Atmel ATA5283 - Manual
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Table of Contents:
- Page 2 – Pin Configuration; Pinning TSSOP8L; VDD; Pin Description
- Page 3 – Functional Description; AGC Amplifier; Preamble Detection; Communication Protocol
- Page 4 – because of the internal regulator circuit (see; Automatic Gain Control
- Page 5 – Signal Conditioner; Figure; Coil
- Page 6 – Data Output
- Page 7 – Application
- Page 8 – Coil Input Signal (mV
- Page 10 – Electrical Characteristics
- Page 12 – Extended Type Number; TSSOP8L; specifications; Dimensions in mm
- Page 13 – Revision History; History
- Page 14 – © 2007 Atmel Corporation. All rights reser ved. Atmel
Features
•
Wake-up Function for a Microcontroller with Preamble Detection
•
1 mV
rms
Sensitivity
•
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
Application
•
Tire Pressure Monitoring (TPM)
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-
c e i v e r , a b a tt e r y , te m p e r a t u r e - a n d p r e s s u r e s e n s o r , i t i s p o s s i b l e t o d e s i g n a
complete Tire Pressure Monitoring system (TPM).
Figure 1-1.
Block Diagram
Condi-
tioner
Amplifier
with AGC
Preamble
check
N_WAKEUP
N_DATA
RESET
COIL
Vref
GND
VDD
ATA5283
Battery
Lx
TST1
TST2
Interface IC for
125 kHz
Wake-up
Function
ATA5283
4598H–AUTO–03/07
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Summary
2 4598H–AUTO–03/07 ATA5283 2. Pin Configuration Figure 2-1. Pinning TSSOP8L VDD 3 4 2 1 N_DATA N_WAKEUP RESET COIL 8 7 6 5 TST2 TST1 VSS 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 Externa...
3 4598H–AUTO–03/07 ATA5283 3. Functional Description The ATA5283 is an ultra-low power ASK receiver. Without a carrier signal it operates in thestandby listen mode. In this mode it monitors the coil input with a very low current consumption.To activate the IC and the connected control unit, the tran...
4 4598H–AUTO–03/07 ATA5283 3.3 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 the reference v...
