sa621dh NXP Semiconductors, sa621dh Datasheet - Page 2

• Manufacturer Part Number: sa621dh
• Description: 1ghz - Low Voltage Lna, Mixer And Vco
• Manufacturer: NXP Semiconductors

Philips Semiconductors
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 20 A.
FEATURES
ORDERING INFORMATION
BLOCK DIAGRAM
1997 Nov 07
20-Pin Thin Shrink Small Outline Package (Surface-mount, TSSOP)
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
1GHz low voltage LNA, mixer and VCO
10pF
MIXER
PD1
OUT
20
1
DESCRIPTION
10pF
MIXER
PD2
OUT
19
2
GND
GND
18
3
Figure 2. SA621 Block Diagram
MIXER
OUT
17
LO
4
IN
GND
GND
16
5
2
PIN CONFIGURATION
APPLICATIONS
LNA
GND
15
IN
6
900MHz cellular and cordless front-end
Spread spectrum receivers
RF data links
UHF frequency conversion
Portable radio
TEMPERATURE RANGE
TANK
LNA
GND
14
7
-40 to +85 C
BYPASS
LO OUT
Figure 1. Pin Configuration
OUT
GND
LNA
13
TANK
8
GND
GND
GND
GND
GND
PD1
PD2
10
1
2
3
4
5
6
7
8
9
GND
V
12
9
CC
ORDER CODE
BYPASS
11
10
GND
SA621DH
20
19
18
17
16
15
14
13
12
11
MIXER OUT
MIXER OUT
GND
MIXER IN
GND
LNA IN
GND
LNA OUT
V
GND
CC
Product specification
853-1849 018660
SA621
SOT360-1
DWG #
SR01428
SR01429