Texas Instruments TS321IDBVR

Overview

TS321IDBVR from Texas Instruments is a low-power, single-channel bipolar operational amplifier in a 5-pin SOT-23 package, supporting single-supply operation from 3 V to 30 V or dual supplies from ±1.5 V to ±15 V. It delivers 0.8 MHz gain bandwidth, 0.4 V/µs slew rate, and rail-to-rail output swing up to 3.5 V (V_CC = 5 V), making it suitable for space-constrained signal conditioning in consumer and industrial electronics.

For engineers reviewing the TS321IDBVR datasheet, TS321IDBVR pinout, TS321IDBVR application, or TS321IDBVR equivalent, key selection considerations include its 500 µA typical supply current, 20 nA input bias current, wide common-mode input range (0 V to V_CC+ – 1.5 V), stability with high capacitive loads, and operation across –40°C to +125°C.

Technical Context

The TS321IDBVR implements a classic bipolar input stage with complementary NPN/PNP differential pair architecture, enabling stable DC performance and predictable AC behavior. Its internal compensation ensures unity-gain stability without external components, even with ≥1 µF capacitive loads on the output.

It operates in standard op-amp configurations-noninverting, inverting, comparator, and voltage follower-with input common-mode range extending to ground and within 1.5 V of V_CC+. The device lacks rail-to-rail input capability but tolerates inputs up to the absolute maximum supply voltage (32 V) without damage.

Key Specifications

Pinout & Package

TS321IDBVR uses the 5-pin SOT-23 (DBV) package, measuring 2.90 mm × 1.60 mm × 1.45 mm (max height), optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with LMV321IDBVR and TLV2461CDBVR, TS321IDBVR offers the lowest supply current among the three while maintaining robust bipolar input performance and proven stability with capacitive loads - making it optimal for cost-sensitive, low-power industrial signal chains where precision beyond 4 mV offset is not required.

Availability

TS321IDBVR is available at Aetrix Electronics and suitable for HVAC control systems, refrigerator sensor interfaces, and portable media player audio circuits requiring stable component supply, extended temperature operation, and compact packaging.

Supply support for TS321IDBVR 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, embedded processing, and connectivity technologies, with decades of expertise in high-reliability op-amp design and manufacturing.

The TS321IDBVR belongs to TI's general-purpose bipolar op-amp product line, engineered for cost-sensitive, space-constrained applications in consumer, industrial, and appliance markets where low power, wide supply range, and ease of use are prioritized.

FAQ

What is the maximum capacitive load the TS321IDBVR can drive while remaining stable?

The TS321IDBVR is specified as stable with output capacitive loads up to and exceeding 1 µF, including 10 µF, without external compensation. This is confirmed in the datasheet's Feature Description section (7.3.5) and Typical Characteristics (Figure 7), where small-signal response shows acceptable phase margin even at 10 µF. For TS321IDBVR, this eliminates the need for isolation resistors in filter or EMI-suppression designs.

Does the TS321IDBVR support rail-to-rail input operation?

No, the TS321IDBVR does not support rail-to-rail input. Its common-mode input voltage range is specified from 0 V to (V_CC+ – 1.5 V) at 25°C, and down to (V_CC+ – 2 V) across temperature. Inputs may exceed V_CC+ up to 32 V without damage, but correct output phase requires at least one input to remain within the valid common-mode range. TS321IDBVR is a bipolar-input amplifier, not a CMOS RRI op-amp.

What is the minimum recommended supply voltage for reliable operation of the TS321IDBVR?

The TS321IDBVR is fully specified to operate down to 3 V single supply (or ±1.5 V dual supply). At 3 V, it maintains functional output swing, input common-mode range, and 500 µA typical supply current. Datasheet Section 6.3 confirms V_CC min = 3 V under Recommended Operating Conditions, and Figure 2 (Supply Current vs Temperature) validates stable ICC down to 3 V across –40°C to +125°C.

Can the TS321IDBVR be used in a dual-supply configuration with asymmetric rails?

Yes, the TS321IDBVR supports asymmetric dual supplies - for example, +12 V and –5 V - as long as both rails fall within the absolute maximum ratings (±16 V) and the total supply voltage (V_CC+ – V_CC–) does not exceed 32 V. The device's functional specifications (e.g., input range, output swing) reference V_CC– as the ground reference, so design calculations must use the actual negative rail as the 0 V baseline. This flexibility is explicitly supported in Section 7.4 (Device Functional Modes).

Is there an automotive-grade version of the TS321IDBVR?

Yes, the TS321-Q1 is the AEC-Q100 qualified automotive variant of the TS321 family. It shares identical electrical specifications and pinout with TS321IDBVR but undergoes additional qualification testing for high-reliability automotive applications, including extended temperature screening (–40°C to +125°C), enhanced ESD robustness, and zero-defect manufacturing controls. TS321-Q1 is documented in TI's "Other Qualified Versions" addendum and is the recommended choice for engine control, body electronics, and ADAS subsystems.