AD7228ACRZ Analog Devices Inc, AD7228ACRZ Datasheet - Page 4
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AD7228ACRZ
Manufacturer Part Number
AD7228ACRZ
Description
OCTAL 8-BIT 5-15V DAC IC
Manufacturer
Analog Devices Inc
Datasheet
1.AD7228ABRZ.pdf
(8 pages)
Specifications of AD7228ACRZ
Settling Time
5µs
Number Of Bits
8
Data Interface
Parallel
Number Of Converters
8
Voltage Supply Source
Dual ±
Power Dissipation (max)
310mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (7.5mm Width)
Number Of Channels
8
Resolution
8b
Conversion Rate
200KSPS
Interface Type
Parallel
Single Supply Voltage (typ)
5/15V
Dual Supply Voltage (typ)
-5/12/-5/15V
Architecture
R-2R
Power Supply Requirement
Single/Dual
Output Type
Voltage
Integral Nonlinearity Error
±2LSB
Single Supply Voltage (min)
4.75/13.5V
Single Supply Voltage (max)
5.25/16.5V
Dual Supply Voltage (min)
-4.5/10.8V
Dual Supply Voltage (max)
-5.5/16.5V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
24
Package Type
SOIC W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD7228ACRZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
AD7228A
ABSOLUTE MAXIMUM RATINGS
V
V
Digital Input Voltage to GND . . . . . . . . . . . . . . . –0.3 V, V
V
V
Power Dissipation (Any Package) to +75 C . . . . . . . 1000 mW
Operating Temperature
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 AD7228A 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.
Model
AD7228ABN
AD7228ACN
AD7228ABP
AD7228ACP
AD7228ABR
AD7228ACR
AD7228ABQ
AD7228ACQ
AD7228ATQ
AD7228AUQ
NOTES
1
2
3
To order MIL-STD-883, Class B processed parts, add /883B to part number.
N = Plastic DIP; P = Plastic Leaded Chip Carrier (PLCC); Q = Cerdip;
These grades will be available to /883B processing only.
Contact your local sales office for military data sheet and availability.
R = Small Outline IC (SOIC).
DD
DD
REF
OUT
Derates above 75 C by . . . . . . . . . . . . . . . . . . . . 2.0 mW/ C
Commercial . . . . . . . . . . . . . . . . . . . . . . . . –40 C to +85 C
Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . –40 C to +85 C
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +17 V
to V
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V, V
DIP AND SOIC
to GND
1
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +24 V
3
3
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
Temperature
Range
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–55 C to +125 C
–55 C to +125 C
PIN CONFIGURATIONS
ORDERING GUIDE
1
Total
Unadjusted
Error (LSB) Option
2 max
1 max
2 max
1 max
2 max
1 max
2 max
1 max
2 max
1 max
PLCC
Package
N-24
N-24
P-28A
P-28A
R-24
R-24
Q-24
Q-24
Q-24
Q-24
SS
, V
DD
DD
DD
2
–4–
Storage Temperature . . . . . . . . . . . . . . . . . . –65 C to +150 C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . +300 C
NOTES
1
2
CIRCUIT INFORMATION
D/A SECTION
The AD7228A contains eight identical, 8-bit, voltage-mode
digital-to-analog converters. The output voltages from the con-
verters have the same polarity as the reference voltage, allowing
single supply operation. A novel DAC switch pair arrangement
on the AD7228A allows a reference voltage range from +2 V to
+10 V when operated from a V
of a highly stable, thin-film, R-2R ladder and eight high-speed
NMOS switches. The simplified circuit diagram for one channel
is shown in Figure 3. Note that V
all eight DACs.
The input impedance at the V
parallel combination of the eight individual DAC reference in-
put impedances. It is code dependent and can vary from 2 k to
infinity. The lowest input impedance occurs when all eight
DACs are loaded with digital code 01010101. Therefore, it is
important that the external reference source presents a low out-
put impedance to the V
changing load conditions. Due to transient currents at the refer-
ence input during digital code changes a 0.1 F (or greater)
decoupling capacitor is recommended on the V
applications. The nodal capacitance at the reference terminal is
also code dependent and typically varies from 120 pF to
350 pF.
Each V
voltage source with an output voltage:
The output impedance is that of the output buffer amplifier as
described in the following section.
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 sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Outputs may be shorted to any voltage in the range V
power dissipation of the package is not exceeded. Typical short circuit current for
a short to GND or V
Extended . . . . . . . . . . . . . . . . . . . . . . . . . –55 C to +125 C
V
where D
code and can vary from 0 to 255/256.
OUTN
OUT
= D
Figure 3. D/A Simplified Circuit Diagram
N
pin can be considered as a digitally programmable
N
is a fractional representation of the digital input
• V
SS
REF
is 50 mA.
REF
terminal of the AD7228A under
REF
DD
REF
pin of the AD7228A is the
WARNING!
of +15 V. Each DAC consists
and GND are common to
SS
to V
ESD SENSITIVE DEVICE
REF
DD
provided that the
input for dc
REV. A