UDA1343TT NXP Semiconductors, UDA1343TT Datasheet - Page 10

• Manufacturer Part Number: UDA1343TT
• Manufacturer: NXP Semiconductors

Specifications of UDA1343TT

• Single Supply Voltage (typ): 3V
• Single Supply Voltage (min): 2.4V
• Single Supply Voltage (max): 3.6V
• Package Type: TSSOP
• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
Digital output signal
The output to the digital output of the UDA1343TT can be
selected from 3 positions, using the two bits ADC_OUT
select in the L3 microcontroller interface. The 3 positions
are as follows:
Noise shaper (DAC)
The 3rd-order noise shaper operates at 128f
in-band quantization noise to frequencies well above the
audio band. This noise shaping technique enables high
signal-to-noise ratios to be achieved. The noise shaper
output is converted into an analog signal using a Filter
Stream Digital-to-Analog Converter (FSDAC).
The Filter Stream DAC (FSDAC)
The FSDAC is a semi-digital reconstruction filter that
converts the 1-bit data stream of the noise shaper to an
analog output voltage. The filter coefficients are
implemented as current sources and are summed at
virtual ground of the output operational amplifier.
2001 Jul 25
Directly from the ADC and decimator (default)
After volume control and mute in the ADC data path
After the digital mixer and before master volume control
and mute. It should be noted that this output is before
the +6 dB gain. This is done in order to prevent clipping
at the mixer output at all times.
Economy audio CODEC with features
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In this way very high signal-to-noise performance and low
clock jitter sensitivity is achieved. A post-filter is not
needed due to the inherent filter function of the DAC.
On-board amplifiers convert the FSDAC output current to
an output voltage signal capable of driving a line output.
The output voltage of the FSDAC scales proportionally
with the power supply voltage.
Multiple format input/output audio interface
The digital audio interface supports multiple standards:
The digital audio interface formats are illustrated in Fig.5.
I
MSB-justified serial format with data word length of up to
24 bits
LSB-justified data formats with word lengths of 16, 18,
20 and 24 bits
Four combined data formats with MSB data output
and 16, 18, 20 and 24 LSB data input.
2
S-bus with data word length of up to 24 bits
UDA1343TT
Product specification