Quadrature Modulator

CMX993/CMX993W

 2013 CML Microsystems Plc

23

D/993/10

AC Parameters

Notes

Min.

Typ.

Max.

Units

Quadrature Modulator

DC Bias Input

14

-

1.6

-

V

I/Q Input Common Mode Voltage

1.3

1.55

1.7

V

I/Q Mixer Input Voltage

10

-

0.5

-

Vp-p

Modulator Minimum Input Bandwidth

-

50

-

MHz

Voltage Gain

24, 32

-

-2

-

dB

Transmit Gain Control Range

-

30

-

dB

Transmit Gain Control Step Size

-

2.5

-

dB

Gain Switching Time

25

-

-

10

µs

Transmit Output Power (PEP)

5,6, 20,

32

-

+3

-

dBm

Noise Floor

25, 29

-

-155

-

dBm/Hz

Wideband Noise During Modulation

7, 8, 30

-

-148

-145

dBc/Hz

Output Noise with Attenuation Steps

9, 12, 20

Attenuation = 5dB

Attenuation = 10dB

Attenuation = 15dB

Attenuation = 20dB

Attenuation = 25dB

-

-

-

-

-

-

-

-

-

-

-153

-155

-156

-158

-159

dBm/Hz

dBm/Hz

dBm/Hz

dBm/Hz

dBm/Hz

Image Suppression

-

At 30MHz

-

32

-

dB

At 100MHz

-

40

-

dB

At 500MHz

TBD

40

-

dB

At 1GHz

TBD

32

-

dB

Carrier Suppression

23

-35

-40

-

dBm

Intermodulation

11

30

-

-

dB

Equivalent Output IP3

-

25

-

dBm

IS-95 Performance

26

1

f=885kHz)

-

-72

-

dB

2

f=1.98MHz)

-

-84

-

dB

3

f=2.65MHz)

-

-67

-

dB

1dB Compression Point

29

-

+8

-

dBm

Load Impedance (Differential)

21

-

100

-



Discrete Unwanted Emissions (other

than harmonics of the output) in the

Frequency Range 9kHz

–12.75 GHz.

22

-

-

-80

dBc

Notes:

4.

Local oscillator input frequency twice or four times the required operating frequency.

5.

Output power reduced dB for dB with forward path attenuation.

6.

Peak power: PEP measured with 2-tone signal (two equal amplitude tones).

7.

Measured between noise floor and mean power in a two-tone modulated wanted signal.

8.

Measured at 400MHz, 5MHz offset over specified Forward Path Output Power range and with

forward path attenuation between 0dB and

–5dB. NB: typical noise performance achieved at

typical output power and above.

9.

Measured at 400MHz, 5MHz offset with specified Forward Path Output Power for relevant

attenuation level.