ad5227 Analog Devices, Inc., ad5227 Datasheet - Page 4

• Manufacturer Part Number: ad5227
• Description: 64-position Up/down Control Digital Potentiometer
• Manufacturer: Analog Devices, Inc.

AD5227
Parameter
INTERFACE TIMING CHARACTERISTICS (applies to all parts
1
2
3
4
5
6
7
8
9
10
INTERFACE TIMING DIAGRAMS
positions. R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic.
bandwidth. The highest R value results in the minimum overall power consumption.
V
Typicals represent average readings at 25°C, V
Resistor position nonlinearity error, R-INL, is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper
NL and DNL are measured at V
DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions.
Resistor Terminals A, B, W have no limitations on polarity with respect to each other.
Guaranteed by design and not subject to production test.
P
Bandwidth, noise, and settling time are dependent on the terminal resistance value chosen. The lowest R value results in the fastest settling time and highest
All dynamic characteristics use V
All input control voltages are specified with t
DD
DISS
Clock Frequency
Input Clock Pulse Width
CS to CLK Setup Time
CS Rise to CLK Hold Time
U/D to Clock Fall Setup Time
= 5 V.
is calculated from (I
DD
× V
DD
W
). CMOS logic level inputs result in minimum power dissipation.
with the RDAC configured as a potentiometer divider similar to a voltage output D/A converter. V
DD
= V.
R
R
CLK
DD
U/D
CS = LOW
U/D = HIGH
= t
CS = LOW
U/D = 0
R
CLK
CS
WB
CLK
R
WB
= 5 V.
WB
F
Figure 4. Detailed Timing Diagram(Only R
1
0
1
0
1
0
= 1 ns (10% to 90% of V
t
t
UDS
CSS
Symbol
f
t
t
t
t
CLK
CH
CSS
CSH
UDS
, t
CL
t
CL
t
S
6, 10
Figure 3. Decrement R
Figure 2. Increment R
)
Rev. 0 | Page 4 of 16
t
CH
DD
) and timed from a voltage level of 1.6 V. Switching characteristics are measured using
Conditions
Clock level high or low
WB
WB
WB
Decrement Shown)
t
CSH
Min
10
10
10
10
Typ
A
= V
1
DD
50
and V
Max
B
= 0 V.
Unit
MHz
ns
ns
ns
ns