AD9268 datasheet(13/44 Pages) AD

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AD9268

Rev. A | Page 13 of 44

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

CLK+

CLK–

SYNC

D0B (LSB)

D1B

D2B

D3B

D4B

D5B

DRVDD

D6B

D7B

D8B

D9B

D10B

D11B

PDWN

OEB

CSB

SCLK/DFS

SDIO/DCS

ORA

D15A (MSB)

D14A

D13A

D12A

D11A

DRVDD

D10A

D9A

D8A

D7A

AD9268

PARALLEL CMOS

TOP VIEW

(Not to Scale)

NOTES

1. THE EXPOSED THERMAL PAD ON THE BOTTOM OF THE PACKAGE

PROVIDES THE ANALOG GROUND FOR THE PART. THIS EXPOSED

PAD MUST BE CONNECTED TO GROUND FOR PROPER OPERATION.

Figure 6. LFCSP Parallel CMOS Pin Configuration (Top View)

Table 8. Pin Function Descriptions (Parallel CMOS Mode)

Pin No.

Mnemonic

Type

Description

ADC Power Supplies

10, 19, 28, 37

DRVDD

Supply

Digital Output Driver Supply (1.8 V Nominal).

49, 50, 53, 54, 59,

60, 63, 64

AVDD

Supply

Analog Power Supply (1.8 V Nominal).

AGND,

Exposed Pad

Ground

The exposed thermal pad on the bottom of the package provides the analog

ground for the part. This exposed pad must be connected to ground for proper

operation.

ADC Analog

VIN+A

Input

Differential Analog Input Pin (+) for Channel A.

VIN−A

Input

Differential Analog Input Pin (−) for Channel A.

VIN+B

Input

Differential Analog Input Pin (+) for Channel B.

VIN−B

Input

Differential Analog Input Pin (−) for Channel B.

VREF

Input/Output

Voltage Reference Input/Output.

SENSE

Input

Voltage Reference Mode Select. See Table 11 for details.

RBIAS

Input/Output

External Reference Bias Resistor.

VCM

Output

Common-Mode Level Bias Output for Analog Inputs.

CLK+

Input

ADC Clock Input—True.

CLK−

Input

ADC Clock Input—Complement.

Digital Input

SYNC

Input

Digital Synchronization Pin. Slave mode only.

Digital Outputs

D0A (LSB)

Output

Channel A CMOS Output Data.

D1A

Output

Channel A CMOS Output Data.

D2A

Output

Channel A CMOS Output Data.

D3A

Output

Channel A CMOS Output Data.

D4A

Output

Channel A CMOS Output Data.

D5A

Output

Channel A CMOS Output Data.

D6A

Output

Channel A CMOS Output Data.

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