MSB Technology MPACD-512 Owners manual

PLATINUM

M
M

24 BIT D

M

AGNITUDE

ISCRETE

3 MHZ S

L

ADDER

IGN

DAC

BY MSB TECHNOLOGY

MP-ACD512

Features

• Designed specifically for high resolution digital audio

• True voltage output, no I/V converter required

• Low unbuffered output impedance 750 Ohms

• Built in high speed buffer (MP-ACD512B only)

• Ultra high dynamic range, 125 dB typical (<120dB guaranteed)

• 0Hz to 3.125MHz conversion rate (16x oversampling @ 192kHz or 8x @ 384 kHz)

• Integrated metal shield

• Low external parts count

Description

The MP-ACD512 is an ultra high performance 24 bit direct conversion audio DAC that pro­vides excellent performance. The sign magnitude DAC architecture ensures the best possible perfor­mance for small and large signals without averaging (like a Delta-sigma data converter.) A fast conver­sion rate, low noise and distortion at all signal levels delivers industry leading digital audio with a
minimum of external components.

Offered with an internal buffer (MP-ACD512B) or without (MP-ACD512U.)

Bit Clock

Word Clock

DATA

Reset

Differential
Conversion
Clock

+5V Digital +12V Analog

24 Bit Shift

Register

Decoding

Reference

Conversion Registers

+ DAC

- DAC

Ref

Bffr

P-ACD512U

Reference
Output

Un-buffered
Output

+ 15V

- 15V

Buffered
Output

P-ACD512B

Digital GND

2003 MSB Technology Corporation Page 1
www.MSBTECH.com 14251 Pescadero Road, La Honda, Ca 94020 Phone [phone] Fax [phone]

Analog GND

PLATINUM

Specifications for MP-ACD512

All Specifications measured at 25ºC, +VD = 5V, +VR = 12V, +VA = 12V, -VA = -12V, FS = 384Khz, Data = 24bit

Parameter Conditions Minimum Typical Maximum Units

Resolution

24 Bits

Data Format

Audio Data Format 24-Bit, MSB First, Two’s Complement
Sampling Frequency 0 3125 KHz
Serial Clock Frequency 75

MHz

Digital Input

+VD = 5V
Logic High Level 3.8 5.25 V
Logic Low Level -0.25 1.6 V

Conversion Clock

+VR > 9V
+CCLK Input Range -0.25 5.25 V

-CCLK Input Range -0.25 5.25 V

Analog Output

Output Range (14) Buffered -5 5 V
Output Range (12) Unbuffered 0 5 V
Output Current (14) Buffered -25 25 mA
Output Current (12)

Unbuffered

0 6.67 mA
Output Impedance (14) Buffered 5 Ohm
Output Impedance (12)

Unbuffered

750 Ohm

Reference Out

MP-ACD512U

4.995 5.000 5.005 V

DC Accuracy

Bipolar Zero Error (14) Buffered -5 5 mV
Bipolar Zero Error (12) Unbuffered -1 1 mV
Gain Error (14) Buffered 0.8 0.8 % FSR
Gain Error (12) Unbuffered 0.5 0.5 % FSR

Dynamic Performance

THD+N 0dB 0.006 0.009 %
THD+N -60dB 0.03 0.1 %
Dynamic Range A-weighted 120 125 dB
Signal to Noise Ratio A-weighted 135 140 dB
Low Level Linearity 1KHz –90bB -0.25 0.25 dB
Settling Time 100 200 ns

Power Requirements

Positive Digital (+VD) 4.75 5.00 5.25 V

16 30 mA

Positive Analog (+VR) 10 12 15 V

25 35 mA

Positive Buffer (+VA)

MP-ACD512B

81215V

10 35 mA

Negative Buffer (-VA)

MP-ACD512B

-15 -12 -8 V

-35 -10 mA

24 BIT D

M

AGNITUDE

ISCRETE

3 MHZ S

L

BY MSB TECHNOLOGY

MP-ACD512

2003 MSB Technology Corporation Page 2
www.MSBTECH.com 14251 Pescadero Road, La Honda, Ca 94020 Phone [phone] Fax [phone]

ADDER

IGN

DAC

PLATINUM

BY MSB TECHNOLOGY

24 BIT D

M

AGNITUDE

ISCRETE

3 MHZ S

L

ADDER

MP-ACD512

IGN

DAC

Pin Assignments for MP-ACD512

Pin Assignments are for all versions except where noted

Pin # Pin Name Function

1 DGND Digital Ground, connected internally to AGND
2 +VD Digital Power Input, 5V supply
3 DGND Digital Ground
4 RST Shift Register Reset Input, Low = Reset, High = Shift
5 DGND Digital Ground
6 DATA Two’s Compliment Data Input 24-Bit, MSB First, Right Justified
7 BCLK Bit Clock Input, Data is shifted on High to Low transition
8 WCLK Word Frame Clock, Data is latched on High to Low transition
9 DGND Digital Ground
10 -CCLK ½ DAC Conversion Clock Input, DAC converts on High to Low
11 +CCLK ½ DAC Conversion Clock Input, DAC converts on Low to High
12 OUT Unbuffered Analog Output, 750 Ohm, 0V - 5V
13 AGND Analog Ground, connected to DGND internally
14 BUFF/REF MP-ACD512B = Buffered Analog Output

MP-ACD512U = 5V Reference Output
15 AGND Analog Ground
16 AGND Analog Ground
17 +VR Internal Reference Power Supply Input, 10V - 15V
18 AGND Analog Ground
19 +VA MP-ACD512B, Buffer Power Supply Input, 8V - 15V

MP-ACD512U,NoConnection
20 -VA MP-ACD512B, Buffer Power Supply Input, -8V - -15V

MP-ACD512U,NoConnection
21 AGND Analog Ground

2003 MSB Technology Corporation Page 3
www.MSBTECH.com 14251 Pescadero Road, La Honda, Ca 94020 Phone [phone] Fax [phone]