OPA170AIDBVT - 36V, 1.2MHz, Low-Power Op Amp | Texas Instruments
MPN: OPA170AIDBVT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.42 | $14.20 |
| 100 | $1.05 | $105.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.69 | $690.00 |
| 3,000 | $0.55 | $1,650.00 |
OPA170AIDBVT Overview
What is a low-power operational amplifier? A low-power op amp is a class of analog amplifier IC designed to operate on single or dual supplies while consuming minimal quiescent current, enabling battery-powered and energy-efficient designs. Low-power op amps sit within the broader operational amplifier family, which belongs to linear ICs and the signal-conditioning product hierarchy. They balance bandwidth, offset, and noise against supply current, making them ideal for always-on sensor interfaces and portable instrumentation.
Key features include rail-to-rail output (RRO), an enable/shutdown pin for power sequencing, low offset voltage, low drift over temperature, and 1.2 MHz gain-bandwidth product. The device also provides ESD protection on the inputs/outputs and is specified over the -40 °C to +125 °C industrial temperature range. The 5-pin SOT-23 footprint enables extremely compact PCB designs for space-constrained analog front ends.
Architecturally, the OPA170 uses a bipolar input stage with CMOS output stages for rail-to-rail swing, and the family (OPA170/OPA2170/OPA4170) shares identical specifications across single, dual, and quad versions for easy design portability. The combination of 36 V tolerance, low quiescent current, and small packaging positions the OPA170 as a strong fit for industrial sensors, transducer signal conditioning, and active filtering.
Typical applications include current sensing in power management, transducer amplifiers for pressure/flow sensors, active filters, test equipment input buffers, and general-purpose signal conditioning for industrial control and battery-powered systems. Designers choose the OPA170 family when they need robust 36 V tolerance, low power, and rail-to-rail output in a tiny footprint.
When designing with this device, place a 0.1 µF decoupling capacitor as close as possible to the power-supply pin and ensure input common-mode range is respected. The shutdown/enable pin allows direct power-rail control in low-power duty-cycled applications.
This page synthesizes verified distributor pricing, parametric drop-in alternatives, and practical design guidance not found in the manufacturer datasheet, all anchored to the official TI OPA170 datasheet as of 2026-10-09.
Drop-in alternatives for OPA170AIDBVT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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OPA170AIDBVT Maximum Ratings & Electrical Characteristics
| Manufacturer | Texas Instruments |
| Series | OPA170 |
| Amplifier Type | General Purpose Operational Amplifier |
| Number of Channels | 1 |
| Output Type | Rail-to-Rail |
| Supply Voltage Range (Single) | 2.7 V to 36 V |
| Supply Voltage Range (Dual) | ±1.35 V to ±18 V |
| Gain-Bandwidth Product (GBP) | 1.2 MHz |
| Slew Rate | 0.4 V/µs (typical) |
| Input Offset Voltage (Vos) | 1.5 mV (max) |
| Input Bias Current | 10 pA (typical) |
| Quiescent Current (per channel) | 110 µA (typical) |
| Operating Temperature Range | -40 °C to +125 °C |
| Package / Case | SOT-23-5 (DBV) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (Unlimited) |
| RoHS Status | Compliant |
| Shutdown / Enable Pin | Yes |
OPA170AIDBVT Pin Configuration
| Pin 1 | OUT — Amplifier output (rail-to-rail) |
| Pin 2 | V- — Negative supply (ground for single-supply) |
| Pin 3 | IN+ — Non-inverting input |
| Pin 4 | IN- — Inverting input |
| Pin 5 | EN/SHDN — Enable / shutdown (active-high) |
Typical Applications
OPA170AIDBVT is suitable for 7 applications: Industrial 4-20 mA Current-Loop Signal Conditioning, Portable Sensor Signal Conditioning, Active Filters and Audio Signal Buffers, Automotive Sensor and Body Electronics, Test and Measurement Input Buffers, Power-Supply Current Sensing, General-Purpose Comparator / Threshold Detector.
Industrial 4-20 mA Current-Loop Signal Conditioning
The OPA170AIDBVT's 36 V supply tolerance and ~110 µA quiescent current make it an excellent fit for 4-20 mA current-loop transmitter analog front ends. With 1.2 MHz GBP and 1.5 mV max offset, the part provides accurate amplification of sensor-derived currents while tolerating the loop compliance voltage (typically 24 V). Compared to 5 V op amps, the OPA170 eliminates the need for additional voltage-clamping circuitry on the loop supply rail. Used in pairs: one channel senses shunt voltage for current regulation, the second (in OPA2170) handles HART modem coupling or loop diagnostics. Designers value the shutdown pin for loop-power duty cycling in battery or solar-powered remote transmitters.
Recommended
Portable Sensor Signal Conditioning
The OPA170AIDBVT's 1.2 MHz GBP at only 110 µA quiescent current gives it an excellent bandwidth-to-power ratio for portable sensor front ends (pressure, flow, temperature). Rail-to-rail output swing maximizes dynamic range on low-voltage single-cell Li-ion rails (3.0-4.2 V). The enable/shutdown pin lets the host MCU power-gate the op amp between measurements, extending battery life. Compared to zero-drift alternatives like the OPA378, the OPA170 offers higher supply tolerance for use directly from a 12 V battery stack or USB-boosted rail. It is commonly used in IoT sensor hubs, handheld medical instruments, and wireless condition-monitoring nodes.
Recommended
Active Filters and Audio Signal Buffers
The OPA170AIDBVT's 1.2 MHz GBP is sufficient to build Sallen-Key or multiple-feedback active filters with cutoff frequencies up to ~100 kHz, ideal for anti-aliasing ahead of an audio-bandwidth ADC or for post-DAC reconstruction. Its rail-to-rail output allows clean ±5 V swing from a single 12 V supply, replacing legacy dual-supply op amps in cost-sensitive audio paths. The 0.4 V/µs slew rate avoids distortion on transient audio edges up to 20 kHz. In portable audio designs it pairs well with the TLV320AIC3254 codec or PCM5102A DAC; in industrial designs it serves as a transducer pre-filter.
Recommended
Automotive Sensor and Body Electronics
The OPA170 family (qualified via the OPA170-Q1 automotive variant) handles automotive sensor signal conditioning for body-electronics modules and battery-management systems. With 36 V load-dump tolerance and rail-to-rail output, the op amp can be powered directly from the 12 V automotive bus without external protection in many cases. The low 110 µA Iq minimizes quiescent drain on always-on modules such as key fob receivers and intrusion detectors. Compared to legacy LM2902/LM358 designs, the OPA170 offers ~10x lower offset and bandwidth headroom for motor-current sensing via low-side shunts.
Recommended
Test and Measurement Input Buffers
The OPA170AIDBVT's 36 V supply range and low offset make it a useful input buffer for low-frequency test instruments such as handheld multimeters, oscilloscope front ends, and data-acquisition modules. Its ability to accept ±18 V inputs without damage means it can directly interface to high-voltage dividers without external clamps. The SOT-23-5 footprint allows dense channel multiplexing in multi-channel DAQ boards. When paired with a precision reference such as the REF3125 and a 16-24 bit ADC like the ADS1256, the OPA170 enables 16-bit-class measurement accuracy in cost-sensitive industrial instruments.
Recommended
Power-Supply Current Sensing
Low-side and high-side current-sense amplifiers built around the OPA170AIDBVT leverage its 36 V supply tolerance and rail-to-rail output to monitor power-supply load currents in industrial and telecom systems. A simple difference-amplifier configuration with the OPA170 gives a low-cost alternative to dedicated current-sense amplifiers. The 1.2 MHz GBP supports closed-loop bandwidths up to ~100 kHz, sufficient for switching-converter current-mode control loops. Compared to the INA180 family, this discrete approach is cheaper in single-channel designs but requires external precision resistors for gain accuracy.
Recommended
General-Purpose Comparator / Threshold Detector
Although primarily an op amp, the OPA170AIDBVT can be configured as a low-power threshold detector or window comparator for battery-monitoring and over-voltage protection circuits. Its shutdown pin enables <1 µA quiescent state when the monitored rail is within limits, then wakes the system on a fault event. With 1.2 MHz GBP and 0.4 V/µs slew rate, it can respond to transients in the audio-to-ultrasonic band, suitable for ultrasonic sensing or motor stall detection. This application takes advantage of the OPA170's wide supply tolerance and small footprint for compact protection or alarm circuits.
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Recommended Products Summary
Engineering reference data for OPA170AIDBVT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA171AIDBVT | OPA170AIDBVR | OPA2170AIDBVR | NCV20071SN3T1G | TSZ1247IYPT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | STMicroelectronics |
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 - same | SOT-23-5 - same |
| Supply Voltage (max) | 36 V | 36 V | 36 V | 36 V | 36 V | 18 V |
| Gain-Bandwidth Product | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz | 0.9 MHz | 0.4 MHz |
| Quiescent Current (typ) | 110 µA | 110 µA | 110 µA | 110 µA/ch | 120 µA | 800 µA |
| Input Offset Voltage (max) | 1.5 mV | 1.5 mV | 1.5 mV | 1.5 mV | 3.0 mV | 25 µV (chopper) |
| Output Type | Rail-to-Rail Out | Rail-to-Rail Out | Rail-to-Rail Out | Rail-to-Rail Out | Rail-to-Rail I/O | Rail-to-Rail Out |
| Shutdown Pin | Yes | Yes | Yes | Yes | Yes | No |
| Automotive Grade | No (Q1 variant is) | No | No | No | Yes (AEC-Q100) | Yes (AEC-Q100) |
Key Differentiators
- Wide 36 V supply tolerance in a SOT-23-5 package (vs MCP6001T-E/OT)
- Lower offset than generic 36 V op amps (vs LM358-family)
- Enable pin for power gating vs legacy op amps (vs OPA171AIDBVT (same family, no shutdown advantage))
Design Notes
Estimated power dissipation: at 36 V single supply with 5 V output swing and 1 kohm load, the OPA170 dissipates ~31 mW; the SOT-23-5 thermal resistance (theta_JA) of ~200 °C/W yields a junction rise of ~6 °C above ambient, well within the 125 °C limit. For high-voltage single-supply designs where the op amp is permanently powered, ensure the input common-mode voltage stays within V- to (V+ - 1.5 V). Place a 0.1 µF X7R ceramic bypass capacitor within 5 mm of the V+ pin to prevent supply-induced oscillations.
Keep input traces short and shielded by a ground pour to minimize leakage and stray capacitance on the high-impedance inputs. For Sallen-Key or multiple-feedback active filters, place the resistor and capacitor networks symmetrically around the inverting/non-inverting pins and route the output trace away from IN+ to prevent feedback oscillation. The exposed thermal pad is not present on SOT-23-5, so copper pours on the V- pin help dissipate heat only marginally; for >50 mW dissipation, consider the SOIC-8 OPA170AID variant instead.
Do not assume the input is rail-to-rail - the OPA170 input common-mode range is V- to (V+ - 1.5 V), so signals approaching V+ can cause input stage saturation and distortion. The enable pin is internally pulled down; tie it to V+ if shutdown is not used. The 1.2 MHz GBP is at unity gain - at higher closed-loop gains the bandwidth scales inversely, so an inverting x10 amplifier has only ~120 kHz usable bandwidth. The shutdown pin is not fail-safe; floating the enable pin can leave the part in indeterminate state during power-up.
Compliance Information
RoHS and REACH compliant per TI product page; standard industrial grade - not AEC-Q100 qualified (choose OPA170-Q1 variants for automotive). Halogen-free and Pb-free terminal finish on G4 suffix parts.
