MAX519BCSE データシートの表示（PDF） - Maxim Integrated

部品番号

コンポーネント説明

メーカー

MAX519BCSE

2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs

Maxim Integrated 

2-Wire Serial 8-Bit DACs with

Rail-to-Rail Outputs

______________________________________________________________Pin Description

MAX517

1

2

—

3

4

—

5

6

7

—

8

—

—

PIN

MAX518

1

2

—

3

4

—

5

6

7

—

—

8

—

MAX519

1

4

5

6

8

9

10

11

12

13

15

16

2, 3, 7, 14

NAME

OUT0

GND

AD3

SCL

SDA

AD2

AD1

AD0

VDD

REF1

REF0

OUT1

N.C.

FUNCTION

DAC0 Voltage Output

Ground

Address Input 3; sets IC’s slave address

Serial Clock Input

Serial Data Input

Address Input 2; sets IC’s slave address

Address Input 1; sets IC’s slave address

Address Input 0; sets IC’s slave address

Power Supply, +5V; used as reference for MAX518

Reference Voltage Input for DAC1

Reference Voltage Input for DAC0

DAC1 Voltage Output

No Connect—not internally connected.

VDD

REF0 (REF1)

INPUT

LATCH 0

OUTPUT

LATCH 0

DAC0

OUT0

INPUT

LATCH 1

OUTPUT

LATCH 1

DAC1

(OUT1)

MAX519 ONLY

8-BIT

SHIFT

REGISTER

ADDRESS

COMPARATOR

SCL

SDA

DECODE

START/STOP

DETECTOR

MAX517/MAX519

AD0 (AD2)

GND

AD1 (AD3)

( ) ARE FOR MAX519

Figure 1. MAX517/MAX519 Functional Diagram

_______________Detailed Description

Serial Interface

The MAX517/MAX518/MAX519 use a simple 2-wire

serial interface requiring only two I/O lines (2-wire bus)

of a standard microprocessor (µP) port. Figure 2 shows

the timing diagram for signals on the 2-wire bus.

Figure 3 shows a typical application. The 2-wire bus can

have several devices (in addition to the MAX517/

MAX518/MAX519) attached. The two bus lines (SDA and

SCL) must be high when the bus is not in use. When in

use, the port bits are toggled to generate the appropriate

signals for SDA and SCL. External pull-up resistors are

not required on these lines. The MAX517/MAX518/

MAX519 can be used in applications where pull-up resis-

tors are required (such as in I2C systems) to maintain

compatibility with existing circuitry.

The MAX517/MAX518/MAX519 are receive-only devices

and must be controlled by a bus master device. They

operate at SCL rates up to 400kHz. A master device

sends information to the devices by transmitting their

address over the bus and then transmitting the desired

information. Each transmission consists of a START

condition, the MAX517/MAX518/MAX519’s programm-

able slave-address, one or more command-byte/out-

put-byte pairs (or a command byte alone, if it is the last

byte in the transmission), and finally, a STOP condition

(Figure 4).

_______________________________________________________________________________________ 7

Share Link: