ADA4530-1R-EBZ User Guide

UG-865

Rev. 0 | Page 7 of 14

BUFFER WITH RESISTOR AT IN+ TO GROUND

To configure the DUT as a buffer with a large resistor at the

noninverting pin to ground, use the ADA4530-1R-EBZ-BUF

evaluation board and remove JP1. Large value, through hole

resistors (RS2) can be placed between the noninverting pin and

ground using the P7 and P4 pin sockets. Place one end of the

leaded resistor at P7 and the other end at P4 (GND). If an SMT

assembly of a 1206 or 1210 package size resistor. This configu-

Table 4. Buffer with Resistor at IN+ to Ground Pad

Pad

Description

JP1

0 Ω

JP3

Unconnected

RF1

0 Ω

Used for a SMT source resistor

Used for a through hole source resistor

RS1

(SMT)

RS2

(THROUGH HOLE)

RF1

0Ω

Figure 9. Buffer with Resistor at IN+ to Ground

J2

(BNC)

OUTPUT

U1

V+

RO

499Ω

RF1

0Ω

V–

RS2

(THROUGH HOLE)

JP1

0Ω

RS1

(SMT)

J1

(TRIAX)

INPUT

TRIAX

GUARD

Figure 10. Buffer with Resistor at IN+ to Ground Schematic

NONINVERTING GAIN

To configure the ADA4530-1 in a noninverting gain, use the

components shown in Table 5. Choose appropriate RF1 and

RS3 values for the desired gain. Note that the pre-assembled

RF1 must be replaced with a resistor of choice.

Pad/Connector

Description

JP1

0 Ω

JP3

Short TRIAX GUARD to AMP GUARD

RF1

Replace 0 Ω resistor with resistor of choice

RS3

Populate with resistor of choice

SHORT TRIAX GUARD

TO AMP GUARD

RF1

RS3

JP1

0Ω

Figure 11. Noninverting Gain

J2

(BNC)

OUTPUT

J1

(TRIAX)

INPUT

TRIAX

GUARD IS

CONNECTED

TO AMP GUARD

U1

V+

RO

499Ω

RF1

V–

RS3

JP1

0Ω

Figure 12. Noninverting Gain Schematic