ad5415 Analog Devices, Inc., ad5415 Datasheet - Page 5

• Manufacturer Part Number: ad5415
• Description: Dual 12-bit, High Bandwidth, Multiplying Dac With 4-quadrant Resistors And Serial Interface
• Manufacturer: Analog Devices, Inc.

TIMING CHARACTERISTICS
All input signals are specified with tr = tf = 1 ns (10% to 90% of V
V
Table 2.
Parameter
f
t
t
t
t
t
t
t
t
t
t
t
t
Update Rate
1
2
3
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
Guaranteed by design and characterization, not subject to production test.
Falling or rising edge as determined by the control bits of the serial word. Strong or weak SDO driver selected via the control register.
Daisy-chain and readback modes cannot operate at maximum clock frequency. SDO timing specifications measured with a load circuit, as shown in Figure 4.
REF
3
= 10 V, I
1
OUT
LDAC
LDAC
1
2
NOTES
ALTERNATIVELY, DATA CAN BE CLOCKED INTO THE INPUT SHIFT REGISTER ON THE RISING EDGE OF SCLK AS
DETERMINED BY THE CONTROL BITS. TIMING IS AS ABOVE, WITH SCLK INVERTED.
SYNC
ASYNCHRONOUS LDAC UPDATE MODE.
SYNCHRONOUS LDAC UPDATE MODE.
SCLK
2 = 0 V, temperature range for Y version: −40°C to +125°C. All specifications T
DIN
Limit at T
50
20
8
8
13
5
4
5
30
0
12
10
25
60
2.47
1
2
t
8
MIN
, T
t
4
MAX
DB15
t
5
Unit
MHz max
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
MSPS
t
6
Figure 2. Standalone Mode Timing Diagram
t
2
Conditions/Comments
Maximum clock frequency
SCLK cycle time
SCLK high time
SCLK low time
SYNC falling edge to SCLK falling edge setup time
Data setup time
Data hold time
SYNC rising edge to SCLK falling edge
Minimum SYNC high time
SCLK falling edge to LDAC falling edge
LDAC pulse width
SCLK falling edge to LDAC rising edge
SCLK active edge to SDO valid, strong SDO driver
SCLK active edge to SDO valid, weak SDO driver
Consists of cycle time, SYNC high time, data setup, and output voltage settling time
Rev. A | Page 5 of 32
t
1
DD
t
3
) and timed from a voltage level of (V
DB0
t
7
t
9
2
t
10
t
11
MIN
to T
MAX
IL
, unless otherwise noted.
+ V
IH
)/2. V
DD
= 2.5 V to 5.5 V,
AD5415