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MAX5822MEUA-T

更新时间： 2024-11-09 13:10:39
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美信 - MAXIM /
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19-2315; Rev 0; 1/02  
Dual, 12-Bit, Low-Power, 2-Wire, Serial  
Voltage-Output DAC  
General Description  
Features  
The MAX5822 is a dual, 12-bit, voltage-output, digital-to-  
analog converter (DAC) with an I2C™-compatible, 2-wire  
interface that operates at clock rates up to 400kHz. The  
device operates from a single 2.7V to 5.5V supply and  
o Ultra-Low Supply Current  
115µA at V  
135µA at V  
= 3.6V  
= 5.5V  
DD  
DD  
o 300nA Low-Power Power-Down Mode  
o Single 2.7V to 5.5V Supply Voltage  
draws only 115µA at V  
= 3.6V. A power-down mode  
DD  
decreases current consumption to less than 1µA. The  
MAX5822 features three software-selectable power-  
down output impedances: 100kΩ, 1kΩ, and high imped-  
ance. Other features include internal precision  
Rail-to-Rail® output buffers and a power-on reset (POR)  
circuit that powers up the DAC in the 100kΩ power-down  
mode.  
o Fast 400kHz I2C-Compatible 2-Wire Serial  
Interface  
o Schmitt-Trigger Inputs for Direct Interfacing to  
Optocouplers  
The MAX5822 features a double-buffered I2C-compatible  
serial interface that allows multiple devices to share a  
single bus. All logic inputs are CMOS-logic compatible  
and buffered with Schmitt triggers, allowing direct inter-  
facing to optocoupled and transformer-isolated inter-  
faces. The MAX5822 minimizes digital noise feedthrough  
by disconnecting the clock (SCL) signal from the rest of  
the device when an address mismatch is detected.  
o Rail-to-Rail Output Buffer Amplifiers  
o Three Software-Selectable Power-Down Output  
Impedances  
100kΩ, 1kΩ, and High Impedance  
o Read-Back Mode for Bus and Data Checking  
o Power-On Reset to Zero  
o 8-Pin µMAX Package  
The MAX5822 is specified over the extended tempera-  
ture range of -40°C to +85°C and is available in a minia-  
ture 8-pin µMAX package. Refer to the MAX5821 data  
sheet for the 10-bit version.  
Ordering Information  
TEMP  
RANGE  
PIN-  
PACKAGE  
PART  
ADDRESS  
Applications  
MAX5822LEUA -40oC to +85oC 8 µMAX  
MAX5822MEUA -40oC to +85oC 8 µMAX  
0111 00X  
1011 00X  
Digital Gain and Offset Adjustments  
Programmable Voltage and Current Sources  
Programmable Attenuation  
Typical Operating Circuit  
VCO/Varactor Diode Control  
V
DD  
Low-Cost Instrumentation  
V
DD  
Battery-Powered Instrumentation  
µC  
SCL  
SDA  
R
P
R
P
Pin Configuration  
TOP VIEW  
R
R
S
SCL  
V
DD  
S
V
1
2
3
4
8
7
6
5
OUTB  
OUTA  
REF  
DD  
MAX5822  
OUTA  
OUTB  
SDA  
REF  
GND  
ADD  
SCL  
MAX5822  
R
R
S
SDA  
V
DD  
SCL  
S
MAX5822  
OUTA  
OUTB  
SDA  
REF  
µMAX  
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.  
I2C is a trademark of Philips Corp.  
REF  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...13

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