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MAX520BEWE-T

更新时间： 2024-11-05 13:10:39
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MAX520BEWE-T 数据手册

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19-0378; Rev 3; 9/96  
Qu a d /Oc t a l, 2 -Wire S e ria l 8 -Bit DACs  
w it h Ra il-t o -Ra il Ou t p u t s  
0/MAX521  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
♦ Single +5V Supply  
The MAX520/MAX521 are quad/octal, 8-bit voltage-output  
digital-to-analog converters (DACs) with simple 2-wire ser-  
ial interfaces that allow communication between multiple  
devices. They operate from a single +5V supply and their  
reference input range includes both supply rails.  
♦ Simple 2-Wire Serial Interface  
♦ I2C Compatible  
♦ Outputs Swing Rail to Rail:  
Unbuffered Outputs (MAX520)  
Buffered Outputs (MAX521)  
The MAX521 includes rail-to-rail output buffer amplifiers for  
reduced system size and component count when driving  
loads. The MAX520’s unbuffered voltage outputs reduce  
the device’s total supply current to 4µA and provide  
increased accuracy at low output currents.  
♦ 1%-Accurate Trimmed Output Resistance (MAX520A)  
♦ Ultra-Low 4µA Supply Current (MAX520)  
♦ Individual DACs Have Separate Reference Inputs  
♦ Power-On Reset Clears All Latches  
The MAX520/MAX521 feature a serial interface and internal  
software protocol, allowing communication at data rates up  
to 400kbps. The interface, combined with the double-  
buffered input configuration, allows the DAC registers to be  
updated individually or simultaneously. In addition, the  
devices can be put into a low-power shutdown mode that  
reduces supply current to 4µA. Power-on reset ensures the  
DAC outputs are at 0V when power is initially applied.  
♦ 4µA Power-Down Mode  
______________Ord e rin g In fo rm a t io n  
TUE  
(LSB)  
PART†  
TEMP. RANGE PIN-PACKAGE  
The MAX520 is available in 16-pin DIP and wide SO pack-  
a ge s, a s we ll a s a spa c e -sa ving 20-p in SSOP. The  
MAX521 comes in 20-pin DIP and 24-pin SO packages, as  
well as a space-saving 24-pin SSOP.  
MAX520ACPE  
MAX520BCPE  
MAX520ACWE  
MAX520BCWE  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
16 Plastic DIP  
16 Plastic DIP  
16 Wide SO  
16 Wide SO  
1
1
1
1
________________________Ap p lic a t io n s  
Minimum Component Analog Systems  
Digital Offset/Gain Adjustment  
Ordering Information continued at end of data sheet.  
MAX520 “A” grade parts include a 1%-accurate, factory-trimmed  
output resistance.  
†
Industrial Process Control  
Automatic Test Equipment  
_______________Fu n c t io n a l Dia g ra m s  
Programmable Attenuators  
SDA SCL  
REF1  
REF0  
_________________P in Co n fig u ra t io n s  
OUTPUT  
LATCH 0  
INPUT  
LATCH 0  
OUT0  
OUT1  
DAC0  
MAX520  
1
TOP VIEW  
8
8-BIT  
SHIFT REGISTER  
ADDRESS  
COMPARATOR  
OUT1  
OUT0  
REF1  
REF0  
AGND  
DGND  
SCL  
1
2
3
4
5
6
7
8
16 OUT2  
15 OUT3  
14 REF2  
INPUT  
LATCH 1  
OUTPUT  
LATCH 1  
DAC1  
START/STOP  
DETECTOR  
1
REF3  
13  
MAX520  
OUTPUT  
LATCH 2  
INPUT  
LATCH 2  
OUT2  
OUT3  
DAC2  
DAC3  
V
12  
11  
10  
9
DD  
DECODE  
1
AD2  
AD1  
AD0  
4
INPUT  
LATCH 3  
OUTPUT  
LATCH 3  
SDA  
1
AD0  
AD2  
REF2  
REF3  
DIP/SO  
AD1  
Functional Diagrams continued at end of data sheet.  
Pin Configurations continued at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800  
1234567...20

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