ATR2731 Datasheet, PDF (5/26 Pages) ATMEL Corporation – DAB One-chip Front End

Table 2-1.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Pin Description
Symbol Function
SCL Clock (simple two-wire bus)
SDA Data (simple two-wire bus)
SWA Switching output (open collector)
SWB Switching output (open collector)
FREF Reference frequency output (for ATR2731)
SWC Switching output (open collector)
CAO Output of D/A converter A
CCO Output of D/A converter B
CBO Output of D/A converter C
GND Ground
GND Ground
RFA1 Input 1 of RF amplifier A (differential)
RFA2 Input 2 of RF amplifier A (differential)
RFB1 Input 1 of RF amplifier B (differential)
RFB2 Input 2 of RF amplifier B (differential)
CPRF Charge-pump output (RF AGC block)
GND Ground
SAW1 SAW driver output 1 (differential)
SAW2 SAW driver output 2 (differential)
VS
Supply voltage RF part
SLI
AGC mode selection (charge-pump current high)
WAGC AGC mode selection (charge-pump current off)
IFIN2 Input 2 of IF amplifier (differential)
IFIN1 Input 1 of IF amplifier (differential)
VS
Supply voltage IF part
IFAGCIN2 Input 2 of IF AGC block (differential)
IFAGCIN1 Input 1 of IF AGC block (differential)
CPIF Charge-pump output (IF AGC block)
IFOUT IF output (single ended)
GND Ground
GND Ground
C1VC Collector 1 of VCO
B2VCO Base 2 of VCO
B1VCO Base 1 of VCO
C2VC Collector 2 of VCO
GND Ground
GND Ground
VS
Supply voltage PLL
PD
Tri-state charge pump output
VD
Active filter output
PLCK Lock-indicating output (open collector)
OSCI Input of reference oscillator/buffer
OSCO Output of reference oscillator/buffer
ADR Address selection (simple two-wire bus)
4904A–DAB–03/06
ATR2731
5