AD7861

REV. B

–3–

Number

Symbol

AD7861 Timing Requirements

Min

Max

Units

CS Low Before Falling Edge of RD

0–

ns

ADDR Valid Before Falling Edge of

RD

0–

ns

DATA Valid After Falling Edge of

RD

–25

ns

RD Pulsewidth, Low

25

–

ns

RD Pulsewidth, High

25

–

ns

DATA Hold After Rising Edge of

RD

10

–

ns

ADDR Hold After Rising Edge of

RD

0–

ns

CS Hold After Rising Edge of RD

0–

ns

CLK Period

80

160

ns

10

CLK Pulsewidth, High

20

–

ns

11

CLK Pulsewidth, Low

20

–

ns

12

RESET Pulsewidth, Low

2

× tperclk –

ns

7, 8

3

1, 2

CLK

CS

A0–A1

RD

DATA

BUS

6

4

5

Figure 1. Clock and Reset Timing

9

10

11

CLK

12

CLK

RESET

Figure 2. Write Cycle Timing Diagram

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD7861 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

ORDERING GUIDE

Model

Temperature Range

Package Option

AD7861AP

–40

°C to +85°C

P-44A

ABSOLUTE MAXIMUM RATINGS*

Analog Reference Input Voltage . . . . . . . . . . .

Analog Reference Output Swing . . . . . . . . . . .

Operating Temperature . . . . . . . . . . . . . . . . . –40

°C to +85°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +280

°C

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those indicated in the operational

section of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

WARNING!

ESD SENSITIVE DEVICE