MAS9081 Просмотр технического описания (PDF) - Micro Analog systems
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MAS9081 Datasheet PDF : 12 Pages
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DA9081.006
1 August, 2005
PIN CONFIGURATION & TOP MARKING FOR PLASTIC TSSOP-16 PACKAGE
VDD
QO2
QO1
NC
QI
AGC
PDN2
OUT
VSS
RFI2
RFIM
RFIP
NC
PDN1
AON
DEC
Top Marking Definitions:
z = Version Number
YYWW = Year Week
PIN DESCRIPTION
Pin Name
Pin
Type
Function
VDD
1
P
Positive Power Supply
QO2
2
AO
Quartz Filter Output for Crystal 2
QO1
3
AO
Quartz Filter Output for Crystal 1
NC
4
QI
5
AI
Quartz Filter Input for Crystal and External
Compensation Capacitor
AGC
6
AO
AGC Capacitor
PDN2
7
DI
Power Down/Frequency Selection Input 2
OUT
8
DO
Receiver Output
DEC
9
AO
Demodulator Capacitor
AON
10
DI
AGC On Control
PDN1
11
DI
Power Down/Frequency Selection Input 1
NC
12
RFIP
13
AI
Positive Receiver Input
RFIM
14
AI
Negative Receiver Input
RFI2
15
AI
Receiver Input 2 (for Antenna Capacitor 2)
VSS
16
G
Power Supply Ground
A = Analog, D = Digital, P = Power, G = Ground, I = Input, O = Output, NC = Not Connected
Note
1
2
3
4
4
Notes:
1) Pin 4 between quartz crystal filter pins must be connected to VSS to eliminate package leadframe parasitic
capacitances disturbing the crystal filter performance. All other NC (Not Connected) pins are also
recommended to be connected to VSS to minimize noise coupling.
2) OUT = VSS when carrier amplitude at maximum; OUT = VDD when carrier amplitude is reduced
(modulated)
- the output is a current source/sink with |IOUT| > 5 µA
- at power down the output is pulled to VSS (pull down switch)
3) AON = VSS means AGC off (hold current gain level); AON = VDD means AGC on (working)
- Internal pull-up (to AGC on) with current < 1 µA which is switched off at power down
4) Differential input versions A1..A5 have 600 kΩ biasing MOSFET-transistors towards ground from both
receiver inputs RFIP and RFIM. Asymmetric input versions AB..AF have input pin RFIM unconnected.
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