I wanted to know if the ADAU1977 is capable of accepting the balanced ac coupled signal from a pre-phantom power condenser microphone. E.g Newman KMS 104 BK?
The KMS 104 BK is as follows:
Acoustical operating principle: Pressure gradient transducer
Directional pattern: Cardioid/cardioid/supercardioid
Frequency range: 20 Hz ... 20 kHz
Sensitivity at 1 kHz into 1 kohm: 4.5 mV/Pa
Rated impedance: 50 ohms
Rated load impedance: 1 kohms
Equivalent noise level, CCIR1): 28 dB
Equivalent noise level, A-weighted1): 18 dB-A
Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL): 66 dB
Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL): 76 dB
Maximum SPL for THD 0.5%2): 150 dB
Maximum output voltage: 12 dBu
Supply voltage (P48, IEC 1938): 48 V ± 4 V
Current consumption (P48, IEC 1938): 3.5 mA
Matching connector: XLR3F
Weight: approx. 300 g
Diameter: 48 mm
Length: 180 mm
The ADAU1977 does not have to provide the MICBIAS as the microphone will be pre-biased with an external 48V phantom power unit.
See block diagram attached.