Burr Brown PCM1800E, PCM1800E-2K Datasheet

®

1 PCM1800

49%
FPO

PCM1800

®

FEATURES

● DUAL 20-BIT MONOLITHIC ∆Σ ADC

● SINGLE-ENDED VOLTAGE INPUT

● 64X OVERSAMPLING DECIMATION FILTER:

Passband Ripple:

±0.05dB

Stopband Attenuation: –65dB

● HIGH PERFORMANCE:

THD+N: -88dB (typ)
SNR: 95dB (typ)
Dynamic Range: 95dB (typ)
Internal High Pass Filter

● PCM AUDIO INTERFACE:

Master/Slave Modes
4 Data Formats

● SAMPLING RATE: 32kHz, 44.1kHz, 48kHz

● SYSTEM CLOCK: 256f

S

, 384fS, or 512f

S

● SINGLE +5V POWER SUPPLY

● SMALL 24-PIN SSOP PACKAGE

DESCRIPTION

PCM1800 is a low cost, single chip stereo analog-to­digital converter with single-ended analog voltage
inputs. The PCM1800 uses a delta-sigma modulator
with 64X oversampling, including a digital decima­tion filter and serial interface which supports both
Master and Slave Modes and four data formats.
PCM1800 is suitable for a wide variety of cost-sensi­tive consumer applications where high performance is
required.

PCM1800 is fabricated on a highly advanced CMOS
process.

© 1997 Burr-Brown Corporation PDS-1387 Printed in U.S.A. August, 1997

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Single-Ended Analog Input 20-Bit Stereo

ANALOG-TO-DIGITAL CONVERTER

PCM1800

Analog Input (L)

Analog Input (R)

Analog Front-End

Delta-Sigma

Modulator

Decimation

Digital

Filter

Serial Interface

and

Format Control

Digital Output
Mode/Format Control

System Clock

®

2

PCM1800

SPECIFICATIONS

All specifications at +25°C, +VDD = +V

CC

= +5V, fS = 44.1kHz, and 20-bit input data, SYSCLK = 384fS, unless otherwise noted.

PCM1800E

PARAMETER CONDITIONS MIN TYP MAX UNITS
RESOLUTION 20 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 µA

I

IN

(3)

+100 µA

Output Logic Level:

V

OH

(4)

IOH = –1.6mA 4.5 V

V

OL

(4)

IOL = +3.2mA 0.5 V
Sampling Frequency 32 44.1 48 kHz
System Clock Frequency 256f

S

8.1920 11.2896 12.2880 MHz

384f

S

12.2880 16.9344 18.4320 MHz

512f

S

16.3840 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 –92 dB
Dynamic Range EIAJ, A-weighted 90 95 dB
Signal-To-Noise Ratio EIAJ, A-weighted 90 95 dB
Channel Separation 88 93 dB

DYNAMIC PERFORMANCE

(5)

Dynamic Range 16-Bit, A-weighted 94 dB
Signal-To-Noise Ratio 16-Bit, A-weighted 94 dB
Channel Separation 16-Bit 92 dB

ANALOG OUTPUT

Input Range FS (V

IN

= 0dB) 2.828 Vp-p
Center Voltage 2.1 V
Input Impedance 30 kΩ
Anti-Aliasing Filter Frequency Response C

EXT

= 470pF, –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)

+VCC = +VDD = +5V 18 25 mA

Power Dissipation +V

CC

= +VDD = +5V 90 125 mW

TEMPERATURE RANGE

Operation –25 +85 °C
Storage –55 +125 °C
Thermal Resistance,

θ

JA

100 °C/W

NOTES: (1) Pins 6, 7, 8, 9, 10, 11, 16 and 12, 13, 14: RSTB, BYPAS, FMT0, FMT1, MODE0, MODE1, SYSCLK, and FSYNC, LRCK, BCK under Slave Mode.
(2) Pins 16 and 12, 13, 14: SYSCLK and FSYNC, LRCK, BCK under Slave Mode (Schmitt Trigger input). (3) Pins 6, 7, 8, 9, 10, 11: RSTB, BYPAS, FMT0,
FMT1, MODE0, MODE1 (Schmitt Trigger input, with 100kΩ typical pull-down resistor). (4) Pins 15 and 12, 13, 14: DOUT and FSYNC, LRCK, BCK under Master
Mode. (5) f

IN

= 1kHz, using Audio Precisions System II, rms Mode with 20kHz LPF and 400Hz HPF in calculation. (6) No load on DOUT (pin 15) in the Slave

Mode.

®

3 PCM1800

VINL
V

REF

1
REFCOM
V

REF

2
V

IN

R
RSTB
BYPAS
FMT0
FMT1
MODE0
MODE1
FSYNC

AGND

V

CC

CINPL
C

IN

NL

C

IN

PR

C

IN

NR

V

DD

DGND

SYSCLK

DOUT

BCK

LRCK

1
2
3
4
5
6
7
8

9
10
11
12

24
23
22
21
20
19
18
17
16
15
14
13

PCM1800

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

1V

IN

L IN Analog Input, Lch

2V

REF

1 — Reference 1 Decoupling Capacitor
3 REFCOM — Reference Decoupling Common
4V

REF

2 — Reference 2 Decoupling Capacitor
5V

IN

R IN Input Reference, Rch

6 RSTB IN Reset Input, Active LOW

(1)

7 BYPAS IN High Pass Filter Bypass Control

(1)

8 FMT0 IN Audio Data Format 0

(1)

9 FMT1 IN Audio Data Format 1

(1)

10 MODE0 IN Master/Slave Mode Selection 0

(1)

11 MODE1 IN Master/Slave Mode Selection 1

(1)

12 FSYNC IN/OUT Frame Synchronization
13 LRCK IN/OUT Sampling Clock Input/Output (f

S

)
14 BCK IN/OUT Bit Clock Input/Output
15 DOUT OUT Audio Data Output
16 SYSCLK IN System Clock Input, 256f

S

, 384fS, or 512f

S

17 DGND — Digital Ground
18 V

DD

— Digital Power Supply

19 C

IN

NR — Anti-alias Filter Capacitor (–), Rch

20 C

IN

PR — Anti-alias Filter Capacitor (+), Rch

21 C

IN

NL — Anti-alias Filter Capacitor (–), Lch

22 C

IN

PL — Anti-alias Filter Capacitor (+), Lch

23 V

CC

— Analog Power Supply

24 AGND — Analog Ground

NOTE: (1) With 100kΩ typical pull-down resistor.

PIN ASSIGNMENTS

Top View SSOP

Supply Voltage: +V

DD, +VCC

......................................................................................

+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

PACKAGE DRAWING

PRODUCT PACKAGE NUMBER

(1)

PCM1800E 24-Pin SSOP 338

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.

PACKAGE INFORMATION

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.

®

4

PCM1800

BLOCK DIAGRAM

ANALOG FRONT-END (Single-Channel)

30kΩ

1kΩ

C

EXT

470pF

2122

VINL

V

REF

2

C

IN

PL CINNL

1

4

3

2

1kΩ

Delta-Sigma

Modulator

(+)

(–)

V

REF

REFCOM

V

REF

1

+

+

1.0µF

4.7µF

+

4.7µF

Clock/Timing Control
Reset/Power Control

BYPAS

V

CC

V

DD

AGND

Reference

Mode/Format

Control

Interface

FMT0
FMT1

SYSCLK
RSTB

MODE0
MODE1

Serial Data

Interface

DOUT

BCK

LRCK

FSYNC

C

IN

PL

C

IN

NL

V

IN

L

V

REF

1

V

REF

2

V

IN

R

C

IN

NR

C

IN

PR

Power Supply

DGND

(–)

(+)

x1/64

Decimation

and

High Pass Filter

5th-Order

Delta-Sigma

Modulator

5th-Order

Delta-Sigma

Modulator

ADC

(+)

(–)

Single-End/

Differential

Converter

Single-End/

Differential

Converter

REFCOM

®

5 PCM1800

TYPICAL PERFORMANCE CURVES

At TA = +25°C, +VDD = +V

CC

= +5V, fS = 44.1kHz, and 20-bit input data, SYSCLK = 384fS, unless otherwise noted.

THD+N vs POWER SUPPLY

Supply Voltage

(V)

THD+N at –0.5dB (%)

0.010

0.008

0.006

0.004

0.002

4.5 4.75 5.0 5.25 5.5

THD+N at –60dB (%)

4.0

3.0

2.0

1.0

0

–60dB

–0.5dB

SNR and DYNAMIC RANGE vs POWER SUPPLY

Supply Voltage (V)

SNR (dB)

98

96

94

92

90

4.5 4.75 5.0 5.25 5.50

Dynamic Range (dB)

98

96

94

92

90

SNR

Dynamic Range

THD+N vs SYSTEM CLOCK

and SAMPLING FREQUENCY

System Clock

THD+N at –0.5dB (%)

0.010

0.008

0.006

0.004

0.002
256f

S

384f

S

512f

S

THD+N at –60dB (%)

4.0

3.0

2.0

1.0

0

48kHz

44.1kHz

32kHz

48kHz

32kHz

–60dB

–0.5dB

44.1kHz

THD+N vs OUTPUT DATA RESOLUTION

Resolution

THD+N at –0.5dB (%)

THD+N at –60dB (%)

0.010

0.008

0.006

0.004

0.002
16-Bit 20-Bit

4.0

3.0

2.0

1.0

0

–0.5dB

–60dB

THD+N vs TEMPERATURE

Temperature (°C)

THD+N at –0.5dB (%)

0.010

0.008

0.006

0.004

0.002
–25 0 25 50 75 85 100

THD+N at –60dB (%)

4.0

3.0

2.0

1.0

0

–60dB

–0.5dB

SNR, DYNAMIC RANGE vs TEMPERATURE

Temperature (°C)

SNR (dB)

98

96

94

92

90

–25 0 25 50 75 85 100

Dynamic Range (dB)

4.0

3.0

2.0

1.0

0

SNR

Dynamic Range