MAX549ACPA+ Maxim Integrated Products, MAX549ACPA+ Datasheet

IC DAC 8BIT DUAL 2.5V 8-DIP

MAX549ACPA+

Manufacturer Part Number
MAX549ACPA+
Description
IC DAC 8BIT DUAL 2.5V 8-DIP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX549ACPA+

Settling Time
4µs
Number Of Bits
8
Data Interface
Serial
Number Of Converters
2
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Number Of Dac Outputs
2
Resolution
8 bit
Interface Type
Serial (SPI)
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
Through Hole
Minimum Operating Temperature
0 C
Supply Current
0.55 mA
Voltage Reference
External
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power Dissipation (max)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX548A/MAX549A/MAX550A serial, 8-bit voltage-
output digital-to-analog converters (DACs) operate from
a single +2.5V to +5.5V supply. Their ±1LSB TUE spec-
ification is guaranteed over temperature. Operating cur-
rent (supply current plus reference current) is typically
75µA per DAC with V
is disconnected from the reference, reducing current
drain to less than 1µA. The MAX548A/MAX549A allow
each DAC to be shut down independently.
The 10MHz, 3-wire serial interface is compatible with
SPI™/QSPI™ and Microwire™ interface standards.
Double-buffered inputs provide flexibility when updat-
ing the DACs; the input and DAC registers can be
updated individually or simultaneously.
The MAX548A is a dual DAC with an asynchronous
load input; it uses V
MAX549A is a dual DAC with an external reference
input. The MAX550A is a single DAC with an external
reference input and an asynchronous load input.
The MAX548A/MAX549A/MAX550A’s low power con-
sumption and small µMAX and DIP packages make
these devices ideal for portable and battery-powered
applications.
________________________Applications
19-1206; Rev 0; 3/97
SPI and QSPI are trademarks of Motorola Inc.
Microwire is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
_____________________Selector Guide
_______________General Description
Number of DACs
DAC Reference
Asynchronous
Load DAC Input
µMAX Package
FEATURE
8-Bit Voltage-Output DACs in µMAX Package
Battery-Powered Systems
VCXO Control
Comparator-Level Settings
GaAs Amp Bias Control
Digital Gain and Offset Control
________________________________________________________________ Maxim Integrated Products
+2.5V to +5.5V, Low-Power, Single/Dual,
MAX548A
DD
DD
V
DD
2
= 2.5V. In shutdown, the DAC
as the reference input. The
MAX549A
External
2
MAX550A
External
1
Ordering Information continued at end of data sheet.
* Dice are specified at T
† Contact factory for availability of 8-pin SO package.
____________________________Features
_________________Pin Configurations
______________Ordering Information
MAX548ACPA
MAX548ACUA
MAX548AC/D
MAX548AEPA
MAX548AEUA
+2.5V to +5.5V Single-Supply Operation
±1LSB (max) TUE
Power-On Reset Clears All Registers to Zero
Low Operating Current:
1µA Shutdown Mode
10MHz, 3-Wire Serial Interface Compatible with
SPI/QSPI and Microwire
µMAX Package—50% Smaller than 8-Pin SO
Independent Shutdown of DACs
(MAX548A/MAX549A)
Pin Configurations continued at end of data sheet.
TOP VIEW
150µA (MAX548A/MAX549A, V
75µA (MAX550A, V
PART
OUTA
GND
DIN
CS
1
2
3
4
-40°C to +85°C
-40°C to +85°C
A
TEMP. RANGE
= +25°C, DC parameters only.
0°C to +70°C
0°C to +70°C
0°C to +70°C
DIP/ MAX
REF
MAX548A
= +2.5V)
6
8
7
5
REF
8 Plastic DIP
8 µMAX
Dice*
8 Plastic DIP
8 µMAX
PIN-PACKAGE †
V
OUTB
LDAC
SCLK
DD
= +2.5V)
1

Related parts for MAX549ACPA+

MAX549ACPA+ Summary of contents

Page 1

... Load DAC Input √ µMAX Package SPI and QSPI are trademarks of Motorola Inc. Microwire is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 ____________________________Features +2.5V to +5.5V Single-Supply Operation ±1LSB (max) TUE ...

Page 2

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package ABSOLUTE MAXIMUM RATINGS CS, LDAC, OUT_ to GND ...............-0. SCLK, DIN, DD REF to GND ................................................-0. Maximum Current (any pin) .............................................±50mA Continuous Power ...

Page 3

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package ELECTRICAL CHARACTERISTICS (continued +2.5V to +5.5V MIN MAX PARAMETER SYMBOL DYNAMIC PERFORMANCE Digital Feedthrough and Crosstalk Voltage-Output Settling Time Voltage-Output ...

Page 4

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package __________________________________________Typical Operating Characteristics ( 2.5V 1MΩ 15pF REF L L OPERATING CURRENT PER DAC vs. TEMPERATURE 150.2 149 ...

Page 5

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package _____________________________Typical Operating Characteristics (continued 2.5V 1MΩ 15pF REF L L OUTPUT GLITCH FILTERING CODE = 00 hex 5 s/div ...

Page 6

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package _______________Detailed Description The MAX548A/MAX549A/MAX550A are 8-bit, voltage- output digital-to-analog converters (DACs). The MAX548A/MAX549A are dual DACs, and the MAX550A is a single DAC. Each DAC consists of an R-2R ...

Page 7

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package edge on CS programs the DAC. The input registers can be loaded independently or simultaneously without updating the DAC registers. This allows both DAC reg- isters to be updated ...

Page 8

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package function. Data is clocked in starting with unassigned bit 1 (UB1), followed by the remaining control bits and the DAC data byte. The data byte’s LSB (D0) is the ...

Page 9

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package Table 2. MAX548A Serial-Interface Programming Commands CONTROL BYTE Loaded First UB1 UB2 UB3 UNASSIGNED COMMANDS ...

Page 10

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package Table 2. MAX548A Serial-Interface Programming Commands (continued) COMMANDS FOR POWERING DOWN CONTROL BYTE Loaded First UB1 UB2 UB3 COMMANDS POWERING DOWN AND LOADING INPUT REGISTER(S) ONLY ...

Page 11

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package Table 3. MAX549A Serial-Interface Programming Commands CONTROL BYTE Loaded First UB1 UB2 UB3 UNASSIGNED COMMAND COMMANDS LOADING INPUT REGISTER(S) ONLY ...

Page 12

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package Table 4. MAX550A Serial-Interface Programming Commands CONTROL BYTE Loaded First UB1 UB2 UB3 UNASSIGNED COMMANDS ...

Page 13

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package Microprocessor Interfacing The MAX548A/MAX549A/MAX550A serial interface is SPI/QSPI and Microwire compatible. For SPI/QSPI, clear the CPOL and CPHA bits (CPOL = 0 and CPHA = 0). CPOL = 0 ...

Page 14

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package _________________________________________________________Functional Diagram DIN SCLK INPUT SHIFT CS REGISTER LDAC AND MAX548A/ CONTROL MAX550A ONLY _Ordering Information (continued) PART TEMP. RANGE MAX549ACPA 0°C to +70°C MAX549ACUA 0°C to +70°C MAX549AC/D ...

Page 15

Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package ________________________________________________________Package Information ______________________________________________________________________________________ 15 ...

Page 16

... 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 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1997 Maxim Integrated Products © ...

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