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Optional Configurations

3 Optional Configurations

3.1 THS4509 Input Op-Amp Configuration

The default analog input configuration is a transformer coupling through T1 and T2 for channel A, and T3

and T4 for channel B. The optional configuration for analog input is through an Operational-Amplifier

(OPA), THS4509. The changes required to modify the transformer coupled input to the OPA-driven input

are shown in Table 3.

Table 3. Jumper Setting for Transformer-Coupled or OPA-Driven Input

Jumpers or 0 Ω Transformer-Coupled Input (default) OPA-Driven Input

R119 Install Do not install

R123 Install Do not install

R120 Do not install install

R129 Do not install install

R143 Install Do not install

R141 Install Do not install

R131 Do not install Install

R132 Do not install Install

R93 Install Do not install

R94 Install Do not install

R95 Do not install Install

R96 Do not install Install

R97 Install Do not install

R98 Install Do not install

R99 Do not install Install

R114 Do not install Install

SJP3 Shunt 2 - 3, default Shunt 1 - 2

SJP4 Shunt 2 - 3, default Shunt 1 - 2

J11 and J13 are the power supply for THS4509. An on-board layout option for an LPF or BPF is available

between the amplifier and the ADC. By default, the filter is bypassed allowing the flexibility of designing

according to the desired specifications.

3.2 On-Board CDCE72010 Clock

The default clock input configuration is 1:4 transformer coupling through T6. The optional configuration is

through clock driver CDCE72010. The changes required to modify the transformer coupled clock input to

clock driver input are shown in Table 4.

Table 4. Jumper Setting for Transformer-Coupled or CDCE72010 Input

Jumper Transformer-Coupled (Default) CDCE72010

J14 shunt open

JP20 Shunt 1 - 2 Shunt 1 - 2

JP21 Shunt 1 - 2 Shunt 1 - 2

J18 open open

R121 0 Ω DNI

R122 DNI 0 Ω

SJP7 Short 1 - 2 Short 3 - 4

SJP6 Short 3 - 4 Short 5 - 6

SLAU333A–March 2011–Revised June 2013 ADS42xx EVM

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