MAX9701 datasheet(3/22 Pages) MAXIM

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1.3W, Filterless, Stereo Class D Audio

Power Amplifier

_______________________________________________________________________________________

Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.

Note 2: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For RL = 4Ω, L = 33µH.

For RL = 8Ω, L = 68µH.

Note 3: When driving speakers below 4

Ω with large signals, exercise care to avoid violating the absolute maximum rating for continuous

output current.

Note 4: Testing performed with 8

Ω resistive load in series with 68µH inductive load connected across the BTL output. Mode transi-

tions are controlled by SHDN. KCP level is calculated as: 20 x log[(peak voltage under normal operation at rated power

level) / (peak voltage during mode transition, no input signal)]. Units are expressed in dB.

ELECTRICAL CHARACTERISTICS (continued)

(VDD = PVDD = SHDN = 3.3V, GND = PGND = 0V, SYNC = 0V (FFM), gain = 6dB (GAIN1 = 0, GAIN2 = 1), RL connected between

OUT+ and OUT-, RL = ∞, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SYNC_OUT Capacitance Drive

CSYNC_OUT

100

Bridge-tied capacitance

200

Capacitive Drive

Single ended

400

Into shutdown

66.16

Click-and-Pop Level

KCP

Peak reading, THD+N = 1%

A-weighted, 32 samples

per second (Note 4)

Out of

shutdown

66.26

VDD = 3.3V, POUT = 500mW per channel,

fIN = 1kHz, RL = 8

Efficiency

VDD = 5V, POUT = 1000mW per channel,

fIN = 1kHz, RL = 8

87.4

GAIN1 = 0, GAIN2 = 0

10.5

19.5

GAIN1 = 1, GAIN2 = 0

GAIN1 = 0, GAIN2 = 1

37.4

Input Resistance

RIN

GAIN1 = 1, GAIN2 = 1

GAIN1 = 0, GAIN2 = 0

GAIN1 = 1, GAIN2 = 0

GAIN1 = 0, GAIN2 = 1

Gain

GAIN1 = 1, GAIN2 = 1

Channel-to-Channel Gain

Tracking

Crosstalk

L to R, R to L, f = 10kHz, RL = 8

Ω,

POUT = 300mW

DIGITAL INPUTS (SHDN, SYNC, GAIN1, GAIN2)

Input-Voltage High

VINH

Input-Voltage Low

VINL

0.8

Input Leakage Current

(SHDN, GAIN1, GAIN2)

±1µA

VIN = GND, normal operation

-15

-7

Input Leakage Current (SYNC)

VIN = VDD, normal operation

µA

DIGITAL OUTPUTS (SYNC_OUT)

Output-Voltage High

VOH

IOH = 3mA, VDD = 3.3V

2.4

Output-Voltage Low

VOL

IOL = 3mA

0.08

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