
1
September 1997
HI2570, CXD2570
1-Bit AD/DA
Converter For Audio Application
Features
Two-Channel AD/DA Converters and Their Each Deci-
mation and Oversampling Digital Filter in a Single Chip
Simplified External Parts with a Built-In Analog Circuit
Around AD Converter
Distortion
- ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.015%
- DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.009% (-3dB)
S/N Ratio (Typical Values when F
S
= 16kHz)
- ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80dB
- DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90dB
Ripple in the Digital Filter Pass Band
. . . . . . . ±
0.05dB<
Attenuation in the Digital Filter Rejection Band. . . 45dB>
Applications
- Telephones, TV Conference Systems, Language Lab-
oratory Equipment, TV Game Equipment and Elec-
tronic Musical Instrument
Ordering Information
Description
The HI2570, CXD2570 is a 1-bit stereo AD/DA converter
which uses a 2nd-order
∑
system noise shaper. This LSI is
especially suited for sampling frequency between 8kHz and
32kHz.
Function
Data Can Be Input/Output at Rate of 1xF
S
with a Built-
In Digital Filter
Multi-Channel Systems can be Connected Using Several
HI2570, CXD2570Qs
The 32-Slot Serial Data Interface Enables Independent
Selection of Data Frontward Truncation/Rearward
Truncation and MSB First/LSB First
512F
S
/1024F
S
(when F
S
= 8 to 16kHz) or 256F
S
/512F
S
/
768F
S
/1024F
S
(When F
S
= 16 to 32kHz) Can be Used
as the Master Clock
The Sampling Frequency of Not Only 8kHz or 16kHz, but
32kHz or 44.1kHz Can Be Used for Audio Equipment
Various Frequency Divided Clocks are Output for LSIs
Connected
Pinout
HI2570, CXD2570 (48 LEAD MQFP)
TOP VIEW
A
PART
NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG. NO.
HI2570JCQ
-20 to 55
48 Ld MPQF
Q48.12x12-S
CXD2570Q
-20 to 55
48 Ld MPQF
Q48.12x12-S
1
2
3
4
5
6
7
8
9
10
11
1213 14 15 16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
XSL2
XSL1
XSL0
MLSL
MASL
DV
SS
SOUT
SIN
BCK
LRCK
MS
DV
DD
AV
DD
3
AOUT1-
AV
SS
3
UCLK
XCLK
XV
DD
XTLI
XTLO
XV
SS
AV
SS
4
AOUT2-
AV
DD
4
A
S
3
A
S
1
A
A
D
1
N
N
D
D
W
D
D
S
A
A
S
4
A
S
2
A
A
D
2
N
S
N
D
S
X
T
C
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002. All Rights Reserved
File Number
4122.1
NOT RECOMMENDED FOR NEW DESIGNS