Power consumption, Figure 9.power consumption test configuration, Cs42l73 power consumption – Cirrus Logic CS42L73 User Manual
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DS882F1
CS42L73
POWER CONSUMPTION
Test conditions (unless otherwise specified): Connections to the CS42L73 are shown in the
“Typical Connection Diagram” on
; GND = AGND = PGND = CPGND = DGND = 0 V; all voltages are with respect to ground (GND); VA = VCP = VL =
1.80 V, VP = 3.70 V; T
A
= +25
C; RESET pin inactive; f
MCLK1
= 6.144 MHz, MCLK2 is held low; Internal MCLK enabled and
derived from MCLK1 input (/1) (thus, Fs = 48 kHz); f
DMIC_SCLK
= 1.536 MHz (/4); silence on analog inputs, microphones are not
attached; SCL inactive, SDA held high; XSP and ASP are in I²S slave mode, VSP is in PCM mode, Fs
ext
(XSP and ASP)
=
48 kHz, Fs
ext
(VSP)
= 8 kHz; XSP, ASP, and VSP clocks are held low unless port is in use; XSP, ASP, VSP and DMIC data
inputs are held low (all zeros data), XSP, ASP, and VSP data output lines are not driven by other devices in system; no load on
analog outputs except for HP Zobel; PDN, PDN_ADCx, PDN_BIASx, PDN_DMICx, PDN_XSPSDOUT, PDN_XSPSDIN, PDN_
ASPSDOUT, PDN_ASPSDIN, PDN_VSP, PDN_HP, PDN_EAR, PDN_LO, PDN_SPK, PDN_SPKLO, PDN_THMS = 1b; all
other register controls as per defaults;
describes the current-measuring method.
Notes:
48. In accordance with the JEITA CP-2905B standard, 0.1 mW per channel is delivered to headphone loads via a 1 kHz
sine wave. The popular 32
headphone loading is used.
Case/Configuration
Class
H
Mode
Typical Current (
A)
Total
Power
(
W)
i
VA
i
VP
i
VCP
i
VL
1 Reset
RESET and MCLK1 held low, PDN* = x, MCLKDIS = x
-
1
2
1
4
18
2 Standby (PDN = 1b)
MCLK1 held low, MCLK from MCLK1, MCLKDIS = 1b
-
1
4
1
7
31
3 Stereo Play to HP: ASP to HP
PDN_ASPSDIN, PDN_HP = 0b
VCP/3 611
4
468 1029
3809
VCP/2
611
4
556 1029
3968
VCP
611
4
913 1029
4610
4
Stereo Play to HP - 32
: ASP to HP
PDN_ASPSDIN, PDN_HP = 0b
VCP/3
611
4
1598 1338
6399
VCP/2 611
4
2238 1338
7551
VCP
611
4
4255 1338
11182
5
Handset Voice Call (Digital Mic): DMICA to VSP, Mono VSP to EAR
PDN_DMICA, PDN_VSP, PDN_EAR = 0b
-
1233
4
1
1232
4454
6
Handset Voice Call (Analog Mic): MIC1 to VSP, Mono VSP to EAR
PDN_BIAS1, PDN_ADCA, PDN_VSP, PDN_EAR = 0b
-
2377 107
1
1160
6764
7
Headset Voice Call: MIC2 to VSP, Mono VSP to Stereo HP
PDN_BIAS2, PDN_ADCB, PDN_VSP, PDN_HP = 0b
VCP/3 1794 112 475 1280
6803
8
Headset Voice Call - 32
: MIC2 to VSP, Mono VSP to Stereo HP
PDN_BIAS2, PDN_ADCB, PDN_VSP, PDN_HP = 0b
VCP/3 1794 112 1598 1329
8912
Note:
The current draw on each CS42L73 power supply
pin, except VP, is derived from the measured volt-
age drop across a 10-
series resistor between
the associated supply source and each voltage
supply pin. Given the larger currents that are pos-
sible on the VP supply, an ammeter is used on
that rail.
Voltmeter
-
+
-
+
-
+
Power Supply
Ammeter
VA
AGND/CPGND/
DGND/PGND
VCP
0.1 µF
2.2 µF
VP
4.7 µF
0.1 µF
VL
CS42L73
0.1 µF
DAC
+
-
10
DAC
+
-
10
DAC
+
-
10
Figure 9. Power Consumption Test Configuration