TMP121 datasheet(6/19 Pages) TI2

6 / 19 page

TMP121

TMP123

SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005

www.ti.com

0.25s

0.5s

µA(active)

µA(idle)

Figure 2. Conversion Time and Period

The serial data of the TMP121 and TMP123 consists of

12-bit plus sign temperature data followed by a

confirmation bit and two high impedance bits. Data is

transmitted in Binary Two’s Complement format. Figure 3

describes the output data of the TMP121 and TMP123.

Timing Diagrams

The TMP121 and TMP123 are SPI-compatible. Figure 4

and Figure 5 describe the various timing requirements,

with parameters defined in Table 3.

PARAMETER

MIN

MAX

UNITS

SCK Period

100

SCK Falling Edge to Output Data Delay

CS to Rising Edge SCK Set-Up Time

CS to Output Data Delay

CS Rising Edge to Output High Impedance

Table 3. Timing Description

SO/I

SCK

D10

D11

D12

D13

D14

D15

Figure 3. Data READ

SCK

Figure 4. Output Data Timing Diagram

SCK

Figure 5. High Impedance Output Timing Diagram

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