Datasheet MAX31856 (Analog Devices) - 5

link to page 2 link to page 7 MAX31856 Precision Thermocouple to Digital Converter with Linearization
Electrical Characteristics (continued)
(3.0V ≤ VDD ≤ 3.6V, TA = -55°C to +125°C, unless otherwise noted.)(Notes 2, 3, and 4)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Common-Mode Rejection CMR 0.5V ≤ VCM ≤ 1.4V 70 dB 50/60Hz Noise Rejection Fundamental and harmonics 91 dB
SERIAL INTERFACE
Input Leakage Current ILEAK (Note 5) -1 +1 µA Output High Voltage VOH IOUT = -1.6mA VCC - 0.4 V Output Low Voltage VOL IOUT = 1.6mA 0.4 V Input Capacitance CIN 8 pF Serial Clock Frequency fSCL 5 MHz SCK Pulse High Width tCH 100 ns SCK Pulse Low Width tCL 100 ns SCK Rise and Fall Time tR, tF CL = 10pF 200 ns CS Fall to SCK Rise tCC CL = 10pF 100 ns SCK to CS Hold tCCH CL = 10pF 100 ns CS Rise to Output Disable tCDZ CL = 10pF 40 ns Data to SCLK Setup tDC 35 ns SCLK to Data Hold tCDH 35 ns SCK Fall to Output Data Valid tCDD CL = 10pF 80 ns CS Inactive Time tCWH (Note 3) 400 ns
Note 2:
All voltages are referenced to GND. Currents entering the IC are specified positive, and currents exiting the IC are negative.
Note 3:
All Serial Interface timing specifications are guaranteed by design.
Note 4:
Specification is 100% tested at TA = +25°C. Specification limits over temperature (TA = TMIN to TMAX) are guaranteed by design and characterization; not production tested.
Note 5:
For all pins except T+ and T- (see the Thermocouple Input Bias Current parameter in the Electrical Characteristics table.
Note 6:
Using a common-mode voltage other than VBIAS will change this specification. See the Typical Operating Characteristics for details.
Note 7:
Input-referred full-scale voltage is 78.125mV when AV = 8 and is 19.531mV when AV = 32.
Note 8:
Overvoltage and undervoltage limits apply to T+, T-, and BIAS pins. www.maximintegrated.com Maxim Integrated │ 5