Atmel ATA5283 инструкция обслуживания

Features • W ake-up Function for a Microcontr oller with Preamble Detection • 1m V rms Sensitivity • 1 µA Standby Current • P ower Supply: 2V to 3.8V • Baud Rate: up to 4 kb ps (ASK Modulation) • Operation T emperature: up to 125°C • Withstan ds +175°C • Few External Components Application • Tire Pressure Mo nitoring (TPM) 1. D[...]

2 4598H–AUTO–03/07 ATA5283 2. Pin Configuration Figure 2-1. Pinning TSSOP8 L 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 Functi on 1 COIL Antenna coil input 2 TST1 T est pin (reserved) 3 TST2 T est pin (reserved) 4 VSS Signal ground 5 RESET Externa l reset input 6 N_D A T A Data signal 7 N[...]

3 4598H–AUTO–03/07 ATA5283 3. Functional Description The ATA5283 is an ultra-low pow er ASK receiver. Without a carr ier signal it operates in the standby listen mode. In this mode it monitors th e coil input with a very low current consu mption. To activate t he IC and the connected con trol unit, the transmit ting stage must send t he preambl[...]

4 4598H–AUTO–03/07 ATA5283 3.3 A utomatic Gain Control For a correct demodulation the signal conditione r needs appropriate interna l signal amplitude. To control the in put signal the ATA52 83 has a build in dig ital AGC. The gain control circuit regu- lates the internal signal amplitude to the reference value (Ref2, Figure 3-2 ). It de crease[...]

5 4598H–AUTO–03/07 ATA5283 3.4 Signal Conditioner The signal conditioner d emodulates the amplifier outp ut signal and conver ts it to a binary signal. It compares the carrier signa l with the 50% reference level (see Ref 1 in Figure 3-3 ) and delivers a logical 1, if the carrier signal stays below th e reference and a logical 0, if it exc eeds[...]

6 4598H–AUTO–03/07 ATA5283 Figure 3-5. Turn Off Delay Time (t off ) versus Antenna Q- Factor 3.5 Data Output The data output N_DATA outputs the demodulated and digitized LF signal according to the envelope of the ante nna input signal. In the standby mode the N_DATA ou tput is disabled and set to level 1. It is enabled by t he wake-up si gnal a[...]

7 4598H–AUTO–03/07 ATA5283 3.8 Standb y Listen Mode In the standby listen mode the IC monitors the co il 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 the N_WAKEUP outp ut are set to a high level. Before the controller enters its standby mode after [...]

8 4598H–AUTO–03/07 ATA5283 Figure 3-7. Pin Connection an d Pin Protection Figure 3-8. Coil Input Impe dance 2 k Ω Divider impedance 143 k Ω to 5 M Ω 2 k Ω 7 VDD VDD N_W AKEUP N_D A T A RESET VDD TST1 TST2 VSS COIL_X 6 VDD A T A5283 VDD VDD 1 k Ω VDD 5 8 2 3 4 1 1 100 1000 10000 10 10000 1000 100 Coil Input Signal (mV pp ) Z (k Ω ) m[...]

9 4598H–AUTO–03/07 ATA5283 4. Absolute Maxim um Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause per manent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions bey ond t hose indicated in the operational sectio ns of this specification is n[...]

10 4598H–AUTO–03/07 ATA5283 7. Electrical Characteristics V SS = 0V , V DD = 2V to 3.8V , T amb = –40 ° C to +105°C, characterized up to 125°C , unless other specified No. Parameter s T est Conditions Pin Symbol Min. T yp. Max. Unit T ype* 1 P ower Supply and Coil Limiter 1.1 P ower supply 8 V DD 23 . 23 . 8 V A 1.2 Reset supply current ?[...]

11 4598H–AUTO–03/07 ATA5283 3 Automatic Gain Control 3.1 Preamble detection time V IN ≥ 3m V rms at 125 kHz t DAGC 19 2 P er iods B 3.2 AGC adjustment time f = 125 kHz V IN = 1 mV rms V IN = 3 mV rms V IN = 30 mV rms V IN = 100 mV rms V IN = 1V rms t AGC t AGC t AGC t AGC t AGC 0 48 220 292 450 512 P er iods C 3.3 Signal change rate (gap dete[...]

12 4598H–AUTO–03/07 ATA5283 9. P acka g e Inf ormation 8. Or dering Information Extended T ype Number P acka ge Remarks A T A5283P-6AQJ TSSOP8L 5000 pieces, taped and reeled, Pb-free A T A5283P-6APJ TSSOP8L 500 pieces, taped and reeled, Pb-free 3 ±0.1 0.85 ±0.05 0.1 ±0.05 specifications according to DIN technical drawings Issue: 2; 15.03.04 [...]

13 4598H–AUTO–03/07 ATA5283 10. Revision History Please note that the follo wing page numbers referred to in this section re f er to the specific revision mentioned, not to this document. Revision No. History 4598H-A UT O-03/07 • Number 5.2.1 in section 7 “Electr ical Character istics” on page 11 added 4598G-A UTO-01/07 • Put datasheet [...]

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