Texas Instruments INA1620EVM, Руководство пользователя, Страница: 3 / 24

+
±
R2A (R3A) R2C (R3C)
R1A (R4A)
R1C
(R4C)
C1 (C4)
C2
(C3)
IN
±
IN+
Right Channel Input
(Left Channel Input)
Right Channel Output
(Left Channel Output)
Copyright © 2018, Texas Instruments Incorporated
www.ti.com
Introduction
3 SBOU205 – March 2018
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Copyright © 2018, Texas Instruments Incorporated
INA1620EVM Audio Amplifier Evaluation Module
1 Introduction
The INA1620 is a high-performance, bipolar-input audio operational amplifier with integrated thin-film
resistors. For a full list of electrical characteristics of the INA1620, see the
INA1620 product data sheet .
2 Performance Specification Summary
A summary of the INA1620EVM performance specifications is provided in Table 1 . Specifications are
given for a supply voltage of V
s
= ±15 V and at an ambient temperature of 25°C, unless otherwise noted.
Table 1. INA1620EVM Measured Performance Summary
SPECIFICATION TEST CONDITIONS
MEASURED
PERFORMANCE
Total Harmonic Distortion Plus Noise
(THD+N) at 1 kHz
V
IN
= 1 V
RMS
, Load = 32 Ω , measurement bandwidth =
90 kHz
–107.8 dB
THD+N vs at 1 kHz
V
IN
= 1 V
RMS
, Load = 16 Ω , measurement bandwidth =
90 kHz
–107.1 dB
Second Harmonic – Left Channel V
IN
= 1 V
RMS
, Load = 32 Ω , Fin = 1 kHz –129.62 dBV
Second Harmonic – Right Channel V
IN
= 1 V
RMS
, Load = 32 Ω , Fin = 1 kHz –125.53 dBV
Second Harmonic – Left Channel V
IN
= 1 V
RMS
, Load = 16 Ω , Fin = 1 kHz –122.91 dBV
Second Harmonic – Right Channel V
IN
= 1 V
RMS
, Load = 16 Ω , Fin = 1 kHz –121.36 dBV
CMRR - Left V
IN
= 1 V
RMS
, F
IN
= 1 kHz, no load –83 dB
CMRR - Right V
IN
= 1 V
RMS
, F
IN
= 1 kHz, no load –84 dB
3 Modifications
This EVM is designed to provide access to the features of and measure the performance of the INA1620.
The phase shift and cutoff frequency of this EVM can be modified by changing external capacitors. The
INA1620EVM allows external resistors to be used instead of the internal thin-film resistors INA1620. This
may be useful for applications where the excellent matching of the INA162 resistors is desired for another
use. The schematic of the INA1620EVM configured to use internal resistors is displayed in
Figure 1 . For a
full schematic of the INA1620EVM, see Figure 15 .
Figure 1. INA1620EVM Schematic Using Internal Resistors