Typical operating characteristics (continued), Pin description – Rainbow Electronics MAX550A User Manual
Page 5
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
5
µ
s/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
= 1M
Ω
, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
SETTLING TIME (RISING)
OUT, 1V/div
2
µ
s/div
MAX548A-550A TOC-08
CS, 5V/div
DAC CODE 00 hex to FF hex
______________________________________________________________Pin Description
Ground
1
1
1
GND
DAC A Output Voltage
2
2
—
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.
3
3
3
CS
DAC Output Voltage
—
—
2
OUT
Serial-Clock Input. Data is clocked in on SCLK’s rising edge.
5
5
5
SCLK
DAC B Output Voltage
6
7
—
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.
4
4
4
DIN
Positive Power Supply (+2.5V to +5.5V)
8
8
8
V
DD
External Reference Voltage Input for DAC(s)
7
—
7
REF
MAX548A
MAX549A
MAX550A
NAME
FUNCTION
PIN