TRF2443IPFPR datasheet(9/72 Pages) TI

9 / 72 page

TRF2443

www.ti.com ................................................................................................................................... SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009

RECEIVER CHARACTERISTICS (continued)

VCC_3V = 3.3 V ±5%, TJ = 65°C , IF SAW filter insertion loss = 10 dB (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

FROM IF_IN TO RX_BBI (OR RX_BBQ)

Gmax

Maximum voltage gain

RXAGC = 2 V, RXBB_GAIN = 9

ΔGdig

Digital gain range

Programmed by SPI

ΔGstep

Digital gain step

ΔGanalog

Analog gain range

RXAGC = 2 V, RXBB_GAIN = 9

12.5

Noise figure

RXAGC = 0 V, RXBB_GAIN = 9

Image rejection

See RX Image Rejection section

-40

Output common mode

1.5

Parallel capacitor

Baseband output load

Parallel resistor

Ω

BASEBAND LOW-PASS FILTER

fC_ON

3-dB cutoff frequency

Filter on, programmed via SPI

MHz

ATT30M

Filter rejection at 30 MHz

Filter bypassed

3-dB point with fC = 2.3 MHz

(16)

2.2

MHz

3-dB corner-frequency step(17)

kHz

Rejection at 4.5 MHz with fC = 2.3 MHz

(16)

Rejection at 8.75 MHz with fC = 2.3 MHz

(16)

Filter rejection

Rejection at 17.5 MHz with fC = 2.3 MHz

(16)

3-dB point with fC = 8.5 MHz

(16)

8.3

MHz

Rejection at 18 MHz with fC = 8.5 MHz

(16)

Rejection at 35 MHz with fC = 8.5 MHz

(16)

Rejection at 70 MHz with fC = 8.5 MHz

(16)

(16) After room-temperature cutoff-frequency calibration

(17) Baseband filter 3-dB corner frequency control step via SPI around fC = 2.3 MHz

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