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PDF UAA2077CM Data sheet ( Hoja de datos )
| Número de pieza | UAA2077CM | |
| Descripción | 2 GHz image rejecting front-end | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
UAA2077CM
2 GHz image rejecting front-end
Product specification
Supersedes data of 1996 Oct 02
File under Integrated Circuits, IC17
1997 Sep 24
1 page  
Philips Semiconductors
2 GHz image rejecting front-end
Product specification
UAA2077CM
FUNCTIONAL DESCRIPTION
Receive section
The circuit contains a low-noise amplifier followed by two
high dynamic range mixers. These mixers are of the
Gilbert-cell type, the whole internal architecture is fully
differential.
The local oscillator, shifted in phase to 45° and 135°,
mixes the amplified RF to create I and Q channels.
The two I and Q channels are buffered, phase shifted by
45° and 135° respectively, amplified and recombined
internally to realize the image rejection.
Pin SBS allows sideband selection:
• fLO > fRF (SBS = 1)
• fLO < fRF (SBS = 0).
Where fRF is the frequency of the wanted signal.
Balanced signal interfaces are used for minimizing
crosstalk due to package parasitics.
The IF output is differential and of the open-collector type.
Typical application will load the output with a 680 Ω
resistor load at each IF output, plus a differential 1 kΩ load
made of the input impedance of the IF filter or the input
impedance of the matching network for the IF filter.
The power gain refers to the available power on this 1 kΩ
load. The path to VCC for the DC current should be
achieved via tuning inductors. The output voltage is limited
to VCC + 3Vbe or 3 diode forward voltage drops.
Fast switching, ON/OFF, of the receive section is
controlled by the hardware input RXON.
handbook, full pagewidth
VCCLNA
RFINA
RFINB
LNAGND
LNA
MIXER
IF
amplifier
MIXER
IF
amplifier
LOIN
+45o
SBS
IF
COMBINER
+135o
RXON
IFA
IFB
MGD754
Fig.3 Block diagram, receive section.
1997 Sep 24
5
5 Page 
Philips Semiconductors
2 GHz image rejecting front-end
Product specification
UAA2077CM
INTERNAL PIN CONFIGURATION
DC
PIN
SYMBOL
VOLTAGE
(V)
1 TXINA 2.15
2 TXINB 2.15
5 RFINA
2.0
EQUIVALENT CIRCUIT
VCC
1, 5 2, 6
6 RFINB
2.0
3 VCCLNA 3.75
8 LNAGND
0
9 SXON
10 SBS
11 TXON
12 RXON
13 LOINB
2.9
9, 10, 11, 12
GND
MGL205
VCC
GND
MGL204
VCC
14 LOINA
2.9
15 VCCLO
3.75
16 LOGND
0
13
14
GND
MGL206
1997 Sep 24
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet UAA2077CM.PDF ] | |
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