max5812peut-t Maxim Integrated Products, Inc., max5812peut-t Datasheet

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max5812peut-t

Manufacturer Part Number
max5812peut-t
Description
Max5812 12-bit Low-power, 2-wire, Serial Voltage-output Dac
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
The MAX5812 is a single, 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 100µA at V
down mode decreases current consumption to less than
1µA. The MAX5812 features three software-selectable
power-down output impedances: 100kΩ, 1kΩ, and high
impedance. Other features include an internal precision
Rail-to-Rail
that powers up the DAC in the 100kΩ power-down mode.
The MAX5812 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
MAX5812 minimizes digital noise feedthrough by discon-
necting the clock (SCL) signal from the rest of the device
when an address mismatch is detected.
The MAX5812 is specified over the extended temperature
range of -40°C to +85°C and is available in a space-sav-
ing 6-pin SOT23 package. Refer to the MAX5811 for the
10-bit version.
19-2340; Rev 0; 1/02
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.
Digital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Operated Equipment
SDA
®
output buffer and a power-on reset circuit
µC
Typical Operating Circuit
SCL
V
DD
________________________________________________________________ Maxim Integrated Products
R
P
DD
General Description
R
P
= 3.6V. A low-power power-
R
R
R
R
S
S
S
S
SCL
SDA
SCL
SDA
2
C™-compatible 2-wire
Applications
MAX5812
MAX5812
12-Bit Low-Power, 2-Wire, Serial
OUT
OUT
V
V
DD
DD
2
C-compatible
V
DD
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 Amplifier
o Three Software-Selectable Power-Down Output
o Read-Back Mode for Bus and Data Checking
o Power-On Reset to Zero
o Miniature 6-Pin SOT23 Package
Selector Guide appears at end of data sheet.
Functional Diagram appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
I
MAX5812LEUT
MAX5812MEUT
MAX5812NEUT
MAX5812PEUT
2
C is a trademark of Philips Corporation.
Interface
Optocouplers
Impedances
TOP VIEW
100µA at V
130µA at V
100kΩ, 1kΩ, and High Impedance
PART
Voltage-Output DAC
GND
SDA
V
DD
DD
DD
2
C-Compatible 2-Wire Serial
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
1
2
3
= 3.6V
= 5.5V
Ordering Information
MAX5812
SOT23
Pin Configuration
PIN-
PACKAGE
6 SOT23
6 SOT23
6 SOT23
6 SOT23
6
5
4
OUT
ADD
SCL
Features
MARK
AAYT
AAYV
AAYX
AAYZ
TOP
1

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max5812peut-t Summary of contents

Page 1

... Read-Back Mode for Bus and Data Checking o Power-On Reset to Zero o Miniature 6-Pin SOT23 Package Applications PART MAX5812LEUT MAX5812MEUT MAX5812NEUT MAX5812PEUT Selector Guide appears at end of data sheet. Functional Diagram appears at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd trademark of Philips Corporation. V ...

Page 2

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

Page 3

ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V, GND = +5V +25°C.) (Note PARAMETER SYMBOL Digital Feedthrough Digital-to-Analog Glitch Impulse POWER SUPPLIES Supply Voltage Range Supply Current with No Load ...

Page 4

Low-Power, 2-Wire, Serial Voltage-Output DAC (V = +5V 5kΩ +25°C INTEGRAL NONLINEARITY vs. INPUT CODE 1024 2048 3072 4096 INPUT CODE DIFFERENTIAL ...

Page 5

R = 5kΩ +25°C GAIN ERROR vs. TEMPERATURE -2.0 -1.6 -1.2 -0.8 -0.4 NO LOAD 0 -40 - TEMPERATURE (°C) SUPPLY CURRENT vs. INPUT CODE 120 100 80 60 ...

Page 6

Low-Power, 2-Wire, Serial Voltage-Output DAC (V = +5V 5kΩ +25°C MAJOR CARRY TRANSITION (POSITIVE) MAX5812 toc19 OUT 5mV/div 2µs/div C = 200pF CODE = 7FF hex TO 800 hex LOAD R = ...

Page 7

PIN NAME 1 V Power Supply and DAC Reference Input DD 2 GND Ground 3 SDA Bidirectional Serial Data I/O 4 SCL Serial Clock Line 5 ADD Address Select. A logic high sets the address LSB logic ...

Page 8

Low-Power, 2-Wire, Serial Voltage-Output DAC SDA t SU, DAT t LOW SCL t HIGH t HD, STA START CONDITION Figure 1. Two-Wire Serial lnterface Timing Diagram and a serial clock line (SCL). The MAX5812 is ...

Page 9

SDA with SCL high. A STOP condition is a low-to-high transition on SDA while SCL is high (Figure 2). A START condition from the master signals the beginning of a transmission to the MAX5812. The master terminates ...

Page 10

Low-Power, 2-Wire, Serial Voltage-Output DAC Table 3. Command Byte Definitions SERIAL DATA INPUT D11/PD1* DAC DATA DAC DATA DAC DATA ...

Page 11

MSB MSB MSB Figure 7. Example Read Word Data Sequence IN OUT MAX6030/ MAX6050 GND Figure 8. Powering the MAX5812 from An External Reference ...

Page 12

... GND to the power supply ground is short and low impedance. Bypass V with a 0.1µF capacitor to DD ground as close to the device as possible. Selector Guide PART MAX5812LEUT MAX5812MEUT MAX5812NEUT MAX5812PEUT 12 ______________________________________________________________________________________ V DD MUX AND DAC 12-BIT REGISTER DAC POWER-DOWN CIRCUITRY ...

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 ...

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