UDA1338H/N1,518 NXP Semiconductors, UDA1338H/N1,518 Datasheet - Page 9

• Manufacturer Part Number: UDA1338H/N1,518
• Description: IC AUDIO CODER/DECODER 44QFP
• Manufacturer: NXP Semiconductors
• Type: Stereo Audior

Specifications of UDA1338H/N1,518

• Package / Case: 44-MQFP, 44-PQFP
• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 5 / 6
• Sigma Delta: No
• S/n Ratio, Adcs / Dacs (db) Typ: 100 / 114
• Voltage - Supply, Analog: 2.7 V ~ 3.6 V
• Voltage - Supply, Digital: 2.7 V ~ 3.6 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Product: General Purpose Audio Amplifiers
• Available Set Gain: 26 dB
• Operating Supply Voltage: 3.3 V
• Supply Current: 30 mA, 20 mA, 31 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 22 KOhms
• Input Signal Type: Single
• Minimum Operating Temperature: - 20 C
• Output Signal Type: Differential
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Output Type: Differential
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935268945518; UDA1338HB-T; UDA1338HB-T

NXP Semiconductors
UDA1338H
Product data sheet
8.5 Decimation filter of voice ADC
8.6 Interpolation filter of DAC
8.7 Noise shaper of DAC
8.8 Digital mixer
The voice ADC decimation filter is realized with the combination of a Finite Impulse
Response (FIR) filter and Infinite Impulse Response (IIR) filter for shorter group delay.
The filter characteristics are shown in
of the ADC is hard muted for a certain period. This hard-mute time can be chosen
between 1024 and 2048 samples.
Table 8:
The digital interpolation filter interpolates from 1f
sampling mode) by cascading FIR filters, and has two sets of filter coefficients for sharp
and slow roll-off as given in
Table 9:
Table 10:
The 3rd-order noise shaper operates at either 128f
mode), and converts the 24-bit input signal into a 5-bit signal stream. The noise shaper
shifts 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 UDA1338H has 6 digital mixers inside the interpolator; see
signals can be mixed with the I
selected by the bits MIX[1:0].
Item
Pass-band ripple
Pass-band droop
Stop band
Dynamic range
Item
Pass-band ripple
Stop band
Dynamic range
Item
Pass-band ripple
Pass-band droop
Stop band
Dynamic range
Decimation filter characteristics (voice ADC)
Interpolation filter characteristics (sharp roll-off)
Interpolation filter characteristics (slow roll-off)
All information provided in this document is subject to legal disclaimers.
Rev. 04 — 18 May 2010
Table 9
0 to 0.45f
0 to 0.45f
0 to 0.22f
Condition
0.45f
>0.55f
0 to 0.45f
Condition
> 0.55f
0 to 0.45f
Condition
0.45f
> 0.78f
0 to 0.22f
2
S-bus input signals. The mixing of the ADC signals can be
s
s
and
s
s
s
Table
s
s
s
s
s
s
Table
8. During the power-on sequence, the output
10.
s
to 128f
s
or 64f
Multichannel audio coder-decoder
s
s
(or to 64f
(in the 192 kHz sampling
Value (dB)
±0.05
−0.2
−65
>110
Value (dB)
±0.002
−75
> 135
Value (dB)
±0.002
−3.1
−94
> 135
Figure
UDA1338H
s
in the 192 kHz
4. The ADC
© NXP B.V. 2010. All rights reserved.
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