TLV5535

8-BIT, 35 MSPS, LOW-POWER ANALOG-TO-DIGITAL CONVERTER

SLAS221 – JUNE 1999

17

POST OFFICE BOX 655303

TLV5535 EVALUATION MODULE

TLV5535 evaluation module

TI provides an evaluation module (EVM) for TLV5535. The EVM also includes a 10b 80 MSPS DAC so that the

user can convert the digitized signal back to the analog domain for functional testing. Performance

measurements can be done by capturing the ADC’s output data.

The EVM provides the following additional features:

input.

circuit is used that derives adjustable bottom and top reference voltages from a bandgap reference. Two

potentiometers allow for the independent adjustments of both references. The full scale ADC range can be

adjusted to the input signal amplitude.

provided on a single connector. The EVM can thus be part of a larger (DSP) system for prototyping.

Figure 15 shows the EVM schematic.

The EVM is factory shipped for use in the following configuration:

analog input

J10. This signal is onboard terminated with 50

Ω. There is no onboard biasing of the signal. When using external

both references to shift. R6 only impacts the bottom reference. The range of these signals for which the device

section.

clock input

sampling frequency on connector J9. This signal is onboard terminated with 50

Ω. Both ADC and DAC run off

the same clock signal. Alternatively the clock can be applied from terminal 1 on connector J11. A third option

is using a crystal oscillator. The EVM board provides the footprint for a crystal oscillator that can be populated

by the end-user, depending on the desired frequency. The footprint is compatible with the Epson EG-8002DC

series of programmable high-frequency crystal oscillators. Refer to the TLV5535 EVM Settings for selecting

between the different clock modes.