ADT7301ARTZ-500RL7 Analog Devices Inc, ADT7301ARTZ-500RL7 Datasheet - Page 12

• Manufacturer Part Number: ADT7301ARTZ-500RL7
• Description: IC SENSOR TEMP 13BIT DGT SOT23-6
• Manufacturer: Analog Devices Inc

Specifications of ADT7301ARTZ-500RL7

• Function: Temp Monitoring System (Sensor)
• Topology: ADC, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 150°C
• Output Type: MICROWIRE™, QSPI™, SPI™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.5°C
• Supply Current: 1.6mA
• Supply Voltage Range: 2.7V To 5.25V
• Resolution (bits): 13bit
• Sensor Case Style: SOT-23
• No. Of Pins: 6
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-ADT7301EB - BOARD EVALUATION FOR ADT7301
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: Q2494841C

ADT7301
APPLICATIONS INFORMATION
MICROPROCESSOR INTERFACING
The ADT7301 serial interface allows easy interface to most
microcomputers and microprocessors. Figure 15 to Figure 18
show some typical interface circuits. The serial interface on the
ADT7301 consists of four wires: CS , DIN, DOUT, and SCLK.
All interface circuits shown use all four interface lines. However,
it is possible to operate the interface with three wires. If the
application does not require the power-down facility offered
by the ADT7301, the DIN line can be tied low permanently.
Thus, the interface can be operated from just three wires: SCLK,
CS , and DOUT.
The serial data transfer to and from the ADT7301 requires a
16-bit read operation. Many 8-bit microcontrollers have 8-bit
serial ports, and this 16-bit data transfer is handled as two 8-bit
transfers. Other microcontrollers and DSP processors transfer
16 bits of data in a serial data operation.
ADT7301-to-MC68HC11 Interface
Figure 15 shows an interface circuit between the ADT7301 and
the MC68HC11 microcontroller. The MC68HC11 is configured
in master mode with its CPOL and CPHA bits set to a Logic 1.
When the MC68HC11 is configured like this, its SCLK line idles
high between data transfers. Data is transferred to and from the
ADT7301 in two 8-bit serial data operations. Figure 15 shows
the full (4-wire) interface. PC1 of the MC68HC11 is configured
as an output and is used to drive the CS input.
ADT7301-to-8051 Interface
Figure 16 shows an interface circuit between the ADT7301 and
the microcontroller. The 8051 is configured in its Mode 0 serial
interface mode. The serial clock line of the 8051 (on P3.1) idles
high between data transfers. Data is transferred to and from the
ADT7301 in two 8-bit serial data operations. The ADT7301
outputs the MSB of its data stream as the first valid bit while the
8051 expects the LSB first. Thus, the data read into the serial
buffer needs to be rearranged before the correct data-word from
the ADT7301 is available in the accumulator.
*ADDITIONAL PINS OMITTED FOR CLARITY
ADT7301*
Figure 15. ADT7301-to-MC68HC11 Interface
DOUT
SCLK
DIN
CS
SCLK
MISO
MOSI
PC1
MC68HC11*
Rev. A | Page 12 of 16
In the example shown in Figure 16, the ADT7301 is connected
to the serial port of the 8051. Because the serial interface of the
8051 contains only one data line, the DIN line of the ADT7301
is tied low in Figure 16.
For applications that require the ADT7301 power-down feature,
the serial interface should be implemented using data port lines
on the 8051. This allows a full-duplex serial interface to be
implemented. The method involves generating a serial clock on
one port line while using two other port lines to shift data
in and out with the fourth port line connecting to CS . Port
lines 1.0 to 1.3 (with P1.1 configured as an input) can be used
to connect to SCLK, DOUT, DIN, and CS , respectively, to
implement this scheme.
ADT7301-to-PIC16C6x/7x Interface
Figure 17 shows an interface circuit between the ADT7301 and
the PIC16C6x/7x microcontroller. The PIC16C6x/7x synchro-
nous serial port (SSP) is configured as an SPI master with the
clock polarity bit set to a Logic 1. In this mode, the serial clock
line of the PIC16C6x/7x idles high between data transfers. Data
is transferred to and from the ADT7301 in two 8-bit serial data
operations. In the example shown in Figure 17, port line RA1 is
being used to generate the CS for the ADT7301.
*ADDITIONAL PINS OMITTED FOR CLARITY
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 17. ADT7301-to-PIC16C6x/7x Interface
ADT7301*
ADT7301*
Figure 16. ADT7301-to-8051 Interface
DOUT
DOUT
SCLK
SCLK
DIN
DIN
CS
CS
P3.1
P3.0
P1.2
P1.3
SCK
SDO
SDI
RA1
PIC16C6x/7x*
8051*