Transcript Example Applications

OPAx172: OPA172 | OPA2172 | OPA4172
36V Single-Supply | 10MHz | RRO Op-Amp
Features
Benefits

Supply Range: +4.5 V to +36 V, ±2.25 V to ±18 V

DC performance:
 Support low voltage sensor inputs to high voltage
industrial applications
 High accuracy and precision over the entire
industrial temperature range
 Wide bandwidth and fast response suitable to
drive high performance ADCs
 Enable sensing of signals close to supply/ground
and maximizes the dynamic range and improved
SNR of the signal chain
 Clean signal with improved noise immunity
 Suitable for driving inductive loads
 Increased stability and reduced peaking


Offset Voltage: 1 mV (max)

Offset Voltage Drift: 1.5 µV/°C (max)

Low Bias Current: 15 pA (max)
AC performance:

GBW: 10 MHz

Slew Rate: 10 V/µs

Noise Voltage: 7 nV/√Hz

Low Quiescent Current: 1.8 mA/ch (max)

EMI/RFI Filtered Inputs, Rail-to-rail Output

Short circuit current: 75 mA

High capacitive load drive: 300 pF

Superior THD Performance: 0.00005%

Applications


Tracking Amplifier in Power Modules
Transducer Amplifiers, Bridge Amplifiers



Temperature Measurements
Strain Gauge Amplifiers
Precision Integrators, Test equipment
(Released / Sampling / Preview)
Packaging options:
Single: SC-70, SO-8, SOT-23
Dual: SO-8, MSOP-8
Quad: SO-14, TSSOP-14
TIPD128: Capacitive Load Drive Solution using an Isolation Resistor
OPAx172: OPA172 | OPA2172 | OPA4172
• Why were these parts developed?
– The OPAx172 was for customers who needed a cost competitive high
bandwidth on wide supply 36V mid performance general purpose op amps.
– The OPAx172 family (10MHz) is an extension of the OPAx170 (1MHz) and
OPA171 (3MHz) families.
• Why is this part so great?
– Performance/price value: This economical family has wide bandwidth, low
offset/drift, low bias current and low noise specifications in the smallest
packaging for a 36V op amp.
• Why is this part better than the competition?
–
–
–
–
Lower power consumption for high bandwidth (10MHz)
Lower offset/drift and bias current
Higher output drive (75mA)
Smallest package for single channel (SC-70)
2
Wide Supply, Low Noise Op-Amps Portfolio
Competitive Analysis
Part Number
Channels
Supply (V)
VIO (max) (mV)
Offset Drift (max)
(μV/C)
Iq/ch (max) (mA)
Ib (max) (nA)
Isc (typ) (mA)
GBW (typ) (MHz)
Slew Rate (typ)
(V/μs)
Vn @1kHz (typ)
(nV/rtHz)
RRI
RRO
Temp Range (C )
Packages
OPAx172
1/2/4
4.5-36
1
AD8510/2/3
(A/B grade)
1/2/4
9-36
1/0.4
ADA4001-2
2
10-36
1.5
ADA4610-2
A/B
2
9-30
1/0.4
ADA4000-1/2/4
1/2/4
8-36
1.7
MC33178/9
2/4
4-36
3
MC33272A/4A
2/4
3-36
1
LT1498/9
2/4
2.2-36
0.475
1.5
1.8
0.015
75
10
12/5
2.5
0.08
70
8
2 (typ)
1.65
0.04
28
5
5 (typ)
3
0.02
50
16.7
8/4
1.85
0.025
63
15.4
2 (typ)
1.4
500
80
5
2 (typ)
2.75
650
37
24
2.5
2.2
650
19
10.5
10
20
20
25
25
2
10
4
6
Yes^
Yes
-40 to 125
10
No
No
-40 to 125
16
No
No
-40 to 125
7.7
No
Yes
-40 to 125
7.3
No
Yes
-40 to 125
7.5
No
No
-40 to 85
18
No
No
-40 to 85
12
Yes
Yes
-40 to 125
S: SC70/5,
SOT23/5,
SOIC/8
D: MSOP/8,
SOIC/8
Q: TSSOP/14,
SOIC/14
S: MSOP/8,
SOIC/8
D: SOIC/8,
MSOP/8
Q: SOIC/14,
TSSOP/14
S: TSOT/5,
SOIC/8
D: SOIC/8,
MSOP/8
Q: SOIC/14,
TSSOP/14
D: LFCSP/8,
MSOP/8,
SOIC/8
D: SOIC/8,
PDIP/8, Micro/8
Q: SOIC/14,
PDIP/14,
TSSOP/14
D: SOIC/8,
PDIP/8
Q: SOIC/14,
PDIP/14
D: PDIP/8,
SOIC/8
Q: SOIC/14
D: SOIC/8
4
Success Stories: OPA172
RF Communication
Where We Won
Who: RF Communication
What: OPA172
Where: First Responder Radios
(Fire, Police, Ambulance)
Volume: 250kU/Y (5 sockets @ 50kU/Y)
How We Won
Application requires an opamp that can
handle high capacitive loads, run from a
single high voltage rail >= +24V, SC70 or
smaller package and GBW > 5MHz. OPA171
fell short of the BW requirement. Customer
tested OPA172 and performance met their
needs. OPA172 made its way to the initial
prototypes. Performance & pre-production
sample support helped with the DWIN.
Who do I sell the OPAx172 to?
Consumer /
Medical
Industrial
Test
Equipment
Automotive
Audio
Example
Applications
Example
Applications
Example
Applications
Example
Applications
Example
Applications
• Washing
machine
• CO2 scanner
• Medical scanner
• Transducer
Amplifier
• PLC Analog I/O
• Solar Inverters
• ADC buffer
• Current sensing
• e-bike
• Mixers
• Pre-amp
Key differentiators:
• GBW/Power performance suitable for portable instruments
• High output current suitable for Audio
• General purpose precision/price
Discovery Questions
• What is the supply voltage?
• What is the required bandwidth?
• What is the required offset voltage?
• What sort of DC precision (drift, bias) requirements do you have?
• Is a combination of low voltage and current noise floor (broadband,
white noise) preferred?
• Is there a need for high output current (audio applications)?
• Any space constraints that need small package?
TIPD128
Capacitive Load Drive Using an Isolation Resistor
Features
Benefits

Supply Voltage: 30V (±15V)

Capacitive Loads: 100pF, 1000pF, 0.01µF,
0.1µF, 1µF
 Design can be used to drive a wide variety of
capacitive loads, including cable shields,
reference buffers, MOSFET gates, and diodes

Isolation Resistor Controls Stability

Features the OPA192 High Voltage, Rail-toRail Input/Output, Precision Op Amps, ETrim™ Series Amplifier
Description
This TI Verified Design implements a variety of op
amps driving capacitive loads from 100pF to 1µF
using an isolation resistor. The OPA192 is
highlighted due to its ability to drive large
capacitive loads with small isolation resistors.
TI Information – Selective Disclosure
AVAILABLE @ TI.COM
 The OPA192 is highlighted because it can drive
large capacitive loads using a small isolation
resistor; however, an efficacy analysis of using
other amplifiers is included
 Robust stability analysis to ensure the design
functions as desired in the presence of process
variation and adverse environmental conditions