Texas Instruments PCM2704, Руководство пользователя

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ELECTRICAL CHARACTERISTICS
PCM2704
,,
PCM2705
PCM2706, PCM2707
www.ti.com ....................................................................................................................................................... SLES081F – JUNE 2003 – REVISED JANUARY 2009
all specifications at T
A
= 25°C, V
BUS
= 5 V, f
S
= 44.1 kHz, f
IN
= 1 kHz,16-bit data (unless otherwise noted)
PCM2704DB, PCM2705DB,
PCM2706PJT, PCM2707PJT
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX
DIGITAL INPUT/OUTPUT
Host interface Apply USB revision 1.1, full-speed
Audio data format USB isochronous data format
INPUT LOGIC
V
IH
2 3.3
V
IL
–0.3 0.8
Input logic level Vdc
V
IH
(1)
2 5.5
V
IL
(1)
–0.3 0.8
I
IH
(2)
V
IN
= 3.3 V ±10
I
IL
(2)
V
IN
= 0 V ±10
Input logic current
µ
A
I
IH
V
IN
= 3.3 V 65 100
I
IL
V
IN
= 0 V ±10
OUTPUT LOGIC
V
OH
(3)
I
OH
= –2 mA 2.8
V
OL
(3)
I
OL
= 2 mA 0.3
Output logic level Vdc
V
OH
I
OH
= –2 mA 2.4
V
OL
I
OL
= 2 mA 0.4
CLOCK FREQUENCY
Input clock frequency, XTI 11.994 12 12.006 MHz
f
s
Sampling frequency 32, 44.1, 48 kHz
DAC CHARACTERISTICS
Resolution 16 Bits
Audio data channel 1, 2 Channel
DC ACCURACY
Gain mismatch, channel-to-channel ±2 ±8 % of FSR
Gain error ±2 ±8 % of FSR
Bipolar zero error ±3 ±6 % of FSR
DYNAMIC PERFORMANCE
(4)
R
L
> 10 k Ω , self-powered,
0.006% 0.01%
V
OUT
= 0 dB
Line
(5)
Total harmonic R
L
> 10 k Ω , bus-powered,
THD+N 0.012% 0.02%
dist noise V
OUT
= 0 dB
R
L
= 32 Ω , self-/
Headphone 0.025%
bus-powered, V
OUT
= 0 dB
THD+N Total harmonic dist noise V
OUT
= –60 dB 2%
Dynamic range EIAJ, A-weighted 90 98 dB
S/N Signal-to-noise ratio EIAJ, A-weighted 90 98 dB
Channel separation 60 70 dB
(1) HOST
(2) D+, D–, HOST, TEST, TEST0, TEST1, DT, PSEL, FSEL, XTI
(3) FUNC0, FUNC1, FUNC2
(4) f
IN
= 1 kHz, using the System Two™ Cascade audio measurement system by Audio Precision™ in the RMS mode with a 20-kHz LPF
and 400-Hz HPF.
(5) THD+N performance varies slightly, depending on the effective output load, including dummy load R7, R8 in Figure 32 .
Copyright © 2003–2009, Texas Instruments Incorporated
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Product Folder Link(s): PCM2704 PCM2705 PCM2706 PCM2707
PCM2704 and PCM2705
Not Recommended For New Designs