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參數資料
| 型號： | AD7849 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Serial Input, 14-Bit/16-Bit DAC |
| 中文描述： | 串行輸入，14-Bit/16-Bit援 |
| 文件頁數： | 2/15頁 |
| 文件大小： | 211K |
| 代理商： | AD7849 |
A
Versions
B, T
Versions
C
Versions
Parameter
Units
Test Conditions/Comments
RESOLUTION
14
16
16
Bits
A Versions: 1 LSB = 2 (V
–V
REF–
)/2
14
B, C, T Versions: 1 LSB = 2 (V
REF+
–V
REF–
)/2
16
V
REF–
= 0 V, V
OUT
= 0 V to +10 V
UNIPOLAR OUTPUT
Relative Accuracy @ +25
°
C
T
to T
Differential Nonlinearity
Gain Error @ +25
°
C
T
to T
Offset Error @ +25
°
C
T
to T
MAX
Gain TC
3
Offset TC
3
±
4
±
5
±
0.25
±
1
±
4
±
1
±
6
±
2
±
2
±
6
±
16
±
0.9
±
4
±
16
±
4
±
24
±
2
±
2
±
4
±
8
±
0.5
±
4
±
16
±
4
±
16
±
2
±
2
LSBs typ
LSBs max
LSBs max
LSBs typ
LSBs max
LSBs typ
LSBs max
ppm FSR/
°
C typ
ppm FSR/
°
C typ
All Grades Guaranteed Monotonic Over Temperature
V
OUT
Load = 10 M
BIPOLAR OUTPUT
Relative Accuracy @ +25
°
C
T
MIN
to T
MAX
Differential Nonlinearity
Gain Error @ +25
°
C
T
to T
Offset Error @ +25
°
C
T
to T
Bipolar Zero Error @ +25
°
C
T
to T
MAX
Gain TC
Offset TC
3
Bipolar Zero TC
3
V
REF–
= –5 V, V
OUT
= –10 V to +10 V
±
2
±
3
±
0.25
±
1
±
4
±
0.5
±
3
±
0.5
±
4
±
2
±
2
±
2
±
3
±
8
±
0.9
±
4
±
16
±
2
±
12
±
2
±
12
±
2
±
2
±
2
±
2
±
4
±
0.5
±
4
±
16
±
2
±
8
±
2
±
8
±
2
±
2
±
2
LSBs typ
LSBs max
LSBs max
LSBs typ
LSBs max
LSBs typ
LSBs max
LSBs typ
LSBs max
ppm FSR/
°
C typ
ppm FSR/
°
C typ
ppm FSR/
°
C typ
All Grades Guaranteed Monotonic Over Temperature
V
OUT
Load = 10 M
REFERENCE INPUT
Input Resistance
25
43
V
SS
+ 6 to
V
DD
– 6
V
SS
+ 6 to
V
DD
– 6
25
43
V
SS
+ 6 to
V
DD
– 6
V
SS
+ 6 to
V
DD
– 6
25
43
V
SS
+ 6 to
V
DD
– 6
V
SS
+ 6 to
V
DD
– 6
k
min
k
max
Volts
Resistance from V
REF+
to V
REF–
Typically 34 k
V
REF+
Range
V
REF–
Range
Volts
OUTPUT CHARACTERISTICS
Output Voltage Swing
V
SS
+ 4 to
V
DD
– 4
2
200
0.3
±
25
V
SS
+ 4 to
V
DD
– 4
2
200
0.3
±
25
V
SS
+ 4 to
V
DD
– 4
2
200
0.3
±
25
V max
Resistive Load
Capacitive Load
Output Resistance
Short Circuit Current
k
min
pF max
typ
mA typ
To 0 V
To 0 V
Voltage Range: –10 V to +10 V
DIGITAL INPUTS
V
INH
, Input High Voltage
V
INL
, Input Low Voltage
I
INH
, Input Current
C
IN
, Input Capacitance
2.4
0.8
±
10
10
2.4
0.8
±
10
10
2.4
0.8
±
10
10
V min
V max
μ
A max
pF max
DIGITAL OUTPUTS
V
OL
(Output Low Voltage)
V
(Output High Voltage)
Floating State Leakage Current
Floating State Output
Capacitance
POWER REQUIREMENTS
4
V
DD
V
SS
V
CC
I
DD
I
SS
I
Power Supply Sensitivity
5
Power Dissipation
NOTES
1
Temperature ranges: A, B, C Versions: –40
°
C to +85
°
C; T Version: –55
°
C to +125
°
C.
2
Minimum load for T Version is 3 k
.
3
Guaranteed by design and characterization, not production tested.
4
The AD7849 is functional with power supplies of
±
12 V. See Typical Performance Curves.
5
Sensitivity of Gain Error, Offset Error and Bipolar Zero Error to V
DD
, V
SS
variations.
Specifications subject to change without notice.
0.4
4.0
±
10
0.4
4.0
±
10
0.4
4.0
±
10
Volts max
Volts min
μ
A max
I
SINK
= 1.6 mA
I
SOURCE
= 400
μ
A
10
10
10
pF max
+14.25/+15.75 +14.25/+15.75 +14.25/+15.75
–14.25/–15.75
–14.25/–15.75
+4.75/+5.25
+4.75/+5.25
5
5
5
5
2.5
2.5
0.4
1.5
100
100
V min/V max
V min/V max
V min/V max
mA max
mA max
mA max
LSB/V max
mW typ
–14.25/–15.75
+4.75/+5.25
5
5
2.5
1.5
100
V
OUT
Unloaded, V
INH
= V
DD
– 0.1 V, V
INL
= 0.1 V
V
OUT
Unloaded, V
= V
– 0.1 V, V
INL
= 0.1 V
V
INH
= V
DD
– 0.1 V, V
INL
= 0.1 V
V
OUT
Unloaded
AD7849–SPECIFICATIONS
1
(V
DD
= +14.25 V to +15.75 V; V
SS
= –14.25 V to –15.75 V; V
CC
= +4.75 V to +5.25 V; V
OUT
loaded with 2 k
,
2
200 pF to 0 V; V
REF+
= +5 V;
R
OFS
connected to 0 V; T
A
= T
MIN
to T
MAX
, unless otherwise noted)
REV. B
–2–
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