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AD9643

Rev. A | Page 14 of 36

CLK+

CLK–

SYNC

DNC

(LSB) B D0–/D1–

(LSB) B D0+/D1+

DRVDD

B D2–/D3–

B D2+/D3+

B D4–/D5–

B D4+/D5+

B D6–/D7–

B D6+/D7+

NOTES

1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.

2. THE EXPOSED THERMAL PADDLE ON THE BOTTOM OF THE

PACKAGE PROVIDES THE ANALOG GROUND FOR THE PART.

THIS EXPOSED PADDLE MUST BE CONNECTED TO GROUND FOR

PROPER OPERATION.

PDWN

OEB

CSB

SCLK

SDIO

OR+

OR–

A D12+/D13+ (MSB)

A D12–/D13– (MSB)

A D10+/D11+

A D10–/D11–

DRVDD

A D8+/D9+

A D8–/D9–

A D6+/D7+

A D6–/D7–

AD9643

CHANNEL

MULTIPLEXED

(EVEN/ODD)

LVDS

TOP VIEW

(Not to Scale)

PIN 1

INDICATOR

Figure 5. LFCSP Channel Multiplexed (Even/Odd) LVDS Pin Configuration (Top View)

Table 9. Pin Function Descriptions for Channel Multiplexed (Even/Odd) LVDS 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).

4, 5, 6, 7

DNC

Do Not Connect. Do not connect to this pin.

AGND,

Exposed Paddle

Ground

Analog Ground. The exposed thermal paddle on the bottom of the

package provides the analog ground for the part. This exposed

paddle 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.

DNC

Do Not Connect. Do not connect to this pin.

DNC

Do Not Connect. Do not connect to this pin.

DNC

Do Not Connect. Do not connect to this pin.

VCM

Output

Common-Mode Level Bias Output for Analog Inputs. This pin

should be decoupled to ground using a 0.1 μF capacitor.

CLK+

Input

ADC Clock Input—True.

CLK−

Input

ADC Clock Input—Complement.

Digital Input

SYNC

Input

Digital Synchronization Pin. Slave mode only.

Digital Outputs

B D0−/D1− (LSB)

Output

Channel B LVDS Output Data 0/Data 1—Complement.

B D0+/D1+ (LSB)

Output

Channel B LVDS Output Data 0/Data 1—True.

B D2−/D3−

Output

Channel B LVDS Output Data 2/Data 3—Complement.

B D2+/D3+

Output

Channel B LVDS Output Data 2/Data 3—True.

B D4−/D5−

Output

Channel B LVDS Output Data 4/Data 5—Complement.

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