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TIPD127
PWM to 12-bit Analog Signal Conversion Circuit
TIPD127
Overview
This TI Precision Verified Design provides the theory, component selection, simulation, PCB design, and measurement details for a PWM to 12-bit resolution analog signal conversion circuit. Methods for selecting the passive filter’s order, cutoff frequency, and component values are included. This design example includes a 12 bit filter but the methodology can be applied to target other desired resolutions. This design also includes a test circuit, which is required to confirm that the output error (ripple) meets the design requirements because it cannot be directly measured using standard test equipment.
Features
- 3.3 Vpp 50% duty cycle PWM input
- 12-bit resoluion, 0-3.3V analog output
- 403 uVpp Maximum ripple
- Error (ripple) verification circuit included
- Supply Voltage: ±15 V dc (for post amplifier)
- Post amplifier gain: 1024 V/V, ac coupled
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDC027.ZIP (669 K)
Detailed schematic diagram for design layout and components
TIDR288.PDF (305 K)
Detailed schematic diagram for design layout and components
TIDR289.PDF (87 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDC017.ZIP (325 K)
Design file that contains information on physical board layer of design PCB
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Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | User guide | Microcontroller PWM to 12-Bit Analog Out Design Guide | Nov. 11, 2013 |
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