max9791 Maxim Integrated Products, Inc., max9791 Datasheet - Page 6

• Manufacturer Part Number: max9791
• Description: Windows Vista-compliant Class D Speaker Amplifiers With Directdrive Headphone Amplifiers
• Manufacturer: Maxim Integrated Products, Inc.

Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V
wise specified. R
unless otherwise noted. Typical values are at T
Note 3: All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
Note 4: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R
Note 5: Specified at T
Note 6: Amplifier Inputs AC-coupled to GND.
Note 7: Guaranteed by ATE characterization; limits are not production tested.
(V
erwise specified. R
= 20kHz AES17, T
HP_EN = 1.)
6
AVDD
0.001
AVDD
-100
0.01
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
vs. OUTPUT POWER (MAX9792 SPEAKER MODE)
0.1
10
_______________________________________________________________________________________
0
1
vs. FREQUENCY (MAX9792 SPEAKER MODE)
0.01
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
0
= V
= V
For R
with a 32Ω resistive load connected between HPR, HPL and GND for headphone amplifier. Speaker and headphone mode
transitions are controlled by SPKR_EN and HP_EN inputs, respectively.
R
V
R
L
IN
L
0.5
= 3Ω
= 3Ω
= -3dBFS
PVDD
PVDD
FS = 1V
L
f = 6kHz
0.1
1.0
= 4Ω, L = 33µH. For R
FS = 707mV
OUTPUT POWER (W)
IN1
RMS
= V
= V
FREQUENCY (kHz)
f = 100Hz
A
1.5
IN1
= +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
= 20kΩ (A
HPVDD
f = 1kHz
HPVDD
A
= 20kΩ (A
2.0
1
= +25°C with an 8Ω + 68µH load connected across BTL output for speaker amplifier. Specified at T
RMS
2.5
= 5V, V
= 5V, V
3.0
VSPKR
10
VSPKR
3.5
GND
GND
= 12dB), R
L
100
4.0
= 8Ω, L = 68µH.
= 12dB), R
= V
= V
PGND
PGND
A
0.001
-100
0.01
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
vs. OUTPUT POWER (MAX9791 SPEAKER MODE)
= +25°C.) (Note 3)
0.1
IN2
10
= V
0
1
vs. FREQUENCY (MAX9791 SPEAKER MODE)
= V
IN2
0.01
0
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
= 40.2kΩ (A
CPGND
R
V
R
CPGND
= 40.2kΩ (A
L
IN
L
= 4Ω
= 4Ω
f = 1kHz
= -3dBFS
f = 100Hz
0.5
SPEAKER
0.1
FS = 707mV
= 0, I
= 0, I
OUTPUT POWER (W)
1.0
FREQUENCY (kHz)
VHP
LDO_OUT
f = 6kHz
FS = 1V
VHP
LDO_OUT
1.5
RMS
1
= 0dB), C
= 0dB), C
Typical Operating Characteristics
RMS
2.0
= 0, C
10
= 0, C
2.5
IN1
IN1
LDO
= 470nF, C
LDO
100
= 470nF, C
3.0
= 2 x 1µF, C1 = C2 = 1µF. R
= 2µF, C1 = C2 = 1µF. R
0.001
-100
0.01
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
vs. OUTPUT POWER (MAX9791 SPEAKER MODE)
0.1
10
IN2
0
1
vs. FREQUENCY (MAX9791 SPEAKER MODE)
IN2
0.01
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
0
= C
R
V
R
= C
f = 1kHz
L
IN
L
= 8Ω
= 8Ω
= -3dBFS
COM
f = 100Hz
COM
0.1
0.5
OUTPUT POWER (W)
= 1µF, T
FS = 707mV
f = 6kHz
FREQUENCY (kHz)
= 1µF, measurement BW
FS = 1V
1.0
1
L
L
L
RMS
= ∞, unless other-
A
RMS
= 3Ω, L = 22µH.
= ∞, unless oth-
= T
MIN
1.5
10
A
= +25°C
to T
MAX
100
2.0
,