MAX9770ETI+ Maxim Integrated Products, MAX9770ETI+ Datasheet - Page 4

• Manufacturer Part Number: MAX9770ETI+
• Description: IC AMP AUDIO 1.2W MONO D 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: Class Dr

Specifications of MAX9770ETI+

• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 1.2W x 1 @ 8 Ohm; 80mW x 2 @ 16 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: Depop, Input Multiplexer, Mute, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.2W, Low-EMI, Filterless, Mono Class D Amplifier
with Stereo DirectDrive Headphone Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V
speaker load connected between OUT+ and OUT-, headphone load connected between HPOUT_ and GND, T
unless otherwise noted. Typical values are at T
4
Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2: Speaker amplifier testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For
Note 3: Guaranteed by design, not production tested.
Note 4: Inputs AC-coupled to GND.
Note 5: Speaker mode testing performed with an 8Ω resistive load in series with a 68µH inductive load connected across BTL output.
Note 6: SYNC has a 200kΩ resistor to V
Signal-to-Noise Ratio
Crosstalk
Headphone Off-Isolation
Click-and-Pop Level
Capacitive-Load Drive
Gain
Gain Accuracy
ESD Protection
DIGITAL INPUTS (SHDN, SYNC, HPS, GAIN_, SEL_)
Input Voltage High
Input Voltage Low
Input Leakage Current (Note 6)
HPS Input Current
DD
_______________________________________________________________________________________
= PV
R
Headphone mode testing performed with a 32Ω resistive load connected to GND. Mode transitions are controlled by SHDN. K
level is calculated as: 20 x log [(peak voltage during mode transition, no input signal)/(peak voltage under normal operation at
rated power level)]. Units are expressed in dB. Measured with V
DD
L
PARAMETER
= 4Ω, L = 47µH. For R
= CPV
DD
= 3.3V, GND = PGND = CPGND = 0V, SHDN = 3.3V, C1 = C2 = 1µF, C
L
= 8Ω, L = 68µH.
SYMBOL
SNR
K
V
V
C
A
REF
CP
IH
IL
L
V
= 1.25V.
A
= +25°C.) (Notes 1, 2)
R
BW = 22Hz to 22kHz
Between channels, f = 1kHz,
V
HPS = GND, speaker amplifier active,
f = 1kHz
Peak voltage, A-
weighted, 32
samples per second
(Notes 4, 5)
GAIN1 = 0, GAIN2 = 0
GAIN1 = 0, GAIN2 = 1
GAIN1 = 1, GAIN2 = 0
GAIN1 = 1, GAIN2 = 1
HPOUTR, HPOUTL, IEC Air Discharge
SYNC input
All other logic inputs
HPS = GND
L
IN
= 32Ω, V
= 200mV
OUT
P-P
CONDITIONS
= 300mV
DD
Into shutdown
Out of shutdown
Into mute
Out of mute
= 5V.
RMS
,
BIAS
MIN
2
= 0.047µF, SYNC = GND, R
1000
TYP
101
-58
-53
-92
-73
80
96
±8
-2
7
4
1
A
= T
MAX
±2.5
±25
-10
0.8
±1
MIN
to T
UNITS
dBV
L
dB
dB
dB
pF
dB
µA
µA
kV
%
V
V
MAX
= ∞,
CP
,