max5477eud Maxim Integrated Products, Inc., max5477eud Datasheet - Page 4

• Manufacturer Part Number: max5477eud
• Description: Dual, 256-tap, Nonvolatile, I2c-interface, Digital Potentiometers
• Manufacturer: Maxim Integrated Products, Inc.

TIMING CHARACTERISTICS (continued)
(V
T
Dual, 256-Tap, Nonvolatile, I
Digital Potentiometers
4
Note 1: All devices are production tested at T
Note 2: The DNL and INL are measured with the potentiometer configured as a voltage-divider with H_ = V
Note 3: The DNL and INL are measured with the potentiometer configured as a variable resistor. H_ is unconnected and L_ =
Note 4: The wiper resistance is measured using the source currents given in Note 3.
Note 5: The devices draw current in excess of the specified supply current when the digital inputs are driven with voltages between
Note 6: Wiper at midscale with a 10pF load (DC measurement). L_ = GND, an AC source is applied to H_, and the W_ output is
Note 7: The programming current exists only during power-up and EEPROM writes.
Note 8: The SCL clock period includes rise and fall times (t
Note 9: Digital timing is guaranteed by design and characterization, and is not production tested.
Note 10: This is measured from the STOP pulse to the time it takes the output to reach 50% of the output step size (divider mode). It
Note 11: An appropriate bus pullup resistance must be selected depending on board capacitance. Refer to the I
Note 12: The idle time begins from the initiation of the STOP pulse.
A
SCL High Time
SCL Low Time
Data Setup Time
Data Hold Time
SDA, SCL Rise Time
SDA, SCL Fall Time
Setup Time for STOP Condition
Bus Free Time Between STOP
and START Condition
Pulse Width of Spike Suppressed
Capacitive Load for Each Bus
Line
Write NV Register Busy Time
DD
= +25°C. See Figure 1.) (Notes 8 and 9)
_______________________________________________________________________________________
= +2.7V to +5.25V, H_ = V
wiper terminal is unloaded and measured with a high-input-impedance voltmeter.
GND. For V
the wiper is driven with 200µA (MAX5477), 40µA (MAX5478), or 20µA (MAX5479).
(V
measured. A 3dB bandwidth occurs when the AC W_/H_ value is 3dB lower than the DC W_/H_ value.
timed from a voltage level of (V
is measured with a maximum external capacitive load of 10pF.
tion document linked to this web address: www.semiconductors.philips.com/acrobat/literature/9398/39340011.pdf
PARAMETER
DD
- 0.5V) and (GND + 0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics .
DD
= +5V, the wiper is driven with 400µA (MAX5477), 80µA (MAX5478), or 40µA (MAX5479). For V
DD
, L_ = GND, T
SYMBOL
t
t
t
HD:DAT
SU:DAT
SU:STO
t
t
HIGH
t
LOW
BUF
t
C
IL
t
t
SP
R
F
B
+ V
A
IH
= +25°C and are guaranteed by design and characterization for -40°C < T
) / 2.
Minimum power-up rate = 0.2V/µs
(Note 11)
(Note 12)
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
R
CONDITIONS
= t
F
). All digital input signals are specified with t
2
C-Interface,
MIN
100
0.6
1.3
0.6
1.3
0
TYP
DD
and L_ = GND. The
R
2
MAX
C-bus specifica-
300
300
400
0.9
50
12
= t
F
A
= 2ns and
DD
DD
< +85°C.
UNITS
= +5V,
= +3V,
ms
pF
µs
µs
ns
µs
ns
ns
µs
µs
ns