Rainbow-electronics MAX5362 Bedienungsanleitung PDF herunterladen (Seite 11)

C Compatibility

The MAX5360/MAX5361/MAX5362 are compatible with

existing I

C systems. SCL and SDA are high-imped-

ance inputs; SDA has an open drain that pulls the data

line low during the 9th clock pulse. Figure 7 shows a

typical I

C application. The communication protocol

supports the standard I

C 8-bit communications. The

general call address is ignored, and CBUS formats are

not supported. The MAX5360/MAX5361/MAX5362

address is compatible with the 7-bit I

C addressing

protocol only. No 10-bit formats are supported.

RESTART protocol is supported, but an immediate

STOP condition is necessary to update the DAC.

Applications Information

Digital Inputs and Interface Logic

The serial 2-wire interface has logic levels defined as

= 0.3

and V

= 0.7

. All of the inputs

include Schmitt-trigger buffers to accept slow-transition

interfaces. This means that optocouplers can interface

directly to the MAX5360/MAX5361/MAX5362 without

additional external logic. The digital inputs are compati-

ble with CMOS logic levels and must not be driven with

voltages higher than V

Power-Supply Bypassing and Layout

Careful PC board layout is important for best system

performance. To reduce crosstalk and noise injection,

keep analog and digital signals separate. Ensure that

the ground return from GND to the supply ground is

short and low impedance; a ground plane is recom-

mended. Bypass V

with a 0.1µF to ground as close

as possible to the device. If the supply is excessively

noisy, connect a 10Ω resistor in series with the supply

and V

, and add additional capacitance

MAX5360/MAX5361/MAX5362

Low-Cost, Low-Power 6-Bit DACs with

2-Wire Serial Interface in SOT23 Package

______________________________________________________________________________________ 11

µC

SDA SCL

OFFSET ADJUSTMENT

THRESHOLD ADJUSTMENT

GAIN ADJUSTMENT

SCL

SDA

OUT

MAX5360L

2V REFERENCE

SCL

SDA

OUT

MAX5361M

4V REFERENCE

SCL

SDA

OUT

MAX5362P

REFERENCE

Figure 7. I

C Typical Application

TRANSISTOR COUNT: 2910

PROCESS: BiCMOS

Chip Information

1 2 ... 6 7 8 9 10 11 12

MAX5360/MAX5361/MAX5362 1

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