AD10226AB 查看數據表（PDF） - Analog Devices

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AD10226AB

Dual-Channel, 12-Bit 125 MSPS IF Sampling A/D Converter

Analog Devices 

AD10226

10MHz = 52.22 – j0.421

50MHz = 50.69 – j2.84

100MHz = 47.50 – j3.58

150MHz = 44.61 – j0.970

200MHz = 43.70 + j3.70

250MHz = 46.41 + j9.48

300MHz = 53.09 + j14.76

TPC 13. Input Impedance S11

10

9

1MHz = 1.010

10MHz = 1.028

8

50MHz = 1.045

100MHz = 1.066

140MHz = 1.090

7

160MHz = 1.126

200MHz = 1.170

6

5

4

3

2

1

0

0.1

1

10

100

1000

FREQUENCY – MHz

TPC 14. Voltage Standing Wave Ratio (VSWR)

Equivalent Circuits

VCC

ENCODE

8k⍀

24k⍀

8k⍀

24k⍀

ENCODE

VCC

VCC

Q1

NPN

Test Circuit 1. Equivalent ENCODE Input

VCC

100⍀

DIGITAL

OUTPUT

VREF OUTPUT

Test Circuit 3. Equivalent Voltage Reference Output

VCC

AIN2

AIN1

50⍀

3.75k⍀

3.75k⍀

15k⍀

15k⍀

Test Circuit 2. Equivalent Digital Output

Test Circuit 4. Equivalent Analog Input

DEFINITION OF TERMS

Analog Bandwidth

The analog input frequency at which the spectral power of the

fundamental frequency (as determined by the FFT analysis) is

reduced by 3 dB.

Aperture Delay

The delay between the 50% point on the rising edge of the ENCODE

command and the instant at which the analog input is sampled.

Differential Nonlinearity

The deviation of any code from an ideal 1 LSB step.

ENCODE Pulsewidth/Duty Cycle

Pulsewidth high is the minimum amount of time that the

ENCODE pulse should be left in logic “1” state to achieve rated

performance; pulsewidth low is the minimum time ENCODE

pulse should be left in low state. At a given clock rate, these specs

define an acceptable ENCODE duty cycle.

Aperture Uncertainty (Jitter)

The sample-to-sample variation in aperture delay.

–10–

REV. 0

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