BM83 datasheet(57/74 Pages) MICROCHIP

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Parameter (Condition)

Min.

Typ.

Max.

Unit

Analog gain resolution

—

2.0

—

Input full-scale at maximum gain (differential)

—

mV/rms

Input full-scale at minimum gain (differential)

—

800

—

mV/rms

3 dB bandwidth

—

kHz

Microphone mode (input impedance)

—

kΩ

THD+N ratio(3)

—

0.04

—

THD+N ratio(3)

—

-68

—

These parameters are characterized, but not tested on production device.

T = 25°C, VDD = 1.8V, 1 kHz sine wave input, bandwidth = 20 Hz to 20 kHz.

fin = 1kHz sine tone, analog gain = -3 dB, digital gain = 0 dB, bandwidth = 22K, A-weighted, sweep across

-100 dBv to 6 dBv.

Measurements performed on BM83 EVB platform.

Table 9-7. Audio Codec Digital-to-Analog Converter(1,5)

Parameter (Condition)

Min.

Typ.

Max.

Unit

Over-sampling rate

—

128

—

Resolution

—

Bit

Output sample rate

—

kHz

SNR ratio(2)(at Capless mode) for 48 kHz

—

SNR(2)(at Single-ended mode) for 48 kHz

—

Digital gain

-54

—

4.85

Digital gain resolution

—

2 to 6

—

Analog gain

-28

—

Analog gain resolution

—

Output voltage full-scale swing (AVDD = 1.8V)

495

742.5

—

mV/rms

Maximum output power (16Ω load)

—

34.5

—

Maximum output power (32Ω load)

—

17.2

—

Allowed load

Resistive

—

Ω

Capacitive

—

500

THD Ratio (3)

0.15

0.02

0.05

THD Ratio (3)

-75

-70

-65

THD+N Ratio (3)

0.03

0.04

0.05

THD+N Ratio (3)

-72

-70

-65

SNR ratio (at 16Ω load) (4)

—

These parameters are characterized, but not tested on production device.

T = 25°C, VDD = 1.8V, 1 kHz sine wave input, bandwidth = 20 Hz to 20 kHz.

BM83

Electrical Characteristics

Preliminary Datasheet

DS70005402A-page 57

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