CS5501 Ver la hoja de datos (PDF) - Cirrus Logic

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componentes Descripción

Fabricante

CS5501

Non-aliasing, 16- & 20-bit A/D Converters

Cirrus Logic 

CDB5501 CDB5503

CDB5501/CDB5503

Analog Input: Overrange Precautions

In normal operation the value of the reference

voltage determines the range of the analog input

signal. Under abnormal conditions the analog sig-

nal can extend to be equal to the VA+ and VA-

supply voltages. In the event the signal exceeds

these supply voltages the input current should be

limited to ± 10 mA as the analog input of the chip

is internally diode clamped to both supplies. Ex-

cess current into the pin can damage the device.

On the evaluation board, resistor R16 (see Figure

6) does provide some current limiting in the event

of an overrange signal which exceeds the supply

voltage.

+5V

GND

-5V

R4

10

TP11

D1

6.8

TP13

D2

6.8

TP12

R5

10

V+

C20

10 µF

R6

10

C6

0.1 µF

C7

0.1 µF

C18

10 µF

C10

2

TP14

0.1 µF VIN

VOUT

U5

LT1019-2.5

6

R8

1M

TRIM 5

GND

R9

50 k

4

CW

C16

0.1 µF

C19

10 µF

R10

2.4

TP15

14 VA+

15 VD+

5 DGND

10 VREF

8 AGND

9 AIN

V-

C17

10 µF

C21

0.0047 µF

X7R

AIN

R7

10

C8

0.1 µF

R16

200

TP16

7 VA-

6 VD-

C9

0.1 µF

CS5501/

CS5503

U4

Figure 6. Voltage Reference / Analog Input

DS31DB43

51

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