REV. 0

AD10226

–13–

These characteristics result in both a reduction of electromagnetic

interference (EMI) and an overall improvement in performance.

It is important to design a layout that prevents noise from coupling

to the input signal. Digital signals should not be run in parallel

with input signal traces and should be routed away from the input

circuitry. The PCB should have a ground plane covering all unused

portions of the component side of the board to provide a low

impedance path and manage the power and ground currents. The

ground plane should be removed from the area near the input

pins to reduce stray capacitance.

Solder Reflow Profile

The Solder Reflow Profile for the AD10226 is shown in Figure 6.

TIME – Seconds

0

50

100

250

200

150

050

100

150

200

250

300

350

400

Figure 6. Typical Solder Reflow Profile

LAYOUT INFORMATION

The schematic of the evaluation board (Figures 7a–7d) represents

a typical implementation of the AD10226. The pinout of the

AD10226 is very straightforward and facilitates ease of use and the

implementation of high-frequency/high resolution design prac-

tices. It is recommended that high quality ceramic chip capacitors

be used to decouple each supply pin to ground directly at the device.

All capacitors can be standard high quality ceramic chip capacitors.

Care should be taken when placing the digital output runs. Because

the digital outputs have such a high slew rate, the capacitive load-

ing on the digital outputs should be minimized. Circuit traces for

the digital outputs should be kept short and connect directly to

the receiving gate. Internal circuitry buffers the outputs of the

AD9433 ADC through a resistor network to eliminate the need

to externally isolate the device from the receiving gate.

EVALUATION BOARD

The AD10226 evaluation board (Figures 7a–7d) is designed to

provide optimal performance for evaluation of the AD10226

analog-to-digital converter. The board encompasses everything

needed to ensure the highest level of performance for evaluating the

AD10226. The board requires an analog input signal, an ENCODE

clock and power supply inputs. The clock is buffered on-board to

provide clocks for the latches. The digital outputs and out clocks

are available at the standard 40-pin connectors J1 and J2. Power

to the analog supply pins is connected via banana jacks. The analog

supply powers the associated components and analog section of the

AD10226. The digital outputs of the AD10226 are also powered

via banana jacks with 3.3 V. Contact the factory if additional layout

or application assistance is required.

BILL OF MATERIALS LIST FOR AD10226 EVALUATION BOARD

Quantity

Reference Designator

Value

Description

Part Number

2

U16, U17

IC, Low Voltage 16-Bit D-Type Flip-Flop

74LCX16374MTD

with 5 V Tolerant Inputs and Outputs

(Fairchild)

1U1

IC, BGA 35

35 385

AD10226AB

2

U14, U15

IC, Precision Low Dropout any CAP

ADP3330ART-3.3-RL7

Voltage Regulator

(Analog)

4

R38, R39, R56, R58

33 k

Ω

RES 33 k

Ω 1/10W 0.1% 0805 SMD

ERA-6YEB333V (Panasonic)

8

R1, R7, R8, R41, R60, R61, R71, R72

51

Ω

RES 51

Ω 1/10W 5% 0805 SMD

ERJ-6GEYJ510V (Panasonic)

32

R3, R4, R9–R18, R23–R30, R35,

100

Ω

RES 100

Ω 1/10W 1% 0805 SMD

ERJ-6ENF1000V

R36, R40, R42–R46, R63–R66

(Panasonic)

23

C1, C2, C5–C10, C12, C16–C18,

0.1

µF

CAP 0.1

µF 50 V Ceramic Y5V 0805

ECJ-2VF1H104Z

C20–C26, C28, C33–C35

(Panasonic)

2

C13, C27

0.47

µF CAP 0.47 µF 25 V Ceramic Y5V 0805

ECJ-2YF1E474Z (Panasonic)

2

J1, J2

2

20 Male Connector Strip, 100 Centers

TSW-120-08G-D (Samtec)

4

L1, L2, L3, L4

47

Ω

SMT Ferrite Bead

2743019447 (Fair Rite)

4

U2, U3, U9, U11

IC, 3.3 V/5 V ECL Differential

MC10EP16D

Receiver/Driver

(Motorola)

8

E3–E6, E25, E26, E33, E34

Power Jack, Banana Plug

108-0740-001 (Johnson Company)

2

U4, U10

3.3 V Dual Differential

SY100ELT23L

LVPECL-to-LVTTL Translator

(Micrel-Synergy)

10

C3, C4, C11, C14, C15, C19,

10

µF

Solid Tantalum Chip Capacitor,

T491C106M016AS

C29, C30–C32

10

µF, 16 V, 20%

(KEMET)

8

J3–J7, J10–J12

SMA PLUG 200Mil STR GOLD

142-0801-201

(Johnson Components Inc.)

4

Spacer Aluminum, Hex M–F (Standoff)

4

Nut Hex Stl #4-40 UNC-2B

1

AD10201/AD10226 Evaluation Board

GS03983 Rev. A (PCB)

2

C36, C37

CAP 0.047

µF 25 V Ceramic Y5V 0603

ECJ-1VB1C473K

6

JP3, JP4, JP6, JP8, JP9, JP12

0

Ω

RES 0

Ω 1/16 W 5% 0402

ER J-2GEOR00