AD9020SLASHPCB datasheet(5/12 Pages) AD

5 / 12 page

AD9020

–5–

REV. A

NC = NO CONNECT

AD9020

TOP VIEW

(Not to Scale)

SENSE

REF

GND

ENCODE

GND

(LSB) D

LSBs INVERT

GND

OVERFLOW

9 (MSB)

–V

SENSE

–V

REF

–V

AD9020 PIN FUNCTION DESCRIPTIONS

Pin No.

Name

Function

1/2REF

Midpoint of internal reference ladder.

2, 16, 28, 29, 35, 41, 42,

–VS

Negative supply voltage; nominally –5.0 V

± 5%.

54, 64

3, 6, 15, 18, 25, 30, 33, 34,

+VS

Positive supply voltage; nominally +5 V

± 5%.

37, 40, 45, 52, 55, 65, 68

4, 5, 13, 17, 27, 31, 32,

GROUND

All ground pins should be connected together and to low impedance ground

36, 38, 39, 43, 53, 66, 67

plane.

3/4REF

Three-quarter point of internal reference ladder.

8, 9

ANALOG IN

Analog input; nominally between

±1.75 V.

+VSENSE

Voltage sense line to most positive point on internal resistor ladder.

Normally +1.75 V.

+VREF

Voltage force connection for top of internal reference ladder. Normally driven

to provide +1.75 V at +VSENSE.

ENCODE

TTL-compatible convert command used to begin digitizing process.

19–23, 46–50

D0–D9

TTL-compatible digital output data.

OVERFLOW

TTL-compatible output indicating ANALOG IN > +VSENSE.

–VREF

Voltage force connection for bottom of internal reference ladder. Normally

driven to provide –1.75 V at –VSENSE.

–VSENSE

Voltage sense line to most negative point on internal resistor ladder.

Normally –1.75 V.

LSBs INVERT

Normally grounded. When connected to +VS, lower order bits (D0–D8) are

inverted.

MSB INVERT

Normally grounded. When connected to +VS, most significant bit (MSB; D9)

is inverted.

1/4REF

One-quarter point of internal reference ladder.

AD9020/PCB Folha de dados(PDF) 5 Page - Analog Devices

AD9020/PCB Folha de dados(HTML) 5 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12

Folha de dados Download

Ligação URL