AD5643R Analog Devices, AD5643R Datasheet - Page 7

• Manufacturer Part Number: AD5643R
• Manufacturer: Analog Devices

Specifications of AD5643R

• Resolution (bits): 14bit
• Dac Update Rate: 250kSPS
• Dac Settling Time: 3.5µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: Ser,SPI

TIMING CHARACTERISTICS
All input signals are specified with t
V
Table 5.
Parameter
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
1
2
TIMING DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Guaranteed by design and characterization, not production tested.
Maximum SCLK frequency is 50 MHz at V
2
DD
= 2.7 V to 5.5 V; all specifications T
1
2
ASYNCHRONOUS LDAC UPDATE MODE.
SYNCHRONOUS LDAC UPDATE MODE.
LDAC
LDAC
SYNC
SCLK
V
CLR
OUT
DIN
1
2
Limit at T
V
20
9
9
13
5
5
0
15
13
0
10
15
5
0
300
DD
= 2.7 V to 5.5 V
MIN
t
DD
8
t
, T
10
R
= 2.7 V to 5.5 V.
= t
MAX
DB23
MIN
F
= 1 ns/V (10% to 90% of V
t
13
t
to T
4
t
5
t
15
MAX
t
6
, unless otherwise noted.
t
3
Figure 2. Serial Write Operation
Unit
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns max
Rev. D | Page 7 of 32
t
1
t
2
DD
DB0
) and timed from a voltage level of (V
t
t
14
7
t
Conditions/Comments
SCLK cycle time
SCLK high time
SCLK low time
SYNC to SCLK falling edge setup time
Data setup time
Data hold time
SCLK falling edge to SYNC rising edge
Minimum SYNC high time
SYNC rising edge to SCLK fall ignore
SCLK falling edge to SYNC fall ignore
LDAC pulse width low
SCLK falling edge to LDAC rising edge
CLR pulse width low
SCLK falling edge to LDAC falling edge
CLR pulse activation time
9
1
t
11
t
12
AD5623R/AD5643R/AD5663R
IL
+ V
IH
)/2.