MAX5417LETA-T Datasheet, PDF (8/14 Pages) Maxim Integrated Products – 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers

256-Tap, Nonvolatile, I²C-Interface,
Digital Potentiometers
Pin Description
PIN
NAME
FUNCTION
1
V_DD Power-Supply Input. 2.7V to 5.25V voltage range. Bypass with a 0.1µF capacitor from V_DD to GND.
2
SCL I²C-Interface Clock Input
3
SDA I²C-Interface Data Input
4
A₀
Address Input. Sets the A0 bit in the device ID address.
5
GND Ground
6
L
Low Terminal
7
W
Wiper Terminal
8
H
High Terminal
—
EP
Exposed Pad. Internally connected to GND. Connect to a large ground plane to maximize thermal
performance. Not intended as an electrical point.
SDA
t_SU-DAT
t_LOW
SCL
t_HD-STA
t_HIGH
t_R
t_F
S
PARAMETERS ARE MEASURED FROM 30% TO 70%.
t_HD-DAT
t_SU-STA
t_HD-STA
Sr
A
t_R
t_F
t_BUF
t_SU-STO
P
S
Figure 1. I²C Serial-Interface Timing Diagram
V_DD
I_OL = 3mA
SDA
V_OUT
400pF
I_OH = 0mA
Figure 2. Load Circuit
Detailed Description
The MAX5417/MAX5418/MAX5419 contain a resistor
array with 255 resistive elements. The MAX5417 has a
total end-to-end resistance of 50kΩ, the MAX5418 has
an end-to-end resistance of 100kΩ, and the MAX5419
has an end-to-end resistance of 200kΩ. The
MAX5417/MAX5418/MAX5419 allow access to the high,
low, and wiper terminals for a standard voltage-divider
configuration. H, L, and W can be connected in any
desired configuration as long as their voltages fall
between GND and V_DD.
A simple 2-wire I²C-compatible serial interface moves
the wiper among the 256 tap points. A nonvolatile mem-
ory stores the wiper position and recalls the stored wiper
position in the nonvolatile memory upon power-up. The
nonvolatile memory is guaranteed for 50 years for wiper
data retention and up to 200,000 wiper store cycles.
8 _______________________________________________________________________________________