ATA5760

更新时间： 2024-02-21 09:11:15

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
41页	671K
描述
UHF ASK/FSK Receiver

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数据手册

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ATA5760 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：	SOP, SOP20,.4	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.83
JESD-30 代码：	R-PDSO-G20	JESD-609代码：	e3
长度：	12.825 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：	SOP
封装等效代码：	SOP20,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	2.6 mm	子类别：	Other Telecom ICs
最大压摆率：	0.0099 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：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	7.4 mm	Base Number Matches：	1

ATA5760 数据手册

ATA5760/ATA5761

Figure 4-1. Steady L State Limited DATA Output Pattern

DATA

t_{DATA_L_max}

t_{DATA_min}

4.3

FSK/ASK Demodulator and Data Filter

The signal coming from the RSSI amplifier is converted into the raw data signal by the ASK/FSK

demodulator. The operating mode of the demodulator is set via the bit ASK/_FSK in the

OPMODE register. Logic L sets the demodulator to FSK, applying H to ASK mode.

In ASK mode an automatic threshold control circuit (ATC) is employed to set the detection refer-

ence voltage to a value where a good signal to noise ratio is achieved. This circuit also implies

the effective suppression of any kind of in-band noise signals or competing transmitters. If the

S/N (ratio to suppress in-band noise signals) exceeds about 10 dB the data signal can be

detected properly, but better values are found for many modulation schemes of the competing

transmitter.

The FSK demodulator is intended to be used for an FSK deviation of 10 kHz ≤∆f ≤100 kHz. In

FSK mode the data signal can be detected if the S/N (ratio to suppress in-band noise signals)

exceeds about 2 dB. This value is valid for all modulation schemes of a disturber signal.

The output signal of the demodulator is filtered by the data filter before it is fed into the digital

signal processing circuit. The data filter improves the S/N ratio as its passband can be adopted

to the characteristics of the data signal. The data filter consists of a 1^st-order high pass and a

2^nd-order lowpass filter.

The highpass filter cut-off frequency is defined by an external capacitor connected to pin CDEM.

The cut-off frequency of the highpass filter is defined by the following formula:

fcu_DF = ------------------------------------------------------------

2 × π × 30 kΩ× CDEM

In self-polling mode, the data filter must settle very rapidly to achieve a low current consumption.

Therefore, CDEM cannot be increased to very high values if self-polling is used. On the other

hand CDEM must be large enough to meet the data filter requirements according to the data sig-

nal. Recommended values for CDEM are given in the electrical characteristics.

The cut-off frequency of the lowpass filter is defined by the selected baud-rate range

(BR_Range). The BR_Range is defined in the OPMODE register (refer to section “Configuration

of the Receiver” on page 23). The BR_Range must be set in accordance to the used baud-rate.

The ATA5760/ATA5761 is designed to operate with data coding where the DC level of the data

signal is 50%. This is valid for Manchester and Bi-phase coding. If other modulation schemes

are used, the DC level should always remain within the range of V_{DC_min}= 33% and

_{DC_max}= 66%. The sensitivity may be reduced by up to 2 dB in that condition.

Each BR_Range is also defined by a minimum and a maximum edge-to-edge time (t_{ee_sig}).

These limits are defined in the electrical characteristics. They should not be exceeded to main-

tain full sensitivity of the receiver.

4896C–RKE–04/06

1...4 5 678 9 10...41

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与ATA5760相关器件

型号	品牌	描述	获取价格	数据表
ATA5760_08	ATMEL	UHF ASK/FSK Receiver	获取价格
ATA5760N3-TGQY	ATMEL	UHF ASK/FSK Receiver	获取价格
ATA5760N-TGQY	ATMEL	UHF ASK/FSK Receiver	获取价格
ATA5760N-TGSY	ATMEL	UHF ASK/FSK Receiver	获取价格
ATA5761	ATMEL	UHF ASK/FSK Receiver	获取价格
ATA5761N-TGQY	ATMEL	UHF ASK/FSK Receiver	获取价格

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