MAX5822MEUA Maxim Integrated, MAX5822MEUA Datasheet

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MAX5822MEUA

Manufacturer Part Number
MAX5822MEUA
Description
Digital to Analog Converters - DAC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX5822MEUA

Number Of Converters
2
Number Of Dac Outputs
2
Resolution
12 bit
Interface Type
Serial (2-Wire, I2C)
Settling Time
12 us
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
UMAX
Minimum Operating Temperature
- 40 C
Output Type
Voltage
Supply Voltage - Max
5.5 V
Supply Voltage - Min
2.7 V
Voltage Reference
External

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX5822MEUA+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
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: 100k , 1k , 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 100k 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
sheet for the 10-bit version and the MAX5820 data sheet
for the 8-bit version.
19-2315; Rev 1; 3/05
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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.
TOP VIEW
Digital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Powered Instrumentation
GND
ADD
SCL
V
DD
®
1
2
4
________________________________________________________________ Maxim Integrated Products
3
package. Refer to the MAX5821 data
DD
MAX5822
Dual, 12-Bit, Low-Power, 2-Wire, Serial
General Description
MAX
= 3.6V. A power-down mode
Pin Configuration
2
8
7
6
5
C-compatible, 2-wire
Applications
OUTB
REF
OUTA
SDA
2
C-compatible
♦ Ultra-Low Supply Current
♦ 300nA Low-Power Power-Down Mode
♦ Single 2.7V to 5.5V Supply Voltage
♦ Fast 400kHz I
♦ Schmitt-Trigger Inputs for Direct Interfacing to
♦ Rail-to-Rail Output Buffer Amplifiers
♦ Three Software-Selectable Power-Down Output
♦ Read-Back Mode for Bus and Data Checking
♦ Power-On Reset to Zero
♦ 8-Pin µMAX Package
MAX5822LEUA
MAX5822MEUA
Interface
Optocouplers
Impedances
115µA at V
135µA at V
100k , 1k , and High Impedance
PART
SDA
Voltage-Output DAC
C
SCL
V
DD
Typical Operating Circuit
DD
DD
2
C-Compatible 2-Wire Serial
-40
-40
= 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
P
SCL
SDA
REF
SCL
SDA
REF
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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MAX5822MEUA Summary of contents

Page 1

... Rail-to-Rail Output Buffer Amplifiers ♦ Three Software-Selectable Power-Down Output Impedances 100k , 1k , and High Impedance ♦ Read-Back Mode for Bus and Data Checking ♦ Power-On Reset to Zero ♦ 8-Pin µMAX Package PART Applications MAX5822LEUA MAX5822MEUA SDA 8 OUTB 7 OUTA 6 REF 5 SDA Voltage-Output DAC = 3 ...

Page 2

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC ABSOLUTE MAXIMUM RATINGS V , SCL, SDA to GND ............................................-0.3V to +6V DD OUT_, REF, ADD to GND..............................-0. Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (T = +70°C) A 8-Pin ...

Page 3

Dual, 12-Bit, Low-Power, 2-Wire, Serial ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V, GND = REF +5V +25°C.) (Note PARAMETER SYMBOL Input Hysteresis Input Leakage Current Input Capacitance DIGITAL ...

Page 4

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V, GND = REF +5V +25°C.) (Note PARAMETER SYMBOL STOP Condition Setup Time t SU ...

Page 5

Dual, 12-Bit, Low-Power, 2-Wire, Serial (V = +5V +25°C ZERO-CODE ERROR vs. SUPPLY VOLTAGE LOAD 0 2.7 3.4 4.1 4.8 5.5 SUPPLY VOLTAGE (V) GAIN ...

Page 6

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC (V = +5V +25°C POWER-DOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE 500 Z = HIGH IMPEDANCE OUT NO LOAD 400 300 T = -40 C ...

Page 7

Dual, 12-Bit, Low-Power, 2-Wire, Serial PIN NAME 1 V Power Supply DD 2 GND Ground 3 ADD Address Select. A logic high sets the address LSB logic low sets the address LSB SCL Serial ...

Page 8

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC Table 1. Power-Down Command Bits POWER-DOWN COMMAND BITS MODE/FUNCTION PD1 PD0 Power-up device. DAC output 0 0 restored to previous value. Power-down mode 0. Power down 0 1 device with output floating. Power-down ...

Page 9

Dual, 12-Bit, Low-Power, 2-Wire, Serial SCL SDA Figure 2. START and STOP Conditions SCL SDA STOP START LEGAL STOP CONDITION SCL SDA START ILLEGAL STOP ILLEGAL EARLY STOP CONDITION Figure 3. Early STOP Conditions Acknowledge Bit (ACK) ...

Page 10

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC MSB MSB MSB MSB Figure 6. Example Write-Command Sequences (Figure 7). Setting bits A ...

Page 11

Dual, 12-Bit, Low-Power, 2-Wire, Serial Table 3. Command Byte Definitions SERIAL DATA INPUT D11 DAC DATA DAC DATA DAC DATA DAC ...

Page 12

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC MSB MSB MSB Figure 8. Example Read Word Data Sequence INPUT REGISTER A INPUT REGISTER B SERIAL ...

Page 13

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2005 Maxim Integrated Products ...

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