SX1441EVK Semtech, SX1441EVK Datasheet - Page 67

• Manufacturer Part Number: SX1441EVK
• Description: KIT DEV FOR SX1441
• Manufacturer: Semtech
• Series: EasyBlue™r
• Type: Bluetoothr

Specifications of SX1441EVK

• For Use With/related Products: SX1441
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Contents: -
• Other names: SX1441DVK; SX1441DVK

Personal Area Network
not, the read or write pointer will increment beyond the stop addresses which means audio samples will be read
from the application data memory, or audio samples will overwrite application data in the memory.
Note that odd settings may lead to unpredictable behavior: a) if the RegDmaWrStartAddr is higher then the
RegDmaWrStopAddr then the internal pointer counter will increment until it reaches the 0xFFFF address, then
restarts at 0x0000 and increments until it reaches the RegDmaWrStopAddr; b) the behavior is similar for the
RegDmaRdStartAddr and RegDmaRdStopAddr; c) if RegDmaWrStartAddr = RegDmaWrStopAddr, and/or
RegDmaRdStartAddr = RegDmaRdStopAddr, then the interrupt is immediately generated.
3.14.4 CODEC Clock Source
As shown in paragraph 3.5.9, the codec is clocked by SYS_CLOCK_IN. Its frequency must be 13 MHz in order to
fulfill the Bluetooth Audio specifications.
3.14.5 Specifications
Note 1 : Values below are specified at 25degC and for VDD_M > 2.2V unless otherwise specified
Note2 : Values marked with asterisks are not production tested and guaranteed by design.
© Semtech 2006
Z
Z
Z
Noise (x10)
Noise (x20)
ADC Noise
Gain error
Noise (x5)
Preamplifier
Preamplifier
Preamplifier
Preamplifier
Preamp
Preamp
Preamp
DR
DR
Symbol
PWM
x10
x20
x5
F
SNR
THD
V
gain
ADC
DAC
H
MIC
@ gain
@ gain
@ gain
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(*)
preamplifier @ gain = x10
preamplifier @ gain = x20
preamplifier @ gain = x5
Total harmonic distortion
input noise level of the
input noise level of the
input noise level of the
equivalent input noise
Dynamic Range ADC
Signal-to-Noise Ratio
Dynamic range DAC
(relative to full scale)
impedance of the
impedance of the
impedance of the
Preamplifier high
PWM output rate
frequency roll-off
Equivalent input
Equivalent input
Equivalent input
level of the ADC
Description
preamplifier
preamplifier
preamplifier
input range
Table 128 – Codec Specifications
Min
-0.5
10
0
5
-
-
-
-
-
-
-
-
-
-
-
-
-
67
Typ
256
0.8
4.3
1.8
1.5
-78
18
20
10
13
86
84
72
5
-
Max
1.5
1.0
0.5
-65
20
25
40
-
-
-
-
-
-
-
-
-
-
μV
μV
μV
μV
Unit
kHz
kHz
V
dB
kΩ
kΩ
kΩ
dB
dB
dB
dB
V
pp
rms
rms
rms
rms
p
SX1441 – Bluetooth® 1.2 SoC
Min/max levels on
VMIC_P and VMIC_N
Differential input
│VMIC_P – VMIC_N│
x5, x10, x20, under
software control
@ gain = x20
50 Hz to 4 kHz bandwidth
50 Hz to 4 kHz bandwidth
50 Hz to 4 kHz bandwidth
gain = x5
gain = x10
gain = x20
-
-
@ 1kHz, 32Ω load, with
ADC and DAC in direct
loopback mode, gainx5
with ADC and DAC in
direct loopback mode gain
x5 in 4kHz bandwidth
Comments
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Data Sheet