CXA3086 Ver la hoja de datos (PDF) - Sony Semiconductor

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CXA3086

6-bit 140MSPS Flash A/D Converter

Sony Semiconductor 

CXA3086Q

Notes on Board Operation

1. The factory settings for the CXA3086Q Evaluation Board are as follows.

VRB.R1 = 1.5V

VRT.R2 = 3.0V

OFFSET.R3 = 2.25V

FULL SCALE.R4 = –1V

FULL SCALE.R5 = –1V

S1 A : OPEN, B : SHORT

S2 8 : SHORT (1/8 frequency division)

When using the board in this condition, the input signals should be input at the amplitudes shown below.

(The frequency is set as desired.)

Analog input signal: CON1 (AMP.IN)

0V center, 800mVp-p or less

Clock input signal: CON3 (CLK.IN)

0V center, 1.0Vp-p

2. When the analog signal is input from the CON1 (AMP.IN) pin, IC2:CLC404 limits the input dynamic range

of the A/D converter's analog input signal.

3. When the analog input signal is a sine wave or other repeating waveform, the signal can be input from the

CON2 (DIR.IN) pin with AC coupling. In these cases, the input dynamic range is not limited, but the VRT

level may be limited by IC3: NJM3403A.

4. In the evaluation board of the CXA3086Q, CLC404 (Comlinear) is employed for IC2 to drive the analog

input signal. Though, CLC505 (Comlinear) can also be used instead of CLC404, there should be a little

change in the peripheral circuit in this case.

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