ak5357 AKM Semiconductor, Inc., ak5357 Datasheet

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ak5357

Manufacturer Part Number
ak5357
Description
24bit 96khz ?? Adc
Manufacturer
AKM Semiconductor, Inc.
Datasheet

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The AK5357 is a stereo A/D Converter with wide sampling rate of 4kHz ∼ 96kHz and is suitable for
multimedia audio system. The AK5357 achieves high accuracy and low cost by using Enhanced dual bit
ΔΣ techniques. The AK5357 requires no external components because the analog inputs are
single-ended. The audio interface has two formats (MSB justified, I
systems like Karaoke, surround.
MS0294-E-02
VCOM
AINR
AINL
CKS2
Stereo ΔΣ ADC
On-Chip Digital Anti-Alias Filtering
Single-ended Input
Digital HPF for DC-Offset cancel
S/(N+D):
DR:
S/N:
Sampling Rate Ranging from 4kHz to 96kHz
Master Clock:
Input level: TTL/CMOS selectable
Master / Slave Mode
Audio Interface: 24bit MSB justified / I
Power Supply: 2.7 ∼ 5.5V
Ta = −40 ∼ 85°C (VT), −20 ∼ 85°C (ET)
Small 16pin TSSOP Package
AK5381 Pin-compatible
Voltage Reference
VA
ΔΣ
Modulator
ΔΣ
Modulator
256fs/384fs/512fs/768fs (4kHz ∼ 48kHz)
256fs/384fs
CKS1
AGND
102dB@5V, 100dB@3V for 48kHz
102dB@5V, 100dB@3V for 48kHz
88dB@5V, 86dB@3V for 48kHz
GENERAL DESCRIPTION
CKS0
VD
DGND
FEATURES
Decimation
Decimation
- 1 -
Filter
Filter
(48kHz ∼ 96kHz)
PDN
2
2
Clock Divider
S) and can correspond to many
S selectable
24Bit 96kHz ΔΣ ADC
Serial I/O
Interface
MCLK
DIF
AK5357
LRCK
SCLK
SDTO
[AK5357]
2007/11

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ak5357 Summary of contents

Page 1

... The AK5357 is a stereo A/D Converter with wide sampling rate of 4kHz ∼ 96kHz and is suitable for multimedia audio system. The AK5357 achieves high accuracy and low cost by using Enhanced dual bit ΔΣ techniques. The AK5357 requires no external components because the analog inputs are single-ended ...

Page 2

... VIH@TTL Level Mode 2.7 to 5.5V@fs=48kHz VA (Analog Supply) 4.5 to 5.5V@fs=96kHz VD (Digital Supply) 4.5 to 5.5V@fs=96kHz Pin #3 Pin #15 Pin #16 MS0294-E-02 −20 ∼ +85°C 16pin TSSOP (0.65mm pitch) −40 ∼ +85°C 16pin TSSOP (0.65mm pitch) Evaluation Board for AK5357 Top View AK5353 AK5381 84dB 96dB ...

Page 3

... Power up, “L”: Power down Audio Interface Format Pin 2 “H” : 24bit I S Compatible, “L” : 24bit MSB justified Mode Select 2 Pin Mode Select 0 Pin Pin Name AINL This pin should be open. AINR This pin should be open Function Setting [AK5357] 2007/11 ...

Page 4

... WARNING: AKM assumes no responsibility for the usage beyond the conditions in this datasheet. MS0294-E-02 ABSOLUTE MAXIMUM RATINGS Symbol VA VD ΔGND (Note 1) IIN VINA VIND AK5357ET Ta AK5357VT Ta Tstg Symbol min VA 2 [AK5357] min max Units −0.3 6.0 V −0.3 6 0.3 V ± −0.3 VA+0.3 V −0.3 VD+0.3 V −20 °C 85 ° ...

Page 5

... Units Bits Vpp Vpp Vpp kΩ kΩ ppm/° μA 2007/11 ...

Page 6

... GD −3dB FR −0.1dB FILTER CHARACTERISTICS (fs=96kHz) Symbol min ±0.1dB PB 0 −0.2dB - −3.0dB - ΔGD (Note 10) GD −3dB FR −0.1dB - 6 - [AK5357] typ max Units 18.9 kHz 20.0 - kHz 23.0 - kHz kHz ±0. μ 1/fs 1.0 Hz 6.5 Hz typ max Units 37.8 kHz 40 ...

Page 7

... VOH (Iout=1mA) VOL Iin Symbol (CKS2-0 pins) VIH VIH (CKS2-0 pins) VIL VIL (Iout=−1mA) VOH (Iout=1mA) VOL Iin - 7 - min typ max 70% 30%VD VD−0 0.5 ± min typ max 70% 2 30% 0.8 VD−0 0.5 ± [AK5357] Units μA Units μA 2007/11 ...

Page 8

... PDN “↑” to SDTO valid at Master Mode Note 11. SCLK rising edge must not occur at the same time as LRCK edge. Note 12. The AK5357 can be reset by bringing the PDN pin = “L”. Note 13. This cycle is the number of LRCK rising edges from the PDN pin = “H”. ...

Page 9

... Timing Diagram MCLK LRCK SCLK LRCK tSHLR SCLK tLRS SDTO MS0294-E-02 1/fCLK tCLKH tCLKL 1/fs tSCK tSCKH tSCKL Clock Timing tLRSH tSSD Audio Interface Timing (Slave mode [AK5357] VIH VIL VIH VIL VIH VIL VIH VIL VIH VIL 50%VD 2007/11 ...

Page 10

... LRCK tMSLR SCLK SDTO PDN SDTO PDN MS0294-E-02 tSSD Audio Interface Timing (Master mode) tPDV tPD Power Down & Reset Timing - 10 - [AK5357] 50%VD dSCK 50%VD 50%VD VIH VIL 50%VD VIL 2007/11 ...

Page 11

... AK5357 may draw excess current due to its use of internal dynamically refreshed logic. If the external clocks are not present, place the AK5357 in power-down mode (PDN pin = “L”). In master mode, the master clock (MCLK) must be provided unless the PDN pin = “L”. ...

Page 12

... Lch Data Figure 1. Mode 0 Timing Lch Data Figure 2. Mode 1 Timing (Table 2). If HPF setting (ON/OFF) is changed when the AK5357 is in operation, click - Rch Data ...

Page 13

... Power down The AK5357 is placed in the power-down mode by bringing the PDN pin “L” and the digital filter is also reset at the same time. This reset should always be executed after power-up. In the power-down mode, the VCOM is the same voltage as AGND. An analog initialization cycle starts after exiting the power-down mode. Therefore, the output data SDTO becomes available after 4129 cycles of LRCK clock in master mode or 4132 cycles of LRCK clock in slave mode. During initialization, the ADC digital output data of both channels are forced to a 2’ ...

Page 14

... Analog 5V 10u 0.1u + 10u 0.1u Note: - AGND and DGND of the AK5357 should be distributed separately from the ground of external digital devices (MPU, DSP etc.). - All digital input pins should not be left floating. - The CKS1 pin should be connected AGND. Digital Ground System Controller Note: - AGND and DGND must be connected to the same analog ground plane ...

Page 15

... The input signal range scales with the supply voltage and nominally 0.6xVA Vpp (typ). The ADC output data format is 2’s complement. The DC offset is removed by the internal HPF. The AK5357 samples the analog inputs at 64fs. The digital filter rejects noise above the stop band except for multiples of 64fs. The AK5357 includes an anti-aliasing filter (RC filter) to attenuate a noise around 64fs. ...

Page 16

... M Seating Plane NOTE: Dimension "*" does not include mold flash. ■ Material & Lead finish Package molding compound: Lead frame material: Lead frame surface treatment: MS0294-E-02 PACKAGE 9 8 0.65 Detail A 0.10 Epoxy Cu Solder (Pb free) plate - 16 - [AK5357] 1.05 ± 0.05 A 0.17 ± 0.05 0.1 ± 0.1 0-10 ° 2007/11 ...

Page 17

... MS0294-E-02 MARKING (AK5357VT) AKM 5357VT XXYYY Pin #1 indication 1) Date Code: XXYYY (5 digits) 2) XX: Lot# YYY: Date Code Marketing Code: 5357VT [AK5357] 2007/11 ...

Page 18

... MS0294-E-02 MARKING (AK5357ET) AKM 5357ET XXYYY Pin #1 indication 4) Date Code : XXYYY (5 digits) 5) XX: Lot# YYY: Date Code Marketing Code : 5357ET [AK5357] 2007/11 ...

Page 19

... Spec Addition P.2 Ordering Guide AK5357ET was added. P.18 MARKING AK5357ET was added. Spec Change P5 ANALOG CHARACTERISTICS of AK5357VT Input Voltage VA=5V; fs=48kHz 2.7V(min) →2.85V(min) 3.3V(max) → 3.15V(max) IMPORTANT NOTICE , and AKEMD assumes no responsibility for such use, except for the use Note2 [AK5357] in any safety, life support, or ...

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