ADSQ-1410 データシートの表示（PDF） - Murata Power Solutions

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ADSQ-1410

Quad 14-Bit, 10 MSPS Sampling A/D Converter

Murata Power Solutions 

SPECIFICATION DEFINITIONS

Total Harmonic Distortion (THD): Ratio of total RMS harmonic power to

RMS fundamental power

THD = 10 X log (RMS of all harmonics/RMS of fundamental)

SNR With Distortion (SINAD): Ratio of RMS power present in output,

excluding fundamental: to the RMS fundamental power

SINAD = 10 X log (fundamental RMS / RMS of remaining output);

expressed in db

SNR without Distortion (SNR): Ratio of RMS power present in output,

excluding fundamental and harmonics: to the RMS power of the funda-

mental

SNR = 10 X log (fundamental RMS / RMS of power present in output,

excluding fundamental and harmonics, to the fundamental; expressed

in db

Spurious Free Dynamic Range (SFDR): Difference between fundamental

peak value and the value of highest spike present in the output (harmonic

or spur).

SFRD = Fundamental (dB) – Highest Spur (dB) ; expressed in db

PSSR: Survo-loop is employed applying an input voltage that forces

output codes to FS-1LSB. One supply voltage is changed to the specified

limits and any change in input voltage recorded. The change in input volt-

age is divided by the full scale voltage and then divided by percent change

in power supplies. The resulting units are % / %.

Zero Error: Survo-loop is employed applying an input voltage that forces

output codes to:

Unipolar devices - LSB on half of the time and all other bits off.

Bipolar devices - MSB on, the LSB on half the time and all other bits off.

The input voltage is compared to 0V.

The result is = Input voltage - 0.5 LSB.

Offset Error: Survo-loop is employed applying an input voltage that forces

output codes to LSB on half of the time, and all other bits off.

The input voltage is compared to 0V for unipolar devices, and -0.5 X full

scale for bipolar devices. The result is this difference - 0.5 LSBs.

Full Scale Absolute Accuracy: Survo-loop is employed applying an input

voltage that forces output codes to LSB on half of the time and all other bits

on. The input voltage is compared to full scale for unipolar devices, and 0.5

X full scale for bipolar devices. The result is this difference + 1.5 LSBs.

Gain Error: The result is the difference between the Offset Error result and

the Full Scale Absolute Accuracy result.

Dynamic DNL Min: An AC signal is input to the device. 2n x 128 (2.1e6 for

14 bit converter) samples are taken, and the number of times each code

appears is recorded. The data is normalized using ideal sine wave values.

The result is the most negative and most positive numbers in the array.

Grounded Input RMS Noise: Input to the device is tied to Signal Ground.

2n x 128 (2.1e6 for 14 bit converter) samples are taken and stored in an

array. The result is the RMS value of this array.

ADSQ-1410

Quad 14-Bit, 10 MSPS Sampling A/D Converter

Typical Performance Curves and Plots

Dynamic DNL

Fs: 4.85 MHz Fs: 10MHz Range Voltage: 2.5V

0.6

0.4

0.2

0

-0.2

-0.4

-0.6

Grounded Input Histogram 16384 points

RANGE pin = 2.5V

80%

70%

60%

50%

40%

30%

20%

10%

0%

8193

8194

More

Grounded Input Histogram 16384 points

RANGE pin = 1V

5 0.00 %

4 0.00 %

3 0.00 %

2 0.00 %

1 0.00 %

0.00 %

8196 8197 8198 8199 8200 8201 8202 8203 More

www.murata-ps.com

Technical enquiries email: data.acquisition@murata-ps.com, tel: +1 508 339 3000

MDA_ADSQ.B01 Page 8 of 11

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