Datasheet > ATA5744N-TKSY

ATA5744N-TKSY

更新时间： 2024-02-11 03:37:51

品牌	Logo	应用领域
爱特美尔 - ATMEL		电信光电二极管电信集成电路
页数	文件大小	规格书
20页	310K
描述
Telecom Circuit, 1-Func, PDSO20, LEAD FREE, SSO-20

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技术参数
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ATA5744N-TKSY 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SSOP, SSOP20,.25	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.35
JESD-30 代码：	R-PDSO-G20	JESD-609代码：	e3
长度：	6.625 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	20
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：	SSOP
封装等效代码：	SSOP20,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
子类别：	Other Telecom ICs	最大压摆率：	0.0087 mA
标称供电电压：	5 V	表面贴装：	YES
电信集成电路类型：	TELECOM CIRCUIT	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn) - annealed	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	4.4 mm
Base Number Matches：	1

ATA5744N-TKSY 数据手册

Figure 3-3. Input Matching Network without SAW Filter

ATA5744

LNAGND

LNA_IN

ATA5744

f_RF= 433.92 MHz

f_RF= 315 MHz

LNAGND

LNA_IN

25n

15p

33p

RF_IN

3.3p

100p

TOKO LL2012

F22NJ

TOKO LL2012

F39NJ

22n

39n

Please note that for all coupling conditions (see Figure 3-2 on page 5 and Figure 3-3), the bond

wire inductivity of the LNA ground is compensated. C3 forms a series resonance circuit together

with the bond wire. L = 25 nH is a feed inductor to establish a DC path. Its value is not critical but

must be large enough not to detune the series resonance circuit. For cost reduction, this induc-

tor can be easily printed on the PCB. This configuration improves the sensitivity of the receiver

by about 1 dB to 2 dB.

4. Analog Signal Processing

4.1

IF Amplifier

The signals coming from the RF front end are filtered by the fully integrated 4th-order IF filter.

The IF center frequency is f_IF= 1 MHz for applications where f_RF= 315 MHz or

f_RF= 433.92 MHz is used. For other RF input frequencies, refer to Table 3-1 on page 5 to deter-

mine the center frequency.

The receiver ATA5744 employs an IF bandwidth of B_IF= 600 kHz and can be used together with

the U2741B in ASK mode.

4.2

RSSI Amplifier

The subsequent RSSI amplifier enhances the output signal of the IF amplifier before it is fed into

the demodulator. The dynamic range of this amplifier is DRRSSI = 60 dB. If the RSSI amplifier is

operated within its linear range, the best S/N ratio is maintained. If the dynamic range is

exceeded by the transmitter signal, the S/N ratio is defined by the ratio of the maximum RSSI

output voltage and the RSSI output voltage due to a disturber. The dynamic range of the RSSI

amplifier is exceeded if the RF input signal is about 60 dB higher compared to the RF input sig-

nal at full sensitivity.

ATA5744

4893A–RKE–11/05

1...3 4 567 8 9...20

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