INA214AIDCKR-Q1 - 26V Bi-Dir Current Sense Amp, SC-70-6 | TI
N.º da peça: INA214AIDCKR-Q1 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1 | $1,00 |
| 10 | $1 | $10,00 |
| 100 | $1 | $100,00 |
| 500 | $1 | $500,00 |
| 1.000 | $1 | $1.000,00 |
INA214AIDCKR-Q1 Visão geral
A current sense amplifier is a specialized differential amplifier optimized to measure the small voltage developed across a shunt resistor, converting it into a ground-referenced output voltage proportional to load current. It sits within the signal chain hierarchy: shunt monitor -> instrumentation amplifier -> special-purpose amplifier IC -> analog front end.
Key features include the zero-drift architecture, which delivers very low offset voltage (±35 uV maximum across the INA21x family per TI datasheet) and near-zero offset drift, enabling use of very small shunt resistors that reduce power loss. The bi-directional output supports monitoring both charge and discharge currents via a reference pin, making it well suited for battery management. Operation over the automotive temperature range and AEC-Q100 qualification distinguish the -Q1 version from the standard INA214AIDCKR.
The zero-drift topology uses auto-zeroing to suppress 1/f noise and offset, so DC accuracy is maintained without system-level calibration. The SC-70-6 footprint places IN+, IN-, VREF, OUT, GND, and VS in an area of approximately 2.0 mm x 2.1 mm, enabling placement directly adjacent to the shunt for Kelvin connections and minimal parasitic drops.
Typical applications include automotive battery pack current monitoring, 24 V and 12 V rail overcurrent protection, telecom base station power supervision, closed-loop current control in motor drives and DC-DC converters, and system optimization power meters. In battery systems, the reference pin offsets the output so charge and discharge currents map to distinct output levels.
For best accuracy, connect the amplifier inputs directly across the shunt using Kelvin routing, and place the reference divider close to the VREF pin. Select a shunt value so maximum load current generates a sense voltage within the input range while keeping shunt power dissipation acceptable.
Alternativas drop-in para INA214AIDCKR-Q1 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com INA214AIDCKR-Q1 (mesmo formato e footprint) — diferindo em Channels, Package.
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INA214AIDCKR
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INA210AIDCKR-Q1
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INA214AIDCKR-Q1 Classificações máximas e características elétricas
| Product Type | Current shunt monitor (current sense amplifier) |
| Canais | 1 (single-ended output) |
| Gain (INA214) | 100 V/V |
| Common-Mode Voltage Range | -0.3 V to 26 V |
| Input Configuration | High-side or low-side, bi-directional |
| Offset Voltage | ±35 uV (maximum, INA21x family) |
| Architecture | Zero-drift (auto-zeroing) |
| Reference Pin (VREF) | Yes, enables bi-directional current monitoring |
| Encapsulamento | SC-70-6 (DCK) |
| Tipo de montagem | Surface Mount |
| Qualification | AEC-Q100 (automotive) |
| Status RoHS | Compliant |
| Typical Applications | Overcurrent protection, precision current measurement, closed-loop feedback |
Configuração de pinos do INA214AIDCKR-Q1
| Pino 1 | IN+ — Shunt high-side sense input |
| Pino 2 | GND — Ground |
| Pino 3 | VREF — Reference input for bi-directional output offset |
| Pino 4 | OUT — Analog voltage output proportional to shunt current |
| Pino 5 | VS — Power supply input |
| Pino 6 | IN- — Shunt low-side sense input |
Aplicações típicas
INA214AIDCKR-Q1 é adequado para 6 aplicaçãos: Automotive Battery Current Monitoring, Overcurrent Protection, Telecom Base Station Power Supervision, Closed-Loop Motor Drive Current Control, DC-DC Converter Current-Mode Feedback, Solar and IoT Power Optimization.
Automotive Battery Current Monitoring
The INA214AIDCKR-Q1's AEC-Q100 qualification and -0.3 V to 26 V common-mode range make it a natural fit for 12 V automotive battery sense lines. Placed across a milliohm shunt in the negative or positive battery path with the VREF pin driven from a rail divider, it produces a ground-referenced output that distinguishes charge from discharge current. The zero-drift architecture keeps offset error negligible even after years of temperature cycling in the engine bay.
Recomendado
Overcurrent Protection
For overcurrent protection on 24 V industrial and telecom rails, the INA214AIDCKR-Q1 amplifies a small shunt drop by 100 V/V into a comparator-friendly output. Its common-mode range tolerates fault transients up to 26 V, and the fast voltage-output response lets a comparator or MCU ADC trip within microseconds. Unlike hall sensors, the shunt-based approach needs no supply-side isolation and exhibits no magnetic hysteresis, so trip thresholds remain stable over life.
Recomendado
Telecom Base Station Power Supervision
Telecom -48 V and 24 V distribution boards benefit from the INA214's supply-independent 26 V common-mode rating, meaning the shunt can sit on a high-voltage rail while the amplifier runs from a 5 V logic supply. The zero-drift input stage delivers the DC precision needed for amp-hour consumption accounting, and the SC-70-6 footprint fits dense power-entry card layouts where board area is scarce.
Recomendado
Closed-Loop Motor Drive Current Control
In brushed and BLDC motor controllers, the INA214AIDCKR-Q1 senses low-side phase or rail current for torque-loop feedback. The 100 V/V gain suits 5 mOhm to 20 mOhm shunts typical of 10 A to 30 A drives, while the zero-drift topology prevents offset-induced torque ripple at light load. Designers should verify bandwidth against PWM ripple frequency and, for aggressive dv/dt, consider the INA240A1QPWRQ1 with enhanced PWM rejection.
Recomendado
DC-DC Converter Current-Mode Feedback
The INA214AIDCKR-Q1 provides averaged inductor current feedback for controllers requiring an external current sense amplifier. Its wide common-mode range supports boost, SEPIC, and high-side buck sensing where the shunt rides on the switching node rail. The low offset (±35 uV family maximum) preserves light-load current-loop accuracy, improving transient response and limiting current accuracy in applications such as the LM5117-based controllers.
Recomendado
Solar and IoT Power Optimization
Solar charge controllers and battery-powered IoT nodes use the INA214AIDCKR-Q1 for precision energy accounting. The very low offset enables measurement of microamp to milliamp sleep currents when paired with a larger shunt, while the 26 V common-mode limit covers 12 V and 24 V panel strings. The 6-pin SC-70 package and simple resistor-periphery design keep BOM count low for cost-sensitive high-volume nodes.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para INA214AIDCKR-Q1 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | INA214AIDCKR | INA213AIDCKR-Q1 | AD8418WBRZ-RL |
|---|---|---|---|---|
| Package | SC-70-6 (DCK) | SC-70-6 (DCK) - same | SC-70-6 (DCK) - same | MSOP-8 - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Gain | 100 V/V | 100 V/V | 50 V/V | 20 V/V |
| Common-Mode Range | -0.3 V to 26 V | -0.3 V to 26 V | -0.3 V to 26 V | -2 V to 70 V |
| Qualification | AEC-Q100 (Q1) | Commercial (not Q1) | AEC-Q100 (Q1) | AEC-Q100 automotive |
| Bi-directional Output | Yes (VREF pin) | Yes | Yes | Yes (REF pin) |
Principais diferenciais
- AEC-Q100 automotive qualification (vs INA214AIDCKR)
- Zero-drift offset stability (vs AD8418WBRZ-RL)
- Smallest footprint in the compare set (vs AD8418WBRZ-RL)
Notas de projeto
Route Kelvin connections directly from the shunt resistor pads to IN+ and IN-. Do not share the shunt traces with load current paths, since milliohms of trace resistance becomes tens of millivolts of gain error at high current. Place the INA214AIDCKR-Q1 within a few millimeters of the shunt; the 6-pin SC-70 footprint makes this practical even in dense layouts.
The VREF pin sets the output baseline for bi-directional sensing. Drive it from a low-impedance source such as an op-amp buffer or a precision reference divider; a high-impedance divider directly on VREF will be loaded by the reference input and shift your zero-current reading. Any VREF error passes to the output at unity gain, so budget reference accuracy against your current measurement target.
Keep the shunt drop modest: with gain of 100 V/V, a 50 mV full-scale shunt drop yields 5 V of output, suitable for 5 V ADCs, while 25 mV suits 3.3 V ADCs with headroom. Size shunt power as I^2 x R and derate for thermal rise. The 26 V common-mode limit must never be exceeded even during load-dump or fault transients - add series resistance and clamping on the sense lines in automotive environments.
Informações de conformidade
AEC-Q100 qualification confirmed via TI.com INA214-Q1 product page. RoHS compliance per standard TI packaging; REACH and halogen-free status require TI quality portal confirmation.
