SA1620 Datasheet, PDF (2/26 Pages) NXP Semiconductors – Low voltage GSM front-end transceiver

Philips Semiconductors
Low voltage GSM front-end transceiver
Product specification
SA1620
DESCRIPTION
The SA1620 is a combined receive (Rx) and transmit (Tx) front-end
for GSM cellular telephones. The receive path contains two low
noise amplifiers (LNA1 and LNA2) with four switchable attenuation
steps. A Gilbert Cell mixer in the receive path down-converts the
RF signal to a first IF of 70 to 500 MHz. A second Gilbert Cell in the
transmit path transposes a GMSK or phase modulated IF to RF by
image reject mixing and has a fixed IF of 400 MHz. A buffered LO
signal is fed to Rx and Tx mixers. Rx or Tx path or the entire circuit
may be powered-down.
FEATURES
• Excellent noise figure: <2dB for the LNAs at 950MHz
• LNAs matched to 50Ω with external matching components
• LNAs with gain control, 59dB dynamic range in four discrete steps
• LNA gain stability ±0.5dB within -40 to 85°C
• Feedthrough attenuation LNA1 to Rx mixer ≥ 35dB
• Tx power adjustable from -3 to +12dBm by external resistor
• Direct supply: 2.7V to 5.5V
• Battery supply voltage V_BATT = 3.3V to 7.5V or direct supply
• Two DC regulators programmable for 3.0V, 3.4V, 3.7V or 5.1V
• Low current consumption: 28mA for Rx or 59mA for Tx
• Fully compatible with SA1638 GSM IF Digital I/Q circuit
APPLICATIONS
• 900MHz front end for GSM hand-held units
• Portable radio, TDMA systems
PIN CONFIGURATION
LQFP Package
48 47 46 45 44 43 42 41 40 39 38 37
V_CCL2 1
IN2 2
GNDL2 3
GNDL2A 4
OUT2 5
B6
A7
INM 8
INMX 9
COMP2 ¹⁰
COMP1 11
V_CCBM ¹²
48–PIN LQFP
13 14 15 16 17 18 19 20 21 22 23 24
36 V_BATT
35 PON
34 GNDREG1
33 VREG1
32 VREGF2
31 VREG2
30 GNDREG2
29 CON1
28 LO INX
27 LO IN
26 CON2
25 GNDTx2
ORDERING INFORMATION
DESCRIPTION
48-Pin Thin Quad Flat Pack (TQFP)
Figure 1. Pin Configuration
SR00127
TEMPERATURE RANGE
-40 to +85°C
ORDER CODE
SA1620BE
DWG #
SOT313-2
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
V_CCXX
V_BATT
T_A
Supply voltages
Battery voltage
Operating ambient temperature range
RATING
2.7 to 5.5
3.3 to 7.5
-40 to +85
UNITS
V
V
°C
1997 May 22
2
853-1784 18066