Rainbow-electronics MAX5419 Manual de usuario descargar pdf (Pagina 7)

MAX5417/MAX5418/MAX5419

256-Tap, Nonvolatile, I

C-Interface,

Digital Potentiometers

_______________________________________________________________________________________ 7

Pin Description

PIN NAME FUNCTION

Power-Supply Input. 2.7V to 5.25V voltage range. Bypass with a 0.1µF capacitor from V

to GND.

2 SCL I

C-Interface Clock Input

3 SDA I

C-Interface Data Input

4A0Address Input. Sets the A0 bit in the device ID address.

5 GND Ground

6LLow Terminal

7WWiper Terminal

8HHigh Terminal

—EPExposed Pad

HD-STA

SU-DAT

HIGH

HD-DAT

HD-STA

S Sr A

SU-STA

LOW

BUF

SU-STO

SCL

SDA

PARAMETERS ARE MEASURED FROM 30% TO 70%.

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

A simple 2-wire I

C-compatible serial interface moves

the wiper among the 256 tap points. A nonvolatile

memory stores and recalls the stored wiper position in

the nonvolatile memory upon power-up. The nonvolatile

memory is guaranteed for 200,000 wiper store cycles

and 50 years for wiper data retention.

Figure 1. I

C Serial-Interface Timing Diagram

= 3mA

= 0mA

OUT

400pF

SDA

Figure 2. Load Circuit

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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Rainbow-electronics MAX5419 Manual de usuario Pagina 7

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