RFMD2080 Datasheet, PDF (4/19 Pages) RF Micro Devices – 45MHz TO 2700MHz IQ MODULATOR WITH SYNTHESIZER/VCO AND BASEBAND INTERFACE`

RFMD2080
Pin
Name
1
ENBL/GPO5
2
EXT_LO
3
EXT_LO_DEC
4
REXT
5
ANA_VDD1
6
LFILT1
7
LFILT2
8
LFILT3
9
MODE/GPO6
10
REF_IN
11
NC
12
TM
13
RF_OUT_N
14
RF_OUT_P
15
GPO1/ADD1
16
GPO2/ADD2
17
DIG_VDD
18
MOD_Q_N
19
MOD_Q_P
20
NC
21
NC
22
MOD_I_N
23
MOD_I_P
24
ANA_VDD2
25
GPO3
26
GPO4/LD/DO
27
NC
28
NC
29
RESETX
30
ENX
31
SCLK
32
SDATA
Exposed Paddles
Pin Names and Descriptions
Description
Device Enable pin (see note 1 and 2).
External local oscillator input. Use AC coupling capacitor.
Decoupling pin for external local oscillator. Use AC coupling capacitor.
External bandgap bias resistor (see note 3).
Analog supply. Use good RF decoupling.
Phase detector output. Low-frequency noise-sensitive node.
Loop filter op-amp output. Low-frequency noise-sensitive node.
VCO control input. Low-frequency noise-sensitive node.
Mode select pin (see notes 1 and 2).
Reference input. Use AC coupling capacitor.
Connect to ground.
Differential output (see note 5).
Differential output (see note 5).
General purpose output / MultiSlice address bit.
General purpose output / MultiSlice address bit.
Digital supply. Should be decoupled as close to the pin as possible.
Modulator Q differential input (see note 4).
Modulator Q differential input (see note 4).
Modulator I differential input (see note 4).
Modulator I differential input (see note 4).
Analog supply. Use good RF decoupling.
General purpose output
General purpose output / Lock detect output / serial data out.
Chip reset (active low). Connect to DIG_VDD if asynchronous reset is not required.
Serial interface select (active low) (See note 1).
Serial interface clock (See note 1).
Serial interface data (See note 1).
Ground reference, should be connected to PCB ground through a low impedance path.
Notes:
1. An RC low pass filter may be used on this line to reduce digital noise.
2. If the device is under software control this input can be configured as a general purpose output (GPO).
3. Connect a 51K resistor from this pin to ground. This pin is sensitive to low frequency noise injection.
4. DC bias voltage and modulation should be applied to this pin.
5. This pin must be connected to ANA_VDD2 using an RF choke or center tapped transformer (see application schematic).
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DS140110