[AK5720]
AK5720
96kHz 24-Bit
ADC
1. General Description
The AK5720 is a low voltage 24-bit A/D converter for digital audio systems. The AK5720 includes an
Input Gain Amplifier, making it suitable for microphone applications. The analog signal input of the
AK5720 is single-ended, eliminating the need for external filters. The AK5720 is housed in a
space-saving 16-pin TSSOP package.
2. Features
1. Resolution: 24bits
2. Recording Functions
Gain Amplifier (0dB / +15dB)
Digital HPF for DC-offset cancellation (fc=1.0Hz@fs=48kHz)
3. ADC Characteristics
Single-ended Input
Input Level: 1.8Vpp@VA=3.0V (= 0.6 × VA), 3.0Vpp@VA=5.0V (=0.6 × VA)
S/(N+D): 94dB
DR, S/N: 102dB
4. Master Clock: 256fs/384fs/512fs/768fs
5. Sampling Frequency: 8kHz 96kHz
6. Audio Data Format: MSB First, 2’s compliment
24-bit MSB justified, I
2
S and TDM
7. Power Supply
VA, VD: 2.7
5.5V (typ. 3V, 5V)
8. Power Supply Current: 6.1mA(VA-VD=5.0V,fs=48kHz)
9. Operating Temperature: Ta = -40
105C
10. Package: 16-pin TSSOP
GSEL
DIF/TDMI
LIN
ADC
HPF
IIIS/TDM
Out
LRCK
BICK
SDTO
RIN
VD
VCOM
VA
REGO
VSS
Regulator
Clock Divider
PDN
FSEL
CKS
MCLK
MS1641-E-02
-1-
2014/12
[AK5720]
3. Table of Contents
1.
2.
3.
4.
General Description ....................................................................................................................................1
Features .......................................................................................................................................................1
Table of Contents........................................................................................................................................2
Pin Configurations and Functions ..............................................................................................................3
■
Ordering Guide ..........................................................................................................................................3
■
Pin Layout .................................................................................................................................................3
■
Functions ...................................................................................................................................................4
■
Handling of Unused Pin ............................................................................................................................4
5. Absolute Maximum Ratings .......................................................................................................................5
6. Recommended Operating Conditions .........................................................................................................5
7. Analog Characteristics (VA=VD=5.0V) ....................................................................................................6
8. Analog Characteristics (VA=VD=3.0V) ....................................................................................................7
9. Filter Characteristics (fs=48kHz) ...............................................................................................................8
10.
Filter Characteristics (fs=96kHz) ...........................................................................................................9
11.
DC Characteristics ..................................................................................................................................9
12.
Switching Characteristics .....................................................................................................................10
■
Timing Diagram ......................................................................................................................................12
13.
Functional Descriptions ........................................................................................................................16
■
System Clock ...........................................................................................................................................16
■
Audio Interface Format ...........................................................................................................................16
■
Digital High Pass Filter ...........................................................................................................................18
■
Power Down ............................................................................................................................................18
■
System Reset ...........................................................................................................................................19
■
TDM Cascade Mode ...............................................................................................................................19
14.
Recommended External Circuits ..........................................................................................................21
15.
Package .................................................................................................................................................23
■
Outline Dimensions .................................................................................................................................23
■
Material & Lead Finish ...........................................................................................................................23
■
Marking ...................................................................................................................................................24
16.
Revision History ...................................................................................................................................24
IMPORTANT NOTICE
................................................................................................................................25
MS1641-E-02
-2-
2014/12
[AK5720]
■
Functions
No. Pin Name
1
2
3
4
5
6
7
8
9
10
11
12
VCOM
RIN
LIN
VSS
VA
VD
GSEL
REGO
SDTO
LRCK
MCLK
BICK
I/O
O
I
I
-
-
-
I
O
O
I/O
I
I/O
Function
ADC Common Voltage Output Pin
Rch Input Pin
Lch Input Pin
Ground Pin
Analog Power Supply Pin
Digital Power Supply Pin
Input Gain Select Pin
“L”: 0dB, “H”: +15dB
Regulator Output Pin
Power Down
Status
Pull-down to VSS
with NMOS
(0.5kΩ)
Hi-z
Hi-z
-
-
-
Hi-z
Pull-down to VSS
with 500Ω
“L” (VSS)
Hi-z
Hi-z
Hi-z
Audio Serial Data Output Pin
Input/Output Channel Clock Pin
Master Clock Input Pin
Audio Serial Data Clock Pin
Reset & Power Down Pin
13 PDN
I
Hi-z
“L”: Reset & Power down, “H” : Normal operation
Audio Data Format Select Pin
Hi-z
“L”: MSB justified, “H”: I
2
S
14 DIF/TDMI I
TDM Data Input Pin
Hi-z
Digital Filter select Pin
15 FSEL
I
Hi-z
“L”: Sharp Roll-Off, “H”: Short Delay Sharp Roll-Off
Mode Select Pin
16 CKS
I
Hi-z
Parasitic capacitance of the pin should be less than 20pF.
Note: All digital input pins must not be allowed to float.
Note: The GSEL pin must be fixed to “H” or “L” when the PDN pin = “H” to avoid starting the test mode.
■
Handling of Unused Pin
Unused I/O pins must be connected appropriately.
Classification
Analog
RIN, LIN
Pin Name
Setting
This pin should be open.
MS1641-E-02
-4-
2014/12
[AK5720]
5. Absolute Maximum Ratings
(VSS=0V;
Note 1)
Parameter
Power Supplies: Analog
Digital
Input Current, Any Pin Except Supplies
Analog Input Voltage (LIN, RIN pins)
Digital Input Voltage
Ambient Temperature
Storage Temperature
Note 1. All voltages with respect to ground.
Symbol
VA
VD
IIN
VINA
VIND
Ta
Tstg
min
0.3
0.3
-
0.3
0.3
40
65
max
6.0
6.0
10
VA+0.3
VD+0.3
105
150
Unit
V
V
mA
V
V
C
C
WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal
operation is not guaranteed at these extremes. The AK5720 will be damaged if a voltage higher
than 2.5V is input to the REGO pin.
6. Recommended Operating Conditions
(VSS=0V;
Note 1)
Parameter
Power Supplies
Symbol
VA
VD
min
2.7
2.7
typ
3 or 5
3 or 5
max
5.5
VA
Unit
V
V
Analog (VA pin)
Digital (VD pin)
Note 1. All voltages with respect to ground.
WARNING: AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
MS1641-E-02
-5-
2014/12
京公网安备 11010802033920号
EEWORLD
