GDC21D003 Ver la hoja de datos (PDF) - Hyundai Micro Electronics

Número de pieza

componentes Descripción

Fabricante

GDC21D003

VSB Receiver

Hyundai Micro Electronics 

4.2 Pin Description

Clock/Reset ; 6 Pins

PIN

NAME

38

NRESET

12

VCXO

14

ADCCLK

18

CLKFS

37

CLK4FS

41

SYMCLK

A/D Converters ; 7 Pins

PIN

NAME

2

REF

121

COM

123

REFN

124

REFP

125

INN

126

INP

128

BIAS

GDC21D003

TYPE

I

I

O

O

I/O

I

DESCRIPTION

System reset(active low); This signal should be

activated on channel change or power on.

Clock input generated in VCXO; This pin can be

connected to one of two VCXOs whose output

frequencies are fs(10.76MHz) and 2fs(21.52MHz).

Clock for Off-chip ADC(21.52MHz or 10.76MHz);

This clock is generated by dividing VCXO input signal.

System clock; This clock is generated from dividing

VCXO input signal. Its frequency is the same of symbol

rate(10.76MHz).

Test clock/4x symbol clock;

When PLLEN(pin35) input is set to ‘1’, this pin is used

as 4x symbol clock output.

When PLLEN(pin35) input is set to ‘0’, this pin is used

as test clock(43.04MHz) input.

System clock input(10.76MHz)

TYPE

I

I

I

I

I

I

I

DESCRIPTION

Bias register for internal ADC; This pin should be

connected to AVDD(3.3V) via 12k ohm register.

Common voltage(1.5V)

Reference voltage(bottom: 1.2V)

Reference voltage(top: 2.2V)

Analog data input(negative)

Analog data input(positive)

1.65 ± 0.5V

differential

Bias input(2V typical) for On-chip ADC; This pin

should be connected to AVSS via 0.1µF capacitor.

12

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