Texas Instruments APA100 manual 7. TPA2001D1 Block Diagram

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TPA2001D1 (Class-D Modulator)

Figure 4−7. TPA2001D1 Block Diagram

		VDD	AGND
		VDD
	Pre-Amp			Integrator		Comparator
	Gain			_	Cint2	+	Deglitch	Gate
INN	Gain			_		_	Deglitch	Gate
INN	Adj.		Rs2			_	Logic	Drive
			Rs2	+
				+
		_	+
			+
		cmv
		+
				+
	Gain			_
INP	Adj.		Rs1			+	Deglitch	Gate
						+
						_
						_	Logic	Drive
					Cint1
SDZ	SDZ						Startup	OC
SDZ	TTL						Protection	OC
	TTL						Protection	Detect
	Input						Logic	Detect
GAIN1	Input		Biases				Logic
GAIN1	Buffers			Ramp
	Buffers
			and
GAIN0			and	Generators
GAIN0	Gain	2	References	Generators
	Gain	2
							Thermal	VDDok
COSC
ROSC
BYPASS

PVDD

OUTN

PGND

PVDD

OUTP

PGND

Figure 4−8 shows the output PWM signal and the input signal of the TPA2001D1.

Figure 4−8. TPA2001D1 Inputs and Outputs With 20−kHz Sine Wave

VOUT+
CH1
VOUT−
CH2
VOUT
Differential
CH3
VIN
CH4
Ch1: 3V/Div Ch2: 3V/Div Ch3: 3V/Div Ch4: 1V/Div
t − Time − 5	ms

4-8

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Contents User’s Guide Important Notice Read This First About This ManualRelated Documentation From Texas Instruments Contents Figures TablesEVM Overview Features Power RequirementsEVM Basic Function/Block Diagram 2 TPA2001D1 and TLV2464A Supply Voltage 3-V Reference−2. APA100 EVM Block Diagram PCB Design PCB Layout Split Ground PlaneBridge Layout PCB Layers −4. Bottom Copper and Silkscreen −1. Parts List Bill of MaterialsSchematic Page EVM Operation Power Supply Quick StartPower−Up/Down Sequence Reset Button/MuteError Signals Changing the Gain Technical Information −1 shows the block diagram of the feedback loop Feedback System Design−2. Open− and Closed−Loop Frequency Response −4. APA100 Integrator Design Feedback System Design −5. Pspice Circuit for Simulating the Feedback TPA2001D1 Class-D Modulator −6. Pspice Simulation of Open−Loop Response−7. TPA2001D1 Block Diagram TLV2464A Gain Setting and Feedback TAS5111 H-BridgeLC Filter −9. APA100 Output FilterThermal −1. TAS5111 Thermal TableThermal Measured Results Total Harmonic Distortion + Noise −1. APA100 THD+N vs Frequency With 4- W Load−3. APA100 THD+N vs Output Power With 4- W Load Output Power −5. APA100 Output Power vs Supply Voltage With 4- W Load−7. APA100 Efficiency vs Output Power With 4- W Load EfficiencyGain and Phase Response Signal-to-Noise Ratio SNRSupply Ripple Rejection

APA100 specifications

Texas Instruments is known for its innovation in the field of analog and embedded processing, with the APA100 being one of its noteworthy products. The APA100 is an advanced analog front-end (AFE) device designed to meet the needs of various applications including industrial, automotive, medical, and consumer electronics.

One of the standout features of the APA100 is its high-resolution data conversion capability. It integrates both analog-to-digital converters (ADCs) and digital-to-analog converters (DACs), providing unmatched precision and accuracy in signal processing. The device supports multiple sampling rates, which allows it to adapt to various requirements in different applications, ensuring optimal performance.

The power efficiency of the APA100 is another significant characteristic. Designed with low-power consumption in mind, it enables battery-operated devices to maximize their lifespan while maintaining reliable performance. This energy efficiency makes the APA100 suitable for wearables and portable medical devices, where power management is critical.

In addition to its power efficiency, the APA100 features integrated signal conditioning, which includes amplifiers and filters that enhance the quality of the input signals. This capability reduces the need for external components, thereby simplifying system design and reducing overall costs. With its built-in signal conditioning, engineers can expect improved accuracy and reduced noise in their measurements.

Texas Instruments has also included advanced communication interfaces in the APA100, such as SPI and I2C, to facilitate seamless integration with microcontrollers and processors. This flexibility allows for easy implementation into existing systems, enabling developers to take full advantage of the device's features without extensive re-engineering.

The APA100 is also designed for robustness, featuring a wide operating temperature range, making it suitable for use in harsh environments. This reliability is crucial for industrial applications where device performance can be affected by temperature fluctuations.

Overall, the Texas Instruments APA100 is an exceptional analog front-end device that combines high precision, low power consumption, integrated signal conditioning, and robust design. Its versatile features make it an ideal choice for various applications, paving the way for advancements in technology and improved performance across different sectors. With the APA100, engineers have a powerful tool that can help them innovate and enhance their products in highly competitive markets.