AD7821

REV. B

–15–

Revision History

Location

Page

10/02—Data Sheet changed from REV. A to REV. B.

Update Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Universal

Changes to FUNCTIONAL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Edit to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Change to TOTAL HARMONIC DISTORTION formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Changes to INPUT CURRENT section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Change to Figure 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Change to formula in SINUSOIDAL INPUTS section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

OUTLINE DIMENSIONS updated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

OUTLINE DIMENSIONS

20-Lead Plastic Leaded Chip Carrier [PLCC]

(P-20A)

Dimensions shown in inches and (millimeters)

0.020 (0.50)

R

BOTTOM

VIEW

(PINS UP)

0.040 (1.01)

0.025 (0.64)

0.021 (0.53)

0.013 (0.33)

0.330 (8.38)

0.290 (7.37)

0.032 (0.81)

0.026 (0.66)

0.056 (1.42)

0.042 (1.07)

0.20 (0.51)

MIN

0.120 (3.04)

0.090 (2.29)

3

4

19

18

8

9

14

13

TOP VIEW

(PINS DOWN)

0.395 (10.02)

0.385 (9.78)

SQ

0.356 (9.04)

0.350 (8.89)

SQ

0.048 (1.21)

0.042 (1.07)

0.048 (1.21)

0.042 (1.07)

0.020

(0.50)

R

0.050

(1.27)

BSC

0.180 (4.57)

0.165 (4.19)

COMPLIANT TO JEDEC STANDARDS MO-047AA

CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS

(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN