AD9237BCP-20(RevC) データシートの表示（PDF） - Analog Devices

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AD9237BCP-20
(Rev.:RevC)

12-Bit, 20 MSPS/40 MSPS/65 MSPS 3 V Low Power A/D Converter

Analog Devices 

AD9237

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

Data Sheet

MODE2 1

CLK 2

OE 3

PDWN 4

GC 5

DNC 6

D0 (LSB) 7

D1 8

AD9237

TOP VIEW

(Not to Scale)

24 VREF

23 SENSE

22 MODE

21 OTR

20 D11 (MSB)

19 D10

18 D9

17 D8

NOTES

1. DNC = DO NOT CONNECT.

2. IT IS RECOMMENDED THAT THE EXPOSED PADDLE

BE SOLDERED TO THE GROUND PLANE.

Figure 3. Pin Configuration

Table 6. Pin Function Descriptions

Pin Number

Mnemonic

1

MODE2

2

CLK

3

OE

4

PDWN

5

GC

6

DNC

7 to 14, 17 to 20 D0 (LSB) to D11 (MSB)

15

DGND

16

DRVDD

21

22

23

24

25

26

27, 32

OTR

MODE

SENSE

VREF

REFB

REFT

AVDD

28, 31

29

30

EP

AGND

VIN+

VIN−

Description

SHA Gain Select and Power Scaling Control (see Table 8).

Clock Input Pin.

Output Enable Pin (Active Low).

Power-Down Function Selection (see Table 9).

Gray Code Control (Active High).

Do Not Connect.

Data Output Bits.

Digital Output Ground.

Digital Output Driver Supply. Must be decoupled to DGND with a minimum 0.1 μF capacitor.

Recommended decoupling is 0.1 μF in parallel with 10 μF.

Out-of-Range Indicator.

Data Format and Clock Duty Cycle Stabilizer (DCS) Mode Selection (see Table 10).

Reference Mode Selection (see Table 7).

Voltage Reference Input/Output (see Table 7).

Differential Reference (−). Must be decoupled to REFT with a minimum 10 μF capacitor.

Differential Reference (+).

Analog Power Supply. Must be decoupled to AGND with a minimum 0.1 μF capacitor.

Recommended decoupling is 0.1 μF in parallel with 10 μF.

Analog Ground.

Analog Input Pin (+).

Analog Input Pin (−).

It is recommended that the exposed paddle be soldered to the ground plane. There is an

increased reliability of the solder joints and maximum thermal capability of the package is

achieved with exposed paddle soldered to the customer board.

Rev. C | Page 8 of 24

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