MAX550B Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Low-Power, +2.5V to +5.5V, 8-Bit Voltage-Output DAC in μMAX

19-1140; Rev 0; 9/96
Low-Power, +2.5V to +5.5V, 8-Bit
Voltage-Output DAC in µMAX
_______________General Description
The MAX550B serial, 8-bit, voltage-output, digital-to-
analog converter (DAC) operates on a single +2.5V to
+5.5V supply. Its ±1LSB TUE specification is guaran-
teed over temperature. Operating current (supply cur-
rent plus reference current) is typically 75µA with V_DD =
2.5V and less than 1µA in shutdown mode. The refer-
ence input is disconnected from the REF pin during
shutdown.
The serial interface operates at clock rates up to 10MHz
and is compatible with 3-wire SPI™, QSPI™, and
Microwire™ interface standards.
The MAX550B’s ultra-low power consumption and small
µMAX package make it ideal for portable and battery-
powered applications.
________________________Applications
VCXO Control
Comparator Level Settings
GaAs Amp Bias Control
Digital Gain and Offset Control
____________________________Features
o +2.5V to +5.5V Single-Supply Operation
o ±1LSB (max) TUE
o Low 75µA Operating Current (V_DD = +2.5V)
o 1µA Shutdown Mode
o µMAX Package—50% Smaller than 8-Pin SO
o 10MHz, 3-Wire Serial Interface
o Internal Power-On Reset Clears All Registers
to Zero
_______________Ordering Information
PART
MAX550BCPA
MAX550BCUA
MAX550BC/D
MAX550BEPA
MAX550BEUA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 µMAX
Dice*
8 Plastic DIP
8 µMAX
*Dice are specified at T_A = +25°C, DC parameters only.
________________Functional Diagram
V_DD1
V_DD2
__________________Pin Configuration
DIN
SCLK
CS
INPUT 8
SHIFT
REGISTER
DAC
REGISTER
REF
DAC
R-2R LADDER
OUT
MAX550B
GND
TOP VIEW
GND 1
OUT 2
CS 3
DIN 4
MAX550B
8 V_DD1
7 REF
6 VDD2
5 SCLK
DIP/µMAX
SPI and QSPI are registered trademarks of Motorola, Inc.
Microwire is a registered trademark of National Semiconductor Corp.
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