FX980 datasheet(77/86 Pages) CMLMICRO

77 / 86 page

TETRA Baseband Processor

FX980

D/980/3

Receive Parameters

Parameter

Typ

Units

Conditions/Comments

Input impedance

Differential Input voltage range

VCC=5.0V

VCC=3.3V

3rd order intercept

With internal anti-alias filter

disabled:-

Anti -alias requirements

@ 130kHz

@ 2.3MHz

ADC sampling rate

ADC resolution

Integral accuracy

Differential accuracy

RRC Roll-off coefficient (a)

|H(f)| 0 - 5.85kHz

|H(f)| @ 9kHz

|H(f)| @ 10.05kHz

|H(f)| @ 12.15kHz

|H(f)| @ 16kHz

|H(f)| @ 25kHz

|H(f)| @ 50kHz

|H(f)| @ 75kHz

FIR filter sampling rate

Output rate (16 bit words per

channel) - selectable

Offset

Gain matching, I to Q

Phase matching, I to Q

Storage time

Active Power

With internal anti-alias filter enabled:-

Anti -alias requirements

@ 130kHz

@ 2.3MHz

Active Power

<10

> 100

2.8

1.8

TBD

<-30

<-120

2.304

< ±1

0.35

± 0.2

-3 ± 0.2

-6 ± 1

< -30

< -70

< -80

< -90

2.304

144

or 72

< 10

< ± 0.1

< ±0.5

< 15

<100

<-30

<110

Ω

V pk-pk

(Typ)

MHz

Bits

LSB

MHz

kHz

Degrees

Symbols

Capacitive load to VSS1 or VSS2

Source should be < 1000

Ω

Note this means ±0.7V or

±0.45V on each input of the

differential pair.

w.r.t. max. input level

0 dB corresponds to 1V pk-pk

Decimation sections

RRC sections

Output via the serial interface at

4.608 MHz or 2.304MHz

Without adjustment

Without adjustment, 0 -10kHz

0 - 10kHz

3.3V power supply

Use network shown in Figure 2

w.r.t. max. input level

FX980 Datasheet(PDF) 77 Page - CML Microcircuits

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