DA9116.005
22 November, 2005
Serial Interface Timing
TWHC
TRC
TWLC
TFC
1
2
3
4
5
6
7
8
9
10 11
13 14 15 16
12
CCLK
THCSH
TSSHCH
THLCHS
TSSLCH
XCS
THCHD
TSDCH
DATA
(IN)
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
TDCLD
TDSZ
DATA
(OUT)
4
3
7
6
5
2
1
0
DATA BYTE
ADDRESS BYTE
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.
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.
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
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
to the output. To 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
Analog Devices
Analog Devices
Texas Instruments (BurrBrown)
Linear
On-Semi, ST Microelectronics
OP275
8.5
OP1177
AD8610
OP277
LT1793
MC33078
0.51
1.49
0.23
18.5
28.4
11 (18)
MAS [ MICRO ANALOG SYSTEMS ]
