INA110KU - 2.5 MHz Fast-Settling Amplifier | Texas Instruments
MPN： INA110KU ✓ 啟用中INA110KU 概覽
An instrumentation amplifier is a differential analog signal-conditioning IC that amplifies the voltage difference between two inputs while rejecting common-mode interference. The INA110 belongs to the instrumentation amplifier hierarchy within analog amplifiers and signal-chain ICs. Its current-feedback topology, laser-trimmed input stage, very high input impedance, and low input bias current make it suitable for measuring small differential signals through balanced sensors, bridges, and multiplexed data-acquisition inputs.
Key features include selectable internal gains of 1, 10, 100, 200, and 500 V/V, a stated input offset voltage of 1 mV, and 2.5 MHz bandwidth. The fast 4 us settling time supports systems that change gain or source between measurements quickly. Input filtering and protection can be placed directly at the high-impedance inputs without loading the source, while the 12 V to 36 V supply range supports higher-compliance analog systems.
The current-feedback architecture is intended to provide good dynamic performance while the laser trimming improves gain accuracy and DC behavior. Internal gain-set resistors reduce the number of external components required for fixed-gain designs. Because the device contains FET input stages, it offers very high input impedance and low bias current; this is useful when the source impedance is high or when source resistance differs between the two inputs.
Typical applications include high-speed data acquisition, multiplexed sensor measurement, bridge-amplifier interfaces, current measurement, laboratory instrumentation, and industrial signal conditioning. The 4 us settling time is particularly useful when sequential channels must be measured rapidly, while the internal gain choices cover low-level sensor outputs through higher-amplitude differential signals.
For layout, keep input and feedback connections short, use symmetric routing between the differential inputs, and place input protection or filtering close to the corresponding pins. Check the external feedback-network requirements for each selected gain and confirm that source impedances remain compatible with the required common-mode range and settling performance.
This page combines the manufacturer device specifications with application guidance, package information, replacement analysis, and design-focused comparisons. It highlights where the INA110KU fits in high-speed measurement systems and provides practical context for selecting among same-package alternatives before committing the SOL-16 footprint to a PCB layout.
直接替換替代品，適用於 INA110KU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： INA110KU （相同外形與佔位） — 差異在於 Supply Voltage Range, Package, Slew Rate, Architecture, Operating Temperature Range.
INA110KUG4
✅ 直接替換📋 參考替代品（不在目錄中）
AD524ARZ-16
✅ 直接替換📋 參考替代品（不在目錄中）
INA111BU
✅ 直接替換聯絡詢價
查看資料表 →INA110KU 最大額定值與電氣特性
| Product Type | Monolithic FET-input instrumentation amplifier |
| Number of Circuits | 1 circuit |
| Gain Settings | 1, 10, 100, 200, and 500 V/V |
| Bandwidth | 2.5 MHz |
| Settling Time | 4 us to 0.01% |
| Slew Rate | 17 V/us |
| Input Offset Voltage | 1 mV |
| Supply Voltage Range | 12 V to 36 V |
| Input Impedance | Very high input impedance |
| 封裝 | 16-pin SOIC (SOL-16) |
| Package Width | 7.50 mm |
| 安裝類型 | Surface mount |
| Architecture | Current-feedback circuit topology |
| Input Stage | Laser-trimmed FET input stage |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
INA110KU 7.50 mm 腳位配置指南
INA110KU（7.50 mm 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： INA110KU.
請參閱 資料表 以查看完整腳位配置。
典型應用
INA110KU 適用於 6 應用s: High-Speed Multiplexed Data Acquisition, Bridge Sensor Signal Conditioning, Current-Shunt Measurement, Laboratory Instrumentation, Industrial Sensor Interface, Audio and Communication Signal Conditioning.
High-Speed Multiplexed Data Acquisition
The INA110KU suits multiplexed data-acquisition systems that must settle rapidly after selecting a new input. Its 2.5 MHz bandwidth and 4 us settling to 0.01% provide the core analog performance needed for high-rate channel measurements, while the FET input stage limits loading on high-impedance sources. Place the amplifier close to the multiplexer and ADC where practical, balance input impedances, and account for mux, protection, and ADC acquisition time when calculating the complete sampling interval.
推薦
Bridge Sensor Signal Conditioning
The INA110KU can condition the small differential output of a resistive bridge while rejecting common-mode excitation and supply variation. Internal gains of 1, 10, 100, 200, and 500 V/V cover many bridge-output ranges, and the stated 1 mV input offset provides a defined starting point for error analysis. Keep the bridge excitation wiring balanced, use symmetric input routing, and confirm that signal common-mode voltage, bridge output swing, and input bias-current error fit the selected gain.
推薦
Current-Shunt Measurement
The INA110KU is appropriate for amplifying the differential voltage generated by a low-value current shunt. Very high input impedance helps preserve the shunt measurement, while internal gain options can bring small millivolt-level signals into the range of an ADC. Select a gain that keeps the largest expected current below saturation, use Kelvin-style routing where practical, and verify that common-mode voltage remains valid throughout the shunt's measurement range.
推薦
Laboratory Instrumentation
The INA110KU is well suited to laboratory front ends that amplify low-level differential signals without drawing substantial current from the source. Its 17 V/us slew rate and 2.5 MHz bandwidth support dynamic measurements, while the fixed internal gains simplify repeatable bench configurations. For precision work, characterize input offset and drift at the selected gain, keep input filtering symmetric, and use the manufacturer's pin-description table to implement reference and feedback connections correctly.
推薦
Industrial Sensor Interface
The INA110KU can amplify differential outputs from industrial pressure, strain, and position sensors when the source impedance is high and interference must be rejected. The FET input stage provides very high input impedance and low input bias current, allowing protection networks to be placed at the connector rather than immediately at the amplifier. Maintain symmetry between input paths, provide solid return-current routing, and confirm the sensor excitation and common-mode limits before finalizing gain selection.
推薦
Audio and Communication Signal Conditioning
The INA110KU can serve as a differential gain stage in communication or audio signal paths that require high input impedance and selectable fixed gain. Its 2.5 MHz bandwidth covers signals beyond the audio baseband, while the 4 us settling behavior benefits systems that change operating state rapidly. For low-noise audio work, evaluate input-referred noise at the selected gain, maintain balanced input routing, and avoid placing high-gain circuitry where thermal gradients or leakage currents could degrade the measurement.
推薦
推薦產品摘要
工程參考資料，適用於 INA110KU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | INA110KUG4 | AD524ARZ-16 | INA111BU | INA114BU | INA118UB |
|---|---|---|---|---|---|---|
| Package | 16-pin SOIC (SOL-16) | 16-pin SOIC (SOL-16) | 16-pin SOIC (SOL-16) | 16-pin SOIC (SOL-16) | 16-pin SOIC (SOL-16) | 16-pin SOIC (SOL-16) |
| Brand | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- Fast fixed-gain settling supports high-rate acquisition (對比AD524ARZ-16)
- Broad internal gain selection in one package (對比INA111BU)
- High-impedance FET input stage (對比INA114BU)
- Wide stated supply operating range (對比INA118UB)
設計說明
Route the two differential inputs as symmetric, short paths from the source or protection network to the corresponding amplifier pins. Maintain comparable impedances on both inputs to limit common-mode-to-differential conversion and gain errors. Keep the amplifier close to the multiplexer and ADC where the signal is small, and return connector or sensor grounds directly to the analog ground plane rather than through high-current digital paths.
Do not assume that the internal gain-set resistors make every gain configuration interchangeable without checking the manufacturer gain table. The INA110KU offers internal settings of 1, 10, 100, 200, and 500 V/V, but the required external feedback components, stability conditions, and effective bandwidth can differ by gain. Verify the selected configuration against the Texas Instruments datasheet before release.
For multiplexed measurements, include source settling, multiplexer transition time, amplifier settling, and ADC acquisition in the total measurement interval. The 4 us settling to 0.01% is useful for fast systems but does not remove settling contributions from high-impedance sources or protection networks. Use symmetric input filters with suitable low-ESR capacitors and confirm that their corner frequencies do not interfere with the required signal bandwidth.
Place input, output, and reference bypass capacitors close to their associated pins using the topology and capacitance values specified by Texas Instruments. Because the INA110KU accepts a 12 V to 36 V supply range, check the actual rail voltage, output headroom, and power dissipation across the intended supply tolerance. A stable reference connection is essential because gain accuracy and output error depend on the reference network.
合規資訊
The manufacturer identifies INA110KU as a commercial-grade device, but no target-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was found. AEC-Q100 is not applicable to this commercial instrumentation amplifier.
