OPA172IDR Datasheet, PDF (14/29 Pages) Texas Instruments – 36-V Single-Supply 10-MHz Rail-to-Rail Output Operational Amplifiers

OPA172
OPA2172
OPA4172
SBOS618 – DECEMBER 2013
APPLICATION INFORMATION
www.ti.com
The OPAx172 family of operational amplifiers provide high overall performance, making them ideal for many
general-purpose applications. The excellent offset drift of only 1.5 µV/°C (max) provides excellent stability over
the entire temperature range. In addition, the device offers very good overall performance with high CMRR,
PSRR, A_OL and THD.
OPERATING CHARACTERISTICS
The OPAx172 family of amplifiers is specified for operation from 4.5 V to 36 V (±2.25 V to ±18 V). Many of the
specifications apply from –40°C to +125°C. Parameters that can exhibit significant variance with regard to
operating voltage or temperature are presented in the Typical Characteristics.
EMI REJECTION
The OPAx172 uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI from
sources such as wireless communications and densely-populated boards with a mix of analog signal chain and
digital components. EMI immunity can be improved with circuit design techniques; the OPAx172 benefits from
these design improvements. Texas Instruments has developed the ability to accurately measure and quantify the
immunity of an operational amplifier over a broad frequency spectrum extending from 10 MHz to 6 GHz.
Figure 41 shows the results of this testing on the OPAx172. Table 2 shows the EMIRR IN+ values for the
OPAx172 at particular frequencies commonly encountered in real-world applications. Applications listed in
Table 2 can be centered on or operated near the particular frequency shown. Detailed information can also be
found in Application Report SBOA128, EMI Rejection Ratio of Operational Amplifiers, available for download
from www.ti.com.
160.0
140.0
120.0
P_RF = -10 dBm
V_SUPPLY = ±18 V
V_CM = 0 V
100.0
80.0
60.0
40.0
20.0
0.0
10M
100M
1G
Frequency (Hz)
10G
C017
Figure 41. EMIRR Testing
FREQUENCY
400 MHz
900 MHz
1.8 GHz
2.4 GHz
3.6 GHz
5.0 GHz
Table 2. OPAx172 EMIRR IN+ for Frequencies of Interest
APPLICATION OR ALLOCATION
Mobile radio, mobile satellite, space operation, weather, radar, ultrahigh frequency
(UHF) applications
Global system for mobile communications (GSM) applications, radio
communication, navigation, GPS (to 1.6 GHz), GSM, aeronautical mobile, UHF
applications
GSM applications, mobile personal communications, broadband, satellite, L-band
(1 GHz to 2 GHz)
802.11b, 802.11g, 802.11n, Bluetooth^®, mobile personal communications,
industrial, scientific and medical (ISM) radio band, amateur radio and satellite, S-
band (2 GHz to 4 GHz)
Radiolocation, aero communication and navigation, satellite, mobile, S-band
802.11a, 802.11n, aero communication and navigation, mobile communication,
space and satellite operation, C-band (4 GHz to 8 GHz)
EMIRR IN+
47.6 dB
58.5 dB
68 dB
69.2 dB
82.9 dB
114 dB
14
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: OPA172 OPA2172 OPA4172