Texas Instruments AFE5818, Руководство пользователя

Страница: 32 / 63

EVM Headers, Test Points, and Configuration
www.ti.com
32 SLOU430A – December 2015 – Revised February 2016
Submit Documentation Feedback
Copyright © 2015–2016, Texas Instruments Incorporated
Hardware Configuration
Table 1 lists the default header configurations and descriptions.
Table 1. Default Header Configuration Table Rev.C
Jumper Circuit Description Pin Numbers Selection
J3 Power Supply ±5V Input Power Connector - -
J4 USB/SPI SPI Signals Probe Point – –
J23 PDN PDN_Global – –
J24 PDN PDN_Fast – –
J37 ADC Clock OSC1 Xtal Power 3.3VD 1-2 3.3V
J36 ADC Clock Clk source selector for SE Xtal or Diff 2-4,1-3 Differential
J34 ADC Clock Diff CLK Source selector, Ext Xfmr or LMK 3-5, 4-6 LMK CLK
J38 CW CLK 16x CLK Source Selector 1-2 Ext
J40 CW CLK 1x CLK Source Selector 1-2 Ext
J50 DTGC DTGC Digital Input Signals – –
J51 DTGC GND for Dig Input Signals – –
J42 DTGC CPLD JTAG Programming Header – –
J44 DTGC CPLD GPIO – –
J30 LMK LMK Chip Reset – –
J29 LMK LMK Supply for 125M Xtal – –
J33 LMK PS for 100 MHz VCO 1-2 3.3V
J31 LMK Input Clk selector for Clkin1 (xtal/J32 SMA) 1-2 125 MHz Xtal
J45 Vcnt VCntl AFE pin selector, GND or Amp 2-3 Amp
J46 Vcnt Vcntl Amp voltage source, pot or SMA 2-3 Pot
J47 Vcnt SE-to-Diff Amp Bypass 1-2 Bypassed
J49 Vcnt Vcntl Amp CM voltage to GND – –
J26 LNA TR Enable TR_EN 1-4 – –
J52/54 CW Output CW In-phase Output M/P – –
J56/58 CW Output CW Quadrature-phase Output M/P – –
B.1.2 EVM Testpoints
Table 2 lists all test points on the AFE5818 EVM and their purposes.
Table 2. EVM Rev.C Testpoints
Testpoint Circuit Label Testpoint Description
TP2,11–14 GND GND Digital Ground Reference for EVM
TP16,17,56 GND AGND Analog Ground Reference for EVM
TP18 GND USB_GND USB Ground Reference for EVM
TP1 Power Supply +5V_IN +5V_IN
TP3 Power Supply -5V_IN -5V supply for Op-Amp circuitry
TP4 Power Supply AVDD_1.8 AFE +1.8V analog supply
TP5 Power Supply DVDD_1.8 AFE +1.8V digital supply
TP6 Power Supply DVDD_1.2 AFE +1.2V digital supply
TP7 Power Supply OPAMP- -5V Supply for Vcntl circuit
TP8 Power Supply +3.3VA +3.3VA
TP9 Power Supply AVDD_H AFE analog supply for 5V or 3.3V
TP10 Power Supply None +5V Supply for Op Amp circuitry
TP15 Power Supply AVDD_M AFE analog supply for 1.9V or 3.3V
TP36 Power Supply +Vs +5V Supply for CW Op Amp circuitry
TP37 Power Supply –Vs -5V Supply for CW Op Amp circuitry
TP19–34 Analog Inputs INPx Analog Input Channel 1-16
TP39 DEMOD TX_TRG TX_Trig input
TP52 DTGC None Ext TGC_Profile2 Input
TP50 DTGC None Ext TGC_Profile1 Input