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PDF RF2689 Data sheet ( Hoja de datos )
| Número de pieza | RF2689 | |
| Descripción | W-CDMA/GSM/DCS RECEIVE AGC AND DEMODULATOR | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RF2689 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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Preliminary
7
Typical Applications
• Multimode W-CDMA/GSM/DCS/EDGE
• W-CDMA Systems
RF2689
W-CDMA/GSM/DCS RECEIVE AGC
AND DEMODULATOR
• GSM Systems
Product Description
The RF2689 is an integrated complete IF AGC amplifier
and quadrature demodulator designed for the receive
section of W-CDMA and GSM/DCS applications. It is
designed to amplify received IF signals, while providing
70dB of gain control range, a total of 90dB gain, and
demodulate to baseband I and Q signals. This circuit is
designed as part of RFMD’s multimode W-CDMA/GSM/
DCS chipset, which also includes the RF2688 W-CDMA/
GSM/DCS transmit modulator and IF AGC/Upconverter.
The IC is manufactured on an advanced 25GHz FT Sili-
con Bi-CMOS process, and is packaged in a 20-pin,
4mmx4mm, leadless chip carrier.
1.00
0.90
0.60
0.24 typ
3 0.20
4.00
sq.
0.65
0.30
4 PLCS
2.10
sq.
12°
MAX
0.75
0.50
0.05
0.50
Dimensions in mm.
NOTES:
1 Shaded lead is Pin 1.
Note orientation of package.
2 Pin 1 identifier must exist on top surface of package by identification
mark or feature on the package body. Exact shape and size is optional.
3 Dimension applies to plated terminal: to be measured between 0.02 mm
and 0.25 mm from terminal end.
4 Package Warpage: 0.05 mm max.
5 Die Thickness Allowable: 0.305 mm max.
0.23
0.13
4 PLCS
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
GSM IN+ 2
GSM IN- 3
W-CDMA IN+ 4
W-CDMA IN- 5
DIV2
20 1 17 18
Gain
Control
I/Q Cal
DIV2
Div
12 or 4
Mode Control
& Biasing
14 I OUT+
13 I OUT-
15 CALEN
16 FCLK
12 Q OUT+
11 Q OUT-
19 VREF2V
68
7 9 10
Package Style: LCC, 20-Pin, 4x4
Features
• Digitally Controlled Power Down Mode
• 2.7V to 3.3V Operation
• Digital LO Quadrature Divide-by-8
• IF AGC Amp with 70dB Gain Control
• 80dB Maximum Voltage Gain
Ordering Information
RF2689
W-CDMA/GSM/DCS Receive AGC and Demodulator
RF2689 PCBA Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
7
Rev A4 010815
7-39
1 page  
Preliminary
RF2689
Mode Control
Logic
EN RX
Chip Enable
If EN =0 then the whole IC is powered down
Mode Control Truth Table
Mode
Power Down
GSM/DCS RX Warm-Up
GSM/DCS RX
W-CDMA RX Warm-Up
W-CDMA RX
EN RX
0
1
1
1
1
Mode B
X
0
1
0
1
Mode A
X
1
1
0
0
Auto Calibration Mode
The filters are automatically tuned when the CALEN pin goes high. The filters are reset to a nominal value whenever the
CALEN pin goes low. The auto calibration circuitry is independent of the “Mode A/B” and the EN RX control pins.
The EN RX and CALEN pins can be connected together if desired.
Truth Table
Mode
Power Down
GSM/DCS RX Warm-Up
GSM/DCS RX
W-CDMA RX Warm-Up
W-CDMA RX
W-CDMA GSM Input Amp
Input Amp & 1st Mixer
00
00
01
00
10
Fixed
Divider
0
1
(div 2)
1
(div 2)
1
(div 2)
1
(div 2)
GSM
Divider
0
0
(div 2)
1
(div 2)
0
0
Second
Dividers
0
0
(div 12)
1
(div 12)
1
(div 4)
0
(div 4)
VGA
0
0
1
0
1
Demod
0
0
1
0
1
Baseband
& Filters
0
0
1
(250 kHz)
0
1
(2.5 MHz)
7
Rev A4 010815
7-43
5 Page 
Preliminary
RF2689
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
TP1 TP2 TP3
JP3
VREF2V IFP
IFN
Drawing 2689400 Rev -
VGC
J1
GSM
J2
WCDMA
JP1
8
7
6
5
4
3
+5V 1
-5V 2
C21 +
1 uF(16V)
+ C22
3
1 uF(16V)CON3
C8
1 nF
C9
100 pF
C11
10 pF
TP4
ENCAL I OUT P
R1
10 kΩ
C1
50 Ω µstrip 6 pF
L1
68 nH
C3* C5
DNI 100 pF
R6
680 Ω
* 20 19 18 17 16 *
1 15
2 14
3 13
C12
100 nF
R12*
DNI
TP5
I OUT N
C13
100 nF
C2
50 Ω µstrip5.1 pF
C4*
DNI
L2
150 nH
C6
100 pF
R7
680 Ω
4 12
5 11
* 6 7 8 9 10 *
TP6
Q OUT P
C18
100 nF
R13* C19
DNI 100 nF
C10
ENRX 10 nF
ENCAL
MODEB
MODEA
VCC MODEA
MODEB
ENRX TP7
Q OUT N
C20
100 pF
50 Ω µstrip
C23*
DNI
C24*
DNI
+5V
C14
100 nF
R2
10 kΩ
R3
10 kΩ
R4
10 kΩ
R5
10 kΩ
R14
20 kΩ
7
3+
U2
86
2- 5
4
CLC426
R15
20 kΩ
+5V C16
R16 100 nF
20 kΩ
7
3+
U3
86
2- 5
4
CLC426
R17
20 kΩ
2 VGC
1
HDR 8
+ C7
1 uF
VCC
Note: Parts with * following reference designator should not be populated on evaluation board.
R18
51 Ω
C15
100 nF
R19
51 Ω
C17
100 nF
R11 R10 R9 R8
1M 1M 1M 1M
50 Ω µstrip
50 Ω µstrip
J3
FCLK
J5
IOUT
-5V
J6
QOUT
-5V
J4
LO IN
7
Rev A4 010815
7-49
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet RF2689.PDF ] | |
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