The APA2037 is a stereo, fully differential Class-AB audio amplifier which can operate with supply voltage from 2.4V to 5V and is available in a TQFN5x5-20A package.
Features
Operating Voltage: 2.4V~5.5V
Fully Differential Class-AB Amplifier
High PSRR and Excellent RF Rectification
Immunity
Low Crosstalk
3W Per Channel Output Power into 3Ω
Load at VDD=5V
Thermal and Over-Current Protections
Built-In Feedback Resistors Eliminate
External Components Counts
Space Saving Package
– TQFN5x5-20A
Lead Free and Green Devices Available
(RoHS Compliant)
General Description
The APA2037 is a stereo, fully differential Class-AB audio
amplifier which can operate with supply voltage from 2.4V
to 5V and is available in a TQFN5x5-20A package.
The built-in feedback resistors can minimize the external
component counts and save the PCB space. High PSRR
and fully differential architecture increase immunity to
noise and RF rectification. In addition to these features, a
short start-up time and small package size make the
APA2037 is an ideal choice for LCD TVs and notebook
PCs and Portable devices.
The APA2037 also integrates the de-pop circuitry that re-
duces the pops and click noises during power on/off and
shutdown mode operation. Both Thermal and over-cur-
rent protections are integrated to avoid the IC being de-
stroyed by over temperature and short-circuit.
The APA2037 is capable of driving 3W at 5V into 3Ω
speaker.
Applications

Part_No | Pack & Pins | Class AB/D | VDD Voltage (V) | IDD, Supply Current (mA) | TSTART -UP (uS) | Output Power RL= 4W(W) | Output Power RL= 8W(W) | Head phone Mode Output Power RL=32W (mW) | Total Harmonic Distortion Plus Noise (%) | Power Supply Rejection Ratio(dB) | Output Noise (uV) | Signal to Noise Ratio (dB) | Output Offset Voltage (mV) | Digital Input | Headp hone | AGC/ Power limit | Mute | |
min | max | |||||||||||||||||
APA0713 | SOP-8 | AB | 2.6 | 5.5 | 0.9 | 0.38 | 1.5 | 0.9 | NA | 0.15 | 74 | 28 | NA | 20 | N | N | N | N |
APA0714 | MSOP-8 | AB | 2.4 | 5.5 | 3 | 0.065 | 2.1 | 1.3 | NA | 0.05 | 80 | 15 | 105 | 5 | N | N | N | N |
APA2010/A | WLCSP1.5x1.5-9A | D | 2.4 | 5.5 | 2 | NA | 2.45 | 1.45 | NA | 0.1 | 80 | 100 | 90 | 25 | N | N | N | N |
APA2010B | WLCSP1.5x1.5-9A | D | 2.4 | 5.5 | 2 | NA | 2.45 | 1.45 | NA | 0.1 | 80 | 100 | 90 | 25 | N | N | N | N |
APA2011/A | WLCSP1.5x1.5-9A | D | 2.4 | 5.5 | 3 | NA | 2.2 | 1.3 | NA | 0.05 | 70 | 100 | 89 | 20 | N | N | N | N |
APA2012 | WLCSP1.2x1.2-9 | D | 2.4 | 5.5 | 1.8 | 0.004 | 2.45 | 1.3 | NA | 0.1 | 75 | 55 | 90 | 1 | N | N | N | N |
APA2030/1 | TSSOP-24P | AB | 3.3 | 5.5 | 6 | NA | 1.7 | 1.1 | 90 | 0.04 | 85 | 15 | 105 | 5 | N | Y | N | N |
APA2036/A | TQFN4x4-16 | AB | 3 | 5.5 | 5.5 | 0.7 | 2 | 1.3 | 52 | 0.06 | 61 | 22 | 93 | 10 | N | Y | N | N |
APA2037 | TQFN5x5-20A | AB | 2.4 | 5.5 | 6 | 0.065 | 2.1 | 1.3 | NA | 0.05 | 80 | 15 | 105 | 5 | N | N | N | N |
APA2051 | TQFN4x4-28 | AB | 4.5 | 5.5 | 17.5 | NA | 1.9 | 1.2 | 120 | 0.15 | 70 | 80 | 90 | 10 | N | Y | N | N |
APA2057A | TSSOP-28P | AB | 4.5 | 5.5 | 17.5 | NA | 1.9 | 1.2 | 120 | 0.15 | 70 | 80 | 90 | 10 | N | Y | N | N |
APA2058 | TQFN5x5-32A | AB | 4.5 | 5.5 | 9 | 0.025 | 1.9 | 1.3 | 120 | 0.07 | 75 | 22 | 100 | 5 | N | Y | N | N |
APA2060 | TQFN5x5-32 | AB | 4.5 | 5.5 | 9 | 0.025 | 1.9 | 1.3 | 120 | 0.07 | 75 | 22 | 100 | 5 | N | Y | N | N |
APA2061 | TQFN5x5-32A | AB | 4.5 | 5.5 | 9 | 0.025 | 1.9 | 1.3 | 120 | 0.07 | 75 | 22 | 100 | 5 | N | Y | N | N |
APA2068 | SOP-16P | AB | 4.5 | 5.5 | 9 | 1 | 1.8 | 1.3 | 95 | 0.07 | 60 | 20 | 95 | 5 | N | Y | N | N |
APA2069 | DIP-16 | AB | 4.5 | 5.5 | 9 | NA | 2 | 1.3 | 95 | 0.07 | 60 | 20 | 95 | 5 | N | Y | N | N |
APA2070 | DIP-16 | AB | 4.5 | 5.5 | 9 | NA | 2 | 1.3 | 95 | 0.07 | 60 | 20 | 95 | 5 | N | Y | N | N |
APA2071 | DIP-16 | AB | 3.3 | 5.5 | 9 | 1.6 | 2 | 1.3 | 95 | 0.09 | 60 | 20 | 95 | 5 | N | Y | N | N |
APA2120 | TSSOP-24P | AB | 4.5 | 5.5 | 14 | NA | 1.9 | 1.1 | 90 | 0.05 | 60 | 20 | 95 | 5 | N | Y | N | N |
APA2600 | TQFN3x3-16 | D | 2.4 | 5.5 | 3 | 0.02 | 2.3 | 1.34 | NA | 0.15 | 74 | 100 | 85 | 5 | N | N | N | N |
SOP-16P | D | 3.3 | 5.5 | 8 | 1.6 | 2.4 | 1.4 | NA | 0.1 | 55 | 75 | 90 | 20 | N | N | N | Y | |
APA2603A | SOP-24 | D | 3.3 | 5.5 | 6.5 | 1.6 | 2.2 | 1.3 | 60 | 0.1 | 70 | 75 | 82.5 | 5 | N | Y | A | Y |
APA2603B | SOP-16 | D | 3.3 | 5.5 | 8 | 1.6 | 2.4 | 1.1 | NA | 0.1 | 70 | 75 | 85 | 10 | N | N | A | Y |
APA2605 | SSOP-24 | D | 3.3 | 5.5 | 5 | 1.2 | 2.3 | 1.3 | NA | 0.1 | 70 | 80 | 85 | 20 | N | N | A | Y |
APA2606 | SSOP-24 | D | 3.3 | 5.5 | 5 | 1.2 | 2.25 | 1.3 | 68 | 0.06 | 60 | 80 | 78 | 20 | N | Y | A | Y |
APA2607 | TQFN5x5-32 | D | 8 | 16.5 | 18 | 1 | NA | 12 | NA | 0.07 | 65 | 230 | NA | 20 | N | N | N | Y |
APA2613 | TSSOP-28P | D | 8 | 26 | 20 | 0.016 | NA | 7 | NA | 0.1 | NA | 120 | 95 | 15 | N | N | P | N |
APA2613A | TSSOP-28P | D | 8 | 26 | 20 | 0.016 | NA | 8 | NA | 0.1 | NA | 120 | 95 | 15 | N | N | P | N |
APA2614 | TSSOP-28P | D | 8 | 26 | 20 | 0.016 | NA | 12 | 0.1 | NA | 65 | 120 | 95 | 15 | N | N | P | N |
APA2615 | QFN5.2x6.2-32 | D | 8 | 16.5 | 18 | 1 | NA | 14 | NA | 0.05 | 65 | 250 | NA | 20 | N | N | N | Y |
APA3002 | TQFN-7x7-48 | D | 8.5 | 14 | 20 | NA | NA | 7.5 | NA | 0.2 | 85 | 250 | 85 | 20 | N | N | N | N |
APA3010/1 | SOP-8 | AB | 2.5 | 5.5 | 7 | 0.38 | 2.3 | 1.3 | NA | 0.04 | 60 | 28 | NA | NA | N | N | N | N |

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