AD6122ACPRL 查看數據表（PDF） - Analog Devices
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AD6122ACPRL Datasheet PDF : 20 Pages
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AD6122
SSOP LPCC
Pin # Pin #
1
30
2
31
3
32
4
1
5
2
6
3, 4
7
5
8
6
9
7
10
8
11
9
12
10
13
11
14
12, 13
15
14
16
15
17
16
18
17
19
18
20
19
21
20
22
21
23
22
24
23, 24
25
25
26
26
27
27
28
28
29
Pin Label
PD1
PD2
LDOE
LDOB
LDOC
LDOGND
DGND
LOIPP
LOIPN
DVCC
TXOPP
TXOPN
TXVCC
IFGND
IFINN
IFINP
MODOPN
MODOPP
QIPP
QIPN
MODCMREF
IIPN
IIPP
IFGND
NC
IFVCC
REFOUT
REFIN
VGAIN
PIN FUNCTION DESCRIPTIONS
Description
Power-Down 1
Power-Down 2
Low Dropout Regulator Pass
Transistor Emitter Connection
Low Dropout Regulator Pass
Transistor Base
Low Dropout Regulator Pass
Transistor Collector
Low Dropout Regulator Ground
Digital Ground
Local Oscillator “Positive” Input
Local Oscillator “Negative” Input
Digital VCC
Transmit Output “Positive”
Transmit Output “Negative”
Transmit Output VCC
IF Ground
IF Input “Negative”
IF Input “Positive”
Modulator “Negative” If Output
Modulator “Positive” Output
Q Input “Positive”
Q Input “Negative”
Modulator Common-Mode
Reference Out
I Input “Negative”
I Input “Positive”
Ground
No Connect
IF VCC
Gain Control Reference Output
Gain Control Reference Input
Gain Control Voltage Input
Function
IF Amplifier Power-Down Control Input; CMOS Com-
patible; HIGH = Entire IC Powers Down, LOW = IF
Amplifiers On.
Modulator Power-Down Control Input; CMOS Compat-
ible; HIGH = Modulator Off , LOW = Modulator On.
Connects to Emitter of External PNP Pass Transistor
and VCC.
Connects to Base of External PNP Pass Transistor.
Connects to Collector of External PNP Pass Transistor.
Ground.
Ground.
Connects to Local Oscillator; AC Coupled.
Connects to Ground via Decoupling Capacitor.
Connects to Digital Supply.
Connects to Output Filter; AC Coupled.
Connects to Output Filter; AC Coupled.
Connects to LDO Output via Decoupling Network.
Ground.
IF “Negative” Input from LC Roofing Filter.
IF “Positive” Input from LC Roofing Filter.
Output Modulator Output to LC Roofing Filter.
Modulator Output to LC Roofing Filter.
Connects to Q “Positive” Output of Baseband IC.
Connects to Q “Negative” Output of Baseband IC.
Connects to CDMA Baseband Converter Tx DAC
Common-Mode Reference Input.
Connects to I “Negative” Output of Baseband IC.
Connects to I “Positive” Output of Baseband IC.
Connects to IF Ground.
Connects to Decoupled Output of LDO Regulator.
Provides 1.23 V Voltage Reference Output for DAC in
CDMA Baseband Converter and REFIN.
Accepts 1.23 V Reference Input from REFOUT or
External Reference.
Accepts Gain Control Input Voltage from External DAC.
Max Gain = 2.5 V; Min Gain = 0.5 V.
–4–
REV. B
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