AD9238-65PCB(RevA) Ver la hoja de datos (PDF) - Analog Devices

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componentes Descripción

Fabricante

AD9238-65PCB
(Rev.:RevA)

12-Bit, 20/40/65 MSPS Dual A/D Converter

Analog Devices 

AD9238

PIN CONFIGURATION

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

AGND 1

VIN+_A 2

VIN–_A 3

AGND 4

AVDD 5

REFT_A 6

REFB_A 7

VREF 8

SENSE 9

REFB_B 10

REFT_B 11

AVDD 12

AGND 13

VIN–_B 14

VIN+_B 15

AGND 16

PIN 1

IDENTIFIER

AD9238

64-LEAD LQFP

TOP VIEW

(Not to Scale)

48 D4_A

47 D3_A

46 D2_A

45 D1_A

44 D0_A

43 DNC

42 DNC

41 DRVDD

40 DRGND

39 OTR_B

38 D11_B (MSB)

37 D10_B

36 D9_B

35 D8_B

34 D7_B

33 D6_B

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Pin Number

2

3

15

14

6

7

11

10

8

9

18

63

19

20

21

60

22

59

44–51, 54–57

25–27, 30–38

39

58

62

61

5, 12, 17, 64

1, 4, 13, 16

28, 40, 53

29, 41, 52

23, 24, 42, 43

DNC = DO NOT CONNECT

Mnemonic

VIN+_A

VIN–_A

VIN+_B

VIN–_B

REFT_A

REFB_A

REFT_B

REFB_B

VREF

SENSE

CLK_B

CLK_A

DCS

DFS

PDWN_B

PDWN_A

OEB_B

OEB_A

D0_A (LSB)–D11_A (MSB)

D0_B (LSB)–D11_B (MSB)

OTR_B

OTR_A

SHARED_REF

MUX_SELECT

AVDD

AGND

DRGND

DRVDD

DNC

PIN FUNCTION DESCRIPTIONS

Description

Analog Input Pin (+) for Channel A

Analog Input Pin (–) for Channel A

Analog Input Pin (+) for Channel B

Analog Input Pin (–) for Channel B

Differential Reference (+) for Channel A

Differential Reference (–) for Channel A

Differential Reference (+) for Channel B

Differential Reference (–) for Channel B

Voltage Reference Input/Output

Reference Mode Selection

Clock Input Pin for Channel B

Clock Input Pin for Channel A

Enable Duty Cycle Stabilizer (DCS) Mode

Data Output Format Select Bit (Low for Offset Binary, High for Twos Complement)

Power-Down Function Selection for Channel B (Active High)

Power-Down Function Selection for Channel A (Active High)

Output Enable Bit for Channel B

Output Enable Bit for Channel A (Low Setting Enables Channel A Output Data Bus)

Channel A Data Output Bits

Channel B Data Output Bits

Out-of-Range Indicator for Channel B

Out-of-Range Indicator for Channel A

Shared Reference Control Bit (Low for Independent Reference Mode,

High for Shared Reference Mode)

Data Multiplexed Mode. (See description for how to enable; high setting disables

output data Multiplexed mode).

Analog Power Supply

Analog Ground

Digital Output Ground

Digital Output Driver Supply. Must be decoupled to DRGND with a minimum

0.1 µF capacitor. Recommended decoupling is 0.1 µF capacitor in parallel with 10 µF.

Do Not Connect Pins. Should be left floating.

–6–

REV. A

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