LC78836M View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

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LC78836M

Digital Audio 16-Bit D/A Converter with On-Chip Digital Filters

SANYO -> Panasonic 

LC78836M

• Level shifting D/A converter

This 4-bit D/A converter is implemented by connecting the variable resistors VRH and VRL in series at the ends of

the resistor-string D/A converter resistors. The values of the VRH and VRL variable resistors are modified

according to the value of the low-order 4 bits of the data (D3 to D0) as follows:

— The value of VRH + VRL is held fixed regardless of the value of the data.

— The values of VRH and VRL are changed in R/256 unit steps (where R is the value of the resistor-string D/A

converter unit resistors) over the range zero to 15·R/256.

This causes the resistor-string D/A converter V1 and V2 outputs to change in ∆V/256 steps (where ∆V =

(VH –VL)/256) over the range 0 to 63 × ∆V/256 according to the value of the lower 4 bits of the data.

• VrefH/L and REFH/L pins

The VrefH/L pins, which provide a reference voltage to the resistor string, are normally set to VrefH = AVDD and

VrefL = AGND. Note that capacitors (about 10 µF) should be connected between REFH and AGND and between

REFL and AGND.

When VrefH is 5.0 V and VrefL is 0 V, the LC78836M outputs its maximum output amplitude as the range 0.5 V

(minimum) to 3.5 V (maximum) (3.0 Vp-p) for 0 dB playback according to the built-in RH and RL resistors.

Filter Characteristics (logical values)

Standard speed: 8× oversampling

Double speed: 4× oversampling

Ripple: Less than ±0.1 dB

Attenuation: –40 dB or lower

Standard speed (de-emphasis off)

Double speed (de-emphasis off)

(fs*=2 × fs)

No. 5127-9/12

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