ATA5283_07 ATMEL [ATMEL Corporation], ATA5283_07 Datasheet

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ATA5283_07

Manufacturer Part Number
ATA5283_07
Description
Interface IC for 125 kHz Wake-up Function
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
Features
Application
1. Description
The ATA5283 is a 125 kHz ultra-low power receiver used for the wake-up function of
Tire Pressure Monitoring (TPM) application. The sensitive input stage of the IC ampli-
fies and demodulates the carrier signal from the antenna coil to a digital output signal
for a microcontroller. During the standby mode the preamble detection unit monitors
the incoming signal and activates the wake-up output and the data output, if the IC
receives a proper 125 kHz carrier signal.
By combining the IC with an antenna coil, a microcontroller, an RF transmitter/trans-
ceiver, a battery, temperature- and pressure sensor, it is possible to design a
complete Tire Pressure Monitoring system (TPM).
Figure 1-1.
Wake-up Function for a Microcontroller with Preamble Detection
1 mV
1 µA Standby Current
Power Supply: 2V to 3.8V
Baud Rate: up to 4 kbps (ASK Modulation)
Operation Temperature: up to 125°C
Withstands +175°C
Few External Components
Tire Pressure Monitoring (TPM)
Lx
rms
Sensitivity
Block Diagram
COIL
TST1
TST2
Vref
with AGC
Amplifier
Battery
Condi-
tioner
VDD
GND
Preamble
check
ATA5283
N_WAKEUP
N_DATA
RESET
Interface IC for
125 kHz
Wake-up
Function
ATA5283
4598H–AUTO–03/07

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ATA5283_07 Summary of contents

Page 1

Features • Wake-up Function for a Microcontroller with Preamble Detection • Sensitivity rms • 1 µA Standby Current • Power Supply 3.8V • Baud Rate kbps (ASK Modulation) • Operation Temperature ...

Page 2

Pin Configuration Figure 2-1. Pinning TSSOP8L Figure 2-2. Pin Description Pin Symbol Function 1 COIL Antenna coil input 2 TST1 Test pin (reserved) 3 TST2 Test pin (reserved) 4 VSS Signal ground 5 RESET External reset input 6 N_DATA ...

Page 3

Functional Description The ATA5283 is an ultra-low power ASK receiver. Without a carrier signal it operates in the standby listen mode. In this mode it monitors the coil input with a very low current consumption. To activate the IC ...

Page 4

Automatic Gain Control For a correct demodulation the signal conditioner needs appropriate internal signal amplitude. To control the input signal the ATA5283 has a build in digital AGC. The gain control circuit regu- lates the internal signal amplitude to ...

Page 5

Signal Conditioner The signal conditioner demodulates the amplifier output signal and converts binary signal. It compares the carrier signal with the 50% reference level (see Ref1 in a logical 1, if the carrier signal stays below ...

Page 6

Figure 3-5. 3.5 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 ...

Page 7

Standby Listen Mode In the standby listen mode the IC monitors the coil input with a very low current consumption. The automatic gain control is switched off and the gain is set to the maximum value. The N_DATA and ...

Page 8

Figure 3-7. Figure 3-8. ATA5283 8 Pin Connection and Pin Protection ATA5283 1 COIL_X Divider impedance 143 VDD 2 TST1 VDD VDD 3 TST2 4 VSS Coil Input Impedance 10000 max. typ. min. 1000 100 1 ...

Page 9

Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated ...

Page 10

Electrical Characteristics 3.8V – +105°C, characterized up to 125°C, unless other specified SS DD amb No. Parameters 1 Power Supply and Coil Limiter 1.1 Power supply Reset supply ...

Page 11

Electrical Characteristics (Continued 0V 3.8V – +105°C, characterized up to 125°C, unless other specified SS DD amb No. Parameters 3 Automatic Gain Control 3.1 Preamble detection time 3.2 AGC ...

Page 12

Ordering Information Extended Type Number ATA5283P-6AQJ ATA5283P-6APJ 9. Package Information Package: TSSOP 8L Dimensions 0.65 = 1.95 nom. Drawing-No.: 6.543-5083.01-4 Issue: 2; 15.03.04 ATA5283 12 Package Remarks TSSOP8L 5000 pieces, taped and reeled, Pb-free TSSOP8L ...

Page 13

Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4598H-AUTO-03/07 4598G-AUTO-01/07 4598F-AUTO-09/05 4598H–AUTO–03/07 History Number 5.2.1 in section 7 “Electrical Characteristics” on ...

Page 14

Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 ...

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