ATA3745P3-TGQY Atmel, ATA3745P3-TGQY Datasheet - Page 6

• Manufacturer Part Number: ATA3745P3-TGQY
• Description: IC UHF ASK/FSK RECEIVER 20SOIC
• Manufacturer: Atmel

Specifications of ATA3745P3-TGQY

• Frequency: 310MHz ~ 440MHz
• Sensitivity: -108dBm
• Data Rate - Maximum: 10 kBaud
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, TPM, Security Systems
• Current - Receiving: 7mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: ATA3745P3-TGQYTR

Figure 3-2.
Figure 3-3.
6
RF
f
ATA3745
RF
IN
= 433.92 MHz
8.2 pF
f
RF
Input Matching Network With SAW Filter
Input Matching Network Without SAW Filter
22 pF
RF
IN
C
C
= 433.92 MHz
3
2
15 pF
TOKO ® LL2012
3.3 pF
F33NJ
33 nH
22 nH
L
2
L
25 nH
Please note that for all coupling conditions (see
inductivity of the LNA ground is compensated. C3 forms a series resonance circuit together
with the bond wire. L = 25 nH is a feed inductor to establish a DC path. Its value is not critical
but must be large enough not to detune the series resonance circuit. For cost reduction, this
inductor can be easily printed on the PCB. This configuration improves the sensitivity of the
receiver by about 1 dB to 2 dB.
1
2
TOKO ® LL2012
IN
IN_GND
100 pF
25 nH
F22NJ
100 pF
8
9
C
16
LNAGND
LNA_IN
27 nH
CASE_GND
ATA3745
3, 4
B3555
L
8
9
3
LNAGND
LNA_IN
7, 8
ATA3745
TOKO ® LL2012
OUT_GND
F27NJ
8.2 pF
C
OUT
17
5
6
RF
IN
f
RF
RF
47 pF
10 pF
f
RF
IN
C
= 315 MHz
C
3
2
= 315 MHz
33 pF
TOKO ® LL2012
3.3 pF
F82NJ
82 nH
L
39 nH
Figure 3-2
2
L
25 nH
1
2
TOKO ® LL2012
IN
IN_GND
100 pF
25 nH
F39NJ
100 pF
8
9
and
C
16
LNAGND
LNA_IN
47 nH
CASE_GND
ATA3745
3, 4
B3551
Figure
L
8
9
3
LNAGND
LNA_IN
7, 8
ATA3745
TOKO ® LL2012
OUT_GND
3-3), the bond wire
F47NJ
22 pF
C
OUT
17
4901B–RKE–11/07
5
6