AD8400 Analog Devices, AD8400 Datasheet - Page 5

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AD8400

Manufacturer Part Number
AD8400
Description
Single-channel Digital Potentiometer
Manufacturer
Analog Devices
Datasheet

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SPECIFICATIONS
ELECTRICAL CHARACTERISTICS–ALL VERSIONS
Parameter
SWITCHING CHARACTERISTICS
NOTES
1
2
3
4
Specifications subject to change without notice.
Typicals represent average readings at 25°C and V
Guaranteed by design and not subject to production test. Resistor-terminal capacitance tests are measured with 2.5 V bias on the measured terminal. The remaining
See timing diagram for location of measured values. All input control voltages are specified with t
Propagation Delay depends on value of V
resistor terminals are left open circuit.
of 1.6 V. Switching characteristics are measured using V
V
CLK
OUT
SDI
Input Clock Pulsewidth
Data Setup Time
Data Hold Time
CLK to SDO Propagation Delay
CS Setup Time
CS High Pulsewidth
Reset Pulsewidth
CLK Fall to CS Rise Hold Time
CS Rise to Clock Rise Setup
CS
V
DD
0V
1
0
1
0
1
0
A1
A0
D7
D6
D5
D4
4
2, 3
DAC REGISTER LOAD
D3
DD
(V
, R
DD
D2
L
= 3 V
, and C
D1
DD
= 5 V.
D0
Symbol
t
t
t
t
t
t
t
t
t
L
CH
DS
DH
PD
CSS
CSW
RS
CSH
CS1
DD
—see Applications section.
10% or 5 V
, t
= 3 V or 5 V. To avoid false clocking, a minimum input logic slew rate of 1 V/ µs should be maintained.
V
CL
OUT
RS
V
DD
V
DD
/2
1
0
Conditions
Clock Level High or Low
R
10%, V
L
= 1 kΩ to 5 V, C
1% ERROR BAND
A
t
RS
= V
(DATA OUT)
t
S
DD
(DATA IN)
, V
B
V
SDO
CLK
L
OUT
= 0 V, –40 C ≤ T
SDI
CS
≤ 20 pF
R
V
0V
DD
= t
1
0
1
0
1
0
1
0
1%
F
= 1 ns (10% to 90% of V
Ax OR Dx
A'x OR D'x
t
PD_MIN
t
CSS
A
t
≤ +125 C unless otherwise noted.)
CH
AD8400/AD8402/AD8403
A'x OR D'x
Ax OR Dx
t
DS
Min
10
5
5
1
10
10
50
0
10
t
CL
DD
t
) and timed from a voltage level
DH
Typ
t
CSH
1% ERROR BAND
1
t
PD_MAX
t
CS1
Max
25
t
S
t
CSW
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
1 %

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