Datasheet > ATA5283_07

ATA5283_07

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
14页	259K
描述
Interface IC for 125 kHz Wake-up Function

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

ATA5283_07 数据手册

Figure 3-5. Turn Off Delay Time (t_off) versus Antenna Q-Factor

200

180

160

140

120

= 125 kHz

field

typ.

max.

100

min.

Q-factor

3.5

3.6

3.7

Data Output

The data output N_DATA outputs the demodulated and digitized LF signal according to the

envelope of the antenna input signal. In the standby mode the N_DATA output is disabled and

set to level 1. It is enabled by the wake-up signal and it outputs 1 level if the IC detects the car-

rier signal and a 0 level during the gaps (see Figure 3-1 on page 3).

As the circuit does not check the received data (except the preamble), it is up to the user to

choose the kind of encoding (pulse distance, Manchester, bi-phase...) wanted.

Wake-up Signal

The wake-up signal (N_WAKEUP) indicates that the ATA5283 has detected the end of a pream-

ble signal and has left the standby mode. It can be used as a wake-up or a chip select signal for

an external device (see Figure 3-1 on page 3).

After a preamble is detected the first valid gap (Start Gap) sets the N_WAKEUP output to low

and enables the data output N_DATA. The N_WAKEUP holds the low level until the IC is reset

to the standby mode by a reset signal.

Reset

The IC is reset either by the internal POR circuit during a power on sequence or by a high pulse

at the RESET pin. After the reset all internal counters are in the initial state and the IC is in the

standby listen mode.

The POR circuit generates a reset while the supply voltage V_DDis below the power on reset

threshold V_PORand release the function of the IC if V_DDexceeds this threshold.

A high signal at the RESET pin resets the complete circuit. If the IC is activated a reset signal is

necessary to activate the standby listen mode.

The RESET pin can also be used to hold the IC in a power down state. In this state the IC is out

of operation and the current consumption is below the standby current.

Note:

The RESET pin is high impedance CMOS input. To avoid floating effects like undefined input

states and malfunctions it should not be open.

ATA5283

4598H–AUTO–03/07

1...3 4 567 8 9...14

下载PDF

与ATA5283_07相关器件

型号	品牌	描述	获取价格	数据表
ATA5283P-6AP	ATMEL	Interface IC for 125 kHz Wake-up Function	获取价格
ATA5283P-6APJ	ATMEL	Interface IC for 125 kHz Wake-up Function	获取价格
ATA5283P-6AQ	ATMEL	Interface IC for 125 kHz Wake-up Function	获取价格
ATA5283P-6AQJ	ATMEL	Interface IC for 125 kHz Wake-up Function	获取价格
ATA5291	MICROCHIP	An LF antenna driver device for passive entry/go (PEG) systems. It can drive up to eight l	获取价格
ATA5293	MICROCHIP	An LF antenna driver device for passive entry/go (PEG) systems. It can drive up to eight l	获取价格