SA621 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
SA621 Datasheet PDF : 16 Pages
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Philips Semiconductors
1GHz low voltage LNA, mixer and VCO
Product specification
SA621
DESCRIPTION
The SA621 is a combined low-noise amplifier, mixer and VCO
designed for high-performance low-power communication systems
from 800-1000MHz. The low-noise preamplifier has a 1.7dB noise
figure at 881MHz with 15dB gain and an IP3 intercept of -7dBm at
the input. The gain is stabilized by on-chip compensation to vary
less than ±0.2dB over -40 to +85°C temperature range. The
wide-dynamic-range mixer has a 12dB noise figure and IP3 of
+4.5dBm at the input at 881MHz. The integrated VCO circuit with
external resonator produces a high quality LO signal that drives the
mixer and is buffered to an external PLL synthesizer IC. The
nominal current drawn from a single 3V supply is 13.3mA.
Additionally, the entire circuit can be powered down to further reduce
the supply current to less than 20µA.
FEATURES
• Low current consumption
• Outstanding gain and noise figure
• Excellent gain stability versus temperature and supply voltage
• LNA, mixer and VCO power down capability
• Monotonic VCO frequency vs control voltage
ORDERING INFORMATION
DESCRIPTION
20-Pin Thin Shrink Small Outline Package (Surface-mount, TSSOP)
PIN CONFIGURATION
PD1 1
PD2 2
GND 3
LO OUT 4
GND 5
GND 6
TANK 7
GND 8
GND 9
BYPASS 10
20 MIXER OUT
19 MIXER OUT
18 GND
17 MIXER IN
16 GND
15 LNA IN
14 GND
13 LNA OUT
12 VCC
11 GND
Figure 1. Pin Configuration
APPLICATIONS
• 900MHz cellular and cordless front-end
• Spread spectrum receivers
• RF data links
• UHF frequency conversion
• Portable radio
SR01429
TEMPERATURE RANGE
-40 to +85°C
ORDER CODE
SA621DH
DWG #
SOT360-1
BLOCK DIAGRAM
MIXER MIXER
MIXER
LNA
LNA
OUT
OUT
GND
IN
GND
IN
GND
OUT
VCC
GND
20
19
10pF
10pF
18
17
16
15
14
13
12
11
LNA
1997 Nov 07
1
2
3
4
5
6
7
8
9
10
PD1
PD2
GND
LO
OUT
GND
GND
TANK
GND
GND
BYPASS
Figure 2. SA621 Block Diagram
SR01428
2
853-1849 018660
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