MAX1220 Ver la hoja de datos (PDF) - Maxim Integrated
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componentes Descripción
fabricante
MAX1220
Maxim Integrated
MAX1220 Datasheet PDF : 43 Pages
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12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD = VDVDD = 2.7V to 3.6V (MAX1257), external reference VREF = 2.5V (MAX1257), VAVDD = 4.75V to 5.25V, VDVDD = 2.7V to VAVDD
(MAX1220/MAX1258), external reference VREF = 4.096V (MAX1220/MAX1258), fCLK = 3.6MHz (50% duty cycle), TA = -40°C to +85°C,
unless otherwise noted. Typical values are at VAVDD = VDVDD = 3V (MAX1257), VAVDD = VDVDD = 5V (MAX1220/MAX1258), TA = +25°C.
Outputs are unloaded, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
TIMING CHARACTERISTICS (Figures 6–13)
SCLK Clock Period
tCP
40
ns
SCLK Pulse-Width High
tCH 40/60 duty cycle
16
ns
SCLK Pulse-Width Low
tCL 60/40 duty cycle
16
ns
GPIO Output Rise/Fall After
CS Rise
tGOD CLOAD = 20pF
100
ns
GPIO Input Setup Before CS
Fall
tGSU
0
ns
LDAC Pulse Width
tLDACPWL
20
SCLK Fall to DOUT Transition
(Note 16)
tDOT
CLOAD = 20pF, SLOW = 0
CLOAD = 20pF, SLOW = 1
1.8
10
SCLK Rise to DOUT Transition
(Notes 16, 17)
tDOT
CLOAD = 20pF, SLOW = 0
CLOAD = 20pF, SLOW = 1
1.8
10
CS Fall to SCLK Fall Setup Time
tCSS
10
SCLK Fall to CS Rise Hold Time
tCSH
0
DIN to SCLK Fall Setup Time
tDS
10
DIN to SCLK Fall Hold Time
tDH
0
CS Pulse-Width High
tCSPWH
50
CS Rise to DOUT Disable
tDOD CLOAD = 20pF
CS Fall to DOUT Enable
tDOE CLOAD = 20pF
1.5
EOC Fall to CS Fall
tRDS
30
CKSEL = 01 (temp sense) or CKSEL =
10 (temp sense), internal reference on
(Note 18)
ns
12.0
ns
40
12.0
ns
40
ns
2000
ns
ns
ns
ns
25
ns
25.0
ns
ns
65
CS or CNVST Rise to EOC
Fall—Internally Clocked
Conversion Time
tDOV
CKSEL = 01 (temp sense) or CKSEL =
10 (temp sense), internal reference
initially off
CKSEL = 01 (voltage conversion)
140
µs
9
CKSEL = 10 (voltage conversion),
internal reference on (Note 18)
9
CNVST Pulse Width
CKSEL = 10 (voltage conversion),
internal reference initially off
CKSEL = 00, CKSEL = 01 (temp sense)
40
tCSW
CKSEL = 01 (voltage conversion)
1.4
80
ns
µs
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