Transcript Low Offset Voltage | RRIO E-Trim TM Op-amp

OPAy192: OPA192 / OPA2192 / OPA4192
Q: RTM Jun’15
36V | Low Offset Voltage | RRIO E-TrimTM Op-amp
Features
Benefits
• High DC Precision
•True-Analog Precision: Great Vos and drift over
temperature without the use of internally clocked autozero techniques.
• Offset Voltage: 25µV (max)
• Offset Voltage Drift: 0.1µV/°C (typ)
(varies with different pkgs and channels)
• Low Bias Current: 5pA
• Low Noise: 5.5nV/√Hz at 1kHz
• Rail to Rail Input / Output
• 4.5V to +36V or ±2.25V to ±18V
• High CMRR: 120dB
• Short Circuit Current: 65mA
• Fast Response
• GBW: 10MHz, Slew Rate: 20V/µs
• Settling to 0.01% at 5V Step: 1µs
• High Cap Load Drive Capability: 1nF
• Low Quiescent Current: 1.2mA (max)
•True-RRIO to 36V maintains input and output linearity
and low drift over the entire supply range.
•True-Output Drive: Output current and cap-load
enables high stability systems while maintaining high
DC precision
• Wide dynamic range & high throughput into SAR ADC
• Ideal for interfacing with MUXES due to no input diode
clamps
Applications
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Industrial Automation
Test and Measurement
Sensors and control
Multi-channel data acquisition systems
Precision Comparator
(Released / Sampling / Preview)
OPA192 (SO-8, MSOP-8, & SOT23-5)
OPA2192 (SO-8 & MSOP-8)
OPA4192 (TSSOP-14 & SO-14)
TIPD128, 140, 151, 119
OPAy192 TI Precision Design
Design Theory, Methodology, Simulation, Results
Complete Design Detail
Simulation
Measured Results
TI Confidential – NDA Restrictions
2
Low Offset, Wide Supply Voltage Op-Amps
1 2 4
150
OPA209
1
150µV, 2.5mA
36V, 1 μV/˚C Drift
OPA827
1 2 4
OPA727
150µV, 6.5mA
12V, 20MHz GBW
150µV, 5.2mA
36V, 4nV/√Hz
1
OPA728
150µV, 6.5mA
12V, 0.3 μV/˚C Drift
125
1 2 4
OPA140
120µV, 2mA
36V, 0.35 μV/˚C Drift
1 2 4
Offset Voltage : VOS max (μV)
100
1 2 4
OPA2180
75µV, 525µA
36V, 0.1 μV/˚C Drift
OPA227
75µV, 3.8mA
36V, 0.1 μV/˚C Drift
1 2
50
1 2 4
OPA2188
25µV, 510µA
36V, 0.03 μV/˚C Drift
1 2 4
OPA277
20µV, 825µA
36V, 0.1 μV/˚C Drift
1 2
5
OPA211
50µV, 4.5mA
36V, 1.1nV/√Hz
1 2 4
25
TLE2027
100µV, 5.3mA
38V, 2.5nV/√Hz Noise
100µV, 300µA
36V, 0.5 μV/˚C Drift
1 2 4
75
1
OPA234
1
OPA192
25µV, 1.2mA
36V, 0.1 μV/˚C Drift
OPA177
25µV, 2mA
36V, 0.1 μV/˚C Drift
OPA734
5µV, 750µA
12V, 0.01 μV/˚C Drift
1
OPA735
1
5µV, 750µA
12V, 0.01 μV/˚C Drift
Zero-drift
TLC2652A
1µV, 2.4mA
16V, 0.003 μV/˚C Drift
1
2
3
1 2 4
4
Supply Current: Iq max (mA/ch)
5
6
Channel Count Versions
7
EXISTING
NEW
ROADMAP
OPAy192: OPA192 / OPA2192 / OPA4192
36V | Low Offset Voltage | RRIO E-TrimTM Op-amp
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Features
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Discovery
Questions
Pricing &
Availability
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True Analog Precision
Very low offset (5µV, typ) and drift (0.1µV/°C, typ) that enables high performance
data acquisition for the highest accuracy in test and measurement.
No like existing op amps, the OPAx192 realizes the high DC precision without
auto-zero topology. By avoiding internal clocking impact, the OPAx192 has a low
voltage noise of only 5.5nV/√Hz at 1kHz and low THD+N of 0.00008% at 1kHz.
Rail to Rail Input / Output
The only 36-V RRIO device of this kind, maintains input and output linearity and
low drift over the entire supply range.
No back-to-back diodes makes it ideal for multiplexer applications.
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True-Output Drive
High Output current (up to 65mA) and cap-load (up to 1nF) enables high stability
systems while maintaining high DC precision
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Fast Response
Wide GBW (10MHz) with only 1.2mA quiescent current
High slew rate: 20V/µs
Settling to 0.01% at 5V Step: 1µs
OPAy192: OPA192 / OPA2192 / OPA4192
36V | Low Offset Voltage | RRIO E-TrimTM Op-amp
What is the supply voltage?
Features
What sort of DC precision (Vos, drift, bias) requirements
do you have?
What are the required bandwidth and slew rate?
Discovery
Questions
Pricing &
Availability
Is a combination of low voltage and current noise floor
(broadband, white noise) preferred?
Are you using a multiplexer interfacing with the amp?
Is your application requiring high output current and cap
load capability?
OPAy192: OPA192 / OPA2192 / OPA4192
36V | Low Offset Voltage | RRIO E-TrimTM Op-amp
• Pricing 1Ku
Features
– $1.35 (Single)
– $2.16 (Dual)
• Availability
Discovery
Questions
– Product Folder: Now
– Samples: Now
– Datasheet: Now
Pricing &
Availability
– Reference Designs: TIPD128, TIPD119, TIPD140, TIPD151
– Blogs: A new era for CMOS amplifiers, Time for a trim?
OPAy192 vs. competition
Specificati
on
OPAx192
AD8675
AD8671/2/4
LT1678
LT1677
ISL28127
ADA4177
Abs max Vsup
40V
±18V
36V
±18V
±22V
42V
36V
Vos (max)
25µV
75µV
75µV
150µV
60µV
70µV
60µV
0.5µV/°C
0.6µV/°C
0.7µV/°C
3µV/°C
2µV/°C
0.5µV/°C
1µV/°C
20pA
2nA
12nA
20nA
20nA
10nA
1nA
UGF
10MHz
10MHz
10MHz
20MHz
7.2MHz
10MHz
3.5MHz
Slew Rate
20V/µs
2.5V/µs
4V/µs
6V/µs
2.5V/µs
3.6V/µs
1.5V/µs
1/f Noise
1.3uVp-p
0.1uVp-p
0.077uVp-p
0.09uVp-p
0.09uVp-p
0.085uVp-p
0.175uVp-p
Noise
5.5nV√Hz
2.8nV/√Hz
2.8nV/√Hz
3.9nV/√Hz
3.2nV/√Hz
2.5nV√Hz
8nV√Hz
RRI
YES
NO
NO
YES
YES
NO
NO
RRO
YES
YES
NO
YES
YES
NO
YES
Iq
1.2mA
2.5mA
3mA
2.5mA
2.6mA
2.2mA
0.58mA
Isc
65mA
35mA
30mA
35mA
35mA
45mA
25mA
1nF
10nF
2nF
150pF
1nF
2nF
1nF
-40C to 85C
-40C to 85C
-40C to 125C
-40C to 125C
$2.93
$2.30
$1.05
Vos Drift
(max)
Ibias (max)
Cap Load
Temp range
-40C to 125C -40C to 125C -40C to 125C
Price (1K)
Single : $1.35
$1.18
$1.06
Success Stories: OPAy192
Railway Industry- Signal Monitoring
Where We Won
Who: Electrical Sensors Manufacturer
What: OPA192
Where: Signal monitoring
Volume: 1M/Y
How We Won
Application requires precision amplifiers with
no internal diodes, and low offset (Vos <
1mV). The OPAx192 uses a unique input
architecture to eliminate the need for input
protection diodes but still provides robust
input protection under transient conditions.
Also the OPAx192 offers outstanding dc
precision with low offset (±25 μV, max) and
low offset drift (±0.1 μV/°C, typ).
OPA192 Provides Full 36-V
Differential Input Range
Conventional Input Protection
Limits Differential Input Range
Success Stories: OPAy192
Sensor Signal Conditioning
Where We Won
Who: Scientific Instruments Customer
What: OPA192 and OPA2192
Where: Clinical Lab Equipment and Analytical
Instruments
Volume: 100ku/yr
How We Won
The OPA192 provided excelled DC Offset and
Drift specification required for front end signal
conditioning. “The part performed extremely
well our proto board build and the CMRR vs
Frequency was excellent.” The TI-Design
released alongside was helpful for them to
build their proto board and avoided multiple
revisions.
TIPD119
Combined Voltage/Current Output Terminal for Analog Outputs in Industrial Applications
Features
Benefits

Single Terminal, Standard Voltage or Current
Output for a Universal Analog Output Module

16-bit Resolution
 A combined voltage/current output succeeds in
reducing wiring costs and connector counts
while increasing the versatility of the AO design

<0.1% TUE (%FSR) 0-24mA Current Output
Precision

<0.1% TUE (%FSR) ±10V Voltage Output
Precision

4kV
Digital
ISO7641FC
Galvanic
Isolation
Using
Description
Using the DAC8760 with the OPA192, a combined
voltage and current output terminal for analog
outputs in industrial applications is designed,
featuring a single two-terminal output connector for
both the voltage/ current outputs and <0.1% total
unadjusted error (TUE) for precision applications.
AVAILABLE @ TI.COM
 Wide variety of voltage/current output ranges,
along with voltage over-ranges, provides the
necessary functionality for a wide range of apps
 Discrete onboard solution – DAC8760 –
includes most necessary components to create
a configurable integrated solution for industrial
voltage and current output drivers
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.
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
TIPD140
Single Op-Amp Slew Rate Limiter
Features
Benefits

Component Programmable Slew Rate

20V/µs to 20V/s Slew Rate
 Merely one additional op amp stage can provide
slew rate control for a given analog gain stage

Dual or Single Supply Use

Control the Rise/Fall of Op Amp Output

Input Frequency Range: 0-250MHz

Comprehensive Stability Analysis
Description
This TI Reference Design demonstrates how a
single op amp can be used as a slew rate limiter.
By controlling the slew rate of the command
voltages into applications such as valve or motor
drive circuits, the load voltages can ramp up and
down at a safe rate, avoiding mechanical damage.
AVAILABLE @ TI.COM
 Design specifications avoid the common mode
voltage transition region inherent in most rail-torail, two-input-stage op amps
 Well-suited for applications involving abrupt
changes in voltages or currents e.g. control
systems for valves or motors
TIPD151
Multiplexed Data Acquisition for High Voltage Inputs | 16-bit | 400KSPS | 4-Ch
Features
Benefits

4-Channel, High-Voltage (±20V), Multiplexed,
Data Acquisition System

Sampling Rate: 400kSPS (100kSPS/Ch)
 Design is optimized for low distortion and noise
using the high resolution ADS8864 at its
maximum sampling rate

INL: ±1LSB

ENOB: 14.2

16 Bit, Full Scale, Channel-to-Channel Settling

Excellent Dynamic Performance, Low Power
SAR ADC – ADS8864
 Onboard MUX was selected for a its low drain
capacitance, ensuring its channel switching
time meets the design’s resolution requirements
Description
This TI Verified Design implements a 16-bit,
differential, 4-channel, multiplexed DAQ system at
400KSPS throughput for high voltage differential
input industrial applications, as well as optimizes
the precision high voltage front end drive circuit to
achieve excellent dynamic performance.
AVAILABLE @ TI.COM
 Block-level circuit analysis provides many
opportunities for design improvements or
modifications for a variety of applications