MPY100AM - Precision Analog Multiplier/Divider | Texas Instruments
MPN： MPY100AM ✓ 啟用中MPY100AM 概覽
An analog multiplier/divider is a nonlinear signal-processing building block that produces an output proportional to the product, quotient, or square root of two input voltages. Within the signal-chain hierarchy, it sits alongside operational amplifiers and precision analog computing circuits, and is classified as a high-performance analog IC used for modulation, demodulation, rms conversion, and power measurement.
Key features per the manufacturer datasheet include low cost, differential inputs, 100% tested and guaranteed accuracy, no external trimming required, low noise performance (quoted at 10 kHz in the datasheet features), and a highly reliable one-chip design. Because the transfer function is laser-trimmed at the factory, designers avoid the tedious calibration procedures associated with discrete multiplier cells built from op-amps and matched transistor pairs.
The MPY100 architecture integrates the multiplier core and output summing amplifier on one die, which improves accuracy and thermal tracking compared to hybrid or multi-chip solutions. It performs four-quadrant multiplication, division, and square rooting without external amplifiers or potentiometers, simplifying PCB area and bill-of-material cost in analog computation circuits.
Typical applications include analog signal conditioning, modulation and demodulation, RMS-to-DC conversion front ends, power calculation in instrumentation, and general-purpose analog computing in industrial and test equipment. The wide operating temperature range supports demanding industrial environments.
Design consideration: as an analog computation device, the MPY100 is sensitive to supply decoupling and layout; keep input traces short and ground the differential inputs properly to preserve the factory-trimmed accuracy.
This page synthesizes distributor availability, family alternatives, and practical design guidance not found in the manufacturer datasheet.
直接替換替代品，適用於 MPY100AM — 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： MPY100AM （相同外形與佔位） — 差異在於 Function, Package, Accuracy, Mounting Type, Design.
MPY100AMQ
✅ 直接替換📋 參考替代品（不在目錄中）
MPY100AM10
✅ 直接替換📋 參考替代品（不在目錄中）
MPY100AM 最大額定值與電氣特性
| 功能 | Multiplier/Divider (four-quadrant multiplication, division, square root) |
| Input Type | Differential input |
| External Trimming | Not required |
| Accuracy | 100% tested and guaranteed |
| Noise Characteristic | Low noise (datasheet quotes 10 kHz) |
| Design | Highly reliable one-chip (monolithic laser-trimmed) design |
| 封裝 | TO-100 metal can, 10-pin |
| Alternate Packages | DIP or TO-100 type package (family) |
| Temperature Range | Wide temperature operation |
| 安裝類型 | Through Hole |
MPY100AM dip or to-100 type package (family) 腳位配置指南
MPY100AM（dip or to-100 type package (family) 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： MPY100AM.
請參閱 資料表 以查看完整腳位配置。
典型應用
MPY100AM 適用於 6 應用s: Analog Signal Conditioning, Modulation and Demodulation, RMS-to-DC Conversion, Power Measurement in Instrumentation, Analog Computing and Control Loops, Test and Measurement Equipment.
Analog Signal Conditioning
The MPY100AM fits analog signal-conditioning front ends where gain, scaling, or nonlinear correction must be applied to bipolar sensor signals. Its four-quadrant multiplication handles signals of either polarity, and the differential inputs allow direct connection across bridge or shunt sources without an additional instrumentation stage. Because the transfer function is laser-trimmed at the factory, the classic external scale-factor and offset potentiometers of discrete multiplier cells are eliminated, reducing calibration labor in production. The one-chip monolithic design also improves thermal tracking between the multiplier core and output amplifier compared with hybrid constructions, holding accuracy stable over the industrial temperature range.
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Modulation and Demodulation
For amplitude modulation, synchronous detection, and lock-in style demodulation, the MPY100AM multiplies a carrier with a modulating signal in a single device. The differential X and Y inputs accept bipolar carrier and signal voltages, producing a true four-quadrant product that contains the sum and difference frequency components needed for detection. Low noise performance quoted at 10 kHz in the datasheet helps preserve signal-to-noise ratio in narrowband measurement channels. Since no external trimming is required, carrier-leak nulling networks can be simplified to a single offset adjustment at the summing input, and the TO-100 metal can provides inherent shielding against electrically coupled carrier feedthrough in sensitive receivers.
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RMS-to-DC Conversion
In an RMS-to-DC converter built around the square-then-average-then-square-root method, the MPY100AM supplies both nonlinear operations. Configured as a squarer, its four-quadrant core squares the input waveform; after an RC averaging stage, the same device wired for square-root mode takes the root of the mean-square value. The 100% tested and guaranteed accuracy stated in the datasheet means the overall converter error budget is dominated by the averaging network, not multiplier trim. The metal can package supports stable thermal behavior during long averaging periods. This analog approach suits panel meters and legacy instrumentation where a dedicated RMS IC is unavailable or where waveform class varies.
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Power Measurement in Instrumentation
True power in a single-phase system equals the product of instantaneous voltage and current, and the MPY100AM performs exactly this multiplication in analog form. Connect the voltage-scaled signal to the X differential input and the current-derived signal from a shunt or transformer to the Y input; the output is proportional to instantaneous power, and low-pass filtering yields average power directly. The differential inputs reject common-mode content from the current sensing path, and the laser-trimmed scale factor removes a calibration step from each instrument produced. The wide temperature operation specified by the manufacturer supports bench and field instrumentation environments without seasonal recalibration.
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Analog Computing and Control Loops
The MPY100AM serves analog computation blocks in control systems, such as computing the product of two control variables, implementing variable gain VCA stages, or generating a division term for ratio control. The datasheet highlights that division and square rooting are available without external amplifiers or potentiometers, which historically made this device a compact analog computer element. Its one-chip design keeps the compute core and output stage at the same die temperature, improving loop stability in slow analog controllers. The 10-pin metal can layout also fits the point-to-point wiring style common in maintaining vintage analog control and simulation equipment.
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Test and Measurement Equipment
Bench instruments such as function generators, analog computers, gain-controlled amplifiers, and analyzer front ends use the MPY100AM wherever a signal must be scaled by another signal. Its guaranteed 100%-tested accuracy supports metrology-grade instruments without field trim, and low noise characterized at 10 kHz preserves measurement resolution in audio-band and low-frequency analysis. The TO-100 metal can package eases socketed serviceability, a practical advantage in long-life laboratory hardware. Because the part remains available through broker channels as of 2026-09-13, maintenance of installed legacy test equipment can continue without board redesign.
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推薦產品摘要
工程參考資料，適用於 MPY100AM — 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 | MPY100AMQ | MPY100AM10 | MPY100AG |
|---|---|---|---|---|
| Package | TO-100 (10-pin metal can) | TO-100 (10-pin metal can) - same | TO-100 (10-pin metal can) - same | TO-100 (10-pin metal can) - same family |
| Brand | Texas Instruments (Burr-Brown) | Texas Instruments (Burr-Brown) | Texas Instruments (Burr-Brown) | Texas Instruments (Burr-Brown) |
| Function | Four-quadrant multiplier/divider | Four-quadrant multiplier/divider | Four-quadrant multiplier/divider | Four-quadrant multiplier/divider |
| External Trimming | Not required | Not required | Not required | Not required |
| Accuracy | 100% tested and guaranteed | 100% tested and guaranteed | 100% tested and guaranteed | 100% tested and guaranteed |
| Grade Suffix | AM | AMQ | AM10 | AG |
| Mounting | Through Hole | Through Hole | Through Hole | Through Hole |
主要差異化特點
- Factory laser-trimmed accuracy with no external trimming (對比AD534)
- Metal can package for shielding and serviceability (對比AD534)
- Single-chip division and square-root without external amplifiers (對比MPY100AMQ / MPY100AM10)
設計說明
Use clean, well-decoupled dual supplies for the MPY100AM, as analog multiplier error terms include supply-feedthrough components. Place 100 nF ceramic decoupling capacitors directly at the supply pins with a solid ground reference. Estimated: keep supply ripple well below the multiplier error floor; for a part rated for 0.5%-class accuracy, maintaining supply ripple under roughly 10 mV keeps its contribution below 1% of the error budget. Verify exact supply limits in the official MPY100 datasheet electrical characteristics table before design freeze.
Although the MPY100AM is a through-hole metal can, layout still matters: keep the differential X and Y input traces short, balanced, and away from high-swing output or carrier lines to limit feedthrough. Take advantage of the TO-100 case for local shielding by tying the can per the datasheet recommendation. Use a star or solid ground plane region under the multiplier, and keep the output summing node (with its feedback resistor) physically close to the device to minimize stray capacitance that can cause peaking or instability.
A common pitfall is adding scale-factor trim potentiometers from discrete-multiplier practice - the MPY100AM is factory laser-trimmed and 100% tested, so external trimming networks usually add error and drift rather than improve accuracy. Another pitfall: leaving the Z (summing) input improperly terminated shifts the transfer function from multiply to divide mode unintentionally; confirm the wiring diagram for the intended operation (multiplication, division, or square root) in the official datasheet before prototyping.
合規資訊
Compliance status not stated in provided distributor data. As a legacy Burr-Brown metal-can part, RoHS/REACH status should be confirmed with Texas Instruments before shipping into restricted markets.
