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AD9634

Data Sheet

Rev. B | Page 10 of 30

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

24 CSB

23 SCLK

22 SDIO

21 DCO+

20 DCO–

19 D10+/D11+ (MSB)

18 D10–/D11– (MSB)

17 DRVDD

CLK+

CLK–

AVDD

OR–

OR+

D0–/D1– (LSB)

D0+/D1+ (LSB)

DRVDD

AD9634

TOP VIEW

(Not to Scale)

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.

Figure 3. Pin Configuration

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

Type

Description

ADC Power Supplies

8, 17

DRVDD

Supply

Digital Output Driver Supply (1.8 V Nominal).

3, 27, 28, 31, 32

AVDD

Supply

Analog Power Supply (1.8 V Nominal).

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.

DNC

Do No Connect. Do not connect to this pin.

ADC Analog

VIN+

Input

Differential Analog Input Pin (+).

VIN−

Input

Differential Analog Input 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 Outputs

OR+

Output

Overrange—True.

OR−

Output

Overrange—Complement.

D0+/D1+ (LSB)

Output

DDR LVDS Output Data 0/Data 1—True (LSB).

D0−/D1− (LSB)

Output

DDR LVDS Output Data 0/Data 1—Complement (LSB).

D2+/D3+

Output

DDR LVDS Output Data 2/Data 3—True.

D2−/D3−

Output

DDR LVDS Output Data 2/Data 3—Complement.

D4+/D5+

Output

DDR LVDS Output Data 4/Data 5—True.

D4−/D5−

Output

DDR LVDS Output Data 4/Data 5—Complement.

D6+/D7+

Output

DDR LVDS Output Data 6/Data 7—True.

D6−/D7−

Output

DDR LVDS Output Data 6/Data 7—Complement.

D8+/D9+

Output

DDR LVDS Output Data 8/Data 9—True.

D8−/D9−

Output

DDR LVDS Output Data 8/Data 9—Complement.

D10+/D11+ (MSB)

Output

DDR LVDS Output Data 10/Data 11—True (MSB).

D10−/ D11− (MSB)

Output

DDR LVDS Output Data 10/Data 11—Complement (MSB).

DCO+

Output

LVDS Data Clock Output—True.

DCO−

Output

LVDS Data Clock Output—Complement.

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