Datasheet

MAX520/MAX521
Quad/Octal, 2-Wire Serial 8-Bit DACs
with Rail-to-Rail Outputs
_______________________________________________________________________________________ 7
12
0
-60 -20 60 140
MAX521
SUPPLY CURRENT vs. TEMPERATURE
2
8
10
MAX520/521-08
TEMPERATURE (°C)
I
CC
(mA)
20 100
6
4
V
DD
= 5.5V
ALL REF INPUTS = 0.6V
ALL DIGITAL INPUTS to V
DD
ALL DAC CODES FF HEX
ALL DAC CODES 00 HEX
6
0
-60 -20 60 140
MAX521 
SHUTDOWN SUPPLY CURRENT 
vs. TEMPERATURE
1
4
5
MAX520/521-09
TEMPERATURE (°C)
SHUTDOWN I
CC
(µA)
20 100
3
2
V
DD
= 5.5V
ALL REF INPUTS = 0.6V
ALL DIGITAL INPUTS to V
DD

10
0
01 3 5
MAX521 
SUPPLY CURRENT
vs. REFERENCE VOLTAGE
2
6
8
MAX520/521-10
REFERENCE VOLTAGE (V)
I
CC
(mA)
24
4
ALL REFERENCE
INPUTS DRIVEN
ALL DAC CODES = FF HEX
ALL DAC CODES = 00 HEX
1.0
0
02 6 10121416
MAX521
DAC OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
0.2
0.8
MAX520/521-11
OUTPUT SOURCE CURRENT (mA)
V
DD
- V
OUT
(V)
48
0.6
0.4
V
REF
= 5V
DAC CODE = FF HEX
LOAD to AGND
V
OUT
= V
REF
x (255/256)
1.0
0
02 6 10
MAX521
DAC OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
0.2
0.8
MAX520/521-12
OUTPUT SINK CURRENT (mA)
V
OUT
(V)
48
0.6
0.4
V
REF
= 5V
DAC CODE = 00 HEX
LOAD to V
DD
0
1k 100k10k 1M 10M
MAX521
REFERENCE VOLTAGE INPUT
FREQUENCY RESPONSE
-16
-18
MAX520/521-13
FREQUENCY (Hz)
RELATIVE OUTPUT (dB)
-14
-12
-10
-8
-6
-4
-2
2
V
REF
= SINE WAVE
CENTERED AT 2.5V
4V
p-p
SINE
2V
p-p
SINE
1V
p-p
SINE
0.5V
p-p
SINE
__________________________________________Typical Operating Characteristics
(V
DD
= 5V, DAC outputs unloaded, T
A
= +25°C, unless otherwise noted.)
OUT1 LOADED WITH 10kΩ II 100pF, REF1 = 4V,
DAC CODE = 00 HEX to FF HEX
1µs/div
MAX521
POSITIVE SETTLING TIME
OUT1
1V/div

OUT1 LOADED WITH 10kΩ II 100pF, REF1 = 4V,
DAC CODE = FF HEX to 00 HEX
1µs/div
MAX521
NEGATIVE SETTLING TIME
OUT1
1V/div
