參數(shù)資料
型號: EVAL-AD5421SDZ
廠商: Analog Devices Inc
文件頁數(shù): 9/36頁
文件大小: 0K
描述: BOARD EVAL FOR AD5421
標(biāo)準(zhǔn)包裝: 1
DAC 的數(shù)量: 1
位數(shù): 16
數(shù)據(jù)接口: 串行,SPI?
設(shè)置時間: 50µs
DAC 型: 電壓
工作溫度: -40°C ~ 105°C
已供物品:
已用 IC / 零件: AD5421
Data Sheet
AD5421
Rev. G | Page 17 of 36
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.6
0.8
0.4
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
V
O
L
T
AG
E
ACRO
S
500
LOA
D
R
ES
IS
TOR
(m
V)
TIME (Seconds)
VLOOP = 24V
EXT NMOS
INT VREF
ILOOP = 4mA
RLOAD = 500
TA = 25°C
1.33mV p-p
0.2mV rms
09128-
023
Figure 25. Loop Current Noise, 500 Hz to 10 kHz Bandwidth
(HART Bandwidth)
6
5
4
3
2
1
0
–40
–30
–20
–10
0
10
20
30
40
V
O
L
T
AG
E
ACRO
S
250
LOA
D
R
ES
IS
TOR
(V)
TIME (s)
FALLING
RISING
VLOOP = 24V
EXT NMOS
RLOAD = 250
TA = 25°C
CIN = OPEN CIRCUIT
09128-
025
Figure 26. Full-Scale Loop Current Step
6
5
4
3
2
1
0
–1.0
–0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
V
O
L
T
AG
E
ACRO
S
250
LOA
D
R
ES
IS
TOR
(V)
TIME (ms)
FALLING
RISING
VLOOP = 24V
EXT NMOS
RLOAD = 250
TA = 25°C
CIN = 22nF
09128-
026
Figure 27. Full-Scale Loop Current Step, CIN = 22 nF
0.244
0.226
0.228
0.230
0.232
0.234
0.236
0.238
0.240
0.242
0
0.5
1.0
1.5
2.0
IOD
V
DD
CURRE
NT
(
A)
DIGITAL LOGIC VOLTAGE (V)
DECREASING
INCREASING
IODVDD = 1.8V
TA = 25°C
09128-
027
Figure 28. IODVDD Current vs. Digital Logic Voltage, Increasing and
Decreasing, IODVDD = 1.8 V
0.60
0.55
0.50
0.45
0.40
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
IOD
V
DD
CURRE
NT
(
A)
DIGITAL LOGIC VOLTAGE (V)
IODVDD = 3.3V
TA = 25°C
DECREASING
INCREASING
09128-
028
Figure 29. IODVDD Current vs. Digital Logic Voltage, Increasing and
Decreasing, IODVDD = 3.3 V
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0
6
5
4
3
2
1
IOD
V
DD
CURRE
NT
(
A)
DIGITAL LOGIC VOLTAGE (V)
IODVDD = 5V
TA = 25°C
DECREASING
INCREASING
09128-
029
Figure 30. IODVDD Current vs. Digital Logic Voltage, Increasing and
Decreasing, IODVDD = 5 V
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