MAX1098/MAX1099
10-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
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TIMING CHARACTERISTICS
(V
DD
= +4.75V to +5.25V (MAX1098), V
DD
= +2.7V to +3.6V (MAX1099), external reference, V
REF
= +2.5V (MAX1098), V
REF
= +1.2V
(MAX1099), f
SCLK
= 2.5MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Figures 4, 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCLK Frequency f
SCLK
2.5 MHz
SCLK Pulse Width Low t
CL
200 ns
SCLK Pulse Width High t
CH
200 ns
CS Low to SCLK High t
CSS
100 ns
SCLK High to CS Setup t
CSH
100 ns
CS Pulse Width t
CS
100 ns
SCLK High to CS Low Setup t
CS0
50 ns
SCLK High to CS High Setup t
CS1
100 ns
DIN Setup to SCLK High Time t
DS
100 ns
DIN Hold Time t
DH
0ns
SCLK Fall to Output Data Valid t
DO
R
L
= 100kΩ, C
L
= 50pF 150 ns
CS Fall to Output Enable t
DV
R
L
= 100kΩ, C
L
= 50pF 150 ns
CS Rise to Output Disable t
TR
R
L
= 100kΩ, C
L
= 50pF 50 ns
SSTRB Rise to SCLK Rise t
SCLK
0ns
SCLK Fall to SSTRB Fall t
SSTRB
200 ns
Note 1: Tested at V
DD
= +5.0V (MAX1098) and V
DD
= +3.0V (MAX1099).
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has
been calibrated.
Note 3: Conversion time is defined as the number of clock cycles (64 for voltage measurements, 125 for temperature measure-
ments) multiplied by the internal clock period.
Note 4: Individual analog input voltages cannot extend beyond the power-supply rails.
Note 5: Input resistance is typically 250MΩ; 5µA limit reflects limitations in production testing.
Note 6: Specifications for full-on status assume continuous conversions. Power modes are software selected (Table 3).
Note 7: Measured at V
FS(+4.75V)
- V
FS(+5.25V)
for the MAX1098 and at V
FS(+2.7V)
- V
FS(+3.6V)
for the MAX1099.
Note 8: External load should not change during conversions for specified accuracy.
Note 9: Excludes noise and self-heating effects. Output error for MAX109_C guaranteed by design.
Note 10:External temperature sensing over -40°C to +85°C range, device at +25°C. Guaranteed by design.
