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參數(shù)資料
| 型號： | AD7118TQ2 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | LOGDAC CMOS Logarithmic D/A Converter |
| 中文描述： | LOGDAC的CMOS對數(shù)D / A轉(zhuǎn)換 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 197K |
| 代理商： | AD7118TQ2 |
AD7118
REV. A
–3–
ABSOLUT E MAX IMUM RAT INGS*
(T
A
= +25
°
C unless otherwise noted)
V
DD
(to DGND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +17 V
V
IN
(to AGND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
35 V
Digital Input Voltage to DGND . . . . . –0.3 V to V
DD
+ 0.3 V
I
OUT
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V
DD
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V
DD
DGND to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V
DD
Power Dissipation (Any Package)
T o +75
°
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 mW
Derates Above +75
°
C by . . . . . . . . . . . . . . . . . . . 6 mW/
°
C
Operating T emperature Range
Commercial (K , L Versions) . . . . . . . . . . . . . 0
°
C to +70
°
C
Industrial (B, C Versions) . . . . . . . . . . . . . –25
°
C to +85
°
C
Extended (T , U Versions) . . . . . . . . . . . . –55
°
C to +125
°
C
Storage T emperature . . . . . . . . . . . . . . . . . . –65
°
C to +150
°
C
Lead T emperature (Soldering, 10 sec) . . . . . . . . . . . . +300
°
C
*Stresses above those listed under “Absolute Maximum Ratings may cause perma-
nent damage to the device. T his 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.
T E RMINOLOGY
RE SOLUT ION:
Nominal change in attenuation when moving
between two adjacent binary codes.
MONOT ONICIT Y :
T he device is monotonic if the analog out-
put decreases (or remains constant) as the digital code increases.
FE E DT HROUGH E RROR:
T hat portion of the input signal
which reaches the output when all digital inputs are high. See
section on Applications.
OUT PUT LE AK AGE CURRE NT :
Current which appears on
the I
OUT
terminal with all digital inputs high.
T OT AL HARMONIC DIST ORT ION:
Is a measure of the
harmonics introduced by the circuit when a pure sinusoid is
applied to the input. It is expressed as the harmonic energy
divided by the fundamental energy at the output.
ACCURACY :
Is the difference (measured in dB) between the
ideal transfer function as listed in T able I and the actual transfer
function as measured with the device.
OUT PUT CAPACIT ANCE :
Capacitance from I
OUT
to
ground.
DIGIT AL-T O-ANALOG GLIT CH IMPULSE :
T he amount
of charge injected from the digital inputs to the analog output
when the inputs change state. T his is normally specified as the
area of the glitch in either pA-secs or nV-secs depending upon
whether the glitch is measured as a current or voltage signal.
Digital charge injection is measured with V
IN
= AGND.
PROPAGAT ION DE LAY :
T his is a measure of the internal
delays of the circuit and is defined as the time from a digital in-
put change to the analog output current reaching 90% of its
final value.
INT E RMODULAT ION DIST ORT ION:
Is a measure of the
interaction which takes place within the circuit between two
sinusoids applied simultaneously to the input.
T he reader is referred to Hewlett Packard Application Note 192
for further information.
WARNING!
ESD SENSITIVE DEVICE
C AUT ION
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 AD7118 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. T herefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
Applications Information–
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