CONEXANT RF210B

Do not use for new designs. Use the RF212 device instead
(Data Sheet No. 100780)
RF210A and RF210B
Dual-Band, Image-Reject Downconverters For GSM Applications
The RF210A and RF210B devices are available as a dual-band front end for Global
System for Mobile Communications (GSM) handset applications. Both of these
highly integrated, monolithic devices are optimized for dual-band use in
GSM900/DCS1800 or GSM 900/PCS1900 applications. The devices include two
Low Noise Amplifiers (LNAs), two image-reject mixers, and two Local Oscillator
(LO) buffer amplifiers.
The main advantage of the RF210A and RF210B is their ability to provide 30 dB of
image rejection for both the GSM900 and the DCS1800 (or PCS1900) bands
without requiring the use of a post-LNA image reject filter. A block diagram of the
RF210(A/B) is shown in Figure 1. The device package and pin configuration are
shown in Figure 2.
Features
• LNA/image-reject mixer for RF to IF conversion
• 10 dB (RF210A) or 20 dB (RF210B) switchable
gain for GSM
• 8 dB (RF210A) or 16 dB (RF210B) switchable gain
for DCS/PCS
• 30 dB of image rejection. No post-LNA filtering
required
• High isolation LO input buffer
• Differential IF output
• High dynamic range
• Three-cell battery operation (2.7 to 5 V)
• 20-pin Thin Shrink Small Outline Package
(TSSOP)
Applications
• Dual-band digital cellular mobile telephony
(GSM900/DCS 1800 or GSM900/PCS1900)
0
LNA900IN
90
GAINSEL
90
NC
1
20
MIXVCC
LNA900GND
2
19
MIXGND
BIASGND
3
18
BYP900
LNA900IN
4
17
IFOUT+
BIASVCC
5
16
IFOUT-
LNAVCC
6
15
BYP1800
GAINSEL
7
14
BANDSEL
LNA1800IN
8
13
LOIN
LNA1800GND
9
12
LOGND
10
11
ADJMIX
IFOUT
IRM
0
LNA1800IN
LOIN
90
BIAS
BANDSEL
ENA
BYP900
C069
BYP1800
C067
Figure 2. RF210(A/B) Pin Configuration – 20-Pin TSSOP
Figure 1. RF210(A/B) Block Diagram
Data Sheet
Conexant
Proprietary Information and Specifications are Subject to Change
Doc. No. 100775A
October 20, 1999
RF210(A/B)
Image-Reject Downconverter
Technical Description
of the mixer gain can be accomplished by varying the quiescent
current on the ADJMIX pin (Pin 11). This pin can be connected
to VCC or ground through resistors. The current will increase if
the pin is connected to GND and decrease if connected to VCC.
For optimal performance, this pin should be left unconnected.
The RF210(A/B) dual-band, image-reject downconverters
implement the front-end functions of a dual-band superheterodyne receiver. These devices consist of two receive
paths, one for GSM900 and the other for DCS1800 (or
PCS1900). Each receive path contains an LNA and an imagereject mixer. The IF and LO ports are common to both receive
paths. The image-reject mixers can provide 30 dB of image
rejection for both the GSM900 and the DCS1800 (or PCS1900)
bands without using any post-LNA image reject filters.
The band of operation for RF210(A/B) is selected by the
BANDSEL signal on Pin 14. It switches the receive path
between GSM900 and DCS1800 (or PCS1900) bands.
The LNA/mixer combination has a switchable gain. The RF210A
and RF210B both have 22 dB of gain in the high gain mode. For
the RF210A, the gain is reduced by 10 dB (GSM band) and by
8 dB (DCS/PCS band) in the low gain mode. For the RF210B,
the gain is reduced by 20 dB (GSM band) and by 16 dB
(DCS/PCS band) in the low gain mode. The gain mode is
selected using the GAINSEL pin (Pin 7). Low gain mode is
selected by driving the GAINSEL signal high; high gain mode is
selected by driving the signal low. In addition, small adjustments
The device can operate from a three-cell battery pack (2.7 V to
5.0 V). Standby mode current is extremely low at 20 µA, which
maximizes handset standby time.
The signal pin assignments and functional pin descriptions are
found in Table 1. The absolute maximum ratings of the
RF210(A/B) are provided in Table 2, the operating conditions
are specified in Table 3, and electrical specifications are
provided in Table 4. Figure 3 shows the diagram for a typical
application circuit using the RF210(A/B) downconverter. Figure
4 provides the package dimensions for the 20-pin TSSOP
device and Figure 5 provides the tape and reel dimensions.
Table 1. RF210(A/B) Signal Description
Pin #
Name
Description
Pin #
Name
Description
1
NC
No connect
11
ADJMIX
Mixer bias adjust pin
2
LNA900GND
900 MHz LNA ground
12
LOGND
LO input ground
3
BIASGND
Bias ground
13
LOIN
LO input
4
LNA900IN
900 MHz LNA input
14
BANDSEL
Band selection pin
5
BIASVCC
Bias supply
15
BYP1800
Bypass capacitor for 1800 MHz band
6
LNAVCC
LNA supply
16
IFOUT–
Mixer output (negative)
7
GAINSEL
LNA gain select
17
IFOUT+
Mixer output (positive)
8
LNA1800IN
1800 MHz LNA input
18
BYP900
Bypass capacitor for 900 MHz band
9
LNA1800GND
1800 MHz LNA ground
19
MIXGND
Mixer ground
10
ENA
Device enable (active high)
20
MIXVCC
Mixer supply
Table 2. Absolute Maximum Ratings
Parameter
Storage Temperature
Minimum
Maximum
Units
–40
+125
°C
+5
dBm
LNA Input Power
2
October 20, 1999
Supply Voltage (VCC)
–0.3
+6
V
Input Voltage Range
–0.3
Vcc
V
Conexant
Proprietary Information and Specifications are Subject to Change
100775A
Image-Reject Downconverter
RF210(A/B)
Table 3. RF210(A/B) Recommended Operating Conditions
Parameter
Min
Typical
Max
Units
Supply Voltage
2.7
3.0
5.0
V
Operating Temperature
–30
+25
+85
°C
Table 4. RF210(A/B) Electrical Specifications (1 of 2)
(TA = 25 C, Vcc = 3.0 V, fIF = 400 MHz, Plo = –10 dBm)
Parameter
Test Condition
Min
Typical
Max
Units
10
mA
µA
GSM900 Mode, BANDSEL = 0
Supply current:
Enable mode
Sleep mode
ENA = 1
ENA = 0
38
RF Input frequency
935
IF frequency
350
LO frequency
1285
LO input power
400
960
MHz
450
MHz
1410
MHz
–10
LO to RF input isolation
dBm
30
Input impedance
LNA900IN = 950 MHz
dB
40 – j50
Ω
22
12
2
0.5
dB
dB
dB
dB
dB
Gain:
High gain (RF210A and RF210B)
Low gain (10 dB attenuation, RF210A)
Low gain (20 dB attenuation, RF210B)
Gain variation vs. Frequency
Gain step tracking error
GAINSEL = 0
GAINSEL = 1
GAINSEL = 1
1
0.5
Noise figure:
High gain
Low gain (12 dB gain, RF210A)
Low gain (2 dB gain, RF210B)
High gain (Note 1)
No blocker,
GAINSEL = 0
GAINSEL = 1
GAINSEL = 1
–28 dBm blocker @ 915
MHz, GAINSEL = 0
3.9
11
19
dB
dB
dB
dB
Input 1 dB compression point
–25
dBm
Input third order intercept point
–17
dBm
IF shunt resistance/side
400
Spurious response:
2(RF) x 2(LO) and 3(RF) x 3(LO)
(Note 2):
Interferer input = –75 dBm
Image rejection
100775A
3.3
9.0
17
3.9
500
–45
35
Conexant
Proprietary Information and Specifications are Subject to Change
600
Ω
dB
dB
3
October 20, 1999
RF210(A/B)
Image-Reject Downconverter
Table 4. RF210(A/B) Electrical Specifications (2 of 2)
(TA = 25 C, Vcc = 3.0 V, fIF = 400 MHz, Plo = –10 dBm)
Parameter
Test Condition
Min
Typical
Max
Units
250
mA
µA
1990
MHz
450
MHz
1640
MHz
DCS1800/PCS1900 Mode, BANDSEL = 1
Supply current:
Enable mode
Sleep mode
ENA = 1
ENA = 0
RF input frequency
42
1805
IF frequency
350
LO frequency
1355
LO to RF input isolation
400
30
Input impedance
LNA1800IN = 1900 MHz
dB
40 – j10
Ω
19
11
3
0.5
1
0.5
dB
dB
dB
dB
dB
4.5
11
16
dB
dB
dB
Gain:
High gain (RF210A and RF210B)
Low gain (8 dB attenuation, RF210A)
Low gain (16 dB attenuation, RF210B)
Gain variation vs. Frequency
Gain step tracking error
GAINSEL = 0
GAINSEL = 1
GAINSEL = 1
Noise figure:
High gain (19 dB gain, RF210A and RF210B)
Low gain (11 dB gain, RF210A)
Low gain (3 dB gain, RF210B)
High gain (19 dB gain, RF210A and RF210B)
(Note 3)
No blocker,
GAINSEL = 0
GAINSEL = 1
GAINSEL = 1
–22 dBm blocker,
GAINSEL = 0
Input 1 dB compression point
3.5
9.0
15
4.1
dB
–24
Input third order intercept point
–17
IF shunt resistance/side
400
Spurious response (Note 2):
2(RF) x 2(LO) and 3(RF) x 3(LO)
dBm
dBm
500
600
Ω
Interferer = –65 dBm
–53
Image rejection
dB
35
dB
Control Signals (All Modes)
Enable (ENA) and gain select (GAINSEL) input voltages:
VIH
VIL
1.9
Enable (ENA) and gain select (GAINSEL) input currents:
IIH
IIL
–10
20
–1
0.8
V
V
100
0
µA
µA
Enable time
15
µs
Bandselect switching time
15
µs
Note 1: Assumes 0 dBm @ 915 MHz blocker at the antenna input attenuated by 28 dB.
Note 2: The rejection is specified with respect to the desired signal gain.
Note 3: Assumes –12 dBm @ 1785 MHz blocker at the antenna input attenuated by 10 dB.
4
October 20, 1999
Conexant
Proprietary Information and Specifications are Subject to Change
100775A
Image-Reject Downconverter
RF210(A/B)
VCC
RFC
RFC
.01 µF
22 pF
.01 µF
.01 µF
RFC
22 pF
22 pF
100 pF
5
6
20
RF210
10
ENABLE
82 nH
ENA
2.2
pF
82 nH
2.2
pF
56 nH
68 nH
150 pF
Fujitsu
FAR-F5CE-947M50-D235
FL200
900 MHz GSM
2
In
Out
6.8 nH
5
1.5 pF
Ground
4
IFOUT+ 17
0
LNA900IN
68 nH
90
22 pF
7
1
2
90
IFOUT-
1 3 4 6
16
68 nH
Coil
IN2
OUT2
IN1
OUT1
Ground
6
100 nH
IF XCVR
5
100 nH
3 4 8
Siemens
400 MHz SAW Filter
(B4806)
2K
Gain Select
B4806
7
150 pF
68 nH
GAINSEL
22 pF
IRM
Fujitsu
FAR-F6CE-1G8425-L2YB
FL201
1800 MHz DCS
2
In
Out
5
Ground
1.5 nH
1.5 pF
8
0
LNA1800IN
22 pF
LOIN 13
LO
90
1 3 4 6
ADJMIX 11
NC
Band Select
2K
14
BANDSEL
1
BIAS
22 pF
BYP1800
BYP900
Ground
18
2.2 nF
15
2.2 nF
2
3
9
12 19
C070
Figure 3. Typical RF210(A/B) Application Circuit
100775A
Conexant
Proprietary Information and Specifications are Subject to Change
5
October 20, 1999
RF210(A/B)
Image-Reject Downconverter
0.65 mm
6.40 mm
Pin #1 indicator
BOTTOM VIEW
TOP VIEW
6.50±0.10 mm
1.00+0.5/-0.2 mm
1.20 mm max
1.00 mm Ref
4.40±0.10 mm
0.24+0.06/-0.05 mm
SIDE VIEW
END VIEW
0.10±0.05 mm
C003
Figure 4. RF210(A/B) Package Dimensions – 20-Pin TSSOP
8.00 ± 0.10
4.00 ± 0.10
1.50 ± 0.10
1.75 ± 0.10
2.00 ± 0.05
1.50 ± 0.25
4.00
0.292 ± 0.013
1.20
8o Max
6.75 ± 0.10
o
7 Max
1.70 ± 0.10
12.00 +0.30/-0.10
5.50 ± 0.05
Pin #1
indicator
Notes:
1. Carrier tape material: black conductive polycarbonate
2. Cover tape material: transparent conductive PSA
3. Cover tape size: 9.3 mm width
4. Tolerance: .XX = ±0.10
5. Quantity: 2500 per reel
6. All measurements are in millimeters
7.05 ± 0.10
C879
Figure 5. RF210(A/B) Tape and Reel Dimensions
6
October 20, 1999
Conexant
Proprietary Information and Specifications are Subject to Change
100775A
Image-Reject Downconverter
RF210(A/B)
Ordering Information
Model Name
Dual-Band, Image-Reject Downconverter:
10 dB switchable gain
20 dB switchable gain
Manufacturing Part
Number
Product Revision
RF210A
RF210B
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100775A
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