SA2420 Datasheet, PDF (2/16 Pages) NXP Semiconductors – Low voltage RF transceiver . 2.45GHz

Philips Semiconductors
Low voltage RF transceiver — 2.45 GHz
Product specification
SA2420
DESCRIPTION
The SA2420 transceiver is a combined low-noise amplifier, receive
mixer, transmit mixer and LO buffer IC designed for
high-performance low-power communication systems for
2.4-2.5GHz applications. The LNA has a 2.5dB noise figure at
2.45GHz with 14dB gain and an IP3 intercept of -3dBm at the input.
The gain is stabilized by on-chip compensation to vary less than
±0.2dB over the -40 to +85°C temperature range. The
wide-dynamic-range receive mixer has a 10.9dB noise figure and an
input IP3 of +2.8dBm at 2.45GHz. The nominal current drawn from
a single 3V supply is 37mA in transmit mode and 22mA in receive
mode.
FEATURES
• Low current consumption: 37mA nominal transmit mode and
22mA nominal receive mode
• Fabricated on a high volume, rugged BiCMOS technology
• High system power gain: 22.5dB (LNA + Mixer) at 2.45GHz
• TSSOP24 package
• Excellent gain stability versus temperature and supply voltage
• -10dBm LO input power can be used to drive the mixer
• Operates with either full or half frequency LO
• Wide IF range: 50–500MHz
PIN CONFIGURATION
DH Package
GND 1
LNA IN 2
24 V_CC
23 LNA OUT
GND 3
22 GND
GND 4
21 ATTEN SW
Rx IF OUT 5
20 GND
Rx IF OUT 6
Tx IF IN 7
Tx IF IN 8
19 RF IN/OUT
18 GND
17 Tx/Rx SW
GND 9
16 GND
LOP 10
LO SW 11
LOM 12
15 GND
14 V_CC LO
13 CHIP EN
SR00164
Figure 1. Pin Configuration
APPLICATIONS
• 2.45GHz WLAN front-end (802.11, ISM)
ORDERING INFORMATION
DESCRIPTION
24-Pin Plastic Thin Shrink Small Outline Package (Surface-mount, TSSOP)
TEMPERATURE RANGE
-40 to +85°C
ORDER CODE
SA2420DH
DWG #
SOT355-1
BLOCK DIAGRAM
LNA
V_CC
OUT
24
23
GND
22
ATTEN
SW
21
GND
20
RF IN/
OUT
19
GND
18
TX
Tx/Rx
SW
17
GND
16
PRE-DRIVER
V_CC
GND
LO
15
14
CHIP
EN
13
1
GND
ATTENUATOR
LNA
RX
BPF
2
3
4
RX
5
6
TX
7
8
BUFFER
X1
9
10
BPF
FREQ.
DBLER X2
11
12
LNA
IN
GND
GND
Rx IF
OUT
Rx IF
OUT
Tx IF
IN
Tx IF
IN
GND
Figure 2. SA2420 Block Diagram
LOP
LO
SW
LOM
SR00165
1997 May 23
2
853–1984 18069