MAX1275 Maxim Integrated Products, MAX1275 Datasheet - Page 4

• Manufacturer Part Number: MAX1275
• Description: (MAX1274 / MAX1275) 12-Bit ADCs
• Manufacturer: Maxim Integrated Products

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1.8Msps, Single-Supply, Low-Power,
True-Differential, 12-Bit ADCs
TIMING CHARACTERISTICS
(V
values are at T
Figure 1. Detailed Serial-Interface Timing
4
Note 1: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the gain error and the offset
Note 2: No missing codes over temperature.
Note 3: Conversion time is defined as the number of clock cycles (16) multiplied by the clock period.
Note 4: At sample rates below 10ksps, the input full-linear bandwidth is reduced to 5kHz.
Note 5: The listed value of three SCLK cycles is given for full-speed continuous conversions. Acquisition time begins on the 14th ris-
Note 6: Undersampling at the maximum signal bandwidth requires the minimum jitter spec for SINAD performance.
Note 7: Digital supply current is measured with the V
SCLK Pulse-Width High
SCLK Pulse-Width Low
SCLK Rise to DOUT Transition
DOUT Remains Valid After SCLK
CNVST Fall to SCLK Fall
CNVST Pulse Width
Power-Up Time; Full Power-Down
Restart Time; Partial Power-Down
CNVST
DD
DOUT
SCLK
_______________________________________________________________________________________
= +5V ±5%, V
error have been nulled.
ing edge of SCLK and terminates on the next falling edge of CNST. The IC idles in acquisition mode between conversions.
t
SETUP
PARAMETER
A
= +25°C.)
L
= V
t
DD
CL
, V
t
DHOLD
t
t
CH
DOUT
REF
= 4.096V, f
SYMBOL
T
t
t
DHOLD
PWR-UP
t
SETUP
t
DOUT
t
CSW
t
RCV
t
CH
CL
SCLK
V
V
C
C
C
V
V
V
L
L
L
L
L
L
L
L
= 28.8MHz, 50% duty cycle, T
= 1.8V to V
= 1.8V to V
= 1.8V to V
= 1.8V to V
= 1.8V to V
= 30pF, V
= 30pF, V
= 30pF, V
IH
t
CSW
level equal to V
L
L
L
DD
DD
DD
DD
DD
= 4.75V to V
= 2.7V to V
= 1.8V to V
CONDITIONS
Figure 2. Load Circuits for Enable/Disable Times
L
, and the V
a) HIGH-Z TO V
DOUT
AND V
DD
DD
6kΩ
DD
OH
TO HIGH-Z
A
IL
OH
= T
, V
level equal to GND.
GND
OL
MIN
TO V
OH
to T
,
C
MAX
L
15.6
15.6
MIN
10
20
4
, unless otherwise noted. Typical
TYP
16
2
b) HIGH-Z TO V
DOUT
AND V
OL
6kΩ
MAX
TO HIGH-Z
14
17
24
OL
V
L
, V
C
GND
OH
L
Cycles
TO V
UNITS
ms
ns
ns
ns
ns
ns
ns
OL
,