MAX11359AETL+ Maxim Integrated Products, MAX11359AETL+ Datasheet - Page 30

• Manufacturer Part Number: MAX11359AETL+
• Description: IC DAS SYSTEM 16BIT 40-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Data Acquisition System (DAS)r

Specifications of MAX11359AETL+

• Resolution (bits): 16 b
• Sampling Rate (per Second): 477
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Voltage Supply Source: Analog and Digital
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Program each UPIO1–UPIO4 as one of the following:
• General-purpose input
• Power-mode control
• Analog switch (SPST) and SPDT control input
• ADC data-ready output
• General-purpose output
• PWM output
• Alarm output
• SPI passthrough
The internal temperature sensor measures die tempera-
ture, and the external temperature sensor measures
remote temperatures. Use the internal temperature sen-
sor or external temperature sensor (remote transistor/
diode) with the ADC and internal current sources to
measure the temperature. For either method, two to four
currents are passed through a p-n junction and sense
resistor, and its temperature is calculated by a µC
using the diode equation and the forward-biased junc-
tion voltage drops measured by the ADC. The tempera-
ture offset between the internal p-n junction and
ambient is negligible. For the four and eight measure-
ment methods, the ratio of currents used in the diode
calculations is precisely known since the ADC mea-
sures the resulting voltage across the same sense
resistor. See Figure 13 for a block diagram of the tem-
perature sensor.
16-Bit Data-Acquisition System with ADC, DAC,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
Figure 12. High-Frequency Clock and FLL Block Diagram
30
______________________________________________________________________________________
M32K
FLLE
FREQUENCY
COMPARE
Temperature Sensor
ERROR
FREQ
32.768kHz
INTEGRATOR
FREQUENCY
TUNE<8:0>
CONTROLLED
OSCILLATOR
DIGITALLY
HFCE
Figure 13. Temperature-Sensor Measurement Block Diagram
AIN1
AIN2
CKSEL2
0
1
MUX
2:1
4.9152MHz HF OSCILLATOR AND FLL
IMUX<1:0>
IVAL<1:0>
CKSEL<1:0>
4.9152MHz
1, 2, 4, 8
DIVIDER
PROGRAMMABLE CURRENT SOURCE
TEMP SENSOR
CLKE
CURRENT
SOURCE
DEMUX
1:3
CRDY
HFCLK
CLK
AIN1
AIN2
TEMP+
TEMP-