Datasheet > ATA5823-PLQW80

ATA5823-PLQW80

更新时间： 2024-02-12 03:09:43

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
98页	3631K
描述
Telecom IC, PQCC48

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ATA5823-PLQW80 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	QCCN, LCC48,.27SQ,20	Reach Compliance Code：	unknown
风险等级：	5.84	JESD-30 代码：	S-PQCC-N48
端子数量：	48	最高工作温度：	105 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	QCCN	封装等效代码：	LCC48,.27SQ,20
封装形状：	SQUARE	封装形式：	CHIP CARRIER
电源：	2.5/5 V	认证状态：	Not Qualified
子类别：	Other Telecom ICs	表面贴装：	YES
温度等级：	INDUSTRIAL	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	QUAD
Base Number Matches：	1

ATA5823-PLQW80 数据手册

5. Typical Key Fob Application for Full-duplex PEG

Figure 5-1. Typical Key Fob Application for Full-duplex PEG, 433.92 MHz

C₄

CDEM

RSSI

C₆

C₅

TEST3

RF_IN

SCK

SDI_TMDI

SDO_TMDO

CLK

C₇

Microcontroller

433_N868

ATA5823/ATA5824

AVCC

R₁

Loop antenna 2

R_PWR

PWR_H

RF_OUT

IRQ

L₂

POUT

VCC

VSINT

VSS

C₈

C₉

20% overlap

XTAL2

C₁

Loop antenna 1

13.25311 MHz

C₂

C₁₀

C₃

+ Lithium cell

Figure 5-1 shows a typical 433.92 MHz PEG key fob application. The external components are

10 capacitors, 1 resistor, 1 inductor and a crystal. C₁to C₃are 68 nF voltage supply blocking

capacitors. C₇is a 10 nF supply blocking capacitor. C₄is a 15 nF fixed capacitor used for the

internal quasi-peak detector and for the high-pass frequency of the data filter. C₅, C₆, C₈and C₉

are RF matching capacitors in the range of 1 pF to 33 pF. L₂is a feed inductor of about 120 nH.

₁₀is a 10 nF capacitor which is necessary to prevent that signals couple into the pin R_PWR,

causing amplitude modulation of the output power and a spurious rise of the transmitted signal.

R₁and C₁₀should be placed close to the R_PWR pin. A load capacitor of 9 pF for the crystal is

integrated. R₁is typically 22 kΩ and SETPWR is programmed to get an output power of –7 dBm

in full-duplex mode and 5 dBm in half-duplex mode. The quality factor of the loop antenna 1 is

only reduced by the quality factor of L₂, the tolerances of C₉and C₈are thus important. The qual-

ity factor of the loop antenna 2 is reduced to half due to the loading with the input impedance of

RF_IN. With well designed loop antennas and the correct degree of overlapping, the isolation

between RF_OUT and RF_IN is about 28 dB and the coupled output power from RF_OUT to

RF_IN is about –35 dBm. The decoupling of two loop antennas situated close to each other is

due to the effect that the magnetic flux from the part of loop antenna 1 that does not overlap and

that of the overlapping part has an opposite direction. Depending on the relative position

between the two antennas, a decoupling of 28 dB is achievable. Due to additional capacitive

coupling between the loops the position of the components C₅, C₆and C₈, C₉are also important.

The receive Sensitivity in full-duplex mode is reduced from –106 dBm without coupled

RF-Power at RF_IN to –96 dBm with –35 dBm coupled RF power at RF_IN.

ATA5823/ATA5824

4829D–RKE–06/06

1...5 6 789 10 11...98

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