MAS9116AASD08 datasheet(11/18 Pages) MAS

11 / 18 page

11 (18)

DA9116.005

22 November, 2005

Serial Interface Timing

APPLICATION INFORMATION

Power supply connection and decoupling

To get the best performance of the chip all digital

activities should be avoided during analog signal

processing.

Important: Analog (AVDD) and digital (DVDD)

supply voltage pins should be always connected

directly together to keep them in the same voltage

potential. No resistor is allowed in connection

between AVDD and DVDD (see supply voltage

connection circuit in the Application Note 1 on the

next page). Otherwise possible voltage difference

could trigger latch-up phenomenom which can

damage the device. Due to the same reason also

the digital control input voltages should not exceed

supply and ground voltages as specified in absolute

maximum rating specifications on page 6. These

requirements are valid also during the startup when

supply voltages are applied.

Low noise supply voltages should be used for high

quality audio. Supply decoupling capacitors must be

located as close to MAS9116 as possible.

Opamp produced output offset voltage

Opamp non-idealities in input offset voltage and in

input bias current both produce offset voltage to the

output. Since this offset voltage is gain dependent

the gain change step can produce dc voltage steps

the

output.

achieve

the

best

audio

performance it is recommended to use opamps

which have both low input offset voltage and low

input

bias

current

characteristics.

Burr-Brown

OP277 has excellent offset and bias and no

trimming is needed. Also Analog Devices OP1177

and AD8610 offer very good offset performance.

See table below for these and other recommended

op-amps.

Manufacturer

Part Number

Typical Output Offset at

Maximum Gain (mV)

Analog Devices

OP275

8.5

Analog Devices

OP1177

0.51

Analog Devices

AD8610

1.49

Texas Instruments (BurrBrown)

OP277

0.23

Linear

LT1793

18.5

On-Semi, ST Microelectronics

MC33078

28.4

TWHC TWLC

TRC

TFC

TSSLCH

THCSH

TSDCH

THCHD

TDCLD

TDSZ

THLCHS

TSSHCH

CCLK

DATA

(IN)

DATA

(OUT)

XCS

ADDRESS BYTE

DATA BYTE

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