2.0 125°C ± 3 ± 0.9 ± 0.9 ± ...

Page 4

... 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 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 ...

Page 5

... Effect ↑ Disabled ↑ = Positive logic transition Don’t care. Table II. AD7390 Serial Input Register Data Format, Data is Loaded in the MSB-First Format MSB B11 B10 B9 AD7390 D11 D10 D9 Table III. AD7391 Serial Input Register Data Format, Data is Loaded in the MSB-First Format ...

Page 6

... AD7390/AD7391–Typical Performance Characteristics 100 UNITS 2. 2.5V REF 5.0 5.8 6.6 7.3 8.1 8.9 9.7 10.5 11.2 12.0 TOTAL UNADJUSTED ERROR – LSB 2.5V 14 REF 100 1k 10k 100k FREQUENCY – Hz 100 SAMPLE SIZE = 300 UNITS 5.0V ...

Page 7

... H H TIME – 2 s/DIV –5 –10 –15 –20 –25 – 50mV 2V dc REF –35 DATA = FFF H –40 100 1k 10k 100k FREQUENCY – Hz AD7390/AD7391 2.5V REF f = 50kHz CLK LD = HIGH V OUT (5mV/DIV) CLK (5V/DIV) 5mV TIME – 5 s/DIV 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0 ...

Page 8

... AD7390/AD7391 OPERATION The AD7390 and AD7391 are a set of pin compatible, 12-bit/ 10-bit digital-to-analog converters. These single-supply opera- tion devices consume less than 100 microamps of current while operating from power supplies in the 2 5.5 V range mak- ing them ideal for battery operated applications. They contain a ...

Page 9

... Input (SDI) is clocked into the shift register on the rising edge of CLK. Data is entered in MSB-first format. Twelve clock pulses are required to load the 12-bit AD7390 DAC value. If additional bits are clocked into the shift register, for example when a microcontroller sends two 8-bit bytes, the MSBs are ignored (Figure 9) ...

Page 10

... DAC. In cases where no serial port is provided being used for some other purpose (such as an RS-232 communications interface), the AD7390/AD7391 can easily be addressed in software. Twelve data bits are required to load a value into the AD7390. to full-scale H If more than 12 bits are transmitted before the load LD input goes high, the extra (i ...

Page 11

... TSSOP (RU-8) 0.122 (3.10) 0.114 (2.90 0.177 (4.50) 0.169 (4.30) 0.256 (6.50) 0.246 (6.25 PIN 1 0.0256 (0.65) BSC 0.0433 0.006 (0.15) (1.10) MAX 0.002 (0.05 0.0118 (0.30) SEATING 0.0079 (0.20) 0.0075 (0.19) PLANE 0.0035 (0.090) AD7390/AD7391 0.0196 (0.50) 45 0.0099 (0.25) 8 0.0500 (1.27) 0 0.0160 (0.41) 0.195 (4.95) 0.115 (2.93) 0.015 (0.381) 0.008 (0.204) 0.028 (0.70) 0.020 (0.50) ...

Page 12

... AD7390/AD7391 Revision History Location Data Sheet changed from REV REV. A. Edits to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Edits to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Edits to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Edit to Figure Edit to TPC Page ...

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