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AKD4634 Datasheet(PDF) 9 Page - Asahi Kasei Microsystems |
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AKD4634 Datasheet(HTML) 9 Page - Asahi Kasei Microsystems |
9 / 77 page [AK4634] Rev. 0.5 2007/10 - 9 - FILTER CHRACTERISTICS (Ta = −30 ∼ 85°C; AVDD = 2.2 ∼ 3.6V; DVDD = 1.6 ∼ 3.6V, SVDD = 2.2 ∼ 4.0V; fs=8kHz) Parameter Symbol min typ max Units ADC Digital Filter (Decimation LPF): Passband (Note 19) ±0.16dB −0.66dB −1.1dB −6.9dB PB 0 - - - - 3.5 3.6 4.0 3.0 - - - kHz kHz kHz kHz Stopband (Note 19) SB 4.7 - - kHz Passband Ripple PR - - ±0.1 dB Stopband Attenuation SA 73 - - dB Group Delay (Note 20) GD - 16 - 1/fs Group Delay Distortion ΔGD - 0 - μs DAC Digital Filter (Decimation LPF): Passband (Note 19) ±0.16dB −0.54dB −1.0dB −6.7dB PB 0 - - - - 3.5 3.6 4.0 3.0 - - - dB Stopband (Note 19) SB 4.7 - - kHz Passband Ripple PR - - ±0.1 dB Stopband Attenuation SA 73 - - dB Group Delay (Note 20) GD - 16 - 1/fs Group Delay Distortion ΔGD - 0 - μs DAC Digital Filter + Analog Filter: Frequency Response: 0 ∼ 3.4kHz FR - ±1.0 - dB Note 19. The passband and stopband frequencies are proportional to fs (system sampling rate). For example, ADC of PB = 3.6kHz is 0.45*fs (@ −1.0dB). A reference of frequency response is 1kHz. Note 20. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the 16-bit data of a channel from the input register to the output register of the ADC. For the DAC, this time is from setting the 16-bit data of a channel from the input register to the output of analog signal. When there is not a phase change with the IIR filter, the group delay of the programmable filter (primary HPF + primary LPF + 5-band Equalizer + ALC) increases for 2/fs than a value of an above mention. DC CHRACTERISTICS (Ta = −30 ~ 85°C; AVDD = 2.2 ∼ 3.6V, DVDD = 1.6 ∼ 3.6V, SVDD = 2.2 ∼ 4.0V) Parameter Symbol min typ max Units High-Level Input Voltage (DVDD ≥ 2.2V) (DVDD < 2.2V) Low-Level Input Voltage (DVDD ≥ 2.2V) (DVDD < 2.2V) VIH VIL 70%DVDD 80%DVDD - - - - - - - - 30%DVDD 20%DVDD V V V V High-Level Output Voltage (Iout = −80μA) Low-Level Output Voltage (Except SDA pin: Iout = 80 μA) (SDA pin, 2.0V ≤ DVDD ≤ 3.6V: Iout = 3mA) (SDA pin, 1.6V ≤ DVDD < 2.0V: Iout = 3mA) VOH VOL1 VOL2 VOL2 DVDD −0.2 - - - - - - - - 0.2 0.4 20%DVDD V V V Input Leakage Current Iin - - ±10 μA |
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