ADS7804P - 12-Bit 100 kSPS SAR ADC | Texas Instruments
部品番号: ADS7804P ✓ 生産中ADS7804P 概要
An ADC is a data-conversion IC that converts an analog voltage into a digital code for processing, measurement, or control. The ADS7804P belongs to the ADC hierarchy: analog-to-digital converter, data-converter IC, and semiconductor. Its successive-approximation architecture compares the input voltage with an internal reference through a series of increasingly precise comparisons, producing a 12-bit result after the specified conversion process.
The principal device characteristics are 12-bit resolution, 100 kSPS throughput, one analog input, a 5 V supply, and a 28-pin through-hole PDIP package. The single-input architecture makes the converter suitable for one analog measurement channel, while the 12-bit result provides 4096 digital codes. The device is identified as an industrial-temperature-grade component and is intended for equipment operating across the -40 °C to +85 °C range.
The ADS7804P uses a parallel digital interface and a sampling CMOS conversion structure. In a measurement circuit, the analog signal is presented to the input pin, the converter acquires the voltage, and the resulting digital word is made available to the host processor or control logic. The 100 kSPS rate supports process monitoring, instrumentation, industrial control, and embedded measurement systems that do not require high-speed waveform conversion.
Because the ADS7804P is specified for a 5 V supply, the system must provide a regulated supply with suitable decoupling close to the device. Input and reference routing should be kept short and protected from noisy power stages. The 28-pin PDIP format is useful for through-hole prototypes, legacy industrial boards, and designs where a socketed or manually assembled implementation is preferred.
This page provides a structured product overview, verified specifications, application guidance, design notes, and a comparison framework for engineers evaluating the ADS7804P. Use the manufacturer datasheet for the complete pin description, electrical limits, timing diagrams, reference configuration, and application circuit before releasing a production design.
ドロップイン代替品: ADS7804P — 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ADS7804P 最大定格＆電気的特性
| Converter Type | 12-bit successive-approximation ADC |
| Analog Input Count | 1 input |
| 分解能 | 12 bits |
| サンプリングレート | 100 kSPS |
| Conversion Time | 10 us |
| 電源電圧 | 5 V |
| 動作温度範囲 | -40 °C to +85 °C |
| Temperature Grade | Industrial |
| パッケージ | 28-pin PDIP |
| 実装スタイル | Through-hole |
ADS7804P 28-pin pdip ピン配置ガイド
ADS7804P (28-pin pdip 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: ADS7804P.
詳細は データシート をご参照ください。
主な用途
ADS7804P の用途: 6 件s: Industrial Process Monitoring, Instrumentation and Data Acquisition, Machine Control Interfaces, Power Supply Telemetry, Sensor Interface Modules, Educational and Prototype Data Loggers.
Industrial Process Monitoring
The ADS7804P fits industrial process-monitoring designs that periodically measure analog sensor outputs such as pressure, temperature, or flow. Its 12-bit resolution provides 4096 digital codes, while the 100 kSPS sampling rate allows the controller to refresh measurements more quickly than a slow slow-rate acquisition system. The 5 V supply fits common industrial control boards. Place the converter close to the analog front end, use a stable reference, and isolate sensor wiring from switching nodes to prevent measurement errors.
おすすめ
Instrumentation and Data Acquisition
Use the ADS7804P in instrumentation requiring a deterministic, single-channel conversion path with 12-bit resolution. The 100 kSPS rate is sufficient for many panel meters, laboratory interfaces, and slow signal-acquisition channels, while the parallel-oriented legacy style can simplify connection to suitable digital logic. The 28-pin PDIP package supports prototypes and through-hole instrument boards. Apply careful grounding and reference layout, and verify the interface timing against the host controller before fabrication.
おすすめ
Machine Control Interfaces
The ADS7804P can serve as the measurement ADC in a machine-control system that converts an analog command or feedback signal into a digital value. Its 100 kSPS throughput supports responsive supervisory control without the complexity of a high-speed waveform converter. The industrial temperature range of -40 °C to +85 °C supports equipment intended for harsher environments. Keep the analog trace short, bypass the 5 V rail close to the device, and validate the input range and acquisition sequence in the final control loop.
おすすめ
Power Supply Telemetry
The ADS7804P is suitable for supervisory telemetry that measures a scaled supply, output current, or temperature condition in a power system. A 12-bit code provides adequate resolution for many diagnostic rails, and the 100 kSPS capability permits rapid updates when the controller must detect excursions. The single input keeps circuitry straightforward, although multiplexed measurements require additional switching and settling time. Use a precision divider or amplifier, protect the analog pin against transients, and establish the input limits from the manufacturer electrical characteristics.
おすすめ
Sensor Interface Modules
ADS7804P can form the central measurement element of a sensor interface module for resistive, voltage, or externally conditioned sensors. The device's 12-bit conversion resolution and 100 kSPS rate fit slow industrial sensors that do not require simultaneous sampling. Through-hole packaging is convenient for modular and educational hardware where manual assembly or socketed construction is preferred. The analog conditioning stage must match the sensor output range, and the reference and decoupling network should remain close to the converter for stable code accuracy.
おすすめ
Educational and Prototype Data Loggers
The ADS7804P is well suited to educational ADC platforms because it combines a recognizable 12-bit conversion result, a documented 100 kSPS rate, and a straightforward 28-pin PDIP footprint. Students can observe digital-code changes, investigate sampling behavior, and build temperature or potentiometer measurement experiments. The through-hole package allows manual soldering on perfboards and custom trainer boards. Keep the lesson focused on reference stability, input scaling, and acquisition timing, and consult the datasheet for every pin and electrical limit.
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: ADS7804P — 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 |
|---|---|
| Package | 28-pin PDIP |
| Brand | Texas Instruments |
| Converter Type | Successive-approximation ADC |
| Resolution | 12 bits |
| Sampling Rate | 100 kSPS |
| Conversion Time | 10 us |
| Analog Input Count | 1 input |
| Supply Voltage | 5 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Temperature Grade | Industrial |
主な差別化要因
- Balanced resolution and acquisition speed （vs ADS7805)
- Through-hole package for prototype and legacy board integration （vs ADS7805)
- Industrial temperature coverage （vs ADS7805)
設計ノート
The ADS7804P is specified for a 5 V supply. Place the input, output, and reference bypass capacitors close to their corresponding pins, following the manufacturer application circuit and capacitor recommendations. Keep high-current switching paths on the opposite side of the PCB from the analog input. Confirm the power-up sequence and absolute maximum limits before connecting external sources.
Route the analog input as a short trace directly to the converter, with a quiet ground reference for the measurement path. Keep digital control and data lines away from the input and reference nodes. For a new PCB, use the exact pin numbering and package outline in the Texas Instruments datasheet; the verified product information identifies a 28-pin PDIP but does not reproduce the complete pin table.
Do not assume that a pin-compatible family member is a drop-in replacement without confirming the package, interface, reference requirements, and timing behavior. The ADS7804 datasheet mentions the ADS7805 as pin-compatible, but the available cross-reference information does not verify a matching 28-pin PDIP configuration. Validate the exact ordering code and compare the complete electrical tables before substitution.
コンプライアンス情報
The available manufacturer and distributor information does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for ADS7804P. The industrial temperature classification is not an AEC-Q100 qualification.