RF2938 Просмотр технического описания (PDF) - RF Micro Devices

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RF2938

2.4GHZ SPREAD-SPECTRUM TRANSCEIVER

RF Micro Devices 

RF2938

Parameter

Data Amplifiers

Bandwidth

Gain (Limiting mode)

Rise and Fall Time

Logic High Output

Logic Low Output

Hysteresis

Transmit Modulator and

LPF

Filter Gain

Baseband Filter 3dB Bandwidth

Passband Ripple

Group Delay

Specification

Min.

Typ.

Max.

40

60

2

5

VCC - 0.3 V

VCC

0.3

30

0

1

35

0.1

15

Group Delay

Ultimate Rejection

Input Impedance

Input AC Voltage

Input DC Offset Requirement

IF Frequency Range

Output Impedance

I/Q Phase Balance

I/Q Gain Balance

Conversion Voltage Gain

400

> 80

3

200

1.6

1.7

1.8

45

500

2

±2

±5

0.5 ± 0.25

1.0

1.1

Output P1dB

-6

Carrier Output

-30

Harmonic Outputs

Transmit VGA and

Upconverter

VGA Gain Range

VGA Input Voltage Range

VGA Gain Sensitivity

VGA Input Impedance

RF Mixer Output Impedance

VGA/Mixer Conversion Gain

VGA/Mixer Output Power

-30

17

1.0 to 2.0

17

230-j400

75 - j350

50

+10 to +27

-9

VGA/Mixer Output Power

-4

Unit

Condition

MHz

dB

ns

V

V

mV

Open Loop.

5pF load.

Source Current 1mA

Sink Current 1mA.

dB

MHz

dB

ns

ns

dB

kΩ

mVp-p

V

MHz

kΩ

dB

V/V

dBm

dBm

dBc

Any setting

5th order Bessel LPF, Set by BW CTRL

At 35MHz, increasing as bandwidth

decreases.

At 2MHz.

Single ended

Linear, Single ended.

For correct operation.

Open Collector when TX on, hi-Z when off

With Current Combination into 50Ω single-

ended load

With Current Combination into 50Ω single-

ended load

Without external offset adjustments.

280 MHz

dB

V

dB/V

Ω

Ω

Ω

dB

dBm

dBm

Positive Slope

280 MHz

374 MHz

With matching elements.

With 50Ω match on the output.

1dB compression - Single Side Band,

TX GC=1.0V

1dB compression - Single Side Band,

TX GC=2.0V

11

Rev A8 010418

2-3

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