AD5421 Analog Devices, AD5421 Datasheet - Page 8

• Manufacturer Part Number: AD5421
• Description: 16-Bit, Serial Input, Loop-Powered, 4mA to 20mA DAC
• Manufacturer: Analog Devices

Specifications of AD5421

• Resolution (bits): 16bit
• Dac Settling Time: 50µs
• Max Pos Supply (v): +52V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: SPI

AD5421
AC PERFORMANCE CHARACTERISTICS
Loop voltage = 24 V; REFIN = 2.5 V external; R
Table 3.
Parameter
DYNAMIC PERFORMANCE
1
TIMING CHARACTERISTICS
Loop voltage = 24 V; REFIN = 2.5 V external; R
Table 4.
Parameter
t
t
t
t
t
t
t
t
t
t
t
t
t
1
2
3
Table 5. SPI Watchdog Timeout Periods
T0
0
0
0
0
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13
Temperature range: −40°C to +105°C; typical at +25°C.
Guaranteed by design and characterization; not production tested.
All input signals are specified with t
See Figure 2 and Figure 3.
Specifications guaranteed by design and characterization; not production tested.
Loop Current Settling Time
Loop Current Slew Rate
AC Loop Voltage Sensitivity
Parameter
T1
0
0
1
1
0
0
1
1
1
1, 2, 3
1
T2
0
1
0
1
0
1
0
1
Limit at T
33
17
17
17
10
25
5
5
25
10
70
0
70
R
MIN
= t
Min
43
87
436
873
1746
2619
3493
4366
, T
F
= 5 ns (10% to 90% of DV
MAX
Min
Unit
ns min
ns min
ns min
ns min
ns min
µs min
ns min
ns min
µs min
ns min
ns max
ns min
ns max
L
L
Typ
50
100
500
1000
2000
3000
4000
5000
= 250 Ω; all specifications T
= 250 Ω; all specifications T
Description
SCLK cycle time
SCLK high time
SCLK low time
SYNC falling edge to SCLK falling edge setup time
SCLK falling edge to SYNC rising edge
Minimum SYNC high time
Data setup time
Data hold time
SYNC rising edge to LDAC falling edge
LDAC pulse width low
SCLK rising edge to SDO valid (C
SYNC falling edge to SCLK rising edge setup time
SYNC rising edge to SDO tristate (C
Typ
50
400
1.3
DD
) and timed from a voltage level of 1.2 V.
Rev. C | Page 8 of 36
Max
59
117
582
1163
2326
3489
4652
5814
Max
MIN
MIN
to T
to T
Unit
µs
µA/µs
µA/V
Unit
ms
ms
ms
ms
ms
ms
ms
ms
MAX
MAX
L SDO
, unless otherwise noted.
.
L SDO
= 30 pF)
Test Conditions/Comments
To 0.1% FSR, C
C
1200 Hz to 2200 Hz, 5 V p-p, R
= 30 pF)
IN
= open circuit
IN
= open circuit
Data Sheet
L
= 3 kΩ