MB40168 Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Fabricante

MB40168

Single Chip 8-Bit A/D and 9-Bit D/A Converter

Fujitsu 

MB40168/MB40178

s EQUIVALENT CIRCUITS OF ADC BLOCK

• Analog Input Equivalent Circuit

VCCA

VINA

VCCA

VINA

CINA

A.GND

A.GND

x 255 circuits

CINA: Junction Capacitance of non-linear emitter follower

RINA: Linear resistance model of input current by the comparator switching

VINA < VRB: ∞

CLK = “H”: ∞

VRB: This is the voltage on VRB Pin, not VRB Pin itself.

IBIAS: Constant input bias current

VD: Base-Collector junction diode of emitter follower transistor

• Clamp Input Equivalent Circuit

VD

IBIAS

RINA

A.GND

VRB

VCCA

2.0mA

0.6 x VCC + 50mV +VBE

VINC

A.GND

850kΩ

VOUTC

-+

CCLMP

VCLMP

12

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