ADS7861E - 12-Bit, 500 kSPS, 4-Channel Simultaneous ADC | TI
Артикул: ADS7861E ✓ АктивенADS7861E Обзор
An ADC is a mixed-signal semiconductor that converts an analog voltage into a digital code. Within the broader hierarchy of data-converter ICs, the ADS7861E belongs to the successive-approximation ADC family and is used for data acquisition, instrumentation, industrial control, and signal measurement. Its fully differential inputs preserve differential signal integrity between the sample-and-hold amplifier and the ADC input while providing 80 dB common-mode rejection at 50 kHz.
The principal specifications include 12-bit resolution, a 500 kSPS conversion rate, four fully differential inputs, two simultaneous-sampling ADC channels, and a 24-pin SSOP package. The operating temperature range shown by the manufacturer ordering information is -40°C to +125°C. These characteristics make the device suitable for systems that require simultaneous acquisition, such as three-phase motor monitoring, vibration analysis, and multichannel process-control instrumentation.
Each ADC uses a successive-approximation conversion architecture, providing a practical balance between conversion speed, resolution, power consumption, and implementation complexity. The four inputs are grouped into two pairs, so corresponding channels can be captured together. This arrangement is useful when phase, timing, amplitude, or ratio relationships between paired signals must be preserved during acquisition.
Typical applications include industrial motor drive and inverter control, power-system monitoring, vibration and condition-monitoring equipment, process-control loops, and precision instrumentation. Differential input architecture is particularly useful in environments where common-mode noise can otherwise obscure the wanted signal. System designers should still allocate suitable analog filtering and provide compliant input and reference circuitry.
The principal design consideration is signal integrity. Input components, routing, grounding, reference stability, and digital-interface timing directly affect conversion performance. The verified sources provide the ADC family, package, resolution, throughput, channel arrangement, common-mode rejection, operating-temperature range, and a starting distributor price; additional electrical limits and a complete pin map must be obtained from the manufacturer datasheet before design release.
This page combines verified manufacturer and distributor information, documented drop-in family alternatives, parameter comparisons, and practical selection guidance to support engineering decisions beyond a basic distributor listing.
Аналоги без доработки для ADS7861E — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
ADS7861EG4
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ADS7861EBG4
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ADS7861E Максимальные параметры и электрические характеристики
| ADC Type | Successive-approximation ADC |
| Разрешение | 12 bit |
| Conversion Rate | 500 kSPS per ADC |
| Number of ADC Cores | 2 |
| Input Channels | 4 fully differential inputs |
| Channel Arrangement | 2+2 channels |
| Sampling Mode | Simultaneous sampling |
| Common-Mode Rejection | 80 dB at 50 kHz |
| Диапазон рабочих температур | -40°C to +125°C |
| Корпус | 24-pin SSOP (DBQ) |
| Terminal Count | 24 |
| Тип монтажа | Surface mount |
| Analog Input Type | Fully differential |
| Automotive Temperature Grade | Automotive |
| Starting Unit Price | $2.7735 as of 2026-10-30 |
Руководство по цоколевке ADS7861E в корпусе 24-pin ssop (dbq)
Цоколевка для ADS7861E (корпус 24-pin ssop (dbq)). Этот аналоговый компонент имеет выводы входа, выхода и питания. Обратитесь к техническому описанию производителя для конфигураций выводов балансировки нуля, коррекции и разрешения. Идеально подходит для схем обработки сигналов и усилителей.
Нет подробных данных о распиновке для ADS7861E.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
ADS7861E подходит для 6 применениеs: Three-Phase Motor Control, Power Inverter Monitoring, Industrial Process Control, Vibration and Condition Monitoring, Precision Test and Measurement, Data Acquisition and Control Systems.
Three-Phase Motor Control
ADS7861E fits three-phase motor monitoring because its four fully differential inputs are grouped into two 2-channel pairs for simultaneous acquisition. The 12-bit, 500 kSPS converters can sample paired current or voltage signals while preserving their timing relationship, which is important for phase-angle and vector calculations. Its 80 dB common-mode rejection at 50 kHz helps reduce common-mode disturbance from switching power stages. The main layout requirement is to keep sensitive differential routes compact, symmetric, and isolated from high-current switching paths.
Power Inverter Monitoring
ADS7861E is suitable for power-inverter feedback and protection measurements where multiple analog signals must be observed consistently. Four differential inputs provide flexibility for two current measurements and two associated voltage measurements, while the dual 500 kSPS successive-approximation architecture supports simultaneous channel capture. The 80 dB common-mode rejection at 50 kHz provides useful attenuation of shared high-voltage noise. Designers should confirm the input and reference ranges from the full datasheet and use appropriately rated external front-end components.
Industrial Process Control
ADS7861E can support multichannel process instrumentation that compares paired sensor outputs under changing plant conditions. Its four fully differential inputs reduce sensitivity to shared ground and noise offsets, while 12-bit resolution and 500 kSPS sampling provide a practical acquisition rate for supervisory and loop-control measurements. Simultaneous 2+2 sampling is valuable when two sensed variables must be evaluated against one another at the same instant. Sensor excitation, filtering, input range, and reference accuracy remain critical system-level considerations.
Vibration and Condition Monitoring
ADS7861E is applicable to vibration and machinery-condition monitoring when several sensor channels must be captured without introducing inter-channel timing offsets. Its 2+2 simultaneous-sampling structure supports paired acquisition, and the 500 kSPS conversion capability is suitable for many industrial vibration-analysis front ends. The fully differential inputs and 80 dB common-mode rejection at 50 kHz help manage environmental interference. Actual signal bandwidth must be checked against the complete datasheet acquisition and filter specifications before choosing the converter.
Precision Test and Measurement
ADS7861E fits laboratory and bench instrumentation that must compare two differential signals while acquiring them at the same instant. Its dual 12-bit converter architecture, 500 kSPS sampling rate, and four fully differential inputs support synchronized acquisition channels in a compact 24-pin SSOP. The specified 80 dB common-mode rejection at 50 kHz improves measurement integrity when both channels share partially common excitation or environmental noise. Instrument designers still need to validate noise, linearity, reference stability, and acquisition bandwidth against their accuracy budget.
Data Acquisition and Control Systems
ADS7861E is a practical fit for compact data-acquisition systems requiring several analog measurements and a deterministic digital interface. It combines four fully differential channels, two successive-approximation converters, 12-bit resolution, and 500 kSPS operation in one 24-pin SSOP package. Simultaneous acquisition within each pair helps reduce skew in measurements such as load and feedback. The system designer should budget carefully for routing and decoupling because the verified data does not provide the complete pinout, interface timing, or reference requirements.
Справочные инженерные данные для ADS7861E — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ADS7861EG4 | ADS7861EBG4 |
|---|---|---|---|
| Package | SSOP-24 (DBQ) | 24-QSOP - same 24-pin package class | SSOP-24 (DBQ) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| ADC Type | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC |
| Resolution | 12 bit | 12 bit | 12 bit |
Ключевые отличия
- Simultaneous paired-channel acquisition (против ADS7861EG4)
- Differential noise rejection for acquisition systems (против ADS7861EBG4)
- Compact 500 kSPS conversion function (против ADS7861EG4)
Заметки по проектированию
Route each differential input as a tightly coupled pair with symmetric geometry and continuous reference to the ground plane. The ADS7861E provides four fully differential inputs, so mismatched traces can unbalance the intended common-mode rejection and introduce channel-to-channel errors. Keep the analog inputs away from digital outputs, switching-node connections, inductors, and high-current return paths. Confirm the permitted input range and external filtering requirements in the complete manufacturer datasheet before fixing component values.
Place analog filtering, protection, and input-conditioning components close to the corresponding SSOP input pins to minimize parasitic pickup and trace resistance. The provided data confirms a 24-pin SSOP (DBQ) package but does not provide the complete pin map, so placement must be based on the official pin drawing rather than package numbering alone. Use a quiet ground strategy and separate analog and digital return currents to reduce coupling into the four simultaneous-sampling channels.
Use local low-impedance decoupling at the device's supply and reference pins, following the values and topology specified in the full Texas Instruments datasheet. The verified data confirms a 12-bit, 500 kSPS ADC with 80 dB common-mode rejection at 50 kHz but does not state the supply range, reference voltage, or power consumption. Consequently, no capacitor value or operating rail should be inferred from this page; those values must be taken directly from the datasheet before layout release.
Do not treat the simultaneous-sampling architecture as permission to ignore analog bandwidth or source impedance. The 2+2 input arrangement is intended to preserve timing relationships between paired signals, but incorrect front-end scaling, filtering, grounding, or reference design can still corrupt both channels. Verify the complete electrical limits, digital timing, acquisition-time behavior, and pin assignments for the selected ordering suffix before using ADS7861E as a drop-in substitute for another family member.
Информация о соответствии
The supplied web results identify ADS7861E as an automotive-temperature-grade part but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. Compliance fields therefore remain unknown rather than assumed.
