Datasheet

MAX548A/MAX549A/MAX550A
+2.5V to +5.5V, Low-Power, Single/Dual,
8-Bit Voltage-Output DACs in µMAX Package
_______________________________________________________________________________________ 5
OUTPUT GLITCH FILTERING
OUT, 50mV/div, C
L
= 0pF
OUT, 50mV/div, C
L
= 100pF
OUT, 50mV/div, C
L
= 220pF
5µs/div
OUT, 50mV/div, C
L
= 1000pF
MAX548A-550A TOC-07
CS, 5V/div
CODE = 00 hex
_____________________________Typical Operating Characteristics (continued)
(V
DD
= V
REF
= 2.5V, R
L
= 1MΩ, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
SETTLING TIME (RISING)
OUT, 1V/div
2µs/div
MAX548A-550A TOC-08
CS, 5V/div
DAC CODE 00 hex to FF hex
______________________________________________________________Pin Description
Ground11 1 GND
DAC A Output Voltage22 — OUTA
Chip-Select Input. A logic low on CS enables serial data to be
clocked into the input shift register. Programming commands are
executed at CS’s rising edge.
33 3
CS
DAC Output Voltage—— 2 OUT
Serial-Clock Input. Data is clocked in on SCLK’s rising edge.55 5 SCLK
DAC B Output Voltage67 — OUTB
Load DAC Input. After CS goes high and if programmed by the
control word, a falling edge on LDAC updates the DAC latch(es).
Connect LDAC to V
DD
if unused.
—6 6
LDAC
Serial-Data Input. Data is clocked into the 16-bit input shift register on
SCLK’s rising edge.
44 4 DIN
Positive Power Supply (+2.5V to +5.5V)88 8 V
DD
External Reference Voltage Input for DAC(s)7— 7 REF
MAX548A MAX549A MAX550A
NAME FUNCTION
PIN