49%
FPO
PCM1801
®
FEATURES
q
DUAL 16-BIT MONOLITHIC
∆Σ
ADC
q
SINGLE-ENDED VOLTAGE INPUT
q
64X OVERSAMPLING DECIMATION FILTER:
Passband Ripple:
±
0.05dB
Stopband Attenuation: –65dB
q
ANALOG PERFORMANCE:
THD+N: –88dB (typ)
SNR: 93dB (typ)
Dynamic Range: 93dB (typ)
Internal High-Pass Filter
q
PCM AUDIO INTERFACE: Left Justified,
I
2
S
q
SAMPLING RATE: 4kHz to 48kHz
q
SYSTEM CLOCK: 256f
S
, 384f
S
, or 512f
S
q
SINGLE +5V POWER SUPPLY
q
SMALL SO-14 PACKAGE
DESCRIPTION
PCM1801 is a low cost, single chip stereo analog-to-
digital converter with single-ended analog voltage
inputs. The PCM1801 uses a delta-sigma modulator
with 64x oversampling, a digital decimation filter, and
a serial interface which supports Slave mode operation
and two data formats. The PCM1801 is suitable for a
wide variety of cost-sensitive consumer applications
where good performance is required.
© 1999 Burr-Brown Corporation
PDS-1554B
Printed in U.S.A. May, 2000
16-Bit, Stereo, Audio
ANALOG-TO-DIGITAL CONVERTER
For most current data sheet and other product
information, visit www.burr-brown.com
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
PCM1801
Clock/Timing Control
BYPAS
V
CC
V
DD
AGND
Reference
Format
Control
FMT
SCKI
Serial Data
Interface
DOUT
BCK
LRCK
V
IN
L
V
REF
1
V
REF
2
V
IN
R
Power Supply
DGND
(–)
(+)
x1/64
Decimation
and
High-Pass Filter
5th-Order
∆Σ
Modulator
5th-Order
∆Σ
Modulator
PCM1801
(+)
(–)
Single-Ended-
to-Differential
Converter
Single-Ended-
to-Differential
Converter
®
2
PCM1801
SPECIFICATIONS
All specifications at +25
°
C, +V
DD
= +V
CC
= +5V, f
S
= 44.1kHz, and 16-bit data, SYSCLK = 384f
S
, unless otherwise noted.
PCM1801U
PARAMETER
CONDITIONS MIN
TYP MAX UNITS
RESOLUTION
16 Bits
DIGITAL INPUT/OUTPUT
Input Logic Level:
V
IH
(1)
2.0
V
V
IL
(1)
0.8 V
Input Logic Current:
I
IN
(2)
±
1
µ
A
I
IN
(3)
+100
µ
A
Output Logic Level:
V
OH
(4)
I
OH
= –1.6mA 4.5
V
V
OL
(4)
I
OL
= +3.2mA
0.5 V
Sampling Frequency
4
44.1 48 kHz
System Clock Frequency
256f
S
1.024
11.2896 12.2880 MHz
384f
S
1.536
16.9344 18.4320 MHz
512f
S
2.024
22.5792 24.5760 MHz
DC ACCURACY
Gain Mismatch Channel-to-Channel
±
1.0
±
2.5 % of FSR
Gain Error
±
2.0
±
5.0 % of FSR
Gain Drift
±
20 ppm of FSR/
°
C
Bipolar Zero Error
High-Pass Filter Bypass
±
2.0 % of FSR
Bipolar Zero Drift
High-Pass Filter Bypass
±
20 ppm of FSR/
°
C
DYNAMIC PERFORMANCE
(5)
THD+N at FS (–0.5dB)
–88 –80 dB
THD+N at –60dB
–90 dB
Dynamic Range
EIAJ, A-weighted 90
93 dB
Signal-To-Noise Ratio
EIAJ, A-weighted 90
93 dB
Channel Separation
88
91 dB
ANALOG INPUT
Input Range
FS (V
IN
= 0dB)
2.828 Vp-p
Center Voltage
2.1 V
Input Impedance
30 k
Ω
Anti-Aliasing Filter Frequency Response
–3dB
170 kHz
DIGITAL FILTER PERFORMANCE
Passband
0.454f
S
Hz
Stopband
0.583f
S
Hz
Passband Ripple
±
0.05 dB
Stopband Attenuation
–65
dB
Delay Time (Latency)
17.4/f
S
sec
High Pass Frequency Response
–3dB
0.019f
S
mHz
POWER SUPPLY REQUIREMENTS
Voltage Range
+V
CC
+4.5
+5.0 +5.5 VDC
+V
DD
+4.5
+5.0 +5.5 VDC
Supply Current
(6)
+V
CC
= +V
DD
= +5V
18 25 mA
Power Dissipation
+V
CC
= +V
DD
= +5V
90 125 mW
TEMPERATURE RANGE
Operation
–25
+85
°
C
Storage
–55
+125
°
C
Thermal Resistance,
θ
JA
100
°
C/W
NOTES: (1) Pins 5, 6, 7, 9, and 10 (SCKI, BCK, LRCK, BYPAS, FMT). (2) Pins 5, 6, 7 (SCKI, BCK, LRCK) Schmitt-Trigger input. (3) Pins 9, 10 (BYPAS, FMT)
Schmitt-Trigger input with 100k
Ω
typical pull-down resistor). (4) Pin 8 (DOUT). (5) f
IN
= 1kHz, using Audio Precisions System II, r ms Mode with 20kHz LPF
and 400Hz HPF enabled. (6) No load on DOUT (pin 8).
®
3
PCM1801
PIN CONFIGURATION
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no
responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice.
No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN
product for use in life support devices and/or systems.
PIN
NAME
I/O
DESCRIPTION
1
V
IN
L
IN
Analog Input, Lch.
2
V
IN
R
IN
Analog Input, Rch.
3
DGND
—
Digital Ground
4
V
DD
—
Digital Power Supply
5
SCKI
IN
System Clock Input; 256f
S
, 384f
S
, or 512f
S
.
6
BCK
IN
Bit Clock Input
7
LRCK
IN
Sampling Clock Input
8
DOUT
OUT
Audio Data Output
9
BYPAS
IN
HPF Bypass Control
(1)
L: HPF Enabled
H: HPF Disabled
10
FMT
IN
Audio Data Format
(1)
L: MSB-First, Left-Justified
H: MSB-First, I
2
S
11
V
CC
—
Analog Power Supply
12
AGND
—
Analog Ground
13
V
REF
2
—
Reference 2 Decoupling Capacitor
14
V
REF
1
—
Reference 1 Decoupling Capacitor
NOTE: (1) With 100k
Ω
typical pull-down resistor.
PIN ASSIGNMENTS
Top View
SOIC
Supply Voltage: +V
DD,
+V
CC
.............................................................. +6.5V
Supply Voltage Differences ...............................................................
±
0.1V
GND Voltage Differences ..................................................................
±
0.1V
Digital Input Voltage ................................................. –0.3V to (V
DD
+ 0.3V)
Analog Input Voltage ................................................ –0.3V to (V
CC
+ 0.3V)
Input Current (any pin except supplies) ..........................................
±
10mA
Power Dissipation .......................................................................... 300mW
Operating Temperature Range ......................................... –25
°
C to +85
°
C
Storage Temperature ...................................................... –55
°
C to +125
°
C
Lead Temperature (soldering, 5s) .................................................. +260
°
C
(reflow, 10s) ..................................................... +235
°
C
ABSOLUTE MAXIMUM RATINGS
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
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.
PACKAGE
SPECIFIED
DRAWING
TEMPERATURE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
PACKAGE
NUMBER
RANGE
MARKING
NUMBER
(1)
MEDIA
PCM1801U
SO-14
235
–25
°
C to +85
°
C
PCM1801U
PCM1801U
Rails
"
"
"
"
"
PCM1801U/2K
Tape and Reel
NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K indicates 2000 devices per reel). Ordering 2000 pieces
of “PCM1801U/2K” will get a single 2000-piece Tape and Reel.
PACKAGE/ORDERING INFORMATION
V
IN
L
V
IN
R
DGND
V
DD
SCKI
BCK
LRCK
V
REF
1
V
REF
2
AGND
V
CC
FMT
BYPAS
DOUT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PCM1801U
®
4
PCM1801
BLOCK DIAGRAM
Clock/Timing Control
BYPAS
V
CC
V
DD
AGND
Reference
Format
Control
FMT
SCKI
Serial Data
Interface
DOUT
BCK
LRCK
V
IN
L
V
REF
1
V
REF
2
V
IN
R
Power Supply
DGND
(–)
(+)
x1/64
Decimation
and
High-Pass Filter
5th-Order
∆Σ
Modulator
5th-Order
∆Σ
Modulator
PCM1801
(+)
(–)
Single-Ended-
to-Differential
Converter
Single-Ended-
to-Differential
Converter
ANALOG FRONT-END (Single-Channel)
30k
Ω
1k
Ω
V
IN
L
V
REF
2
1
13
14
1k
Ω
Delta-Sigma
Modulator
(+)
(–)
V
REF
V
REF
1
+
+
1.0
µ
F
4.7
µ
F
+
4.7
µ
F
®
5
PCM1801
TYPICAL PERFORMANCE CURVES
At T
A
= +25
°
C, +V
DD
= +V
CC
= +5V, f
S
= 44.1kHz, and SYSCLK = 384f
S
, unless otherwise noted.
ANALOG DYNAMIC PERFORMANCE
TOTAL HARMONIC DISTORTION + NOISE
vs TEMPERATURE
Temperature (
°
C)
THD+N at –0.5dB (%)
0.006
0.005
0.004
0.003
0.002
–25
0
25
50
75
85
100
THD+N at –60dB (%)
3.0
2.8
2.6
2.4
2.2
–60dB
–0.5dB
SIGNAL-TO-NOISE RATIO AND DYNAMIC RANGE
vs TEMPERATURE
Temperature (
°
C)
SNR (dB)
96
95
94
93
92
–25
0
25
50
75 85
100
Dynamic Range (dB)
96
95
94
93
92
SNR
Dynamic Range
TOTAL HARMONIC DISTORTION + NOISE
vs SUPPLY VOLTAGE
Supply Voltage
(V)
THD+N at –0.5dB (%)
0.006
0.005
0.004
0.003
0.002
4.5
4.75
5.0
5.25
5.5
THD+N at –60dB (%)
3.0
2.8
2.6
2.4
2.2
–60dB
–0.5dB
SIGNAL-TO-NOISE RATIO AND DYNAMIC RANGE
vs SUPPLY VOLTAGE
SNR (dB)
96
95
94
93
92
Dynamic Range (dB)
96
95
94
93
92
SNR
Supply Voltage
(V)
4.5
4.75
5.0
5.25
5.5
Dynamic Range
TOTAL HARMONIC DISTORTION + NOISE
vs SAMPLING RATE
Sampling Rate (kHz)
THD+N at –0.5dB (%)
0.006
0.005
0.004
0.003
0.002
32
44.1
48
THD+N at –60dB (%)
3.0
2.8
2.6
2.4
2.2
–60dB
–0.5dB
SIGNAL-TO-NOISE RATIO AND DYNAMIC RANGE
vs SAMPLING RATE
Sampling Rate (kHz)
SNR (dB)
96
95
94
93
92
32
44.1
48
Dynamic Range (dB)
96
95
94
93
92
Dynamic Range
SNR
®
6
PCM1801
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
°
C, +V
DD
= +V
CC
= +5V, f
S
= 44.1kHz, and SYSCLK = 384f
S
, unless otherwise noted.
ANALOG DYNAMIC PERFORMANCE (cont.)
SUPPLY CURRENT vs TEMPERATURE
Temperature (
°
C)
Supply Current (mA)
20
16
12
8
4
0
–25
0
25
50
75
100
I
CC
+ I
DD
I
CC
I
DD
SUPPLY CURRENT vs SAMPLING RATE
Sampling Rate (kHz)
Supply Current (mA)
20
16
12
8
4
0
0
10
20
30
40
50
I
CC
I
CC
+ I
DD
I
DD
SUPPLY CURRENT vs SUPPLY VOLTAGE
Supply Voltage (V)
Supply Current (mA)
20
16
12
8
4
0
4.25
4.5
4.75
5.0
5.5
5.75
I
CC
+ I
DD
I
CC
I
DD
®
7
PCM1801
Full-Scale FFT
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
–140
0
5
10
15
20
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
°
C, +V
DD
= +V
CC
= +5V, f
S
= 44.1kHz, and SYSCLK = 384f
S
, unless otherwise noted.
OUTPUT SPECTRUM
–60dBFS FFT
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
–140
0
5
10
15
20
TOTAL HARMONIC DISTORTION + NOISE
vs AMPLITUDE
Amplitude (dBV)
THD+N (%)
100
10
1
0.1
0.01
0.001
–100
–80
–60
–40
–20
0
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
Frequency (Hz)
THD+N (%)
0.1
0.01
0.001
0.0001
20
100
1k
10k
20k
®
8
PCM1801
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
°
C, +V
DD
= +V
CC
= +5V, f
S
= 44.1kHz, and SYSCLK = 384f
S
, unless otherwise noted.
DIGITAL FILTER
OVERALL CHARACTERISTICS
Normalized Frequency (x f
S
Hz)
Amplitude (dB)
0
–50
–100
–150
–200
8
16
24
32
0
STOPBAND ATTENUATION CHARACTERISTICS
Normalized Frequency (x f
S
Hz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
0.25
0.50
0.75
1.00
0
PASSBAND RIPPLE CHARACTERISTICS
Normalized Frequency (x f
S
Hz)
Amplitude (dB)
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
0.1
0.3
0.2
0.4
0.5
0
TRANSITION BAND CHARACTERISTICS
Normalized Frequency (x f
S
Hz)
Amplitude (dB)
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.53 0.54 0.55
0.45
HIGH PASS FILTER RESPONSE
Normalized Frequency (x f
S
/1000Hz)
Amplitude (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0.1
0.05
0.2
0.15
0.3
0.25
0.4
-0.35
0
HIGH PASS FILTER RESPONSE
Normalized Frequency (x f
S
/1000Hz)
Amplitude (dB)
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
1.0
0.5
2.0
1.5
3.0
2.5
4.0
3.5
0
®
9
PCM1801
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
°
C, +V
DD
= +V
CC
= +5V, f
S
= 44.1kHz, and SYSCLK = 384f
S
, unless otherwise noted.
ANTI-ALIASING
ANTI-ALIASING FILTER
STOPBAND FREQUENCY RESPONSE
0
–5
–10
–15
–20
–25
–30
–35
–40
–45
–50
100
1k
10k
100k
1M
10M
Frequency (Hz)
Amplitude (dB)
ANTI-ALIASING FILTER
PASSBAND FREQUENCY RESPONSE
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
–1
1
10
100
1K
10K
100K
Frequency (Hz)
Amplitude (dB)
®
10
PCM1801
THEORY OF OPERATION
PCM1801 consists of a bandgap reference, two channels of
a single-to-differential converter, a fully differential 5th-
order delta-sigma modulator, a decimation filter (including
digital high pass), and a serial interface circuit. The Block
Diagram illustrates the total architecture of PCM1801, the
Analog Front-End diagram illustrates the architecture of the