MAX1298 Datasheet, PDF (5/20 Pages) Maxim Integrated Products – 12-Bit Serial-Output Temperature Sensors with 5-Channel ADC

12-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
TIMING CHARACTERISTICS
(V_DD = +4.75V to 5.25V (MAX1298), V_DD = +2.7V to +3.6V (MAX1299), external reference, V_REF = +2.5V (MAX1298), V_REF = +1.2V
(MAX1299), 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
SCLK Frequency
SCLK Pulse Width Low
SCLK Pulse Width High
CS Low to SCLK High
SCLK High to CS Setup
CS Pulse Width
SCLK High to CS Low Setup
SCLK High to CS High Setup
DIN Setup to SCLK High Time
DIN Hold Time
SCLK Fall to Output Data Valid
CS Fall to Output Enable
CS Rise to Output Disable
SSTRB Rise to SCLK Rise
SYMBOL
f_SCLK
t_CL
t_CH
t_CSS
t_CSH
t_CS
t_CS0
t_CS1
t_DS
t_DH
t_DO
t_DV
t_TR
t_SCLK
CONDITIONS
R_L = 100kΩ, C_L = 50pF
R_L = 100kΩ, C_L = 50pF
R_L = 100kΩ, C_L = 50pF
MIN TYP MAX UNITS
2.5
MHz
200
ns
200
ns
100
ns
100
ns
100
ns
50
ns
100
ns
100
ns
0
ns
150
ns
150
ns
50
ns
0
ns
SCLK Fall to SSTRB Fall
t_SSTRB
200
ns
Note 1: Tested at V_DD = +5.0V (MAX1298) and V_DD = +3.0V (MAX1299).
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 4).
Note 7: Measured at V_FS(+4.75V) - V_FS(+5.25V) for the MAX1298 and at V_FS(+2.7V) - V_FS(+3.6V) for the MAX1299.
Note 8: External load should not change during conversions for specified accuracy.
Note 9: Excludes noise and self-heating effects. Output error for MAX129_C guaranteed by design.
Note 10: External temperature sensing over -40°C to +85°C range, device at +25°C. Guaranteed by design.
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