AD7811C - 10-Bit 350 kSPS 4-Channel ADC | Analog Devices
部品番号: AD7811C ✓ 生産中AD7811C 概要
An ADC is an analog-to-digital converter, a mixed-signal semiconductor that converts continuous input voltages into numeric codes for processing, measurement, or control. The AD7811 belongs to the successive-approximation ADC family and provides a compact interface for systems requiring moderate resolution and relatively rapid sampling rather than the throughput or precision of high-end data converters.
The AD7811C provides four single-ended inputs that can be configured as three pseudo-differential inputs referenced to a common point. They can also be configured as two independent pseudo-differential channels. This flexibility supports applications that need to monitor several analog signals, compare paired sensor outputs, or sample a mixture of common-referenced and independently sensed inputs without requiring four unrelated converter channels.
Operation from a single 2.7 V to 5.5 V supply permits use in both low-voltage and 5 V systems. The integrated 2.5 V reference and track-and-hold amplifier reduce the number of external supporting functions, while the 10-bit resolution provides 1,024 possible digital codes. Because the verified product information does not state the complete electrical characteristics, input impedance, acquisition time, temperature range, or interface timing, those values require confirmation in the manufacturer datasheet before design release.
Typical uses include industrial process monitoring, sensor-interface modules, battery-powered instrumentation, portable measurement equipment, and embedded control systems sampling multiple analog channels. The four-channel arrangement is particularly useful when several transducers or resistive sensors must be digitized within the same acquisition cycle.
Designers should confirm the exact package, pinout, serial-interface timing, input range, and reference behavior from the AD7811 manufacturer documentation. Because only a limited set of verified characteristics is available, PCB footprint compatibility, source-impedance requirements, sampling dynamics, and operating-temperature suitability must not be assumed without further engineering verification.
This page distinguishes documented AD7811C characteristics from unavailable parameters, records distributor references and freshness dates, and provides practical application guidance without presenting unverified specifications as facts.
ドロップイン代替品: AD7811C — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストAD7811C 最大定格＆電気的特性
| Converter Type | Successive-approximation A/D converter |
| 分解能 | 10 bit |
| Maximum Sampling Rate | 350 kSPS |
| Conversion Time | 2.3 µs |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Number of Single-Ended Inputs | 4 channels |
| Pseudo-Differential Input Configuration | 3 inputs referenced to a common point or 2 independent pseudo-differential channels |
| On-Chip Track-and-Hold Amplifier | Included |
| On-Chip Reference Voltage | 2.5 V |
| Output Code Count | 1,024 codes |
| RoHS ステータス | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
AD7811C standard ピン配置ガイド
AD7811C (standard パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: AD7811C.
詳細は データシート をご参照ください。
主な用途
AD7811C の用途: 6 件s: Industrial Process Monitoring, Battery-Powered Instrumentation, Paired Sensor Acquisition, Embedded Control Systems, Portable Environmental Monitoring, Data Acquisition Modules.
Industrial Process Monitoring
The AD7811C fits industrial process monitoring where several analog sensor signals must be sampled in a compact controller. Its four single-ended inputs can operate as three pseudo-differential channels referenced to a common point, or as two independent pseudo-differential channels. The 10-bit resolution provides 1,024 output codes, while the documented 350 kSPS conversion rate supports relatively rapid acquisition. A major design qualification is that the verified information does not specify the input range, common-mode limits, acquisition time, or operating-temperature range. Engineers must therefore verify signal conditioning, source impedance, and electrical limits against the complete manufacturer datasheet before using the converter directly with pressure, temperature, or position sensors.
おすすめ
Battery-Powered Instrumentation
The AD7811C is suitable for portable and battery-powered instrumentation because it operates from a single 2.7 V to 5.5 V supply and combines a converter, track-and-hold amplifier, and 2.5 V reference in one device. A 10-bit result can be adequate for displaying slowly changing measurements such as temperature, pressure, or light level without the cost and power burden of a higher-resolution converter. The 350 kSPS maximum rate is much faster than many slow sensor channels require. Actual battery life depends on operating current, which is not provided in the verified data, so it must be obtained from the manufacturer documentation before comparing duty-cycle energy budgets.
おすすめ
Paired Sensor Acquisition
The AD7811C can serve paired-sensor systems that benefit from differential-style measurement without requiring a separate converter for every signal. Its four single-ended inputs may be arranged as two independent pseudo-differential channels, allowing two sensor pairs to be acquired within one converter. The 2.3 µs conversion time and 350 kSPS rate provide timing margin for many moderate-bandwidth measurements. Because the verified material does not define input impedance, acquisition time, input voltage range, or channel multiplexing details, the circuit cannot be finalized until those parameters are checked. Signal conditioning and grounding should be designed around the actual input structure and common-mode behavior shown in the datasheet.
おすすめ
Embedded Control Systems
The AD7811C is appropriate for embedded control systems that acquire several analog quantities while executing supervisory or control functions. Four inputs reduce the number of separate conversion channels, and the single 2.7 V to 5.5 V operating range allows use across common embedded supply levels. The 10-bit resolution and 350 kSPS rate are appropriate when the control loop needs timely, moderate-precision feedback rather than laboratory-grade accuracy. Designers should verify the digital interface protocol and timing, because those details are not included in the supplied excerpts. The complete datasheet should also be used to confirm pin mapping, startup behavior, and whether the converter requires an external reference in the selected operating mode.
おすすめ
Portable Environmental Monitoring
The AD7811C can support compact environmental monitoring devices that combine multiple sensor types into one measurement platform. Its four-channel arrangement can be used for common-referenced pseudo-differential operation or two independent pseudo-differential pairs, while the 10-bit converter operates across a 2.7 V to 5.5 V supply range. A 350 kSPS rate is more than adequate for many environmental variables sampled at low update rates, allowing the controller to perform filtering and compensation. Input range, reference accuracy, power consumption, and temperature limits are not stated in the verified data, so enclosure thermal design and battery sizing must wait until those manufacturer values are obtained.
おすすめ
Data Acquisition Modules
The AD7811C is applicable to compact data-acquisition modules that gather multiple low-bandwidth analog measurements. A 10-bit converter with a 350 kSPS conversion rate provides a practical balance between sampling speed, resolution, and supply complexity for general-purpose monitoring. Four single-ended inputs can be assigned to transducers, potentiometers, or conditioned sensor outputs, while the on-chip 2.5 V reference and track-and-hold amplifier reduce supporting circuitry. Module designers must not assume the input is rail-to-rail or that the reference can drive external loads. The verified material does not provide those characteristics, so the full datasheet is required to establish scaling, front-end bandwidth, and calibration procedures.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AD7811C — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Brand | Analog Devices |
| Resolution | 10 bit |
| Maximum Sampling Rate | 350 kSPS |
| Conversion Time | 2.3 µs |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Input Configuration | 4 single-ended inputs; 3 common-referenced pseudo-differential inputs or 2 independent pseudo-differential channels |
| On-Chip Reference | 2.5 V |
| On-Chip Track-and-Hold Amplifier | Included |
| Unit Price | Quotation required; numeric price not provided |
主な差別化要因
- Four-channel configuration within a 10-bit converter （vs AD7812)
- Documented conversion performance （vs AD7811)
- Integrated support functions （vs AD7812)
設計ノート
Do not assume that the AD7811 and AD7811C descriptions establish an interchangeable pinout or that the AD7812 can replace the AD7811C. The verified information identifies four channels for AD7811 and eight for AD7812. Verify the package drawing, pin table, digital interface, analog input limits, and reference behavior in the current manufacturer documentation before approving a footprint or sourcing substitute.
Place the converter, analog input connections, and supporting reference or bypass components according to the layout guidance in the complete datasheet. Keep analog traces short, route them away from digital switching activity, and provide a low-impedance ground return. The verified excerpts do not state input impedance or acquisition time, so trace resistance, source impedance, and settling behavior cannot be finalized from the available data.
Design the supply around the documented 2.7 V to 5.5 V operating range and verify the device's actual current consumption before calculating regulator capacity or battery life. Although the converter includes a 2.5 V on-chip reference and track-and-hold amplifier, the excerpts do not confirm whether the reference is externally usable or whether additional bypass components are mandatory. Follow the manufacturer reference circuit and decoupling recommendations.
コンプライアンス情報
The verified web excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is recorded as not applicable because the supplied information identifies AD7811C as an industrial/electronic ADC rather than an automotive-qualified device.
