Texas Instruments OPA2170AIDSGT

Overview

OPA2170AIDSGT from Texas Instruments is a dual-channel, 36-V, rail-to-rail output operational amplifier in an 8-pin WSON (DSG) package. It delivers 1.2 MHz gain bandwidth, 19 nV/√Hz input voltage noise at 1 kHz, 110 µA per amplifier quiescent current, ±15 pA max input bias current, and operates from 2.7 V to 36 V single supply - enabling precision signal conditioning in battery-powered instrumentation and industrial sensor interfaces.

For engineers reviewing the OPA2170AIDSGT datasheet, OPA2170AIDSGT pinout, OPA2170AIDSGT application, or OPA2170AIDSGT equivalent, key selection criteria include its rail-to-rail output swing (within 115 mV of V+ at 1 mA), extended common-mode range (to within 2 V of V+), phase-reversal immunity, low 0.0002% THD+N at 1 kHz, and operation across –40°C to +125°C.

Technical Context

The OPA2170AIDSGT uses a CMOS input stage with RFI-filtered inputs and internal phase-reversal protection, allowing input signals to exceed the positive rail by 100 mV without output inversion. Its architecture supports stable operation with capacitive loads up to 300 pF and maintains 120 dB CMRR at ±18 V supply.

It features dual independent amplifiers sharing one V+ and one V– supply, with fully specified performance across –40°C to +125°C. Input common-mode range extends from (V–) – 0.1 V to (V+) – 2 V for normal operation, and rail-to-rail output swing is guaranteed under load (e.g., 115 mV from V+ at 1 mA sink).

Key Specifications

Pinout & Package

OPA2170AIDSGT is housed in an 8-pin WSON (DSG) package measuring 2.00 mm × 2.00 mm × 0.75 mm, with exposed thermal pad for enhanced power dissipation in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel precision op amp applications.

Compared with OPA2170AIDSGT, OPA2182AIDR trades ultra-low offset and noise for significantly higher power consumption and cost, while LMV358IDR sacrifices voltage range, output swing, and robustness for economy in low-voltage consumer use cases.

Availability

OPA2170AIDSGT is available at Aetrix Electronics and suitable for industrial sensor interfaces, battery-powered instrumentation, and precision analog front-ends requiring stable component supply across extended temperature and voltage ranges.

Supply support for OPA2170AIDSGT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op amps and industrial-grade signal chain solutions.

The OPAx170 series was designed for high-accuracy, low-power, wide-supply-range applications in harsh environments - targeting industrial automation, test equipment, and energy infrastructure where reliability and parametric consistency are critical.

FAQ

What is the maximum supply voltage rating for OPA2170AIDSGT?

The absolute maximum supply voltage for OPA2170AIDSGT is 40 V (V+ to V–), but recommended operating range is 2.7 V to 36 V. Operation above 36 V may degrade long-term reliability and is not characterized. The device remains functional at 36 V with full specification compliance across –40°C to +125°C.

Does OPA2170AIDSGT support rail-to-rail input operation?

OPA2170AIDSGT supports rail-to-rail *output*, but its input common-mode range extends from (V–) – 0.1 V to (V+) – 2 V for normal operation. It can accept inputs up to V+ + 0.1 V with reduced performance - not true rail-to-rail input. This design avoids phase reversal while maintaining precision near the positive rail.

Can OPA2170AIDSGT drive capacitive loads without instability?

Yes - OPA2170AIDSGT is stable driving capacitive loads up to 300 pF, as confirmed in the datasheet's Typical Characteristics (Figure 23–24). For loads >300 pF, external isolation resistance (e.g., 10–50 Ω in series with output) is recommended to maintain phase margin and prevent peaking or oscillation.

What is the thermal performance of OPA2170AIDSGT in its WSON package?

In the DSG (WSON) package, OPA2170AIDSGT has a junction-to-ambient thermal resistance (RθJA) of 71.5°C/W and junction-to-board (RθJB) of 38.8°C/W. With proper PCB copper pour under the thermal pad, it sustains continuous operation at TA = +125°C with ≤150 mW total power dissipation (75 mW per amplifier).

Is OPA2170AIDSGT pin-compatible with other OPA2170 variants?

OPA2170AIDSGT shares identical pin functions with other OPA2170 packages (SOIC-8, VSSOP-8), but the WSON-8 (DSG) footprint differs mechanically. Pin numbering and signal mapping (e.g., Pin 1 = OUT A, Pin 8 = V+) are consistent across all variants - enabling schematic reuse, though PCB layout requires package-specific land patterns.