Texas Instruments TRF3701, Руководство пользователя

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TRF3701/02 EVM Operating Procedure
1-3 Overview
1.4 TRF3701/02 EVM Operating Procedure
Set up the EVM as follows:
1) Verify all settings against Table 1 - 1.
Table 1 - 1. EVM Configuration
Configuration Table
Op-Amp No Op-Amp
Single-Ended Inputs Available – TRF370x Driven
Single-Endedly
DC-Coupled Differential Inputs Available –
TRF370x Driven Differentially (Default
Configuration)
W5 pins 1 - 2, W1, W3, W7, W8, W9, W10, R6, R7, R13,
R15, R12
{
, R14
{
, R17
{
, R18
{
, C53 - C56
{
, W2
{
, W4
{
Apply dc offset (VCM = 3.7 Vdc) to J13. Adjust VCOM1 and
VCOM2 externally to optimize.Apply I signal to J4, Q to J5.
W5 pins 1 - 2, W1
{
, W3
{
, W7
{
, W8, W9
{
W10, W2, W4,
R12 - R15
{
, (C53 - C56)
⇒
replace with 0
Ω
, (R29 - R32)
⇒
if
50-
Ω
termination required.
All dc offsets adjusted externally.
Apply I signal to J9, I to J7, Q to J12, Q to J10.
Differential Inputs Available – TRF370x Driven
Differentially
DC-Coupled Single-Ended Inputs Available –
TRF370x Driven Single-Endedly
W5 pins 1 - 2,W2, W4, W8, W10, R12 - R15, R6
{
, R7
{
, R17,
R18, C53 - C56
{
, W1
{
, W3
{
, W7
{
, W9
{
Apply dc offset (VCM = 3.7 Vdc) to J13. Adjust VCOM1 and
VCOM2 externally to optimize. Residual dc can be applied
to op-amp inputs for adjusting the complementary inputs if
desired.
Apply I signal to J4, /I to J8, Q to J5 and /Q to J11.
W5 pins 1 - 2, W1, W3, W7
{
, W8, W9
{
, W10, W2
{
, W4
{
,
R12 - R15
{
, (C54, C56)
⇒
replace with 0
Ω
, C53
{
, C55
{
,
(R30, R32)
⇒
if 50-
Ω
termination required.
Apply dc offset (VCM = 3.7 Vdc) to J6 and adjust R33 and
R34 to optimize the dc offset level of the complementary I,Q
inputs.
Apply I signal to J9, Q to J12.
Single-Ended Inputs Available – TRF370x Driven
Differentially
AC-Coupled Single-Ended Inputs Available –
TRF370x Driven Single-Endedly
W5 pins 1 - 2, W2, W4, W8, W10, R12 - R15, R6, R7, R17
{
,
R18
{
, C53 - C56
{
, W1
{
, W3
{
, W7
{
, W9
{
Apply dc offset (VCM = 3.7 Vdc) to J13. Adjust VCOM1 and
VCOM2 externally to optimize. Residual dc can be applied
to op-amp inputs for adjusting the complementary inputs if
desired. In this case, follow the connections of the section
above (differential drive).
Apply I signal to J4, Q to J5.
W5 pins 1 - 2, W1, W3, W7, W8, W9, W10, W2
{
, W4
{
,
R12 - R15
{
, C54, C56, C53
{
, C55
{
, (R30, R32)
⇒
if 50-
Ω
termination required.
Apply dc offset (VCM = 3.7 Vdc) to J6 and adjust R33 and
R34 to optimize.
Apply I signal to J9, Q to J12.
AC-Coupled Differential Inputs Available –
TRF370x Driven Differentially
W5 pins 1 - 2, W1, W3, W7, W8, W9, W10, W2, W4,
R12 - R15
{
, C54, C56, C53, C55, (R29 - R32)
⇒
if 50-
Ω
termination required.
Apply dc offset (VCM = 3.7 Vdc) to J6 and adjust R33 and
R34 to optimize.
Apply I signal to J9, I to J7, Q to J12, Q to J10.
†
Remove from circuit
2) Connect the regulated power supplies to the EVM as follows:
a) Switch on the V
CC
(5 V) supply and verify that the current drawn is
approximately 130 - 140 mA.
b) Switch on the VCM (3.7 Vdc) precision regulated bias voltage supply
connected to J6 (if needed).