PNX8510HW/B1,557 NXP Semiconductors, PNX8510HW/B1,557 Datasheet - Page 80
PNX8510HW/B1,557
Manufacturer Part Number
PNX8510HW/B1,557
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX8510HWB1557.pdf
(92 pages)
Specifications of PNX8510HW/B1,557
Lead Free Status / RoHS Status
Compliant
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Philips Semiconductors
10. Application information
9397 750 12612
Product data
10.1 Audio DAC
Table 43:
Table 44:
From the simplified schematic
depends upon:
This relationship is:
Vout(rms) = 12 ⋅ α/√2 ⋅ Rconv/Rref ⋅ Vref
Offset
0xB5
0xB
0xB3
Offset
0x01
0x02
•
•
•
Fig 32. Simplified schematic of audio DAC
the maximum digital input level at low frequencies (α)
the current mirror gain (ideally 12)
the ratio of the I/V conversion resistance (Rconv) and the reference resistance
(Rref)
α: max. dig. i/p level
v6.0: Rconv = 247Ω
Rref = 18000Ω
α: -5.67 dB = 0.521
=> vout(rms) = 0.607 vref
vout rms
(
PNX8510/11_VIDEO
PNX8510/11_AUDIO
)
=
V ref
12αRconv
-------------------------- - vref
Rev. 04 – 12 January 2004
1.41Rreg
R ref
V DDA
V SSA
1
…continued
Figure
:
V DDA
V SS
7
7
32, it can be seen that the output voltage swing
:
:
Value
0x0
0x0
Value
0x70
0x10
0x70
V DDA
12
12
p-dac
n-dac
V SS
L OUT
V ref
MDB660
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rconv
PNX8510/11
Analog companion chip
V OUT
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