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BT869KRF

Flicker-Free Video Encoder with Ultrascale™ Technology

Conexant Systems 

1.0 Functional Description

1.1 Pin Descriptions

Bt868/Bt869

Flicker-Free Video Encoder with UltrascaleTM Technology

Table 1-1. Pin Assignments (3 of 3)

Pin Name I/O

Pin #

Description

FSADJUST

VBIAS

I 78

O 77

VREF

O 76

COMP

O 75

AGND_DAC

VAA_DACC

DACC

VAA_DACB

DACB

VAA_DACA

DACA

N/C

— 74

— 73

O 72

— 71

O 70

— 69

O 68

— 65, 66, 67

Full-scale adjust control pin. A resistor (RSET) connected between this pin

and GND controls the full-scale output current on the analog outputs.

DAC bias voltage. A 0.1 µF ceramic capacitor must be used to bypass this

pin to GND. The capacitor must be as close to the device as possible to keep

lead lengths to an absolute minimum.

Voltage reference pin. A 0.1 µF ceramic capacitor must be used to decouple

this pin to GND. The decoupling capacitor must be as close to the device as

possible to keep lead lengths to an absolute minimum.

Compensation pin. A 0.1 µF ceramic capacitor must be used to bypass this

pin to VAA. The capacitor must be as close to the device as possible to keep

lead lengths to an absolute minimum.

Common DAC Analog ground return. All AGND and VSS pins must be

connected together on the same PCB plane to prevent latchup.

DACC Analog power. All VAA and VDD pins must be connected together on

the same PCB plane to prevent latchup.

DACC output.

DACB Analog power. All VAA and VDD pins must be connected together on

the same PCB plane to prevent latchup.

DACB output.

DACA Analog power. All VAA and VDD pins must be connected together on

the same PCB plane to prevent latchup.

DACA output.

No connect pins

NOTE(S):

(1) Any unused inputs should not be left floating.

1-4

Conexant

100123B

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