Burr Brown Products
from Texas Instruments
PCM3793
PCM3794
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital
Speaker Amplifier
FEATURES
•
Analog Front End:
– Stereo Single-Ended Input With Multiplexer
– Mono Differential Input
– Stereo Programmable Gain Amplifier
– Microphone Boost Amplifier (20 dB) and
Bias
Analog BackEnd:
– Stereo/Mono Line Output With Volume
– Stereo/Mono Headphone Amplifier With
Volume and Capless Mode
– Stereo/Mono Digital Speaker Amplifier
(BTL) With Volume (PCM3793)
Analog Performance:
– Dynamic Range: 93 dB (DAC)
– Dynamic Range: 90 dB (ADC)
– 40-mW + 40-mW Headphone Output at
R
L
= 16
Ω
– 700-mW + 700-mW Speaker Output at
R
L
= 8
Ω
Power Supply Voltage
– 1.71 V to 3.6 V for Digital I/O Section
– 1.71 V to 3.6 V for Digital Core Section
– 2.4 V to 3.6 V for Analog Section
– 2.4 V to 3.6 V for Power Amplifier Section
Low Power Dissipation:
– 7 mW in Playback, 1.8 V/2.4 V, 48 kHz
– 13 mW in Record, 1.8 V/2.4 V, 48 kHz
– 30
µW
in Power Down
Sampling Frequency: 5 kHz to 50 kHz
Automatic Level Control for Recording
Operation From a Single Clock Input Without
PLL
System Clock:
– Common-Audio Clock (256 f
S
/384 f
S
), 12/24,
13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz
•
•
•
Headphone Plug Insert Detection
2 (I
2
C) or 3 (SPI) Wire Serial Control
Programmable Function by Register Control:
– Digital Attenuation of DAC: 0 dB to –62 dB
– Power Up/Down Control for Each Module
– 6-dB to –70-dB Gain for Analog Outputs
– 30-dB to –12-dB Gain for Analog Inputs
– 0/20 dB Boost Selectable for Microphone
Input
– 0-dB to –21-dB Gain for Analog Mixing
– Parameter Settings for ALC
– Three-Band Tone Control and 3D Sound
– High-Pass Filter and Two-Stage Notch Filter
– Analog Mixing
Pop-Noise Reduction Circuit
Short and Thermal Protection Circuit
Package: 5-mm
×
5-mm QFN Pacakge
Operation Temperature Range: –40°C to 85°C
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
Portable Audio Player, Cellular Phone
Video Camcorder, Digital Still Camera
PMP/DMB
DESCRIPTION
The PCM3793/94 is a low-power stereo CODEC
designed for portable digital audio applications. The
device integrates stereo digital speaker amplifier,
headphone amplifier, line amplifier, line input, boost
amplifier, microphone bias, programmable gain
control, analog mixing, sound effects, and automatic
level control (ALC). It is available in a small-footprint,
5-mm
×
5-mm QFN package. The PCM3793/94
accepts right-justified, left-justified, I
2
S, and DSP
formats, providing easy interfacing to audio DSP,
decoder, and encoder chips. Sampling rates up to 50
kHz are supported. The user-programmable
functions are accessible through a two- or three-wire
serial control port.
•
•
•
•
•
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated
PCM3793
PCM3794
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
CODE
RHB
RHB
OPERATION
TEMPERATURE
RANGE
–40°C to 85°C
–40°C to 85°C
PACKAGE
MARKING
PCM3793
PCM3794
ORDERING
NUMBER
(1)
PCM3793RHBT
PCM3793RHBR
PCM3794RHBT
PCM3794RHBR
TRANSPORT MEDIA
Small tape and reel
Large tape and reel
Small tape and reel
Large tape and reel
PCM3793RHB
PCM3794RHB
(1)
32 QFN
32 QFN
For the most current specification and package information, see the TI Web site at
www.ti.com.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
PCM3793/94
Supply voltage
Input voltage
Input current (any pins except supplies and SPK out)
Ambient temperature under bias
Storage temperature
Junction temperature
Lead temperature (soldering)
Package temperature (reflow, peak)
(1)
V
DD
, V
IO
, V
CC
, V
PA
–0.3 to 4
±0.1
–0.3 to 4
±10
–40 to 110
–55 to 150
150
260
260
Ground voltage differences: DGND, AGND, PGND
UNIT
V
V
V
mA
°C
°C
°C
°C,
5 s
°C
Stresses beyond those listed under
absolute maximum ratings
may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under
recommended operating
conditions
is not implied. Exposure to absolute–maximum–rated conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
V
CC
, V
PA
V
DD
, V
IO
Analog supply voltage
Digital supply voltage
Digital input logic family
Digital input clock frequency
SCKI system clock
LRCK sampling clock
LOL and LOR
Analog output load resistance
Analog output load capacitance
Digital output load capacitance
T
A
Operating free-air temperature
–40
HPOL and HPOR
SPOLP, SPOLN, SPORP and SPORN
3.072
8
10
16
8
30
10
85
2.4
1.71
NOM
3.3
3.3
CMOS
18.432
48
MHz
kHz
kΩ
Ω
Ω
pF
pF
°C
MAX
3.6
3.6
UNIT
V
V
2
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PCM3793
PCM3794
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
ELECTRICAL CHARACTERISTICS
All specifications at T
A
= 25°C, V
DD
= V
IO
= V
CC
= V
PA
= 3.3 V, f
S
= 48 kHz, system clock = 256 f
S
, and 16-bit data (unless
otherwise noted).
PARAMETER
Audio Data Characteristics
DATA FORMAT
Resolution
Audio data interface format
Audio data bit length
Audio data format
Sampling frequency (f
S
)
System clock
Digital Input/Output
Logic family
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
Input logic level
Input logic current
Output logic level
V
IN
= 3.3 V
V
IN
= 0 V
I
OH
= –2 mA
I
OL
= 2 mA
0.75 V
IO
0.25 V
IO
CMOS compatible
0.7 V
IO
0.3 V
IO
10
–10
VDC
VDC
µA
VDC
VDC
V
DD
< 2 V
V
DD
> 2 V
5
16
I
2
S, left-, right-justified, DSP
16
MSB first, 2s complement
50
27
40
kHz
MHz
Bits
Bits
TEST CONDITIONS
PCM3793RHB, PCM3794RHB
MIN
TYP
MAX
UNIT
Digital Input to Line Output Through DAC (LOL, LOR, and MONO)
R
L
= 10 kΩ, ALC = OFF, volume = 0 dB, speaker = powered down, analog mixing = disabled
DYNAMIC PERFORMANCE
Full-scale output voltage
Dynamic range
SNR
Signal-to-noise ratio
Channel separation
THD+N Total harmonic distortion + noise 0 dB
Load resistance
Line Input to Line Output Through Mixing Path (LOL, LOR, and MONO)
R
L
= 10 kΩ, ALC = OFF, volume = 0 dB, speaker = powered down, analog mixing = enabled
DYNAMIC PERFORMANCE
Full-scale input and output
voltage
SNR
Signal-to-noise ratio
0 dB
EIAJ, A-weighted
84
2.828
1
93
Vp-p
Vrms
dB
10
0 dB
EIAJ, A-weighted
EIAJ, A-weighted
86
2.828
1
93
93
91
0.008%
kΩ
Vp-p
Vrms
dB
dB
dB
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3
PCM3793
PCM3794
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A
= 25°C, V
DD
= V
IO
= V
CC
= V
PA
= 3.3 V, f
S
= 48 kHz, system clock = 256 f
S
, and 16-bit data (unless
otherwise noted).
PARAMETER
TEST CONDITIONS
PCM3793RHB, PCM3794RHB
MIN
TYP
MAX
UNIT
Digital Input to Headphone Output Through DAC (HPOL and HPOR)
R
L
= 16
Ω
or 32
Ω,
ALC = OFF, volume = 0 dB, speaker = powered down, analog mixing = disabled, not capless mode
DYNAMIC PERFORMANCE
Full-scale output voltage
SNR
Signal-to-noise ratio
0 dB
EIAJ, A-weighted
30 mW, R
L
= 32
Ω,
volume = 0 dB
40 mW, R
L
= 16
Ω,
volume = –1 dB
16
200 Hz, 140 mVp-p
PSRR
Power-supply rejection ratio
1 kHz, 140 mVp-p
20 kHz, 140 mVp-p
Line Input to Headphone Output Through Mixing Path (HPOL and HPOR)
R
L
= 16
Ω
or 32
Ω,
ALC = OFF, volume = 0 dB, speaker = powered down, analog mixing = enabled, not capless mode
DYNAMIC PERFORMANCE
Full-scale output voltage
SNR
Signal-to-noise ratio
Load resistance
R
L
= 8
Ω,
ALC = OFF, volume = 0 dB, headphone = powered down, analog mixing = disabled
DYNAMIC PERFORMANCE
Full-scale output voltage
SNR
Signal-to-noise ratio
Load resistance
200 Hz, 140 mVp-p
PSRR
Power-supply rejection ratio
1 kHz, 140 mVp-p
20 kHz, 140 mVp-p
Line Input to Speaker Output Through Mixing Path (SPOLP, SPOLN, SPORP, and SPORN): PCM3793
R
L
= 8Ω, ALC = OFF, volume = 0 dB, headphone = powered down, analog mixing = enabled
DYNAMIC PERFORMANCE
Full-scale output voltage
SNR
Signal-to-noise ratio
0 dB
EIAJ, A-Weighted
84
2.52
0.9
93
Vp-p
Vrms
dB
0 dB
EIAJ, A-weighted
84
8
–50
–45
–25
dB
2.52
0.9
93
0.3%
Ω
Vp-p
Vrms
dB
0 dB
EIAJ, A-weighted
84
16
2.828
1
93
Vp-p
Vrms
dB
Ω
–40
–45
–32
dB
84
2.828
1
93
0.1%
0.03%
Ω
Vp-p
Vrms
dB
THD+N Total harmonic distortion + noise
Load resistance
Digital Input to Speaker Output Through DAC (SPOLP, SPOLN, SPORP, and SPORN): PCM3793
THD+N Total harmonic distortion + noise 400 mW, R
L
= 8Ω, volume = 0 dB
4
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PCM3793
PCM3794
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A
= 25°C, V
DD
= V
IO
= V
CC
= V
PA
= 3.3 V, f
S
= 48 kHz, system clock = 256 f
S
, and 16-bit data (unless
otherwise noted).
PARAMETER
TEST CONDITIONS
PCM3793RHB, PCM3794RHB
MIN
TYP
MAX
UNIT
Line Input to Digital Output Through ADC (AIN1L/R, AIN2L/R, AIN3L, and AIN3L/R)
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
DYNAMIC PERFORMANCE
Full-scale input voltage
Dynamic range
SNR
Signal-to-noise ratio
Channel separation
THD+N Total harmonic distortion + noise –1 dB
ANALOG INPUT
Center voltage
Input impedance
Microphone Bias
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
Bias voltage
Bias source current
Output noise
Filter Characteristics
INTERPOLATION FILTER FOR DAC
Pass band
Stop band
Pass-band ripple
Stop-band attenuation
Group delay
De-emphasis error
ANALOG FILTER FOR DAC
Frequency response
DECIMATION FILTER FOR ADC
Pass band
Stop band
Pass-band ripple
Stop-band attenuation
Group delay
HIGH-PASS FILTER FOR ADC
–3 dB, f
c
= 4 Hz
–0.5 dB, f
c
= 4 Hz
Frequency response
–0.1 dB, f
c
= 4 Hz
–3 dB, f
c
= 240 Hz
–0.5 dB, f
c
= 240 Hz
–0.1 dB, f
c
= 240 Hz
3.74
10.66
24.2
235.68
609.95
2601.2
Hz
f < 3.268 f
S
–60
17/f
S
0.591 f
S
±0.02
dB
dB
s
0.408 f
S
f = 20 kHz
±0.2
dB
–50
19/f
s
±0.1
0.546 f
S
±0.04
dB
dB
s
dB
0.454 f
S
0.75 V
CC
2
14
V
mA
µV
10
0.5 V
CC
20
V
kΩ
0 dB
EIAJ, A-weighted
EIAJ, A-weighted
83
2.828
1
90
90
87
0.009%
Vp-p
Vrms
dB
dB
dB
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