Texas Instruments INA186A1IDCKT

Overview

INA186A1IDCKT from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 25 V/V fixed gain, –0.2 V to +40 V common-mode input range, ±50 µV max offset voltage, and 48 µA typical quiescent current. It enables microamp-level current measurement in battery-powered consumer electronics using SC70-6 packaging.

For engineers reviewing the INA186A1IDCKT datasheet, INA186A1IDCKT pinout, INA186A1IDCKT application, or INA186A1IDCKT equivalent, this page delivers verified specifications, SC70 package terminal mapping, bidirectional sensing context, and validated alternative options for portable power monitoring designs.

Technical Context

The INA186A1IDCKT uses a capacitively coupled front-end architecture to achieve 120 dB minimum CMRR and reject dc common-mode shifts up to ±40 V independent of its 1.7–5.5 V supply. Its zero-drift design maintains ±0.5 µV/°C offset drift and ±1% gain error across –40°C to +125°C.

It supports bidirectional sensing via the REF pin (present in DCK and DDF packages), enabling output centering at user-defined voltages; the ENABLE pin (absent in DCK) is not implemented in this variant, confirming always-on operation without shutdown control.

Key Specifications

Pinout & Package

INA186A1IDCKT is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body), optimized for space-constrained portable PCBs. Pin functions are validated per TI SBOS318B Rev B (Fig 5-1, Table 5-1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA186A1IDCKT, INA219AIDR trades analog bandwidth and REF-based bidirectionality for integrated digitization, while MAX40016AUT+T sacrifices common-mode range and offset performance to reduce unit cost in non-critical sensing roles.

Availability

INA186A1IDCKT is available at Aetrix Electronics and suitable for smartphone battery management, notebook PC power monitoring, and merchant server PSU applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for INA186A1IDCKT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The INA186 product line targets ultra-low-power, high-accuracy current sensing in space-constrained portable and battery-operated systems, emphasizing microamp measurement capability and wide common-mode operation without external level-shifting.

FAQ

What is the maximum common-mode voltage supported by the INA186A1IDCKT?

The INA186A1IDCKT supports a common-mode input voltage range of –0.2 V to +40 V, independent of its 1.7–5.5 V supply voltage. This allows direct high-side sensing on 36-V battery systems and robust operation in noisy switch-mode power supply environments. The specification is guaranteed across –40°C to +125°C and confirmed in TI SBOS318B Section 6.3.

Does the INA186A1IDCKT include an enable pin for power gating?

No, the INA186A1IDCKT does not include an ENABLE pin. That function is only available in DDF (SOT-23-8) and YFD (DSBGA-6) package variants per TI SBOS318B Figure 5-2 and 5-3. The DCK (SC70-6) package used for INA186A1IDCKT operates continuously when powered; its 48-µA quiescent current is the lowest possible state.

How does the REF pin enable bidirectional current sensing in the INA186A1IDCKT?

The REF pin on the INA186A1IDCKT (Pin 1) accepts an external bias voltage that offsets the output: V_OUT = GAIN × (V_IN+ – V_IN–) + V_REF. When V_REF = V_S/2, positive differential inputs raise V_OUT above mid-supply (indicating forward current), while negative differentials pull V_OUT below mid-supply (reverse current). This enables charge/discharge detection in battery applications without polarity-switching circuitry.

What is the typical quiescent current of the INA186A1IDCKT and how does it impact battery life?

The INA186A1IDCKT draws 48 µA typical quiescent current at 25°C, rising to 90 µA maximum across –40°C to +125°C. In a wireless earbud case powered by a 300-mAh Li-ion cell, this translates to >7 years of continuous monitoring before depletion-making it ideal for always-on health monitoring and asset tracking devices where the INA186A1IDCKT provides precision without compromising runtime.

Can the INA186A1IDCKT be used with a 1.8-V supply and still achieve rail-to-rail output swing?

Yes, the INA186A1IDCKT guarantees rail-to-rail output swing down to 1.7 V supply: V_OUT reaches as low as GND +1 mV and as high as V_S –40 mV. At 1.8 V, this delivers a usable 1.76-V output range-sufficient to drive 12-bit SAR ADCs with >4090 effective codes. This performance is validated in SBOS318B Figure 6-4 and specified in Section 6.5 under "Voltage Output".