Datenblatt-Suchmaschine für elektronische Bauteile |
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CS4399 Datenblatt(PDF) 11 Page - Cirrus Logic |
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CS4399 Datenblatt(HTML) 11 Page - Cirrus Logic |
11 / 111 page DS1113F1 11 CS4399 3 Characteristics and Specifications 3 Characteristics and Specifications Table 3-1 defines parameters as they are characterized in this section. Table 3-1. Parameter Definitions Parameter Definition Dynamic range The ratio of the rms value of the signal to the rms sum of all other spectral components over the specified bandwidth. A signal-to-noise ratio measurement over the specified bandwidth made with a –60-dB signal; 60 dB is added to resulting measurement to refer the measurement to full scale. This technique ensures that distortion components are below the noise level and do not affect the measurement. This measurement technique has been accepted by the Audio Engineering Society, AES17–1991, and the Electronic Industries Association of Japan, EIAJ CP–307. Dynamic range is expressed in decibel units. Gain drift The change in gain value with temperature, expressed in ppm/°C units. Idle channel noise The rms value of the signal with no input applied (properly back-terminated analog input, digital zero, or zero modulation input). Measured over the specified bandwidth. Interchannel gain mismatch The gain difference between left and right channel pairs. Interchannel gain mismatch is expressed in decibel units. Interchannel phase mismatch The phase difference between left and right channel pairs at 997-Hz sine wave input. Interchannel phase mismatch is ex- pressed in degree units (with respect to 997-Hz sine wave input). Interchannel isolation A measure of cross talk between the left and right channel pairs. Interchannel isolation is measured for each channel at the converter's output with no signal to the input under test and a full-scale signal applied to the other channel. Interchannel isolation is expressed in decibel units. Load resistance and capacitance The recommended minimum resistance and maximum capacitance required for the internal op-amp's stability and signal integrity. The load capacitance effectively moves the band-limiting pole of the amp in the output stage. Increasing load ca- pacitance beyond the recommended value can cause the internal op-amp to become unstable. Output offset voltage The DC offset voltage present at the amplifier’s output when its input signal is in a mute state. The offset exists due to CMOS process limitations and is proportional to analog volume settings. When measuring the offset out of the headphone amplifier, the headphone amplifier is ON. Total harmonic distortion + noise (THD+N) The ratio of the rms sum of distortion and noise spectral components across the specified bandwidth (typically 20 Hz–20 kHz) relative to the rms value of the signal. THD+N is measured at –1 and –20 dBFS for the analog input and at 0 and –20 dB for the analog output, as suggested in AES17–1991 Annex A. THD+N is expressed in decibel units. Turn-on time Turn-on time is measured from when the PDN_HP = 0 ACK signal is received to when the signal appears on the HP output. Table 3-2. Recommended Operating Conditions GNDD = GNDA = 0 V, all voltages with respect to ground. Parameters 1 1.Device functional operation is guaranteed within these limits. Functionality is not guaranteed or implied outside of these limits. Operation outside of these limits may adversely affect device reliability. Symbol Minimum Maximum Units DC power supply Analog VA 1.66 1.94 V Charge pump VCP 1.66 1.94 V Filtered charge pump EXT_VCPFLT = 1 VCP_FILT+ 2.85 3.15 V VCP_FILT– –3.15 –2.85 V Battery supply HV_EN = 0, EXT_VCPFILT = 0 HV_EN = 1, EXT_VCPFILT = 0 EXT_VCPFILT = 1 VP 3.0 3.3 3.3 5.25 5.25 5.25 V V V Digital Interface VL 1.66 1.94 V Digital Internal VD 1.66 1.94 V External voltage applied to pin2,3 2.The maximum over/undervoltage is limited by the input current. 3.Table 1-1 lists the power supply domain in which each CS4399 pin resides. HP_DETECT pin VCP_FILT± domain pins 4 VL domain pins VA domain pins VP domain pins 4.VCP_FILT± is specified in Table 3-13. VINHI VVCPF VVL VVA VVP –0.3 – VCP_FILT– –0.3 – VCP_FILT– –0.3 –0.3 –0.3 VP + 0.3 0.3 + VCP_FILT+ VL + 0.3 VA + 0.3 VP + 0.3 V V V V V Ambient temperature TA –10 +70 C |
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