Texas Instruments SoundPlus INA1651EVM, Руководство пользователя, Страница: 3 / 20

+
±
+
±
VCC
VEE
IN+ A
COM A
IN- A
OUT A
VREF A
VMID (IN)
VMID (OUT)
VCC VEE
VCC VEE
R4
C9
C6 C11
R1
R5
C7
+ INPUT
- INPUT
C10
J8
R2
C8
R3
OUTPUT
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Introduction
3 SBOU212 – September 2018
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Copyright © 2018, Texas Instruments Incorporated
INA1651EVM SoundPlus™ High Common-Mode Rejection Line Receiver
Evaluation Module
1 Introduction
The INA1651 is a high common-mode rejection audio line receiver from the SoundPlus line of audio
amplifier products from Texas Instruments. For a full list of electrical characteristics of the INA1651,
please refer to the INA1651 product data sheet (
INA165x SoundPlus™ High Common-Mode Rejection
Line Receivers ).
2 EVM Measured Performance Summary
A summary of the INA1651EVM performance specifications is provided in Table 1 . Specifications are
given for a supply voltage of V
S
= ±15 V at an ambient temperature of 25°C, unless otherwise noted.
Table 1. INA1651EVM Measured Performance Summary
Specification Test Conditions Measured Performance
Common-Mode Rejection Ratio (CMRR) V
IN
= 1 V
RMS
at 1 kHz –90 dB
THD+N at 1 kHz V
IN
= 22 dBu –121 dB
Second Harmonic V
OUT
= 10 V
RMS
, F = 1 kHz –142.86 dBc
Start-Up Time 1.5 s
3 Modifications
This EVM is designed to provide access to the features of and measure the performance of the INA1651.
Modifications of the INA1651EVM can be made and include; adjusting the ac-coupled corner frequency,
filtering the VMID (IN) pin, adjusting the start-up time, and increasing the common-mode input impedance.
A simplified schematic of the INA1651EVM is displayed in
Figure 2 . For a full schematic of the
INA1651EVM, see Figure 13 .
Figure 2. Simplified INA1651EVM Schematic