ADS7805U - 16-Bit 100 kSPS SAR ADC | Texas Instruments
MPN: ADS7805U ✓ NakahandaADS7805U Ulas
An SAR ADC is a sampling data-conversion category that compares the sampled input against a capacitor-based internal DAC during successive approximation. The ADS7805U integrates a 16-bit SAR core, sample-and-hold circuit, reference, clock, microprocessor interface, and three-state output drivers. This places a complete conversion subsystem within a single analog-to-digital converter IC.
Its principal characteristics include 16-bit resolution, one analog input, a 10 µs conversion time, CMOS construction, and a 28-pin SOIC package. The parallel output interface supports direct connection to suitable microprocessor or digital-logic systems. Three-state drivers allow multiple devices sharing a data bus to place their outputs in a high-impedance state when not selected.
Technically, the capacitor-based SAR conversion sequence provides deterministic sampling and conversion behavior suitable for instrumentation, industrial control, test equipment, and embedded measurement systems. The integrated reference and clock blocks reduce the number of external supporting components, while the single analog input simplifies front-end routing compared with multiplexed multi-channel converters.
Typical uses include sensor signal acquisition, process-control monitoring, laboratory measurement, digital instrumentation, and industrial data logging. Designers must supply suitable input conditioning and reference bypassing, and must account for analog noise, settling time, acquisition time, and bus timing when connecting the converter to a controller.
The main design trade-off is the 16-bit parallel interface: it provides direct high-resolution data access but requires more board traces and I/O resources than a serial-interface ADC. A 5 V supply range also means the device cannot directly operate from a 3.3 V system without appropriate interface and level-transition design.
This page combines manufacturer and distributor information, verified package and conversion details, drop-in comparison data, and practical design considerations. It separates confirmed ADS7805U characteristics from unavailable electrical, pinout, price, and lifecycle details so engineers can identify what must still be confirmed in the manufacturer datasheet.
Mga alternatibo na pwedeng ilagay na ADS7805U — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ADS7805U (parehas na form factor at footprint) — pagkakaiba sa Package, Data Interface, Number of Input Channels, Supply Voltage.
ADS7807UBE4
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ADS7805UG4
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ADS7805U Mga Pinakamataas na Rating at Electrical Characteristics
| ADC Resolution | 16 bit |
| Analog Input Count | 1 input |
| Conversion Architecture | Successive Approximation Register (SAR) |
| Conversion Time | 10 µs |
| Maximum Sampling Rate | 100 kSPS |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Process Technology | CMOS |
| Uri ng Interface | Parallel microprocessor interface |
| Output Driver Type | 3-state output drivers |
| Integrated Reference | Yes |
| Integrated Clock | Yes |
| Integrated Sample-and-Hold | Yes |
| Packhaging | SOIC (DW), 28 pins |
| Uri ng Pagpapasok | Surface mount |
| Input Type | Single-ended analog input |
Gabay sa Pin Configuration ng ADS7805U soic (dw), 28 pins
Pin configuration para sa ADS7805U (soic (dw), 28 pins package). Ang analog component na ito ay may input, output, at power supply pins. Sumangguni sa datasheet ng manufacturer para sa offset null, compensation, at enable pin configurations. Perpekto para sa signal conditioning at amplifier circuits.
Wala ng detalyadong pinout data na magagamit para sa ADS7805U.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ADS7805U ay nararapat para sa 6 aplikasyons: Industrial Sensor Acquisition, Precision Process Control, Digital Test and Measurement, Laboratory Data Logging, Industrial Data Acquisition, Embedded Control System.
Industrial Sensor Acquisition
The ADS7805U fits industrial sensor acquisition when the measurement chain needs 16-bit resolution and conversion throughput up to 100 kSPS. Its single SAR input can sample a conditioned voltage representing temperature, pressure, position, or level, while the integrated sample-and-hold, reference, and clock reduce the number of separate analog support circuits. The 28-pin parallel interface connects directly to a suitable digital controller but requires careful bus routing and enough I/O pins. Because the supplied data does not state the operating-temperature range or noise specifications, engineers must verify those limits and calculate input-filter and settling requirements before applying the converter directly to low-level sensor signals.
Precision Process Control
The ADS7805U is suitable for closed-loop industrial process control where feedback signals require deterministic 16-bit conversion and up to 100 kSPS throughput. A SAR architecture samples the control input and converts it using an internal capacitor-based DAC, providing a practical measurement stage ahead of a microcontroller, PLC, or DSP. Its three-state output drivers can support controlled bus sharing where several converters are present. The design must include an analog front end for sensor excitation, filtering, level shifting, and overvoltage protection. Verify acquisition time, input impedance, output-noise limits, and digital timing from the Texas Instruments datasheet before selecting the external signal-conditioning network.
Digital Test and Measurement
The ADS7805U can serve as the measurement engine in bench instrumentation that converts an analog test point into a 16-bit digital value. Its 10 µs conversion time permits acquisition rates as high as 100 kSPS when continuous measurements are required, while the parallel output supports direct communication with control logic. The converter is useful for programmable instruments, waveform analyzers, and automated production equipment where a serial interface would add protocol overhead. Signal integrity and reference stability remain central to accuracy, so use short analog routes, appropriate bypass capacitors, and a clean supply source according to the manufacturer application circuit.
Laboratory Data Logging
The ADS7805U is appropriate for laboratory measurement systems that need higher resolution than typical low-cost sensor converters and faster conversion than many general-purpose multiplexed ADCs. A single analog input supports repetitive sampling of one conditioned measurement channel, and 100 kSPS throughput allows dense time-series acquisition. The parallel interface can feed a controller or microcontroller capable of latching 16-bit results, while three-state outputs simplify shared-bus arrangements. Because the verified information does not include accuracy drift, reference tolerance, noise, or temperature-coefficient data, those specifications must be checked before setting calibration intervals or laboratory accuracy limits.
Industrial Data Acquisition
The ADS7805U fits compact industrial data-acquisition modules requiring one high-resolution analog channel and rapid sequential sampling. Its 16-bit SAR converter, integrated reference, clock, and sample-and-hold circuit reduce external component count, while the 28-pin SOIC package remains compatible with conventional surface-mount assembly. A practical implementation would condition the input, protect it from industrial transients, and use the three-state parallel outputs to share a controller bus. Verify supply tolerance, digital input thresholds, clock behavior, and acquisition timing in the official datasheet, especially when the controller operates at a voltage other than the ADC’s 4.75 V to 5.25 V supply range.
Embedded Control System
The ADS7805U can add a precision analog measurement channel to an embedded control system when 16-bit resolution and deterministic sampling are more important than minimizing serial-interface wiring. A controller can read the parallel conversion result, perform scaling or filtering, and update a supervisory loop based on the measured analog value. The 10 µs conversion time supports up to 100 kSPS operation, but sustained use requires enough controller bus bandwidth and a correctly timed acquisition sequence. The supplied data does not identify compatible companion microcontrollers, so no unverified companion MPNs are listed; interface compatibility should be established from the ADC timing diagrams and the selected controller’s I/O specifications.
Impormasyon ng Talumpati sa Engineering for ADS7805U — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ADS7807U | ADS7805UG4 |
|---|---|---|---|
| Package | SOIC (DW)-28 | SOIC (DW)-28 | SOIC (DW)-28 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit |
Pangunahing mga Pagkakaiba
- Documented 10 µs conversion time (kumpara saADS7807U)
- Parallel microprocessor interface with three-state outputs (kumpara saADS7807U)
- Integrated reference, clock, and sample-and-hold (kumpara saADS7805UG4)
Talaan ng Disenyo
Route the analog input directly to the converter and keep the input path short, with grounding and bypass placement selected from the manufacturer’s recommended application circuit. The parallel output bus should be short enough to limit switching noise and data-transition skew. Because the supplied excerpts do not provide acquisition-time, input-capacitance, or reference-bypass requirements, use the official datasheet values rather than generic capacitor-selection rules.
Account for the 28-pin parallel interface when assigning controller pins and laying out the board. Confirm output timing, input thresholds, control-signal setup requirements, and bus direction behavior from the datasheet. The three-state output drivers can support shared-bus arrangements, but arbitration and disable timing must be designed so only one converter drives the data lines at a time.
Do not treat a shared 28-pin SOIC package as proof of drop-in compatibility. Compare every pin, including address, control, output-enable, reference, analog input, and power connections, before substituting ADS7807U or ADS7805UG4. Also verify the input range and source-impedance limits; a 16-bit converter cannot provide useful 16-bit results if the source impedance, acquisition time, or reference behavior violates the device conditions.
Provide a clean supply within the verified 4.75 V to 5.25 V range and place recommended bypass components close to the supply pins. The supplied data does not include quiescent current, active-current, or power-supply rejection specifications, so thermal and noise calculations cannot be completed from the available excerpts. Obtain those values from the manufacturer datasheet before sizing the power source or estimating converter self-heating.
Impormasyon ng Pagsunod sa Kautusan
The supplied ADS7805U excerpts do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or distributor pages.
