Data Sheet Skyworks Doc. No. 101244B
Proprietary Information and Specifications are Subject to Change June 4, 2002
RF210-51
Image-Reject Front End for Dual-Band GSM Applications
The RF210-51 device is available as a dual-band (EGSM900/DCS1800) front end
for Global System for Mobile Communications™ (GSM™) mobile telephony
applications. The device integrates all the required front-end components after the
frequency pre-select filters. The components include the Low Noise Amplifiers
(LNAs), the internal image-reject filters, mixers, and a Local Oscillator (LO)
amplifier.
The main advantage of the RF210-51 is its ability to provide a minimum of 35 dB of
image rejection for each band. The device block diagram is shown in Figure 1. The
device package and pin configuration is shown in Figure 2.
Distinguishing Features
• Supports EGSM
• LNA and mixer for RF to IF conversion
• 12 dB or 20 dB switchable gain step
• Minimum 35 dB of image rejection
• No external post-LNA filters required
• Common Intermediate Frequency (IF) port for both
bands
• IF range from 350 MHz to 450 MHz
• High isolation LO input buffer
• Differential IF output
• High dynamic range with low current consumption
• Three-cell battery operation (2.7 to 3.6 V)
• 20-pin Exposed paddle, Thin Shrink Small Outline
Package (ETSSOP)
Applications
• Dual-band digital cellular mobile telephony
(EGSM900/DCS1800)
LNA1800IN
LNA900IN IFout
Gain
Sel
control Band Select 1
Step
Sel
C0002
LOIN
Figure 1. RF210-51 Device Block Diagram
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
GND
GND
LNA900IN
GAINSEL
LNA1800IN
GND
ENA
VCC
GND
STEPSEL
C067
IFOUT+
IFOUT-
GND
BANDSEL1
LOIN
LOGND
NC
VCC
VCC
Figure 2. RF210-51 Device Pin Configuration −
−−
− 20-Pin ETSSOP
RF210-51 Image-Reject Front End
2 Skyworks 101244B
Proprietary Information and Specifications are Subject to Change June 4, 2002
Technical Description
The RF210-51 device forms the front end of a dual-band super-
heterodyne receiver. The RF210-51 dual-band device is
optimized for an EGSM900/DCS1800 design. Each frequency
band has its own separate front-end receiver path. Each
receiver path contains an LNA, an image-reject filter, and a
mixer. The IF and LO ports are common to both frequency
bands. The image rejection achievable by this front-end design
without any additional external components is 35 dB minimum
for an IF of 400 MHz. The device operates over a supply voltage
range of 2.7 V to 3.6 V.
The RF210-51 dual-band device has one band selection pin
(BANDSEL1 on pin 14). When BANDSEL1 is set to logic “0,” the
EGSM900 receiver path is active. The LO frequency needs to
be higher than the RF input frequency, that is, a high side
injection is used. When BANDSEL1 is set to logic “1,” the
DCS1800 receiver path is active. The LO frequency needs to be
less than the RF input frequency, that is, a low-side injection is
used. With a 400 MHz IF, this arrangement allows a single,
wide-range Voltage Controlled Oscillator (VCO) to be used for
each band of operation. Table 1 provides the frequency band
selection settings for the dual-band device.
All the LNAs have switchable gain. The gain mode is selectable
using the GAINSEL signal (pin 7). Low gain mode is selected by
driving the GAINSEL signal to a logic “1”; high gain mode is
selected by driving the signal to a logic “0.” Depending on the
need of the handset design on the gain distribution, the gain
step between the high gain and low gain modes can be set to
either a 12 dB step or a 20 dB step. This gain step is selectable
with the STEPSEL signal (pin 18).
Electrical and Mechanical Specifications ________________
The RF210-51 signal pin assignments and functional pin
descriptions are found in Table 2. The absolute maximum
ratings of the RF210-51 are provided in Table 3, the
recommended operating conditions are specified in Table 4.
Electrical specifications are provided in Table 3. Figure 3 shows
the diagram for a typical application circuit using the RF210-51
front end. Figure 4 provides the package dimensions for this
20-pin ETSSOP device.
ESD Sensitivity
The RF210-51 is a static-sensitive electronic device. Do not
operate or store near strong electrostatic fields. Take proper
ESD precautions.
Table 1. RF210-51 Band Selection
BANDSEL1, pin 14 Mode
0 EGSM900
1 DCS1800
Table 2. RF210-51 Device Signal Description
Pin # Name Description Pin # Name Description
1 NC No connect (recommend connecting to ground) 11 NC No connect (recommend connecting to ground)
2 GND Ground 12 LOGND LO input ground
3 GND Ground 13 LOIN LO input
4 LNA900IN 900 MHz LNA input 14 BANDSEL1 Band select control
5 VCC Supply 15 GND Ground
6 VCC Supply 16
IFOUT− Mixer negative output
7 GAINSEL LNA gain select 17 IFOUT+ Mixer positive output
8 LNA1800IN 1800 MHz LNA input 18 STEPSEL Gain step select. STEPSEL= 0 selects a 12 dB
gain step; STEPSEL = 1 selects a 20 dB gain step
9 GND Ground 19 GND Ground
10 ENA Device enable, active high 20 VCC Supply
Image-Reject Front End RF210-51
101244B Skyworks 3
June 4, 2002 Proprietary Information and Specifications are Subject to Change
Table 3. Absolute Maximum Ratings
Parameter Minimum Maximum Units
Storage Temperature –40 +125 °C
Supply Voltage (VCC) –0.3 +3.6 V
Input Voltage Range –0.3 Vcc V
Table 4. RF210-51 Recommended Operating Conditions
Parameter Min Typical Max Units
Supply Voltage 2.7 3.0 3.6 V
Operating Temperature –30 +25 +85 °C
Table 5. RF210-51 Electrical Specifications (1 of 2)
(TA = 25 °
°°
°C, Vcc = 2.7 V, fIF = 400 MHz, Plo = −
−−
−10 dBm)
Parameter Symbol Test Condition Min Typical Max Units
EGSM900 Mode
Supply current:
Enable mode
Sleep mode
ENA = 1
ENA = 0
15
30
mA
µA
RF Input frequency 925 960 MHz
IF frequency fif 350 400 450 MHz
LO to RF input isolation 30 dB
Input impedance 50 Ω
Power gain (for 2 kΩ differential output impedance):
High gain mode
Low gain mode 1
Low gain mode 2
Gain step 1
Gain step 2
Temperature coefficient
Gain variation versus frequency
Gmax1
Gmin1
Gmin2
Gstep1
Gstep2
Ftc1
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
20
–24
–14
22
0
10
–22
–12
–0.02
25
–20
–10
0.8
dB
dB
dB
dB
dB
dB/°C
dB
Noise figure:
High gain
Low gain mode 1
Low gain mode 2
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
2.3
18
10
3.5
dB
dB
dB
Noise figure degradation with blocker:
High gain
−22 dBm blocker,
GAINSEL = 0 (Note 1)
1.6
dB
Input 1 dB compression point IP1dB high gain mode
low gain mode
–22
–18
–20
–13
dBm
dBm
Input third order intercept point IP3 –12 dBm
Differential IF shunt output resistance 2 kΩ
Image rejection:
f
IF = 400 MHz
f
IF = 350 or 450 MHz
35
25
50
dB
dB
RF210-51 Image-Reject Front End
4 Skyworks 101244B
Proprietary Information and Specifications are Subject to Change June 4, 2002
Table 5. RF210-51 Electrical Specifications (2 of 2)
(TA = 25 °
°°
°C, Vcc = 2.7 V, fIF = 400 MHz, Plo = −
−−
−10 dBm)
Parameter Symbol Test Condition Min Typical Max Units
DCS1800 Mode
Supply current:
Enable mode
Sleep mode
ENA = 1
ENA = 0
19
30
mA
µA
RF input frequency 1805 1880 MHz
IF frequency 350 400 450 MHz
LO to RF input isolation 30 dB
Input impedance 50 Ω
Power gain (for 2 kΩ differential output impedance):
High gain mode
Low gain mode 1
Low gain mode 2
Gain step 1
Gain step 2
Temperature coefficient
Gain variation versus frequency
Gmax1
Gmin1
Gmin2
Gstep1
Gstep2
Ftc1
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
20
–22
–14
22
2
10
–20
–12
–0.02
25
–18
–10
1.2
dB
dB
dB
dB
dB
dB/°C
dB
Noise figure:
High gain
Low gain mode 1
Low gain mode 2
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
3.5
16.5
11
4.5
dB
dB
dB
Noise figure degradation with blocker:
High gain
−22 dBm blocker,
GAINSEL = 0 (Note 2)
1.6
dB
Input 1 dB compression point IP1dB high gain mode
low gain mode
–23
–20
–20
–16
dBm
dBm
Input third order intercept point IP3 –12 dBm
Differential IF shunt output resistance 2 kΩ
Image rejection:
f
IF = 400 MHz
f
IF = 350 or 450 MHz
35
25
40
dB
dB
Local Oscillator (LO)
LO frequency 1275 1640 MHz
LO input return loss (with external matching circuit) fIF = 400 MHz –10 dB
LO input power Plo –15 –10 –5 dBm
Control Signals (All Modes)
Digital input voltages (ENA, GAINSEL, BANDSEL1,
BANDSEL2, and STEPSEL)
Vih
Vil
Vcc –
0.4
0.4
V
V
Enable time ton 10 µs
Bandselect switching time 15 µs
Note 1: Assumes −5 dBm @ 915 MHz blocker at the antenna input attenuated by 17 dB.
Note 2: Assumes −12 dBm @ 1785 MHz blocker at the antenna input attenuated by 10 dB.
Image-Reject Front End RF210-51
101244B Skyworks 5
June 4, 2002 Proprietary Information and Specifications are Subject to Change
LNA900IN
LNA1800IN
LNA1900IN
GAINSEL
ENABLE
LOIN
IFOUT-
IFOUT+
Bias
EGSM Rx filter
DCS Rx Filter
BANDSEL1
BANDSEL2
STEPSEL
Control
7
4
8
9
10
19
13
18
15
14
16
17
20
6
5
2312
Vcc
22 pF
22 pF
2000
10 10
2000
2000
2000
2000
47 pF
12 nH
22 pF
4.7 nH
27 pF
22 pF
L1
82 nH
L2
82 nH
2.2 µF
10 pF
22 pF
100 pF
100 pF
12 pF
1.5 pF
3.0 nH
PCS Rx Filter
1.2 pF
3.0 nH
to
IF SAW
match
2 k || (L1+L2)
differential
C903
Figure 3. Typical RF210-51 Application Circuit
6.50±0.10 mm
4.40±0.10 mm 0.10±0.05 mm
SIDE VIEW
END VIEW
TOP VIEW
1.00+0.5/-0.2 mm
0.24+0.06/-0.05 mm
1.00 mm Ref
1.20 mm max
base metal
Pin 1 indicator
6.40 mm
0.65 mm
123
BOTTOM VIEW
3.0 mm
4.20 mm
123
C003
Figure 4. RF210-51 Package Dimensions −
−−
− 20-Pin ETSSOP
RF210-51 Image-Reject Front End
6 Skyworks 101244B
Proprietary Information and Specifications are Subject to Change June 4, 2002
Ordering Information
Model Name Manufacturing Part
Number
Dual-Band Image-Reject Front End RF210-51
© 2002, Skyworks Solutions, Inc. All Rights Reserved.
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