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MAX6629MUT#TG16 数据手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
分类:
温度传感器
封装:
SOT-23-6
描述:
温度传感器芯片, SPI接口, 数字式, ± 0.8°C, -55 °C, 125 °C, SOT-23, 6 引脚
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MAX6629MUT#TG16数据手册
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out at SO on SCK’s falling edge with the sign bit (D15)
first, followed by the MSB. Data is sent in one 16-bit word,
and CS must remain low until all 16 bits are transferred. If
CS goes high in the middle of a transmission, it is neces-
sary to wait the conversion time (less than 300ms) before
attempting a new read. The serial data is composed of 12
+ 1 data bits (D15–D3) and 3 trailing bits (D2–D0). D2 is
always low, serving as the confirmation bit that the device
has been communicated with. The last 2 bits, D0 and D1,
are undefined and are always in high-impedance mode
(Table 1). The power-up state for SO is high impedance.
Figure 3 shows the detailed serial timing specifications
for the SPI port. The temperature data format is in two’s
complement format (Table 2).
Power Shutdown Mode
The MAX6629–MAX6632 do not have a built-in power
software shutdown mode. However, a power shutdown
mode is easily implemented utilizing an unused logic
gate. A typical CMOS or TTL logic output has enough
drive capability to serve as the power source if its output
voltage level exceeds 3V, as shown in Figure 1. Drive the
logic output low to provide a hardware shutdown mode.
Idle Mode
The MAX6629–MAX6632 can be put into idle mode by
pulling CS low. Data can be clocked out when the device
is in idle mode.
Power-On Reset (POR)
The POR supply voltage of the MAX6629–MAX6632 is
typically 1.6V. Below this supply voltage, the interface is
inactive and the data register is set to the POR state, 0°C.
When power is first applied and V
CC
rises above 1.6V
(typ), the device starts to convert, although temperature
reading is not recommended at V
CC
levels below 3.0V.
Applications Information
Table 2. Temperature Data Format
(Two’s Complement)
Table 1. Data Output Format
Figure 3. SPI Timing Diagram
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Sign
MSB
Data
LSB
Data
Low High-Z High-Z
TEMPERATURE
(°C)
DIGITAL OUTPUT (BINARY)
D15–D3 D2 D1, D0
150 0,1001,0110,0000 0 XX
125 0,0111,1101,0000 0 XX
25 0,0001,1001,0000 0 XX
0.0625 0,0000,0000,0001 0 XX
0 0,0000,0000,0000 0 XX
-0.0625 1,1111,1111,1111 0 XX
-25 1,1110,0111,0000 0 XX
-55 1,1100,1001,0000 0 XX
D15 D0D1D2D3
SCK
SO
t
DV
t
CSS
t
DO
CS
t
TR
MAX6629–MAX6632 12-Bit + Sign Digital Temperature Sensors
with Serial Interface
www.maximintegrated.com
Maxim Integrated
│
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