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AK5351 Dataheets PDF



Part Number AK5351
Manufacturers Asahi Kasei Microsystems
Logo Asahi Kasei Microsystems
Description Enhanced Dual bit 20bit ADC
Datasheet AK5351 DatasheetAK5351 Datasheet (PDF)

ASAHI KASEI [AK5351] AK5351 Enhanced Dual bit ∆Σ 20bit ADC GENERAL DESCRIPTION The AK5351 is a 20-bit, 64x oversampling rate(64fs), 2-channel A/D converter for stereo digital systems. The ∆Σ modulator in the AK5351 uses the new developed Enhanced Dual bit architecture. This new architecture achieves the wider dynamic range, while keeping much the same superior distortion characteristics as the conventional Single bit way. The AK5351 is suitable for digital surround and Hi-Fi audio application .

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ASAHI KASEI [AK5351] AK5351 Enhanced Dual bit ∆Σ 20bit ADC GENERAL DESCRIPTION The AK5351 is a 20-bit, 64x oversampling rate(64fs), 2-channel A/D converter for stereo digital systems. The ∆Σ modulator in the AK5351 uses the new developed Enhanced Dual bit architecture. This new architecture achieves the wider dynamic range, while keeping much the same superior distortion characteristics as the conventional Single bit way. The AK5351 is suitable for digital surround and Hi-Fi audio application such as Car-audio, MD, etc. Analog inputs of the AK5351 are normally Full-differential inputs, while they are also acceptable Single-ended inputs. The AK5351 is available in a small 24pin VSOP package which will reduce your system space. FEATURES † Full-differential / Single-ended inputs † S/(N+D): 97dB † DR, S/N: 103dB † Linear phase digital filter Pass band: 0~22kHz(@fs=48kHz) Pass band ripple: ±0.005dB Stop band attenuation: 80dB † Digital HPF for DC-offset cancel † Master clock: 256fs/384fs † Power supply: 5V±10% † Small package: 24pinVSOP 0166-E-00 -1- 1997/4 ASAHI KASEI „ Ordering Guide AK5351-VF AKD5351/2 „ Pin Layout -40~85°C Evaluation Board 24pin VSOP [AK5351] „ Replacement from AK5350 to AK5351 Package Analog Inputs Voltage fc of HPF(@fs=48kHz) SCLK AK5350 28VSOP ±3.47Vp-p 7Hz ~64fs AK5351 24VSOP *)Interchangeable with AK5350 ±2.10Vp-p *)Acceptable Single-ended 1Hz ~128fs 0166-E-00 -2- 1997/4 ASAHI KASEI [AK5351] PIN/FUNCTION No. 1 2 3 Pin Name AINR+ AINRVREF I/O I I O FUNCTION Right channel analog positive input pin Right channel analog negative input pin Voltage Reference output pin (VA-2.6V) Normally connected to VA with a 0.1uF ceramic capacitor in parallel with a 10uF electrolytic capacitor. Analog section Analog Power Supply, +5V Analog section Analog Ground Left channel analog positive input pin Left channel analog negative input pin Test pin (Pull-down pin) Should be left floating. 4 5 6 7 8 10 11 14 9 VA AGND AINL+ AINLTST1 TST2 TST3 TST4 HPFE I I I 12 13 16 VD DGND PD I 17 MCLK I 18 SCLK I/O 19 LRCK I/O 20 FSYNC I/O High Pass Filter Enable pin (Pull-up pin) "H": ON "L": OFF Digital section Digital Power Supply pin, +5V Digital section Digital Ground pin Power Down pin "L" brings the device into power-down mode. Must be done once after power-on. Master Clock input pin CMODE="H":384fs CMODE="L":256fs Serial Data Clock pin Data is clocked out at the falling edge of SCLK. Slave mode: 64fs clock is input usually. Master mode: SCLK outputs a 64fs clock. SCLK stays low during the power-down mode(PD="L"). L/R Channel Clock Select pin Slave mode: An fs clock is fed to this LRCK pin. Master mode: LRCK output an fs clock. LRCK goes "H" at SMODE2="L" and "L" at SMODE2="H" during reset when SMODE1 "H". Frame Synchronization Signal pin Slave mode: When "H", data bits are clocked out on SDATA. 2 As I S slave mode ignores FSYNC, it should hold "L" or "H". Master mode: FSYNC outputs 2fs clock. Stay low during the power-down mode(PD="L"). 0166-E-00 -3- 1997/4 ASAHI KASEI [AK5351] 21 SDATA O 22 CMODE I 23 15 SMODE1 SMODE2 I I 24 VB - Serial Data Output pin Data are output with MSB first, in 2's complement format. After 20 bits are output it turns to "L". It also remains "L" at a power-down mode(PD="L"). Master Clock Selection pin "L": MCLK=256fs "H": MCLK=384fs Serial Interface Mode Select pin Defines the directions of LRCK, SCLK and FSYNC pins and Output Data Format. SMODE2 is pull-down pin. SMODE1 SMODE2 MODE LRCK L L Slave mode: MSB justified : H/L 2 : H/L H L Master mode: Similar to I S 2 L H Slave mode: I S : L/H 2 : L/H H H Master mode: I S Substrate Power Supply, +5V 0166-E-00 -4- 1997/4 ASAHI KASEI [AK5351] ABSOLUTE MAXIMUM RATINGS (AGND,DGND=0V; Note 1 ) Parameter DC Power Supply:Analog Power(VA pin) Digital Power(VD pin) (Note 2 ) Substrate Power(VB pin) Input Current (Any pin except supplies) Analog Input Voltage AINL+,AINL-,AINR+,AINR-pins (Note 2 ) Digital Input Voltage (Note 2 ) Ambient Temperature Storage Temperature Symbol VA VD VB IIN VINA VIND Ta Tstg min -0.3 -0.3 -0.3 -0.3 -0.3 -40 -65 max 6.0 6.0/VB+0.3 6.0 ±10 6.0/VA+0.3 6.0/VB+0.3 85 150 Units V V mA V V °C °C Note 1 : All voltage with respect to ground. Note 2 : Absolute maximum value is the highest voltage in 6.0V, VA+0.3V and VB+0.3V. WARNING: Operation beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. RECOMMENDED OPERATING CONDITIONS (AGND,DGND=0V; Note 1 ) Parameter DC Power Supplies: Analog Power Digital Power(VD pin) (VB pin) (Note 3 ) Symbol VA VD VB min 4.50 4.50 4.50 typ 5.0 5.0 5.0 max 5.50 VB 5.50 Units V V V Note 1 : All voltages with respect to ground. Note 3 : The VA and VB are connected together through the chip substrate and have several ohms resistance. The VA and VB should be powered at the same time or earlier than VD. * AKM assumes no responsibility for the usage beyond the conditions in this .


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