MAX1068 Maxim Integrated Products, MAX1068 Datasheet - Page 6

• Manufacturer Part Number: MAX1068
• Description: (MAX1067 / MAX1068) 200ksps Analog-to-Digital Converters
• Manufacturer: Maxim Integrated Products

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Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
TIMING CHARACTERISTICS (Figures 1, 2, 8, and 16)
(AV
(200ksps), external V
Note 1: AV
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after full-scale range has been
Note 3: Offset and reference errors nulled.
Note 4: DC voltage applied to on channel, and a full-scale 1kHz sine wave applied to off channels.
Note 5: Conversion time is measured from the rising edge of the 8th external SCLK pulse to EOC transition minus t
Note 6: See Figures 10 and 17.
Note 7: f
Note 8: Guaranteed by design, not production tested.
Note 9: Internal reference and buffer are left on between conversions.
Note 10: Defined as the change in the positive full scale caused by a ±5% variation in the nominal supply voltage.
6
Acquisition Time
SCLK to DOUT Valid
CS Fall to DOUT Enable
CS Rise to DOUT Disable
CS Pulse Width
CS to SCLK Setup
CS to SCLK Hold
SCLK High Pulse Width
SCLK Low Pulse Width
SCLK Period
DIN to SCLK Setup
DIN to SCLK Hold
CS Falling to DSPR Rising
DSPR to SCLK Falling Setup
DSPR to SCLK Falling Hold
DD
_______________________________________________________________________________________
= +4.75V to +5.25V, DV
calibrated.
data-transfer mode.
= number of scans, n
SCLK
PARAMETER
DD
= 4.8MHz, f
= DV
DD
REF
= +5.0V.
= +4.096V, T
INTCLK
DD
2
= number of SCLK cycles, and n
= +2.7V to +5.25V, f
= 4.0MHz. Sample rate is calculated with the formula f
SYMBOL
A
t
t
= T
t
t
t
t
ACQ
t
CSW
t
CSS
CSH
t
t
t
t
t
t
t
FSS
FSH
DO
CH
DH
DV
CL
CP
DS
DF
TR
MIN
to T
External clock (Note 6)
C
C
C
SCLK rise
SCLK fall (DSP)
SCLK rise
SCLK fall (DSP)
Duty cycle 45% to 55%
Duty cycle 45% to 55%
SCLK rise
SCLK fall (DSP)
SCLK rise
SCLK fall (DSP)
MAX
DOUT
DOUT
DOUT
SCLK
, unless otherwise noted. Typical values are at T
= 30pF
= 30pF
= 30pF
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion
CONDITIONS
3
= number of internal clock cycles (see Figures 11–14).
Conversion
Data transfer
Conversion
Data transfer
s
= n
1
(n
2
MIN
729
100
100
209
100
100
100
93
93
93
93
/ f
0
0
0
SCLK
A
= +25°C.)
+ n
TYP
3
/ f
INTCLK
ACQ
MAX
100
100
80
) -1 where: n
in 8-bit
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1