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4994BS–AUDR–05/08
ATR4262M1 [Preliminary]
2. Pin Configuration
Figure 2-1. Pinning QFN48
AMIN1
AMIN2
AMCVC
AMPIND
SW1
FMPIND
FMIN1
FMIN12
FMIN2
DAC1
DAC2
SW2
SW3
IFOUT1
IFOUT2
VSPLL
REF1
REF2
VRPLL
AMLF
FMLF
VTUNE
GNDPLL
VCOBUF
AMOUT1
AMOUT2
AMAGCTC1
FMOUT1
FMOUT2
VST
IFIN1
IFREF
IFIN2
VRT
IFIN3
AMAGCT2
FMAGCTC
KAGC
IFGCL
IFGCM
ENABLE
SDA
SCL
AFCC
VRVCO
VCOB
VCOE
GNDVCO
48 47 46 45 44 43 42 41 40 39 38 37
13 14 15 16 17 18 19 20 21 22 23 24
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
ATR4262M1
Table 2-1. Pin Description
Pin Symbol Function
1 AMIN1 AM mixer input
2 AMIN2 AM mixer input
3 AMCVC AM cascode voltage output
4 AMPIND AM pin diode output
5 SW1 SW1 switching output
6 FMPIND FM pin diode output
7 FMIN1 FM mixer input 1
8 FMIN12 FM mixer input 12
9 FMIN2 FM mixer input 2
10 DAC1 DAC tuning voltage output 1
11 DAC2 DAC tuning voltage output 2
12 SW2 SW2 switching output/external tuning voltage input
13 FMAGCTC RF AGC FM time constant
14 KAGC Keyed AGC input/SW7/lock detect/AFSAMPLE
15 IFGCL IF gain control LSB/SW4
16 IFGCM IF gain control MSB/SW5
17 ENABLE Control bus ENABLE/address select
18 SDA Two-wire control bus SDA
19 SCL Two-wire control bus SCL