®
HI2570, CXD2570
R NEW
NDED FO
S
DESIGN
September 1997
M ME
OT RECO
N
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>
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
Applications
- Telephones, TV Conference Systems, Language Lab-
oratory Equipment, TV Game Equipment and Elec-
tronic Musical Instrument
Ordering Information
PART
NUMBER
HI2570JCQ
CXD2570Q
TEMP.
RANGE (
o
C)
-20 to 55
-20 to 55
PACKAGE
48 Ld MPQF
48 Ld MPQF
PKG. NO.
Q48.12x12-S
Q48.12x12-S
Pinout
HI2570, CXD2570 (48 LEAD MQFP)
TOP VIEW
AOUT1+
AV
SS
3
WO
DASL1
DV
DD
DASL0
AIN1
AV
DD
1
AV
SS
1
SUB
AV
DD
3
AOUT1-
AV
SS
3
UCLK
XCLK
XV
DD
XTLI
XTLO
XV
SS
AV
SS
4
AOUT2-
AV
DD
4
1
2
3
4
5
6
7
8
9
10
48 47 46 45 44 43 42 41 40 39 38 37
36
35
34
33
32
31
30
29
28
27
NC
NC
XSL2
XSL1
XSL0
MLSL
MASL
DV
SS
SOUT
SIN
BCK
LRCK
MS
DV
DD
26
11
25
12
13 14 15 16 17 18 19 20 21 22 23 24
AV
SS
4
AV
SS
2
AIN2
AV
DD
2
DV
SS
XMCK2
SUB
NC
AOUT2+
TEST
CLR
NC
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
1
∑
File Number
4122.1
HI2570, CXD2570
Pin Descriptions
PIN NO.
1
2
3
4
AV
DD
3
AOUT1 (-)
AV
SS
3
UCLK
SYMBOL
I/O
—
O
—
O
DESCRIPTION
Analog power supply for channel-1 DA converter
Analog reversed phase output of channel-1 DA converter
Analog GND for channel-1 DA converter
Outputs a 1/2 frequency divider of clock input from oscillation pin XTLI (Pin 7).
User clock output for the externally connected ICs.
256Fs/512Fs clock output. This provides the master clock for ICs operating in
the slave mode when multiple CXD2570Qs are connected.
Digital power supply for the master clock
Crystal oscillation circuit input. Connects the crystal oscillator selected by the
crystal selector pins XSL0 to 2 (Pins 34, 35 and 36). To input an external mas-
ter clock, this pin is used.
Crystal oscillation circuit output. Connects the crystal oscillator selected by the
crystal selector pins XSL0 to 2 (Pins 34, 35 and 36).
Digital GND for the master clock
Analog GND for channel-2 DA converter
Analog reversed phase output of channel-2 DA converter
Analog power supply for channel-2 DA converter
Analog forward phase output of channel-2 DA converter
Analog GND for channel-2 DA converter
Analog GND for channel-2 AD converter
Analog input of channel-2 converter
Analog power supply for channel-2 AD converter
5
XCLK
O
6
7
XV
DD
XTLI
—
I
8
XTLO
O
9
10
11
12
13
14
15
16
17
18
19
XV
SS
AV
SS
4
AOUT2 (-)
AV
DD
4
AOUT2 (+)
AV
SS
4
AV
SS
2
AIN1
AV
DD
2
NC
SUB
—
—
O
—
O
—
—
I
—
—
—
Connected to the substrate in the IC (having the same potential as power sup-
ply). Connect this pin to GND via a capacitor on the external printed wiring
board.
20
21
22
23
24
NC
DV
SS
XMCK2
TEST
CLR
—
—
O
I
I
Digital GND
IC measurement. Normally, Low is output.
Test. Normally, fixed at Low. Equipped with a pull-down resistor.
System clear input. Normally, fixed at High; cleared at Low. Equipped with a
pull-up resistor.
Digital power supply.
Master/slave mode switching input. High = Master mode. Low = Slave mode.
Equipped with a pull-up resistor.
Sampling frequency clock pin of serial I/O. Outputs in master mode (when Pin
26 is High). Inputs in slave mode (when Pin 26 is Low). Transfers channel-1
data at High; transfers channel-2 data at Low.
25
26
DV
DD
MS
—
I
27
LRCK
I/O
3
HI2570, CXD2570
Pin Descriptions
PIN NO.
28
BCK
(Continued)
I/O
I/O
DESCRIPTION
Serial bit transfer clock for serial input data SIN or serial output data SOUT
(64FS). Outputs in master mode (when Pin 26 is High). Inputs in slave mode
(when Pin 26 is Low). Retrieves serial input data at
; send serial out-
put data at
.
Serial data input of 2-channel sampling. The data format is 2’s complement,
and consists of 32-bit slot.
Serial data output of 2-channel per sampling. The data format is 2’s comple-
ment, and consists of 32-bit slot.
Digital GND
Selects whether 16-bit serial data is applied in the first 16-bits or the last 16-
bit of 32-bit slot in serial I/O. High = Frontward truncation; Low = Rearward
truncation
Selects whether 16-bit serial data is input/output at LSB first or MSB first in
serial I/O. High = MSB first; Low = LSB first
Crystal oscillator selection. Three bits, XSL0 to 2. Selects the clock frequency
to be input from XTLI (Pin 7).
Crystal oscillator selection. Three bits, XSL0 to 2. Selects the clock frequency
to be input from XTLI (Pin 7).
Crystal oscillator selection. Three bits, XSL0 to 2. Selects the clock frequency
to be input from XTLI (Pin 7).
IC measurement. Normally, fixed at High.
IC measurement. Normally fixed at Low.
Window masked when High; window open when Low (forced synchroniza-
tion). Equipped with a pull-up resistor.
Digital power supply
SYMBOL
29
SIN
I
30
SOUT
O
31
32
DV
SS
MASL
—
I
33
34
MLSL
XSL0
I
I
35
XSL1
I
36
XSL2
I
37
38
39
DASL0
DASL1
WO
I
I
I
40
41
42
43
DV
DD
NC
NC
SUB
—
—
—
—
Connected to the substrate in the IC (having the same potential as power sup-
ply). Connect this pin to GND via capacitor on the external printed wiring
board.
Analog power supply for channel-1 AD converter
Analog input of channel-1 AD converter
Analog GND for channel-1 AD converter
Analog GND for channel-1 DA converter
Analog forward phase output of channel-1 DA converter
44
45
46
47
48
AV
DD
1
AIN1
AV
SS
1
AV
SS
3
AOUT1 (+)
—
I
—
—
O
4
HI2570, CXD2570
Absolute Maximum Ratings
T
A
= 25
o
C
Supply Voltage (V
DD
). . . . . . . . . . . . . . . . . . . . . . V
SS
–0.5V to 7.0V
Input Voltage (V
1
). . . . . . . . . . . . . . . . . . .V
SS
– 0.5V to V
DD
+ 0.5V
Output Voltage (V
0
) . . . . . . . . . . . . . . . . . V
SS
– 0.5V to V
DD
+ 0.5V
Operating Temperature (Topr) . . . . . . . . . . . . . . . . . . -20
o
C to 75
ο
C
Storage Temperature (Tstg . . . . . . . . . . . . . . . . . . . -55
o
C to 150
o
C
I/O Capacitance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MIN
.—
Input Pin (C
IN
)
Output Pin (C
OUT
) . . . . . . . . . . . . . . . . . . . —
Bidirectional Pin (C
I/O
) . . . . . . . . . . . . . . . . -—
Measurement conditions: V
DD
= V
1
= 0V, f = 1MHz
TYP
—
—
—
MAX
9pF
11pF
11 pF
Recommended Operating Conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MIN
Supply Voltage (Note 1) (V
DD
)
4.5V
Ambient Temperature (T
A
) . . . . . . . . . . . . . . -20
o
C
Sampling Frequency (Note 2) (F
S
). . . . . . . . 7kHz
TYP
5.0V
—
—
MAX
5.5V
+75
o
C
33kHz
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. The analog power supplies for AD converters (Pins 17 and 44) must be turned on simultaneously with or before other poser supplies.
turning on these power supplies after any other power supply may cause the device to fall into latch-up condition. this precaution, how-
ever, does not apply when turning off the power supplies.
2. Although the device can operate with F
S
frequencies such as F
S
= 44.1kHz or 48kHz, its analog characteristics deteriorate to extent.
When used at only these F
S
frequencies, the CXD255Q is recommended that is pin-compatible with the CXD2570Q.
Electrical Specifications
TEST
CONDITIONS
PART NUMBER
OR GRADE
MIN
TYP
MAX
UNITS
APPLICABLE
PINS
PARAMETER
DC Characteristics
Input Voltage
SYMBOL
AV
DD
1 = AV
DD
2 = AV
DD
3 = AV
DD
4 = XV
DD
= DV
DD
= 5.0V ± 10%, AV
SS
1 = AV
SS
2 = AV
SS
3 = AV
SS
4 =
XV
SS
= DV
SS
= 0V, T
A
= -20
o
C to 75
o
C
V
IHC
V
ILC
V
IN
Analog Input
I
OH
= -2mA
I
OL
= 4mA
I
OH
= -4mA
I
OL
= 4mA
I
OH
= -12mA
I
OL
= 16mA
I
OH
= -2mA
I
OL
= 4mA
0.7V
DD
Ò
V
SS
V
DD
-0.5
0
V
DD
-0.5
0
V
DD
/2
0
V
DD
-0.8
0
-10
-40
-20
20
-40
V
IN
= V
SS
or V
DD
(Note 3)
250K
—
—
Ò
—
—
—
—
—
—
—
—
—
—
—
-50
50
—
1M
43
—
0.3V
DD
V
DD
V
DD
0.4
V
DD
0.4
V
DD
V
DD
/2
V
DD
0.4
10
40
-12-
120
40
‘2.5M
60
µA
µA
µA
µA
µA
Ω
mA
*7
*8
*9
*10
*11
*12
V
*6
V
*5
V
*4
V
V
*2
*3
V
*1
Output Voltage
V
OH1
V
OL1
V
OH2
V
OL2
V
OH3
V
OL3
V
OH4
V
OL4
Input Leak Current 1
Input Leak Current 2
Input Leak Current 3
Input Leak Current 4
Output Leak Current
Feedback Resistance
Supply Current
AC Characteristics
SIN Setup Time
SIN Hold Time
LRCK Setup Time
LRCK Hold Time
LRCK Delay Time
I
LI1
I
LI2
I
LI3
I
LI4
I
LZ
R
FB
I
DD
AV
DD
1 = AV
DD
2 = AV
DD
3 = AV
DD
4 = XV
DD
= DV
DD
= 5.0V ± 10%, AV
SS
1 = AV
SS
2 = AV
SS
3 = AV
SS
4 =
XV
SS
= DV
SS
= 0V, T
A
= -20
o
C to 75
o
C
tsus
ths
tsul
thl
tdl
Slave mode
Slave mode
Master mode
CL = 130pF
10
15
10
15
-40
—
—
—
—
—
—
—
—
—
30
ns
ns
ns
ns
ns
5
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