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AS3909 Datasheet(PDF) 75 Page - ams AG

Part # AS3909
Description  13.56 MHz RFID Reader IC, ISO-14443 A/B
PDF  77 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3909 Datasheet(HTML) 75 Page - ams AG

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ams Datasheet, Confidential: 2013-Oct [3-02]
AS3909/AS3910 – 75
Ref e r e nc e Guide
1
General Description
2
Key Benefits & Features
3
Applications
3
Block Diagram
4
Pin Assignments
6Absolute Maximum Ratings
7
Electrical Characteristics
7
Operating Conditions
7
DC / AC Characteristics For Digital Inputs and Outputs
8
Electrical Specification
10
Detailed Description
11
Transmitter
11
Receiver
11
Phase and Amplitude Detector
11
A/D Converter
12
External Field Detector
12
Quartz Crystal Oscillator
12
Power Supply Regulators
12
POR and Bias
13
ISO-14443 and NFCIP Framing
13
FIFO
13
Control Logic
13
SPI Interface
14
Application Information
14
Operating Modes
14
Transmitter
15
Receiver
16
Gain Reduction, AGC and Squelch
16
Automatic Gain Reduction (AGC)
16
Squelch
17
Setting Gain Reduction in Receiver Configuration Register
(#06)
17
RSSI
17
AM and PM Demodulation
18
A/D Converter
18
Phase and Amplitude Detector
18
Phase Detector
18
Antenna Tuning Check
19
PM Demodulation
19
Amplitude Detector
19
External Field Detector
19
Target Activation Detector
19
RF Collision Avoidance Detector
20
Quartz Crystal Oscillator
21
Power Supply, Regulators
22
Communication to External Microcontroller
22
Serial Peripheral Interface (SPI)
23
SPI Operation MODE Bits
24
Writing of Data to Addressable Registers (WRITE Mode)
Reference Guide



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