MAX521ACAG 데이터 시트보기 (PDF) - Maxim Integrated
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MAX521ACAG Datasheet PDF : 20 Pages
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Quad/Octal, 2-Wire Serial 8-Bit DACs
with Rail-to-Rail Outputs
TIMING CHARACTERISTICS
(VDD = 5V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
Serial Clock Frequency
fSCL
0
Bus Free Time Between a STOP and a
START Condition
tBUF
1.3
Hold Time, (Repeated) Start Condition
Low Period of the SCL Clock
High Period of the SCL Clock
Setup Time for a Repeated START Condition
Data Hold Time
Data Setup Time
Rise Time of Both SDA and SCL Signals, Receiving
Fall Time of Both SDA and SCL Signals, Receiving
Fall Time of SDA Transmitting (Note 6)
Setup Time for STOP Condition
Capacitive Load for Each Bus Line
tHD, STA
tLOW
tHIGH
tSU, STA
tHD, DAT
tSU, DAT
tR
tF
tF
tSU, STO
Cb
(Note 8)
(Note 9)
(Note 9)
ISINK ≤ 6mA (Note 9)
0.6
1.3
0.6
0.6
0
100
20 + 0.1Cb
20 + 0.1Cb
20 + 0.1Cb
0.6
Pulse Width of Spike Suppressed
tSP
(Notes 10, 11)
0
MAX
400
0.9
300
300
250
400
50
UNITS
kHz
µs
µs
µs
µs
µs
µs
ns
ns
ns
ns
µs
pF
ns
Note 8: A master device must provide a hold time of at least 300ns for the SDA signal (referred to VIL of the SCL signal) in order to
bridge the undefined region of SCL’s falling edge.
Note 9: Cb = total capacitance of one bus line in pF. tR and tf measured between 0.3VDD and 0.7VDD.
Note 10: An input filter on the SDA and SCL input suppresses noise spikes less than 50ns.
Note 11: Guaranteed by design.
__________________________________________Typical Operating Characteristics
(VDD = 5V, DAC outputs unloaded, TA = +25°C, unless otherwise noted.)
MAX520
SUPPLY CURRENT vs. TEMPERATURE
10
9 OPERATING MODE OR
8 SHUTDOWN MODE
7
6
5
4
3
2
1
0
-60 -30
0 30 60 90 120 150
TEMPERATURE (°C)
MAX520
REFERENCE INPUT CURRENT vs.
TEMPERATURE (SHUTDOWN MODE)
40
35
VREF = 4V
ONE REF INPUT DRIVEN
30
25
20
15
10
5
0
-60 -30
0 30 60 90 120 150
TEMPERATURE (°C)
MAX520
REFERENCE VOLTAGE INPUT
FREQUENCY RESPONSE
2
0
-2 VDD = 5V
-4
VREF = 4Vp-p SINE WAVE
CENTERED AT 2.5V
-6
-8
-10
-12
-14
-16
-18
1k
10k
100k
1M
10M
FREQUENCY (Hz)
_______________________________________________________________________________________ 5
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