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參數(shù)資料
| 型號(hào)： | MAX518 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs(單通道,串行,電壓輸出,8位D/A轉(zhuǎn)換器) |
| 中文描述： | 2線接口、串行、8位DAC，滿擺幅輸出 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 224K |
| 代理商： | MAX518 |
M
2-Wire S erial 8-Bit DACs with
Rail-to-Rail Outputs
_______________________________________________________________________________________
7
Figure 1. MAX517/MAX519 Functional Diagram
_______________Detailed Desc ription
S erial Interfac e
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 I
2
C 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).
______________________________________________________________Pin Desc ription
PIN
MAX517
1
2
—
3
4
—
5
6
7
—
8
—
—
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
FUNCTION
OUT0
GND
AD3
SCL
SDA
AD2
AD1
AD0
VDD
REF1
REF0
OUT1
N.C.
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.
INPUT
LATCH 0
OUTPUT
LATCH 0
START/STOP
DETECTOR
DAC0
INPUT
LATCH 1
8-BIT
SHIFT
REGISTER
OUT0
REF0
(REF1)
(OUT1)
MAX517/MAX519
DECODE
ADDRESS
COMPARATOR
DAC1
OUTPUT
LATCH 1
V
DD
SCL
AD0
(AD2)
AD1
(AD3)
GND
MAX519 ONLY
( ) ARE FOR MAX519
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