參數(shù)資料
型號： EVAL-AD421EB
廠商： Analog Devices, Inc.
英文描述： Loop-Powered 4 mA to 20 mA DAC
中文描述： 回路供電4毫安到20毫安援
文件頁數(shù)： 2/14頁
文件大?。?/td> 171K
代理商： EVAL-AD421EB
DAC SPECIFICATIONS
Parameter
B Versions
2
Units
Conditions/Comments
ACCURACY
Resolution
Monotonicity
Integral Nonlinearity
Offset (4 mA) @ +25
°
C
4
Offset Drift
Total Output Error (20 mA) @ +25
°
C
4
Total Output Drift
V
CC
Supply Sensitivity
VOLTAGE REFERENCE
REF OUT2
Output Voltage
Drift
16
16
±
0.01
±
0.1
±
25
±
0.2
±
50
50
Bits
Bits min
% of FS max
% of FS max
ppm of FS/
°
C max
% of FS max
ppm of FS/
°
C max
nA/mV max
FS = Full-Scale Output Current
V
CC
= 5 V
Includes On-Chip Reference Drift
V
CC
= 5 V
Includes On-Chip Reference Drift
25 nA/mV Typical
2.49/2.51
±
40
V min/V max
ppm/
°
C max
2.5 V Nominal
20 ppm/
°
C Typical from –40
°
C to +25
°
C and
–2.5 ppm/
°
C Typical from +25
°
C to +85
°
C
Externally Available Current
V
CC
Supply Sensitivity
Output Impedance
Noise (0.1 Hz–10 Hz)
REF OUT1
Output Voltage
Drift
0.5
150
3
6
mA min
μ
V/V max
typ
μ
V (p-p) typ
15
μ
V/V Typical
1.24/1.26
±
50
V min/V max
ppm/
°
C max
1.25 V Nominal, 100 k
Load to COM
5
20 ppm/
°
C Typical from –40
°
C to +25
°
C and
2 ppm/
°
C Typical from +25
°
C to +85
°
C
Externally Available Current
V
CC
Supply Sensitivity
Output Impedance
Noise (0.1 Hz–10 Hz)
REF IN
Input Resistance
DIGITAL INPUTS
V
IH
(Logic 1)
V
IL
(Logic 0)
I
IH
I
IL
Data Coding
Data Rate
POWER SUPPLIES
Operating Range
Quiescent Current
@ V
CC
= 3 V
@ V
CC
= 5 V
NOTES
1
The DN25D is available from Supertex, Inc., 1350 Bordeaux Drive, Sunnyvale, CA 94089.
2
Temperature range is –40
°
C to +85
°
C.
3
The max current loop voltage compliance is determined by the pass transistor breakdown voltage and is 350 V for the DN25D.
4
With V
= 3 V, the transfer function shifts negative by typically 0.25%; a 16 k
resistor connected between COM and LOOPRTN will approximately compensate for the V
CC
supply sensitivity in moving from 5 V to 3 V by skewing the gain of the AD421.
5
100 k
resistor only required if this reference is being used in application circuits.
Specifications subject to change without notice.
0.5
150
3
4
mA min
μ
V/V max
typ
μ
V (p-p) typ
15
μ
V/V Typical
40
k
typ
0.75
×
V
CC
0.25
×
V
CC
±
10
±
10
Binary
10
V min
V max
μ
A max
μ
A max
V
IN
= V
CC
V
IN
= 0 V
Mbps max
+2.95 to +5.05
V min to V max
Functional to 7 V
650
750
μ
A max
μ
A max
475
μ
A Typical
575
μ
A Typical
AD421–LOOP-POWERED SPECIFICATIONS
Parameter
OUTPUT CHARACTERISTICS
Current Loop Voltage Compliance
3
B Versions
2
Units
Conditions/Comments
V
CC
+ 2
350
8
25
2
V min
V max
ms typ
M
typ
μ
A/V typ
DN25D Breakdown Voltage
Settling Time to
±
0.1%, C1 = C2 = 10 nF, C3 = 3.3 nF
Full-Scale Settling Time
Output Impedance
AC Loop Voltage Sensitivity
VOLTAGE REGULATOR
Output Voltage (V
CC
)
3 V Mode
3.3 V Mode
5 V Mode
Externally Available Current
Line Regulation
Load Regulation
1200 Hz to 2200 Hz
2.95/3.05
3.25/3.35
4.95/5.05
3.25
1
15
V min/V max
V min/V max
V min/V max
mA min
μ
V/V typ
μ
V/mA typ
3 V Nominal. LV Pin Connected to V
CC
3.3 V Nominal. LV Pin Connected Through 0.01
μ
F to V
CC
5 V Nominal. LV Pin Connected to COM
Assuming 4 mA Flowing in the Loop
–2–
(Using DN25D
1
as pass transistor as per Figure 3;
REF IN = REF OUT2; T
A
= T
MIN
to T
MAX
unless otherwise noted)
REV. C
(V
CC
= +3V to +5V; REF IN = REF OUT2; T
A
= T
MIN
to T
MAX
unless otherwise noted)
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