ATA5276M-PGQW Atmel, ATA5276M-PGQW Datasheet - Page 2

• Manufacturer Part Number: ATA5276M-PGQW
• Description: IC XMITTER 125KHZ TPM 20-QFN
• Manufacturer: Atmel

Specifications of ATA5276M-PGQW

• Rf Type: TPM
• Frequency: 125kHz
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

2. General Description
2
ATA5276
The ATA5276 is a 125-kHz transmitter IC. It is dedicated to driving 125 kHz LC antenna tanks,
for the wake-up channel in Tire Pressure Measurement (TPM) applications or various power
saving Industrial wake-up applications..
It includes a control logic with VCO which generates the 125 kHz signal for the output driver
stage. A phase lock circuit regulates the driver output frequency on the antenna resonance fre-
quency, achieving a maximum field strength on the antenna. The driver duty cycle is regulated
and stabilizes the antenna current for a wide supply voltage range.
The IC can be controlled by a microcontroller or ECU via the one wire bi-directional interface. It
is used for the data transmission and to indicate errors. For the data transmission ASK modula-
tion is used. The antenna signal is modulated by the DIO interface line.
The IC has a build in diagnosis function and detects detuning and broken or short wire of the
antenna circuitry. If a failure is detected the IC indicates it by an error signal via the DIO line.
The integrated 5V regulator can be used externally for a load up to 10 mA.
Figure 2-1.
DVCC2
DVCC1
DRV3
DRV2
DRV1
Block Diagram
1
2
3
4
5
DVSS3
DVCC3
20
6
DVSS2
BOOST
19
7
ATA5276
125-kHz Transmitter
REG
5V
DVSS1
VCC
18
8
REF
VCO
SENSE
BIAS
DIO
17
9
VDIO
VSS
10
16
Line
K-
REXT
RCR
TM1
TM2
TM3
15
14
13
12
11
4909C–AUTO–01/07