Specifications

Product Technical Specification & Customer Design Guidelines
58 Proprietary and Confidential - Specifications subject to change 2400058
4.10.3.2 SPK speaker output
SPK can have either a single-ended or a differential connection.
Figure 4-8: SPK equivalent circuit
Tabl e 4- 2 6 describes the speaker’s electrical characteristics.
AirPrime SL module
SPK
+
SPK_N
SPK_P
1
1
Table 4-26: SPK electrical characteristics
Parameter Minimum Typical Maximum Unit
Biasing
voltage
SPK_P and SPK_N 1.30 V
Output swing
voltage
RL=8 : AT+VGR=-1000
a
; single ended - - 2 Vpp
RL=8 : AT+VGR=-1000
a
; differential - - 4 Vpp
RL=32 : AT+VGR=-1000
a
; single ended - - 2.5 Vpp
RL=32 : AT+VGR=-1000
a
; differential - - 5 Vpp
RL Load resistance 6 8 -

IOUT Output current; peak value; RL=8  - - 180 mA
POUT RL=8 ; AT+VGR=-1000
a
- - 250 mW
RPD Output pull-down resistance at power-down 28 40 52 k
VPD Output DC voltage at power-down - - 100 mV
a. Output voltage depends on the output speaker gain set by AT command. This value is given in dB, but it’s possible to
toggle it to index value. Refer to [3] AirPrime MC8xxx Embedded Modules Extended AT Command Reference.