8.2.2.2 Differential-to-Single-Ended Output Conversion

Many systems use ADCs with single-ended inputs that cannot connect directly to the differential output of the

AMC0x00D. Figure 8-3 shows a circuit for converting the differential output signal into a single-ended signal in

front of the ADC. For R1 = R3 and R2 = R4, the output voltage equals (R2 / R1) × (VOUTP – VOUTN) + VREF. For

C1 = C2 the bandwidth of the filter becomes 1 / (2 × π × C1 × R1). Configure the bandwidth of the filter to match

the bandwidth requirement of the system. For best linearity, use capacitors with low voltage coefficients (such

as NP0-type capacitors). For most applications, R1 = R2 = R3 = R4 = 3.3kΩ and C1 = C2 = 330pF yield good

performance.

+

–

R4

R3

R1

R2

V

REF

ADC

To MCU

C1

C2

TLV9001

VDD2

OUTP

OUTN

GND2

Figure 8-3. Connecting the AMC0x00D Output to a Single-Ended Input ADC

The following reference guides provide further information on the general procedure to design the filtering and

driving stages of SAR ADCs. These reference guides are available for download at www.ti.com.

• 18-Bit, 1MSPS Data Acquisition Block (DAQ) Optimized for Lowest Distortion and Noise reference guide

• 18-Bit Data Acquisition Block (DAQ) Optimized for Lowest Power reference guide

www.ti.com

AMC0200D, AMC0300D

SBASAR7 – SEPTEMBER 2025

Copyright © 2025 Texas Instruments Incorporated

Submit Document Feedback

25

Product Folder Links: AMC0200D AMC0300D