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TRF1015 Datasheet

  • TRF1015

  • RF DOWNCONVERTER

  • 21頁

  • TI

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TRF1015
RF DOWNCONVERTER
SLWS021D鈥?JUNE 1996 鈥?REVISED JULY 1998
D
D
D
D
D
D
D
Low-Noise Amplifier (LNA), Radio
Frequency (RF) Mixer, and
Voltage-Controlled Oscillator (VCO)
Improved Compression Mode
Conversion From RF to Intermediate
Frequency (IF) on a Single Chip
Suitable for Portable 900-MHz Cellular and
Cordless Telephones
Low-Current Consumption Mode
20-Pin Plastic Shrink Small Outline (SSOP)
Package
Application-Selectable Internal or External
Oscillator
DB PACKAGE
(TOP VIEW)
PD1
PD2
AUX_LO鈥?/div>
AUX_LO+
OSC2
VCO_GND
OSC1
VCO_V
CC
VCO_BYP
LNA_GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
MIX_OUT鈥?/div>
MIX_OUT+
MIX_IN
MIX_GND
LNA_GND
LNA_IN
LNA_V
CC
LNA_OUT
LNA_GND
LNA_GND
description
The Texas Instruments (TI鈩? TRF1015 is a single-chip RF downconverter suitable for 900-MHz receiver
applications. It combines a low-noise amplifier (LNA), a buffered voltage-controlled oscillator (VCO), and an RF
mixer into a 20-pin SSOP package requiring very few external components.
Minimal power consumption can be further reduced by placing the required modules into operate mode and the
remaining modules into standby mode.
Three modes of operation are provided for both the LNA and the mixer: standby, low current, and improved
compression. The improved compression mode is suitable for applications that require full duplex capability.
The improved compression mode is suitable for maintaining receiver sensitivity in the presence of large
interfering signals and provides a low bit-error rate (BER) in digital modulation systems. The three modes of
operation are selectable in accordance with the presence of a high or low signal on PD1 and PD2, as shown
in Table 1.
Table 1. Mode Control
MODE
Standby
Low current
Improved compression
PD1
L
H
L
PD2
L
H
H
The LNA has a gain of 13 dB and a noise figure of 2.2 dB. LNA input and output characteristic impedances are
50
鈩?
The single balanced RF mixer has a gain of 9 dB with a single-sideband (SSB) noise figure of 10 dB. The
VCO has a typical tuning range of 25 MHz using an external varactor and resonator. The VCO gain and tuning
range can be adjusted to meet the phase-locked loop (PLL) design requirement, with an external shunt and
feedback capacitors in series with the resonator. A buffered output of the VCO provides phase locking capability
and can be configured for single-ended or differential operation.
The TRF1015 is offered in the 20-pin SSOP (DB) package and is characterized for operation from 鈥?40擄C
to 85擄C free-air temperature.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TI is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
漏
1998, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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