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參數(shù)資料
| 型號(hào)： | AD7943 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | +3.3 V/+5 V Multiplying 12-Bit DACs(12位乘法D/A轉(zhuǎn)換器) |
| 中文描述： | 3.3伏/ 5伏乘以12位DAC（12位乘法的D / A轉(zhuǎn)換器） |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大小： | 340K |
| 代理商： | AD7943 |
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AD7943/AD7945/AD7948
REV. B
–3–
Parameter
A Grades
2
Units
Test Conditions/Comments
ACCURACY
Resolution
12
Bits
1 LSB = (V
IOUT1
– V
REF)
/2
12
= 300
μ
V When
V
IOUT1
= 1.23 V and V
REF
= 0 V
Relative Accuracy
Differential Nonlinearity
±
1
±
0.9
LSB max
LSB max
All Grades Guaranteed Monotonic
over Temperature
Gain Error @ +25
°
C
T
MIN
to T
MAX
Gain Temperature Coefficient
3
±
3
±
4
2
5
LSB max
LSB max
ppm FSR/
°
C typ
ppm FSR/
°
C max
Output Leakage Current
I
OUT1
@ +25
°
C
T
MIN
to T
MAX
Input Resistance
@ I
OUT2
Pin (AD7943)
@ AGND Pin (AD7945, AD7948)
See Terminology Section
10
100
nA max
nA max
Typically 20 nA over Temperature
This Varies with DAC Input Code
6
6
k
min
k
min
DIGITAL INPUTS
V
INH
, Input High Voltage @ V
DD
= +5 V
V
INH
, Input High Voltage @ V
DD
= +3.3 V
V
INL
, Input Low Voltage @ V
DD
= +5 V
V
INL
, Input Low Voltage @ V
DD
= +3.3 V
I
INH
, Input Current
C
IN
, Input Capacitance
3
DIGITAL OUTPUT (SRO)
Output Low Voltage (V
OL
)
Output High Voltage (V
OH
)
2.4
2.1
0.8
0.6
±
1
10
V min
V min
V max
V max
μ
A max
pF max
For 1 CMOS Load
0.2
V
DD
– 0.2
V max
V min
POWER REQUIREMENTS
V
DD
Range
Power Supply Sensitivity
3
Gain/
V
DD
I
DD
(AD7943)
3.0/5.5
V min/V max
–75
5
dB typ
μ
A max
V
INH
= V
DD
– 0.1 V min, V
INL
= 0.1 V max.
SRO Open Circuit; No STB Signal; Typically
1
μ
A. Typically 100
μ
A with 1 MHz STB
Frequency.
V
INH
= V
DD
– 0.1 V min, V
INL
= 0.1 V max.
Typically 1
μ
A.
I
DD
(AD7945, AD7948)
5
μ
A max
NOTES
1
These specifications apply with the devices biased up at 1.23 V for single supply applications. The model numbering reflects this by means of a “–B” suffix
(for example: AD7943AN-B). Figure 16 is an example of Biased Mode Operation.
2
Temperature ranges as follows: A Versions: –40
°
C to +85
°
C.
3
Guaranteed by design.
Specifications subject to change without notice.
BIASED MODE
wise noted. AD7945, AD7948: V
DD
= +3 V to +5.5 V; V
IOUT1
= AGND = 1.23 V; V
REF
= +0 V to 2.45 V; T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
SPECIFICATIONS
1
(AD7943: V
DD
= +3 V to +5.5 V; V
IOUT1
= V
IOUT2
= AGND = 1.23 V; V
REF
= +0 V to 2.45 V; T
A
= T
MIN
to T
MAX
, unless other-
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