MAX5821LEUA+T Maxim Integrated Products, MAX5821LEUA+T Datasheet

IC DAC 10BIT DL 2WIRE SER 8-UMAX

MAX5821LEUA+T

Manufacturer Part Number
MAX5821LEUA+T
Description
IC DAC 10BIT DL 2WIRE SER 8-UMAX
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5821LEUA+T

Settling Time
4µs
Number Of Bits
10
Data Interface
Serial
Number Of Converters
2
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power Dissipation (max)
-
The MAX5821 is a dual, 10-bit voltage-output, digital-to-
analog converter (DAC) with an I
2-wire interface that operates at clock rates up to 400kHz.
The device operates from a single 2.7V to 5.5V supply
115µA at V
current consumption to less than 1µA. The MAX5821 fea-
tures three software-selectable power-down output
impedances: 100k , 1k , and high impedance. 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 MAX5821 features a double-buffered I
serial interface that allows multiple devices to share a sin-
gle bus. All logic inputs are CMOS-logic compatible and
buffered with Schmitt triggers, allowing direct interfacing
to optocoupled and transformer-isolated interfaces. The
MAX5821 minimizes digital noise feedthrough by discon-
necting the clock (SCL) signal from the rest of the device
when an address mismatch is detected.
The MAX5821 is specified over the extended temperature
range of -40°C to +85°C and is available in a miniature 8-
pin µMAX
for the 12-bit version and the MAX5820 data sheet for the
8-bit version.
19-2316; Rev 1; 2/05
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-Operated Instrumentation
®
DD
package. Refer to the MAX5822 data sheet
= 3.6V. A power-down mode decreases
GND
ADD
SCL
V
DD
________________________________________________________________ Maxim Integrated Products
1
2
4
3
Dual, 10-Bit, Low-Power, 2-Wire, Serial
General Description
MAX5821
MAX
Pin Configuration
Applications
6
8
7
5
2
OUTB
OUTA
REF
SDA
C-compatible,
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
♦ 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
MAX5821LEUA
MAX5821MEUA
Serial Interface
to Optocouplers
Impedances
115µA at V
135µA at V
100k , 1k , and High Impedance
PART
SDA
Voltage-Output DAC
C
SCL
V
Typical Operating Circuit
DD
DD
DD
2
C-Compatible 2-Wire
-40
-40
= 3.6V
= 5.5V
o
o
RANGE
C to +85
C to +85
TEMP
Ordering Information
R
R
R
R
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
MAX5821
MAX5821
OUTB
OUTB
Features
OUTA
OUTA
V
V
DD
DD
ADDRESS
0111 00X
1011 00X
V
DD
1

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MAX5821LEUA+T Summary of contents

Page 1

... GND 2 MAX5821 ADD 3 SCL 4 MAX µMax is a registered trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 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. Voltage-Output DAC ♦ Ultra-Low Supply Current 2 C-compatible, 115µ 135µ ...

Page 2

Dual, 10-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, 10-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, 10-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 ...

Page 5

Dual, 10-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 SUPPLY VOLTAGE (V) GAIN ERROR ...

Page 6

Dual, 10-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, 10-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 to zero. 4 SCL Serial ...

Page 8

Dual, 10-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, 10-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, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC MSB MSB MSB MSB EXAMPLE-WRITE TO POWER-DOWN REGISTER SEQUENCE Figure 6. Example-Write Command ...

Page 11

Dual, 10-Bit, Low-Power, 2-Wire, Serial Table 3. Command Byte Definitions SERIAL DATA INPUT DAC DATA DAC DATA DAC DATA DAC ...

Page 12

Dual, 10-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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