AD7391 Analog Devices, AD7391 Datasheet

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AD7391

Manufacturer Part Number
AD7391
Description
+3/+5 Volt Serial-Input Micropower 10-Bit DAC
Manufacturer
Analog Devices
Datasheet

Specifications of AD7391

Resolution (bits)
10bit
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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Manufacturer
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Price
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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 AD7391

AD7391 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 3584 4096 3 V Serial-Input ...

Page 2

... AD7390/AD7391–SPECIFICATIONS AD7390 ELECTRICAL CHARACTERISTICS Parameter STATIC PERFORMANCE 1 Resolution 2 Relative Accuracy 2 Differential Nonlinearity Zero-Scale Error Full-Scale Voltage Error 3 Full-Scale Tempco REFERENCE INPUT V Range REF IN Input Resistance 3 Input Capacitance ANALOG OUTPUT Output Current (Source) Output Current (Sink) 3 Capacitive Load LOGIC INPUTS Logic Input Low Voltage ...

Page 3

... Feedthrough SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current Power Dissipation Power Supply Sensitivity NOTES 1 One LSB = V /1024 V for the 10-bit AD7391. 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 4

... TSSOP-8 Package (RU- 240°C/W Maximum Junction Temperature (T J MAX Operating Temperature Range . . . . . . . . . . AD7391AR . . . . . . . . . . . . . . . . . . . . . . . . Storage Temperature Range . . . . . . . . . . . Lead Temperature (Soldering, 10 secs 300°C Stresses above those listed under Absolute Maximum Ratings may cause perma- nent 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 specification is not implied ...

Page 5

... 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 MSB AD7391 ...

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

... One advantage of the rail-to-rail output amplifiers used in the AD7390/ AD7391 is the wide range of usable supply voltage. The part is fully specified and tested for operation from 2 5.5 V. POWER SUPPLY BYPASSING AND GROUNDING Precision analog products, such as the AD7390/AD7391, require a well filtered power source ...

Page 9

... AD7390/AD7391 power supply. If this mode of interface is used, make sure that the V of the 5 V CMOS meets the V input requirement of the AD7390/ IL AD7391 operating See TPC 6 for a graph for digital logic input threshold versus operating LOGIC ...

Page 10

... The AD7390 will only respond to the last 12 bits clocked into the SDI input, however, so the serial-data (4) interface is not affected. Ten data bits are required to load a value into the AD7391. If more than 10 bits are transmitted before load LD returns high, the extra bits are ignored. . The micropower REF195 is guaranteed ...

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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