Rainbow Electronics MAX1089 - Manual (Page 4)

MAX1086–MAX1089
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
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TIMING CHARACTERISTICS (Figures 1 and 2)
(V DD = +2.7V to +3.6V, V REF = +2.5V for MAX1087/MAX1089, or V DD = +4.75V to +5.25V, V REF = +4.096V for MAX1086/MAX1088,
0.1µF capacitor at REF, f SCLK = 8MHz (50% duty cycle); AIN- = GND for MAX1088/MAX1089. T A = T MIN to T MAX, unless otherwise
noted. Typical values at T A = +25°C.)
PARAMETERS SYMBOL CONDITIONS MIN TYP MAX UNITS
SCLK Pulse Width High t CH 38 ns
SCLK Pulse Width Low t
CL
38 ns
SCLK Fall to DOUT Transition t DOT C LOAD = 30pF 60 ns
SCLK Rise to DOUT Disable t DOD C LOAD = 30pF 100 500 ns
CNVST Rise to DOUT Enable t DOE C LOAD = 30pF 80 ns
CNVST Fall to MSB Valid t DOV C LOAD = 30pF 3.7 µs
CNVST Pulse Width t CSW 30 ns
Note 1: Unipolar input.
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after offset and gain errors have
been removed.
Note 3: Offset nulled.
Note 4: The absolute input range for the analog inputs is from GND to V
DD .
• • •
• • •
• • •
CNVST
SCLK
DOUT
t DOE
HIGH-Z HIGH-Z
t CSW
t DOT
t CL
t
CH
t DOD
DOUT
6k Ω
6k Ω
C L
GND
DOUT
C L
GND
V DD
a) HIGH -Z TO V OH , V OL TO V OH , AND V OH TO HIGH -Z a) HIGH -Z TO V OL , V OH TO V OL , AND V OL TO HIGH -Z
Figure 1. Detailed Serial-Interface Timing Sequence
Figure 2. Load Circuits for Enable/Disable Times