MagAlpha PCM1704 User Manual

®

PCM1704

49%

PCM1704

FPO

24-Bit, 96kHz

BiCMOS Sign-Magnitude

DIGITAL-TO-ANALOG CONVERTER

FEATURES

● SAMPLING FREQUENCY (fS): 16kHz to 96kHz

● 8X OVERSAMPLING AT 96kHz

● INPUT AUDIO DATA WORD: 20-, 24-Bit

● HIGH PERFORMANCE:

Dynamic Range: K Grade = 112dB typ
SNR: 120dB typ
THD+N: K Grade = 0.0008% typ

● FAST CURRENT OUTPUT: ±1.2mA/200ns

● GLITCH-FREE OUTPUT

● PIN-PROGRAMMABLE DATA INVERSION

● POWER SUPPLY: ±5V

● SMALL 20-LEAD SO PACKAGE

TM

DESCRIPTION

The PCM1704 is a precision, 24-bit digital-to-analog
converter with exceptionally high dynamic perfor­mance. The ultra-low distortion and excellent low­level signal performance makes the PCM1704 an ideal
candidate for high-end consumer and professional
audio applications. When used with a digital interpo­lation filter, the PCM1704 supports 8X oversampling
at 96kHz.

The PCM1704 incorporates a BiCMOS sign-magni­tude architecture that eliminates glitches and other
nonlinearities around bipolar zero. The PCM1704 is
precision laser-trimmed at the factory to minimize
differential linearity and gain errors.

In addition to high performance audio systems, the
PCM1704 is well-suited to waveform synthesis appli­cations requiring very low distortion and noise.

SBAS097

BCLK

WCLK

DATA

20-BIT

INVERT

REF DC SERVO DC DGND +V

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

© 1998 Burr-Brown Corporation PDS-1454C Printed in U.S.A. February, 1999

Serial Input

and

Control Logic

Reference and Servo

–V

DD

23-Bit DAC A

23-Bit DAC B I

Bipolar Offset

Power Supply

AGND

DD–VCC

+VCCBPO DC

OUT

SPECIFICATIONS

All specifications at TA = +25°C, ±VCC = ±V

PARAMETER CONDITIONS MIN TYP MAX UNITS
RESOLUTION 24 Bits

DATA FORMAT

Audio Data Interface Format 20-, 24-Bit, MSB-First
Audio Data Code Binary Two’s Complement
Sampling Frequency (f

) 16 96 kHz

S

Input Clock Frequency 25 MHz

DIGITAL INPUT/OUTPUT

Input Logic Level:

(1)

V

IH

(1)

V

IL

(2)

V

IH

(2)

V

IL

Input Logic Current:

(1)

I

IH

(1)

I

IL

(2)

I

IH

(2)

I

IL

DYNAMIC PERFORMANCE(3)

THD+N V

= 0dB PCM1704U 0.0025 0.0030 %

O

V

=–20dB PCM1704U 0.008 0.020 %

O

Dynamic Range EIAJ, A-weighted

Signal-to-Noise Ratio EIAJ, A-weighted 112 120 dB
Low Level Linearity f = 1002Hz at –90dB ±0.5 dB

DC ACCURACY

Gain Error ±1.0 ±3.0 % of FSR
Bipolar Zero Error ±0.5 ±1.0 % of FSR
Gain Drift 0°C to 70°C ±25 ppm of FSR/°C
Bipolar Zero Error Drift 0°C to 70°C ±5 ppm of FSR/°C

ANALOG OUTPUT

Output Range ±1.2 mA
Output Impedance 1.0 kΩ
Settling Time ±0.0003% of FSR, ±1.2mA Step 200 ns

POWER SUPPLY REQUIREMENTS

Voltage Range: +V

Combined Supply Current:+I

= +V

CC

–VCC = –V

DD
DD

CC

–I

CC

TEMPERATURE RANGE

Operation –25 +85 °C
Storage –55 +125 °C

NOTES: (1) BCLK, WCLK, DATA. (2) 20BIT, INVERT. (3) Dynamic performance data is tested with 5534 I/V amp with 7.5kΩ feedback resistor. THD+N data is
tested by Shibasoku 725C with 30kHz external LPF, 400Hz HPF, average mode. Input signal frequency = 1.1kHz.

= ±5V, fS = 768kHz (96kHz • 8), and 24-bit data, unless otherwise noted.

DD

+2.0 +5.0 V

0 +0.8 V
–3.0 0 V
–5.0 –4.2 V

VIH = +V

DD

VIL = 0V ±10 µA

VIH = 0V ±10 µA

VIL = –V

DD

PCM1704U-J 0.0015 0.0025 %
PCM1704U-K 0.0008 0.0015 %

PCM1704U-J 0.007 0.015 %
PCM1704U-K 0.006 0.01 %

PCM1704U, U-J 102 110 dB

PCM1704U-K 106 112 dB

+4.75 +5.0 +5.25 VDC

–4.75 –5.0 –5.25 VDC
+VCC = +VDD = +5.0V 5 8 mA
–VCC = –VDD = –5.0V 30 45 mA

PCM1704U

±10 µA

–100 µA

®

PCM1704

2

PIN CONFIGURATION

TOP VIEW SOIC

DATA

BCLK

NC

–V

DGND

+V

WCLK

NC

20BIT

INVERT

1
2
3
4

DD

5
6

DD

7
8
9

10

PCM1704U

20
19
18
17
16
15
14
13
12
11

–V

CC

REF DC
NC
SERVO DC
AGND
AGND
I

OUT

NC
BPO DC
+V

CC

PACKAGE INFORMATION

PRODUCT PACKAGE RANGE NUMBER

TEMPERATURE DRAWING

PCM1704U 20-Lead SOIC –25°C to +85°C 248

PACKAGE

PIN ASSIGNMENTS

PIN NAME I/O FUNCTION

1 DATA IN Serial Audio Data Input.
2 BCLK IN Bit Clock Input for Serial Audio Data.
3 NC — No Connection.
4–V
5 DGND — Digital Ground.
6+V
7 WCLK IN Data Latch Enable Input.
8 NC — No Connection.

9 20BIT IN Input Data Word Selection
10 INVERT IN Input Data Polarity Selection
11 +V
12 BPO DC — Bipolar Offset Decoupling Capacitor.
13 NC — No Connection.
14 I
15 AGND — Analog Ground.
16 AGND — Analog Ground.
17 SERVO DC — Servo Amplifier Decoupling Capacitor.
18 NC — No Connection.
19 REF DC — Band Gap Reference Decoupling Capacitor.

(1)

20 –V

NOTE: (1) Internal pull-up resistors. Input level must be a voltage from –V
to DGND.

DD

DD

CC

OUT

CC

— Digital Power, –5V.

— Digital Power, +5V.

(1)

.

(1)

— Analog Power, +5V.

OUT Current Output for Audio Signal.

— Analog Power, –5V.

.

DD

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

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, +VDD ,+VCC............................................................. +6.5V

Supply Voltage Differences .............................................................. ±0.1V

GND Voltage Differences ................................................................. ±0.1V

Digital Input Voltage

(BCLK, WCLK, DATA) ............................ DGND –0.3V to (+V

(20BIT, INVERT).................................... –V

Input Current (any pins except supply pins) ................................... ±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

Package Temperature (reflow, 10s) .............................................. +235°C

– 0.3V to (DGND + 0.3V)

DD

+ 0.3V)

DD

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.

3 PCM1704

®

SPECIFICATIONS

All specifications at +25°C, ±VCC and ±VDD = ±5.0V, unless otherwise noted.

100

10

1

0.1

THD+N (%)

0.10

0.001

0.0001
–100 –90 –80 –70 –60 –40 –30 –10–20–50

THD+N vs LEVEL

24-Bit Data

Output Level (dBFS)

DAC OUTPUT

–110dB, 24-Bit, 96kHz

16-Bit Data

0

–20

–40

–60

THD+N (dB)

–80

–100

–120

0

–80

–90

–100

–110

–120

Amplitude (dB)

–130

–140

–150

20.0 2.02k 4.02k 6.01k 8.01k 10.0k 12.0k 14.0k 16.0k 18.0k 20.0k

–90dB SIGNAL SPECTRUM

Output Frequency (Hz)

DAC OUTPUT

–110dB, 20-Bit, 96kHz

–120dB, 24-Bit, 96kHz

®

PCM1704

DAC OUTPUT

DAC OUTPUT

–120dB, 20-Bit, 96kHz

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