MP8830AE 查看數據表（PDF） - Exar Corporation

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MP8830AE

Triple 10-bit High Speed Analog-to-Digital Converter with Digitally Controlled References

Exar Corporation 

MP8830

Pass Through Mode

1. AENL, BENL & CENL should be held high during pass-through mode. ADCs and DACs will not work properly during pass-through.

2. Pass-through mode enable. When CREN is high, pass-through mode between the ADC and DAC ports is enabled. RNW controls the direction

of pass-through operation.

3. READ not WRITE signal. RNW controls the direction of the pass-through operation when CREN is high, and has no impact when CREN is low.

When RNW is high, data passes from the DAC port to the ADC port. When RNW is low, data passes from the ADC port to the DAC port. Note the

port connections are: CD5; AD0; CD6; AD1;...;CD14; AD9.

CREN

RNW

CD

(5-14)

AD

(0-9)

t17

t13

External circuits must stop

driving CD (5-14) when RNW falls

and CREN is high

t17

External circuits can

start driving CD (5-14)

t13

t17 t14

t14

t17

Chip stops

External circuit can

driving AD (0-9) start driving AD (0-9)

Chip drives AD(0-9)

data from last conversion

Note: external circuits must stop

driving AD(0–9) when CREN falls

CREN

RNW

CD

(5-14)

AD

(0-9)

External circuits must stop

driving CD (5-14) when CREN rises

and RNW is low

Chip stops driving CD(5-14)

External circuits can

start driving CD(5-14)

t17 t14

t14

t17 t13

t13

Chip stops

driving AD (0-9)

External circuits can

start driving AD(0-9)

External circuits must

stop driving AD (0-9)

T13

Pass through delay from CD(5-14) to AD(0-9)

T14

Pass through delay from AD(0-9) to CD(5-14)

T17

Pass through set up time

t17

Chip drives AD(0-9)

data from last conversion

Figure 4. Timing for Pass Through Mode Operation

Rev. 1.00

9

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