Philips Semiconductors RF Communications Products
Product specification
Low voltage LNA, mixer and VCO 鈥?1GHz
SA620
DESCRIPTION
The SA620 is a combined RF amplifier, VCO
with tracking bandpass filter and mixer
designed for high-performance low-power
communication systems from 800-1200MHz.
The low-noise preamplifier has a 1.6dB noise
figure at 900MHz with 11.5dB gain and an
IP3 intercept of -3dBm at the input. The gain
is stabilized by on-chip compensation to vary
less than
鹵0.2dB
over -40 to +85擄C
temperature range. The wide-dynamic-range
mixer has an 9dB noise figure and IP3 of
鈥?dBm at the input at 900MHz. An external
LO can be used in place of the internal VCO
for improved mixer input IP3 and a 3mA
reduction in current. The chip incorporates a
through-mode option so the RF amplifier can
be disabled and replaced by an attenuator
(S
21
= 鈥?.5dB). This is useful for improving
the overall dynamic range of the receiver
when in an overload situation. The nominal
current drawn from a single 3V supply is
10.4mA and 7.2mA in the thru-mode.
Additionally, the VCO and Mixer can be
powered down to further reduce the supply
current to 1.2mA.
FEATURES
鈥?/div>
Low current consumption: 10.4mA nominal,
7.2mA with thru-mode activated
PIN CONFIGURATION
DK Package
LNA ENABLE 1
LNA GND 2
LNA IN 3
LNA GND 4
LNA GND
5
20 V
CC
19 LNA GND
18 LNA OUT
17 LNA BIAS
16 MIXER IN
15 MIXER GND
14 MIXER BYPASS
13 MIXER OUT
12 OSC GND
11 VCO OUT
鈥?/div>
Outstanding noise figure: 1.6dB for the
amplifier and 9dB for the mixer at 900MHz
鈥?/div>
Excellent gain stability versus temperature
and supply voltage
鈥?/div>
Switchable overload capability
鈥?/div>
Independent LNA, mixer and VCO power
down capability
OSC GND 6
MIXER PWRDN
OSC PWRDN
7
8
鈥?/div>
Internal VCO automatic leveling loop
鈥?/div>
Monotonic VCO frequency vs control
voltage
OSC1 9
OSC2 10
APPLICATIONS
鈥?/div>
900MHz cellular front-end
鈥?/div>
900MHz cordless front-end
鈥?/div>
Spread spectrum receivers
鈥?/div>
RF data links
鈥?/div>
UHF frequency conversion
鈥?/div>
Portable radio
TEMPERATURE RANGE
-40 to +85
擄
C
ORDER CODE
SA620DK
DWG #
1563
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Shrink Small Outline Package (Surface-mount, SSOP)
BLOCK DIAGRAM
V
CC
LNA
GND
LNA
OUT
LNA
BIAS
MIXER
IN
MIXER
GND
MIXER
BYPASS
MIXER
OUT
OSC
GND
VCO
OUT
20
19
18
17
16
15
14
13
12
11
RF
IF
LO
TRACKING
BANDPASS
FILTER
LNA
AUTOMATIC
LEVELING
LOOP
VCO
1
LNA
ENABLE
2
LNA
GND
3
LNA IN
4
LNA
GND
5
LNA
GND
6
OSC
GND
7
MIXER
PWRDN
8
OSC
PWRDN
9
OSC1
10
OSC2
December 15, 1993
2
853-1725 11658
SA620DK 產(chǎn)品屬性
NXP
上下轉(zhuǎn)換器
4.5 dB
3.3 V, 5 V
980 mW
+ 85 C
SMD/SMT
SSOP-20
- 40 C
Tube
75
SA620DK,112
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