The PCM1772 and PCM1773 devices are CMOS, monolithic, integrated circuits which include stereo digital-to-analog converters, lineout circuitry, and support circuitry in small TSSOP-16 and VQFN-20 packages

PCM1772

Manufacturer Part NumberPCM1772
DescriptionThe PCM1772 and PCM1773 devices are CMOS, monolithic, integrated circuits which include stereo digital-to-analog converters, lineout circuitry, and support circuitry in small TSSOP-16 and VQFN-20 packages
ManufacturerTexas Instruments
PCM1772 datasheet
 


Specifications of PCM1772

# Dacs2# Inputs / # Outputs0 / 2
ArchitectureMultilevel Delta-SigmaResolution(bits)24
Sampling Rate(max)(khz)48Control InterfaceSPI
Digital Audio InterfaceL,R,I2SThd+n(typ)(%)0.007
Dac Snr(typ)(db)98Power Consumption(typ)(mw)6.5
Operating Temperature Range(c)0 to 70Analog Voltage Av/dd(min)(v)1.6
Analog Voltage Av/dd(max)(v)3.6Pin/package16TSSOP, 20VQFN
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PCM1772, PCM1773
SLES010G – SEPTEMBER 2001 – REVISED MARCH 2007
Connection Diagrams
Figure 29
shows the basic connection diagram with the necessary power supply bypassing and decoupling
components. It is recommended that the component values shown in
The use of series resistors (22
series resistor combines with the stray PCB and device input capacitance to form a low-pass filter that reduces
high-frequency noise emissions and helps to dampen glitches and ringing present on the clock and data lines.
Power Supplies and Grounding
The PCM1772 and PCM1773 devices require a 2.4-V typical analog supply for V
supplies power the DAC, analog output filter, and other circuits. For best performance, these 2.4-V supplies
must be derived from the analog supply using a linear regulator, as shown in
Figure 29
shows the proper power supply bypassing. The 10- F capacitors must be tantalum or aluminum
electrolytic, while the 0.1- F capacitors are ceramic (X7R type is recommended for surface-mount applications).
Audio DSP
Controller
10 F
28
APPLICATION INFORMATION
to 100
) is recommended for the SCKI, LRCK, BCK, and DATA inputs. The
1
LRCK
SCKI
16
2
DATA
MS
15
BCK
MC
3
14
PD
MD
4
13
PCM1772
AGND1
V
5
12
CC1
AGND2
V
6
11
CC2
V
AIN
7
10
COM
V
R
V
L
8
9
OUT
OUT
Figure 29. Basic Connection Diagram
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Figure 29
be used for all designs.
and V
. These 2.4-V
CC1
CC2
Figure
29.
1.6 V to 3.6 V
0.1 F
10 F
0.1 F
10 F
Analog In
10 F
Power Amplifier
Post
or Headphone
LPF
Amplifier
10 F
Power Amplifier
Post
or Headphone
LPF
10 F
Amplifier
S0007-01