Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsDev KitsPCB design board

LVDS LVDS

GND

3.3V

VSS-

VS +5V

ADC

CLKIN

IN+

J16

J11

J12

IN-

J10

J19

J20

J21

CDC

OUT

VCXO

OUT

J13

USB

R84

R24R23

R93 (bottom)

R66

R101R100

R106R99

R97

R98

R96

R82

R95

R94

R115

R113

R114

R110

R108

R107

R81

R111

R112

R86 (bottom)

R38 (bottom)R46 (bottom)

R20

R65 (bottom)

R7 (bottom)

R19 (bottom)

R67 (bottom)

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Circuit Description

Figure 2. ADS41xx/58B18 Surface Jumpers

The following sections describe the function of individual circuits. See the relevant data sheet for device

operating characteristics.

2.2.1 Power

Power is supplied to the EVM through banana jacks; from this input power, three different ways are

available of delivering power to the ADC and the other EVM functions . Figure 3 shows a simplified

representation of the power options available for the ADS41xx/58B18EVM. The default option is to provide

3.3 V to the red banana jack J16, and from there the EVM generates 1.8 V for the analog and digital

supplies to the ADC. The 1.8-V rails for the ADC can be generated from the 3.3-V input either through a

low-noise dropout regulator (TPS79618), from a switching regulator (TPS62562) for maximum power

efficiency or from an external 1.8-V power supply. The EVM also generates the proper voltages for

optional features of the EVM such as the Clock Generation circuitry, the USB circuitry, and the CMOS

output buffer.

SLWU067C–November 2009–Revised May 2012 ADS41xx/58B18EVM

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