MAX5822 Maxim, MAX5822 Datasheet
MAX5822
Manufacturer Part Number
MAX5822
Description
Dual / 12-Bit / Low-Power / 2-Wire / Serial Voltage-Output DAC
Manufacturer
Maxim
Datasheet
1.MAX5822.pdf
(13 pages)
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The MAX5822 is a dual, 12-bit, voltage-output, digital-to-
analog converter (DAC) with an I
interface that operates at clock rates up to 400kHz. The
device operates from a single 2.7V to 5.5V supply and
draws only 115µA at V
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
circuit that powers up the DAC in the 100kΩ power-down
mode.
The MAX5822 features a double-buffered I
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.
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.
19-2315; Rev 0; 1/02
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
I
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.
2
C is a trademark of Philips Corp.
TOP VIEW
Digital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Powered Instrumentation
®
output buffers and a power-on reset (POR)
GND
ADD
V
SCL
DD
1
2
4
3
________________________________________________________________ Maxim Integrated Products
DD
MAX5822
Dual, 12-Bit, Low-Power, 2-Wire, Serial
General Description
µMAX
= 3.6V. A power-down mode
Pin Configuration
2
C
7
6
5
8
™
Applications
-compatible, 2-wire
OUTB
REF
OUTA
SDA
2
C-compatible
o Ultra-Low Supply Current
o 300nA Low-Power Power-Down Mode
o Single 2.7V to 5.5V Supply Voltage
o Fast 400kHz I
o Schmitt-Trigger Inputs for Direct Interfacing to
o Rail-to-Rail Output Buffer Amplifiers
o Three Software-Selectable Power-Down Output
o Read-Back Mode for Bus and Data Checking
o Power-On Reset to Zero
o 8-Pin µMAX Package
MAX5822LEUA
MAX5822MEUA
Interface
Optocouplers
Impedances
115µA at V
135µA at V
100kΩ, 1kΩ, and High Impedance
PART
SDA
Voltage-Output DAC
µC
SCL
V
DD
Typical Operating Circuit
DD
DD
2
-40
-40
C-Compatible 2-Wire Serial
= 3.6V
= 5.5V
o
o
RANGE
C to +85
C to +85
TEMP
R
R
R
R
Ordering Information
S
S
S
S
R
P
REF
o
o
C
C
R
SDA
REF
SCL
SDA
REF
P
SCL
PIN-
PACKAGE
8 µMAX
8 µMAX
MAX5822
MAX5822
OUTB
OUTB
OUTA
OUTA
Features
V
V
DD
DD
ADDRESS
0111 00X
1011 00X
V
DD
1
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