MAX9716EUA ,Low-Cost, Mono, 1.4W BTL Audio Power AmplifiersFeaturesThe MAX9716/MAX9717 audio power amplifiers are ideal♦ 2.7V to 5.5V Single-Supply Operationf ..
MAX9716EUA+T ,Low-Cost, Mono, 1.4W BTL Audio Power AmplifiersELECTRICAL CHARACTERISTICS—5V Supply(V = 5V, V = 0V, SHDN = V , T = +25°C. C = 1µF, R = R = 20kΩ (M ..
MAX9717BEUA ,Low-Cost, Mono, 1.4W BTL Audio Power AmplifiersBlock DiagramsSINGLE SUPPLY SINGLE SUPPLY2.7V TO 5.5V 2.7V TO 5.5VBIAS BIASMAX9716 MAX9717B/C/DIN- ..
MAX9718AETB ,Low-Cost, Mono/Stereo,1.4W Differential Audio Power AmplifiersBlock DiagramSINGLE SUPPLY2.7V TO 5.5VSINGLE SUPPLY2.7V TO 5.5VOUTL+INL+OUT+IN+INL-OUTL-OUTR+INR+IN ..
MAX9718AETB+ ,Low-Cost, Mono/Stereo, 1.4W Differential Audio Power AmplifiersApplicationsPin Configurations appear at end of data sheet.Mobile PhonesUCSP is a trademark of Maxi ..
MAX9718AETB+T ,Low-Cost, Mono/Stereo, 1.4W Differential Audio Power AmplifiersELECTRICAL CHARACTERISTICS—5V Supply(V = 5V, GND = 0, SHDN/SHDN = V (MAX9718/MAX9719), SHDM = GND ( ..
MB89193AP ,8-bit Proprietary MicrocontrollerFEATURES • Minimum execution time: 0.95 m s at 4.2 MHz (VCC = 2.7 V) 2•F MC-8L family CPU core•Two ..
MB89193PF ,8-bit Proprietary MicrocontrollerFUJITSU SEMICONDUCTORDS07-12512-7EDATA SHEET8-bit Proprietary MicrocontrollerCMOS2F MC-8L MB89190/1 ..
MB89475 ,F2MC-8L/Low Power/Low Voltage Microcontrollersapplications forconsumer product.2* : F MC stands for FUJITSU Flexible Microcontroller.n
MB89535A ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFEATURES• Wide range of package options• Two types of QFP packages (1 mm pitch, 0.65 mm pitch) • LQ ..
MB89535A ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFUJITSU SEMICONDUCTORDS07-12547-4EDATA SHEET8-bit Original Microcontroller CMOS2F MC-8L MB89530A Se ..
MB89537A , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MAX9716ETA-MAX9716EUA-MAX9717BEUA
Low-Cost, Mono, 1.4W BTL Audio Power Amplifiers
General DescriptionThe MAX9716/MAX9717 audio power amplifiers are ideal
for portable audio devices with internal speakers. A
bridge-tied load (BTL) architecture minimizes external
component count, while providing high-quality audio
reproduction. Both devices deliver 1.4W continuous
power into a 4Ωload with less than 1% Total Harmonic
Distortion (THD) while operating from a single +5V sup-
ply. With an 8Ωload, both devices deliver 1W continuous
power. These devices also deliver 350mW continuous
power into an 8Ωload while operating from a single
+3.0V supply. The devices are available as adjustable
gain amplifiers (MAX9716/MAX9717A) or with internally
fixed gains of 6dB, 9dB, and 12dB (MAX9717B/
MAX9717C/MAX9717D), reducing component count.
A low-power shutdown mode disables the bias generator
and amplifiers, reducing quiescent current consumption
to less than 10nA. These devices feature Maxim’s
industry-leading, comprehensive click-and-pop sup-
pression that reduces audible clicks and pops during
startup and shutdown.
The MAX9717 features a headphone sense input (BTL/SE)
that senses when a headphone is connected to the
device, disables the BTL slave driver, muting the speaker
while driving the headphone as a single-ended load.
The MAX9716 is pin compatible with the LM4890 and is
available in 9-bump UCSP™, 8-pin TDFN (3mm x
3mm), and 8-pin µMAX packages. The MAX9717 is
available in 9-bump UCSP, 8-pin TDFN, and 8-pin
µMAX packages. Both devices operate over the -40°C
to +85°C extended temperature range.
ApplicationsMobile Phones
PDAs
Portable Devices
Features2.7V to 5.5V Single-Supply Operation1.4W into 4Ωat 1% THD+N10nA Low-Power Shutdown Mode73dB PSRR at 1kHzNo Audible Clicks or Pops at Power-Up/DownInternal Fixed Gain to Reduce Component Count
(MAX9717B/C/D)Adjustable Gain Option (MAX9716/MAX9717A)BTL/SE Input Senses when Headphones are
Connected (MAX9717)Pin Compatible with LM4890 (MAX9716)Pin Compatible with TPA711 (MAX9717A)Available in Compact, Thermally Enhanced µMAX
and TDFN (3mm x 3mm) Packages
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
Ordering Information
Simplified Block Diagrams19-3146; Rev 0; 1/04
Pin Configurations and Selector Guide appear at end of data
sheet.UCSP is a trademark of Maxim Integrated Products, Inc.
*Future product—contact factory for availability.
**EP = Exposed paddle.
Ordering Information continued at end of data sheet.
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—5V Supply(VCC= 5V, GND = 0, SHDN= VCC, TA= +25°C. CBIAS= 1µF, RIN= RF= 20kΩ(MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
BTL/SE = GND (MAX9717_), RL= ∞connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (VCCto GND)..................................-0.3V to +6V
Any Other Pin to GND ...............................-0.3V to (VCC+ 0.3V)
IN_, BIAS, SHDN, BTL/SE Continuous Current...................20mA
OUT_ Short-Circuit Duration to GND or VCC(Note 1)...Continuous
Continuous Power Dissipation (TA= +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C).........1951mW
8-Pin µMAX (derate 10.3mW/°C above +70°C)...........825mW
9-Bump UCSP (derate 5.2mW/°C above 70°C)...........412mW
Operating Temperature Range ..........................-40°C to +85°C
Maximum Junction Temperature ....................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Bump Temperature (soldering)........................................+235°C
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
ELECTRICAL CHARACTERISTICS—5V Supply (continued)(VCC= 5V, GND = 0, SHDN= VCC, TA= +25°C. CBIAS= 1µF, RIN= RF= 20kΩ(MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
BTL/SE = GND (MAX9717_), RL= ∞connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS—3V Supply(VCC= 3V, GND = 0, SHDN= VCC, TA= +25°C. CBIAS= 1µF, RIN= RF= 20kΩ(MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
BTL/SE = GND (MAX9717_), RL= ∞connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
ELECTRICAL CHARACTERISTICS—3V Supply (continued)(VCC= 3V, GND = 0, SHDN= VCC, TA= +25°C. CBIAS= 1µF, RIN= RF= 20kΩ(MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
BTL/SE = GND (MAX9717_), RL= ∞connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)
Note 2:All specifications are tested at TA = +25°C. Specifications over temperature (TA = TMINto TMAX) are not production tested,
and guaranteed by design.
Note 3:Quiescent power-supply current is specified and tested with no load. Quiescent power-supply current depends on the off-
set voltage when a practical load is connected to the amplifier.
Note 4:Common-mode bias voltage is the voltage on BIAS and is nominally VCC/2.
Note 5:VOS= VOUT+- VOUT-.
Note 6: Theamplifier input IN- is AC-coupled to GND through CIN.
Note 7:Output power is specified by a combination of a functional output current test and characterization analysis.
Note 8:Measurement bandwidth for THD+N is 22Hz to 22kHz.
Note 9:Extended short-circuit conditions result in a pulsed output.
Note 10:Time for VOUTto rise to 50% of final DC value.
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
Typical Operating Characteristics(VCC= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, TA= +25°C, unless otherwise noted.)
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
Typical Operating Characteristics (continued)(VCC= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, TA= +25°C, unless otherwise noted.)
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
Typical Operating Characteristics (continued)(VCC= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, TA= +25°C, unless otherwise noted.)
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
Typical Operating Characteristics (continued)(VCC= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, TA= +25°C, unless otherwise noted.)
Detailed DescriptionThe MAX9716/MAX9717 are 1.3W BTL speaker ampli-
fiers. Both devices feature a low-power shutdown
mode, and industry-leading click-and-pop suppression.
The MAX9717 features a headphone sense input that
disables the slave BTL amplifier to drive the headphone
as a single-ended load. These devices consist of high
output-current audio amps configured as BTL ampli-
fiers (see Functional Diagrams). The closed-loop gain
of the input op amp sets the single-ended gain of the
device. Two external gain resistors set the gain of the
MAX9716 and MAX9717A (see the Gain-Setting
Resistorsection). The MAX9717B/C/D feature internally
set gains of 6dB, 9dB, and 12dB, respectively.
The output of the first amplifier serves as the input of the
second amplifier, which is configured as an inverting
unity-gain follower. This results in two outputs, identical in
amplitude, but 180°out-of-phase.
BIASThe MAX9716/MAX9717 operate from a single 2.7V to
5.5V supply and feature an internally generated, common-
mode bias voltage of VCC/2 referenced to ground. BIAS
provides both click-and-pop suppression and sets the DC
bias level for the audio outputs. The MAX9716 can be
configured as a single-ended or differential input. For sin-
gle-ended input, connect the noninverting input IN+ to
BIAS externally. The MAX9717 BIAS is internally connect-
ed to the amplifier noninverting input IN+.
The MAX9717 can only be used with a single-ended
input. Always bypass BIAS to ground with a capacitor.
Choose the value of the bypass capacitor as described in
the BIAS Capacitor section. Do not connect external loads
to BIAS. Any load lowers the BIAS voltage, affecting the
overall performance of the device.
BTL/SE Control InputThe MAX9717 features a headphone sense input,
BTL/SE, that enables headphone jack sensing to con-
trol the power amplifier output configuration. Driving
BTL/SE low enables the slave amplifier (OUT-). Driving
BTL/SE high disables the slave amplifier.
Shutdown ModeThe MAX9716/MAX9717 feature a low-power shutdown
mode that reduces quiescent current consumption to
10nA. Entering shutdown disables the bias circuitry,
forces the amplifier outputs to GND through an internal
20kΩresistor. Drive SHDNlow to enter shutdown
mode; drive SHDNhigh for normal operation.
Click-and-Pop SuppressionThe MAX9716/MAX9717 feature Maxim’s industry-leading
click-and-pop suppression circuitry. During startup, the
amplifier common-mode bias voltage ramps to the DC
bias. When entering shutdown, the amplifier outputs are
pulled to GND through an internal 20kΩresistor. This
scheme minimizes the energy present in the audio band.
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
MAX9716/MAX9717
Applications Information
BTL AmplifierThe MAX9716/MAX9717 are designed to drive a load
differentially, a configuration referred to as bridge-tied
load or BTL. The BTL configuration (Figure 1) offers
advantages over the single-ended configuration, where
one side of the load is connected to ground. Driving the
load differentially doubles the output voltage compared
to a single-ended amplifier under similar conditions.
Thus, the differential gain of the device is twice the
closed-loop gain of the input amplifier. The effective
gain is given by:
Substituting 2 x VOUT(P-P)for VOUT(P-P)into the following
equations yields four times the output power due to
doubling of the output voltage:
There is no net DC voltage across the load because the
differential outputs are each biased at midsupply. This
eliminates the need for DC-blocking capacitors
required for single-ended amplifiers. These capacitors
can be large and expensive, consume board space,
and degrade low-frequency performance.
Power Dissipation and Heat SinkingUnder normal operating conditions, the MAX9716/
MAX9717 dissipate a significant amount of power. The
maximum power dissipation for each package is given
in the Absolute Maximum Ratings section under
Continuous Power Dissipation or can be calculated by
the following equation:
where TJ(MAX)is +150°C, TAis the ambient temperature,
and θJAis the reciprocal of the derating factor in °C/W as
specified in the Absolute Maximum Ratings section. For
example, θJAof the TDFN package is 41°C/W.
The increase in power delivered by the BTL configuration
directly results in an increase in internal power dissipation
over the single-ended configuration. The maximum power
dissipation for a given VCCand load is given by the
following equation:
If the power dissipation for a given application exceeds
the maximum allowed for a given package, reduce
power dissipation by increasing the ground plane heat-
sinking capability and the size of the traces to the device
(see the Layout and Groundingsection). Other methods
for reducing power dissipation are to reduce VCC,
increase load impedance, decrease ambient tempera-
ture, reduce gain, or reduce input signal.
Thermal-overload protection limits total power dissipation
in the MAX9716/MAX9717. Thermal protection circuitry
disables the amplifier output stage when the junction
temperature exceeds +160°C. The amplifiers are
enabled once the junction temperature cools by 15°C. A
pulsing output under continuous thermal-overload condi-
tions results as the device heats and cools.
Fixed GainThe MAX9717B, MAX9717C, and MAX9717D feature
internally fixed gains of 6dB, 9dB, and 12dB, respec-
tively (see the Selector Guide). Fixed gain simplifies
designs, reduces pin count, decreases required foot-
print size, and eliminates external gain-setting resistors.
Resistors RINand RFshown in the MAX9717B/C/D
Typical Operating Circuitare used to achieve each
fixed gain.
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
