Digital Audio Denmark DAD CARD M8 8 channel Pristine AD Mic/Line Card

The CARD-M8 is a Pristine Mic/Line input and AD converter Card that provides combined analogue line level and microphone input for the DAD modular audio interfaces. All inputs are balanced and have pristine audio performance with transparent and non-colouring AD conversion. Each channel can be set to operate in either line level or microphone level mode.

The AD conversion is based on a dual 5-bit delta sigma modulator converter chip with filtering done in a dedicated FPGA with 32bit processing for the PCM formats and supports all sample rates from 44.1 to 384kHz, including DXD and one-bit DSD 64 and DSD 128. The gain staging for the microphone and line gain is done via relays with no electronic gain components, providing ultimate noise and linearity performance.

• 8 input channel pristine AD converter
• Microphone or Line level mode setting for each channel
• Dynamic Range (A): >123dB
• THD+N (A): < –117 dB @ –3 dB FS / 0.00014%
• 32bit processing
• Sample rates: 44.1 to DXD and 384kHz
• DSD formats: 64FS, 128FS
• Sample Resolution: 5-bit sigma/delta @ 5.645 or 6.144MHz, 24-bit PCM
• Compatible with, Penta 720, Penta 721s, AX32, AX64, AX Center

General:
• Interface: DB25 female
(Tascam pinout)

• Sample Rate (PCM):
44.1, 48, 88.2, 96, 176.4, 192,
352.8, 384kHz

• Sample Rate (DSD):
2.8224 & 5.6448MHz
(64 & 128 fs)

• Frequency response:
10 Hz – 20 kHz +/-0.1dB at
all gain settings

• Gain accuracy: +/-0.1dB all gain settings

• Power Consumption: 11 Watt max

Line input mode:
• Max input level: From -9dBu to 30dBu in steps of 0.1dB

• Gain setting for
0dBFS: Relay based 3dB gain steps:
9dBu, 12dBu, 15dBu, 18dBu,
21dBu, 24dBu, 27dBu, 30dBu
w. digital inter-step adjustment

• Input Impedance: > 10k Ohms

• CMRR: > 120dB@1kHz

Microphone mode:
• Phantom Power: 48V
• Input Impedance: 3k Ohms
• EIN (A): -131dB, @0 Ohm source

• Max input level:
+21 dBu@ -3dB signal gain
(-18dB DADman gain setting)

• Microphone gain: -3dB to 45dB analog gain with relay based 3dB analogue gains steps and additional digital gain up to + 39dB

• Gain range: -18 to 72 dB