TRF1500

DUAL-BAND/DUAL-MODE PCS RECEIVER

SLWS041A – JANUARY 1998

1

POST OFFICE BOX 655303

Rejection Configuration for High Band

3.6 V to 4 V

Cellular Telephones (IS136)

(TQFP)

description

The TRF1500 is a dual-band/dual-mode personal communications system (PCS) receiver for cellular

telephones operating dual mode (analog and digital) in the 800-MHz band and single mode (digital) in the

1900-MHz band. The TRF1500 consists of a low-noise amplifier (LNA) and mixer for each band. The high band

uses an image rejection mixer for down conversion while the low band relies on an off-chip image rejection filter

between the LNA and mixer.

The local oscillator (LO) inputs additionally have buffered outputs that can be used in either single-ended or

differential mode for a phase-locked-loop (PLL) configuration. A state is also available that allows the low-band

LO to serve as the high-band LO through a mode-selectable frequency doubler.

A wideband mixer is also available for transmit loop architectures commonly used in advanced mobile phone

systems, global systems for mobile communications, and digital cellular systems.

Power consumption is low and can be further reduced by operating the TRF1500 in sleep mode. Typical power

consumption for each receiver function is shown in Table 1.

The TRF1500 is available in a 48-pin plastic thin-quad flatpack package (TQFP) and is characterized for

operation from –30

FUNCTION

TYPICAL POWER

UNIT

Sleep mode

38

µW

Low band

85

mW

High band

190

mW

Transmit mixer

50

mW

Frequency doubler

12

mW

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.

Copyright

© 1997, 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.

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.