MAX1299CEAE+【PDF 13/20 页】IC TEMP SENS W/ADC 16-SSOP

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录42

9页 10页 11页 12页 [13页]14页 15页 16页 17页

13 f

CLKs

WARMUP

44 f

CLKs

CONVERTION

CYCLES 212

REFERENCE

SAMPLING

3 f

CLKs

SUBTRACTION

AND WRITE TO

OUTPUT REGISTER

48 f

CLKs

CONVERTION CYCLES 112

13 f

CLKs

WARMUP

INPUT

ACQUISITION

INPUT

ACQUISITION

SSTRB

FCLK

4 f

CLKs

CONVERSION CYCLE 1

FIRST CONVERSION

SECOND CONVERSION

12-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

______________________________________________________________________________________ 13

maximum time the device takes to acquire the signal.

Calculate this with the following equation:

ACQ

= 7 (R

+ R

) C

where R

is the source impedance of the input signal,

is the T/H input impedance (40k&), and C

is the

input sampling capacitance of the ADC (4pF). Source

impedances below 100k& have no significant effect on

MAX1298/MAX1299 AC performance.

Analog Input Protection

Internal protection diodes clamp the analog inputs to

and GND, so channels can swing within GND -

0.3V and V

+ 0.3V without damage. However, for

accurate conversions, the inputs should not extend

beyond the supply rails.

If an off-channel analog input extends beyond the

supply rails, limit the input current to 2mA.

Serial Digital Interface

The MAX1298/MAX1299 feature a serial interface that is

fully compatible with SPI, QSPI, and MICROWIRE

devices. For SPI/QSPI, ensure that the CPU serial inter-

face runs in master mode so it generates the serial

clock signal. Select a 2.5MHz clock frequency or less,

and set zero values for clock polarity (CPOL) and

phase (CPHA) in the 礟 control registers. Figure 4

shows detailed serial interface timing information. See

Tables 25 for programming information.

13 f

CLKs

WARMUP

3 f

CLKs

WRITE TO OUTPUT

INPUT

ACQUISITION

CLKs

SSTRB

FCLK

REF

ACQUISITION 1

REF

ACQUISITION 2

44 f

CLKs

CONVERSION CYCLE 1

CONVERSION CYCLES 212

REFERENCE SAMPLING

Figure 3b. Temperature Conversion Timing Diagram

Figure 3a. Voltage Conversion Timing Diagram

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式