ADS7804P - 12-Bit 100 kSPS SAR ADC | Texas Instruments
MPN： ADS7804P ✓ 啟用中ADS7804P 概覽
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.
直接替換替代品，適用於 ADS7804P — 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。
此產品無可直接替換的替代品。
申請替代品ADS7804P 最大額定值與電氣特性
| Converter Type | 12-bit successive-approximation ADC |
| Analog Input Count | 1 input |
| 解析度 | 12 bits |
| 取樣率 | 100 kSPS |
| Conversion Time | 10 us |
| 供應電壓 | 5 V |
| 工作溫度範圍 | -40 °C to +85 °C |
| Temperature Grade | Industrial |
| 封裝 | 28-pin PDIP |
| 安裝方式 | Through-hole |
ADS7804P 28-pin pdip 腳位配置指南
ADS7804P（28-pin pdip 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： ADS7804P.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADS7804P 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ADS7804P — 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 |
|---|---|
| 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 |
主要差異化特點
- Balanced resolution and acquisition speed (對比ADS7805)
- Through-hole package for prototype and legacy board integration (對比ADS7805)
- Industrial temperature coverage (對比ADS7805)
設計說明
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.
合規資訊
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.