ADC low-distortion balun board


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One ADC-LD-BB board is included in the hardware kit with the GSPS analog-to-digital converter (ADC) reference boards. Since the analog inputs to the ADC1xDxx00RB are differential and most signal sources are single ended, these balun boards are generally used to achieve single-ended-to-differential conversion. In case both I- and Q- inputs are simultaneously driven with a similar signal, an additional balun board of the same type may be desired.

Incidentally, this balun board may also be used to do differential-to-single-ended conversion. For example, this balun board may be used when observing the DCLK± or RCOut± signal on a single-ended scope when exploring the autosync feature on the GSPS ADC reference boards.

ADC-LD-BB uses the B0430J50100AHF from Anaren®, which is designed for high performance and low cost. Since the input impedance of the GSPS ADCs are 100 Ω and the impedance of most signal generators are 50 Ω, its 1:2 impedance ratio is very convenient. The 10-pF capacitor at the input is recommended by Anaren for best performance. This balun is also a very good choice for driving the GSPS ADC sampling clock (CLK±).

  • Balun: B0430J50100AHF
  • Balun manufacturer: Anaren
  • Frequency range: 400 MHz, 3 GHz
  • Impedance ratio: 1:2
  • Multilayer construction, low insertion loss, low distortion
High-speed ADCs (≥10 MSPS)
ADC10D1000 10-Bit, Dual 1.0-GSPS or Single 2.0-GSPS Analog-to-Digital Converter (ADC) ADC10D1000QML-SP Radiation-hardness-assured (RHA), 100-krad, ceramic, 10-bit, dual 1-GSPS or single 2-GSPS ADC ADC10D1500 10-Bit, Dual 1.5-GSPS or Single 3.0-GSPS Analog-to-Digital Converter (ADC) ADC12D1600 12-bit, dual 1.6-GSPS or single 3.2-GSPS analog-to-digital converter (ADC) ADC12D1600RF 12-bit, dual 1.6-GSPS or single 3.2-GSPS, RF-sampling analog-to-digital converter (ADC) ADC12D1800 12-bit, dual 1.8GSPS or single 3.6GSPS analog-to-digital converter (ADC) ADC12D1800RF 12-Bit, Dual 1.8GSPS or Single 3.6GSPS, RF-Sampling Analog-to-Digital Converter (ADC) ADC12D800RF 12-Bit, Dual 800-MSPS or Single 1.6-GSPS, RF Sampling Analog-to-Digital Converter (ADC)
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ADC-LD-BB/NOPB — ADC low-distortion balun board

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Technical documentation

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Type Title Date
* User guide ADC-WB-BB / ADC-LD-BB User’s Guide 07 May 2012
Certificate ADC-LD-BB/NOPB EU Declaration of Conformity (DoC) 02 Jan 2019

Related design resources

Hardware development

ADC12D1600RB 12-bit, dual 1.6-/1.8-GSPS or single 3.2-/3.6-GSPS ADC reference board

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