User Manual

BM62/64
Preliminary
DS60001403C-Page 50
2017 Microchip Technology Inc.
TABLE 8-6: AUDIO CODEC DIGITAL TO ANALOG CONVERTER
T = 25
o
C, VDD = 2.8V, 1 kHz sine wave input, Bandwidth = 20 Hz to 20 kHz
Parameter (Condition)
Min.
Typical
Max.
Unit
Over-sampling rate
128
f
s
Resolution
16
20
Bit
Output Sample Rate
8
48
kHz
Signal to Noise Ratio (Note 1)
(SNR at capless mode) for 48 kHz
98
dB
Signal to Noise Ratio (Note 1)
(SNR at single-ended mode) for 48 kHz
98
dB
Digital Gain
-54
4.85
dB
Digital Gain Resolution
2 to 6
dB
Analog Gain
-28
3
dB
Analog Gain Resolution
1
dB
Output Voltage Full-scale Swing (AVDD = 2.8V)
495
742.5
mV/rms
Maximum Output Power (16 Ohm load)
34.5
mW
Maximum Output Power (32 Ohm load)
17.2
mW
Allowed Load
Resistive
16
O.C.
Ohm
Capacitive
500
pF
THD+N (16 Ohm load) (Note 2)
0.05
%
Signal to Noise Ratio (SNR at 16 Ohm load) (Note 3)
98
dB
Note 1: fin = 1 kHz, B/W = 20 Hz to 20 kHz, A-weighted, THD+N < 0.01%, 0 dBFS signal, Load = 100 kOhm
2: fin = 1 kHz, B/W = 20 Hz to 20 kHz, A-weighted, -1 dBFS signal, Load =16 Ohm
3: fin = 1 kHz, B/W = 20 Hz to 20 kHz, A-weighted, THD+N < 0.05%, 0 dBFS signal, Load = 16 Ohm
4: These parameters are characterized, but not tested in manufacturing.
TABLE 8-7: TRANSMITTER SECTION FOR BDR AND EDR
Parameter
Min.
Typical
Max.
Bluetooth
specification
Unit
RF transmit power
Class 1
15.0
(3)
< 20
dBm
Class 2
2
(3)
-6 to 4
dBm
EDR/BDR Relative transmit power
-4
-1.8
1
-4 to 1
dB
Note 1: The RF Tx power is modulation value.
2: The RF Transmit power is calibrated during the production by using the MP tool software and MT8852 Blue-
tooth Test equipment.
3: Test condition: VCC_RF = 1.28V, temperature +25ºC.