SA2421 datasheet(5/12 Pages) PHILIPS

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Philips Semiconductors

Product specification

SA2421

2.45 GHz low voltage RF transceiver

2000 Mar 13

AC ELECTRICAL CHARACTERISTICS (continued)

SYMBOL

PARAMETER

TEST CONDITIONS

LIMITS

UNITS

SYMBOL

PARAMETER

TEST CONDITIONS

MIN

–3

TYP

MAX

UNITS

Tx Mixer (Tx OUT = Pin 17, IF = Pins 7 and 8, LO = Pin 10 or 12, PLO = –10 dBm)

PGC

Power conversion gain: RL = 50 Ω

RS = 50 Ω

fS = 2.45 GHz,

fLO = 2.1 GHz,

fIF = 350 MHz

22.5

23.5

S11–RF

Output match at RF (2.45 GHz)1

–10

NFM

SSB noise figure (2.45 GHz) (50

Ω)

10.9

11.2

11.5

P-1dB

Output 1dB gain compression

4.2

dBm

IP3

Output third order intercept

f1 – f2 = 1 MHz

10.1

12.2

14.3

dBm

Tx Mixer Spurious Components (POUT = P–1dB)

PIF-RF

IF feedthrough to RF4

–50

dBc

PLO-RF

LO feedthrough to RF5

–22

dBc

PIMAGE-RF

Image feedthrough to RF6

–20

dBc

LO Buffer

PLO IN

LO drive level

–15

–10

–5

dBm

S11-LO

Mixer input match (LO = 2.1 GHz)

–10

fLOG

LOG frequency range3

1.9

2.1

2.3

GHz

Switching2

tRx-Tx

Receive-to-transmit switching time

µs

tTx-Rx

Transmit-to-Receive switching time

µs

tPOWER UP

Chip enable time

µs

tPWR DWN

Chip disable time

µs

NOTES:

1. With simple external matching

2. With 50 pF coupling capacitors on all RF and IF parts

3. This part has been optimized for the stated frequency range. Operation outside this frequency range may yield performance other than

specified in this datasheet.

4. Measured 5dB lower than 1dB compression point, with typical output matching network.

5. Measured at 1dB compression point.

6. With typical output matching network (no image reject mixer is used).

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