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18bit precision AD conversion board-18bit precision AD conversion board
18bit precision AD conversion board-Special Electronic Circuit Co., Ltd.

18bit precision AD conversion board
Special Electronic Circuit Co., Ltd.


About This Product

For special electronic circuits, we have developed a precision A/D conversion board with 18-bit accuracy. This board uses Analog Devices' AD7986 and achieves true 18-bit accuracy. Noise is extremely low at approximately 1.3LSB (approximately 40μV), enabling accurate measurements. The connector for connecting the coaxial cable uses a gold-plated SMA connector. Each channel has a differential configuration. Single-ended use is also possible.

■Noise when there is no signal

The noise when there is no signal is approximately 1.3LSB, which is 42μV when converted to voltage. With an 18-bit ADC, the value never stops, but this 1.3LSB performance is almost the same as the performance of the ADC itself.

■Strain rate

When a state variable oscillator was created and a sine wave of about 20kHz was input, simple measurements showed that a distortion rate of -90dB or less was achieved. Since it is not easy to perform more precise measurements, we are currently considering measurement methods.

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    18bit precision AD conversion board

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1 Models of 18bit precision AD conversion board

Image Part Number Price (excluding tax) Resolution Input method Input full scale Input impedance Input op amp Preamp gain Preamplifier distortion rate Noise Number of channels Sampling rate Gain error Offset voltage INL DNL ADC
18bit precision AD conversion board-Part Number-18bit precision AD conversion board

18bit precision AD conversion board

$ 583.70〜

1LSB = 19.07μV

Single-ended (when using OPA211) or differential (when using AD8253)

±2.500V

50Ω or open

Switch OPA211 or AD8253 with jumper

Can be switched to 1, 10, 100, 1000 times (when using AD8253)

Approx. (-100dB (approx. 0.0005%) (when using OPA211)

Approximately 50μV or less

2CH

2MHz

0.01% or less

1mV or less

3LSB or less (estimated value)

±0.3LSB or less (estimated value)

Analog Devices AD7986 18bit

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