ADS7810UB - 12-Bit 800kHz SAR ADC ±10V | Texas Instruments
MPN: ADS7810UB ✓ نشطADS7810UB نظرة عامة
A successive-approximation register (SAR) ADC is a precision converter topology that resolves a single conversion in N clock cycles by switching a matched binary-weighted capacitor array against the input voltage. SAR ADCs sit at the bottom of the converter hierarchy: SAR ADC -> Nyquist-rate ADC -> data converter -> mixed-signal IC. They are favoured over delta-sigma or pipeline types when low-latency, single-shot acquisition with bipolar industrial input ranges is required.
Key features include a complete single-chip solution (no external reference or S/H required), a wide ±10 V input range well suited to industrial transducer signal levels, low aperture uncertainty, and 8 + 4 parallel output bits that interface directly to standard microprocessors and DSPs. The internal reference is trimmed and the device draws low power, making it attractive for multi-channel multiplexed data-acquisition boards.
Architecturally, the ADS7810UB uses a charge-redistribution capacitor DAC for SAR conversion, a buried-zener or bandgap-derived internal reference, and an onboard clock generator, eliminating most external components. Its parallel interface supports independent /RD and /CONVST control lines for synchronous sampling in multiple-ADC systems.
Typical applications include industrial process-control front ends, factory-automation data-acquisition cards, medical instrumentation front ends, and the analog input stages of PLCs. The bipolar ±10 V range connects directly to many 4-20 mA loop receivers and transducer outputs after a single resistor scale.
When designing with this part, ensure the analog ground and digital ground planes are joined at a single point near the converter and bypass supplies with a 10 µF tantalum in parallel with a 0.1 µF ceramic. Avoid routing digital switching edges near the analog inputs to preserve the 69 dB SINAD floor.
This page synthesizes distributor pricing, drop-in alternatives in the same 28-SOIC footprint, and practical design notes not collected in any single manufacturer datasheet.
بدائل مباشرة لـ ADS7810UB — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADS7810UB (نفس عامل الشكل والبصمة) — يختلف في Package, Sampling Rate, Data Interface, Reference, Architecture.
ADS7810UB/1K
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS7810UB-E4
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADS7810U/1KG4
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS7808UB/1K
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS7805PB
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS7807PBG4
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS7810UB الحدود القصوى والخصائص الكهربائية
| الدقة | 12 bits |
| معدل أخذ العينات | 800 kHz (max) |
| Throughput Time | 1.25 µs |
| Input Range | ±10 V (standard) |
| SINAD | 69 dB (min) at 250 kHz input |
| INL (max) | ±3/4 LSB |
| DNL (max) | ±1 LSB |
| Architecture | SAR with inherent S/H |
| Reference | Internal |
| Output Interface | Parallel (8 + 4) with output latches |
| Number of Inputs | 1 single-ended |
| العلبة | 28-pin SOIC (DW) - wide body |
| نطاق درجة حرارة التشغيل | -40 °C to +85 °C |
| جهد التغذية | ±5 V and +5 V (typical) |
| حالة RoHS | Compliant |
تكوين أطراف ADS7810UB
| دبوس 1 | VIN — Analog input (±10 V) |
| دبوس 2 | AGND — Analog ground |
| دبوس 3 | VREF+ — Internal reference positive output |
| دبوس 4 | VREF- — Internal reference negative output |
| دبوس 5 | REFCAP — Reference bypass capacitor |
| دبوس 6 | CAP — Compensation capacitor |
| دبوس 7 | DB0 — Data bit 0 (LSB) |
| دبوس 8 | DB1 — Data bit 1 |
| دبوس 9 | DB2 — Data bit 2 |
| دبوس 10 | DB3 — Data bit 3 |
| دبوس 11 | DB4 — Data bit 4 |
| دبوس 12 | DB5 — Data bit 5 |
| دبوس 13 | DB6 — Data bit 6 |
| دبوس 14 | DB7 — Data bit 7 |
| دبوس 15 | DB8 — Data bit 8 |
| دبوس 16 | DB9 — Data bit 9 |
| دبوس 17 | DB10 — Data bit 10 |
| دبوس 18 | DB11 — Data bit 11 (MSB) |
| دبوس 19 | /BUSY — Conversion-in-progress status output |
| دبوس 20 | /CONVST — Conversion start (active low) |
| دبوس 21 | /RD — Read strobe (active low) |
| دبوس 22 | /CS — Chip-select (active low) |
| دبوس 23 | DGND — Digital ground |
| دبوس 24 | VSS — Negative supply (-5 V) |
| دبوس 25 | VDD — Positive supply (+5 V) |
| دبوس 26 | NC — Not connected (per datasheet) |
| دبوس 27 | NC — Not connected (per datasheet) |
| دبوس 28 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
ADS7810UB مناسب لـ 6 التطبيقs: Industrial Process-Control Data Acquisition, Factory-Automation Analog Input Modules, Medical Instrumentation Signal Acquisition, PLC Analog Front-End Cards, Multiplexed Multi-Channel DAQ Boards, Generic Industrial Sensor Digitizer.
Industrial Process-Control Data Acquisition
The ADS7810UB fits industrial process-control front ends because its standard ±10 V bipolar input range directly connects to 4-20 mA loop shunts and legacy ±10 V transducer outputs without external scaling resistors. Designers get 12-bit resolution at 800 kHz sample rate, which is sufficient for monitoring vibration, pressure, and temperature loops simultaneously on a multiplexed PCB. Its 69 dB SINAD at 250 kHz input ensures reliable signal capture on noisy factory floors where switching power supplies inject common-mode noise onto the analog lines.
موصى به
Factory-Automation Analog Input Modules
In factory-automation analog-input modules the ADS7810UB provides 800 kHz throughput on parallel data, simplifying DSP-free interfacing with microcontrollers and PLCs. The 28-SOIC package is easy to route on through-hole-compatible backplanes, and 12-bit resolution is appropriate for low-cost automation nodes where 16-bit precision is unnecessary. The 69 dB SINAD floor and ±3/4 LSB INL maximum keep linearity tight for servo-loop controllers reading position-sensor outputs.
موصى به
Medical Instrumentation Signal Acquisition
The ADS7810UB suits medical instrumentation front ends for moderate-dynamic-range signals such as patient monitors and bench-top laboratory equipment. The bipolar ±10 V input captures analog signal chains well-conditioned by op-amp gain stages, while the 800 kHz sample rate supports 50 kHz+ signal bandwidths required for ECG, pulse-oximeter SpO2 processing, and other diagnostic modalities. The internal reference eliminates drift and noise sources associated with external references, improving calibration stability.
موصى به
PLC Analog Front-End Cards
PLC analog front-end cards benefit from the ADS7810UB's parallel-output interface, which lets designers trigger simultaneous conversion across multiple parts with the /CONVST pin for synchronized acquisition. Its ±10 V input range matches the standardized analog input range common in PLC analog modules, eliminating the need for scaling resistors, while the industrial -40 °C to +85 °C temperature range ensures reliable operation in cabinets and on-machine installations.
موصى به
Multiplexed Multi-Channel DAQ Boards
In multi-channel data-acquisition boards the ADS7810UB pairs with a front-end multiplexer, and its 800 kHz sample rate plus 1.25 µs throughput allows the mux to switch between 16-32 channels while still achieving single-digit-kHz per-channel update rates. The 12-bit resolution is adequate for vibration, acoustic, and machine-condition monitoring. The wide-body 28-SOIC package provides thermal headroom for sustained conversions under high mux-switching duty cycles.
موصى به
Generic Industrial Sensor Digitizer
The ADS7810UB also operates as a generic 12-bit digitizer for industrial sensor outputs such as load cells, pressure transducers, and strain gauges following gain-stage signal conditioning. The SAR architecture provides single-shot acquisition without pipeline delay, simplifying triggering and event-capture logic. Its bipolar input range, robust SOIC packaging, and industrial temperature grade make it a stable workhorse for cost-sensitive sensor-interface boards.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADS7810UB — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADS7810UB/1K | ADS7810UB-E4 | ADS7810U/1KG4 | ADS7808UB/1K | ADS7805PB | ADS7807PBG4 |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-SOIC (DW) - wide body | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 16 bits | 16 bits |
| Sampling Rate | 800 kHz | 800 kHz | 800 kHz | 800 kHz | 200 kHz | 100 kHz | 40 kHz |
| Input Range | ±10 V | ±10 V | ±10 V | ±10 V | 0-5 V unipolar | ±10 V | ±10 V |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR | SAR |
| Internal Reference | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Output Interface | Parallel 12-bit | Parallel 12-bit | Parallel 12-bit | Parallel 12-bit | Parallel 12-bit | Parallel 16-bit | Parallel 16-bit |
| Automotive Grade (AEC-Q100) | No | No | No | No | No | No | No |
أبرز الفروقات
- Highest sample-rate 12-bit ±10 V SAR available in the TI ADS78xx SOIC family (مقابلADS7808UB/1K)
- Bipolar ±10 V input range as standard, not custom-scaled (مقابلADS7808UB/1K)
- Step-up in resolution available in the same 28-SOIC footprint (مقابلADS7805PB)
ملاحظات التصميم
The ADS7810UB requires +5 V analog and digital supplies plus -5 V analog supply for the bipolar ±10 V input range. Use a 10 µF tantalum in parallel with a 0.1 µF ceramic capacitor on each supply pin as close to the package as possible. Estimate: at 800 kHz sample rate the supply current is a single-digit mA, but VSS current can be higher at full-scale negative inputs - allocate at least a 100 mA linear regulator for VSS to maintain regulation under worst-case negative excursions.
Route analog and digital grounds on separate planes that join at a single point near the AGND pin of the ADS7810UB. Keep the analog input trace short and guard it with AGND on both sides; route digital output buses away from the analog inputs to avoid coupling clock edges onto the measured signal. Place the REFCAP and CAP bypass capacitors as physically close to their respective pins as the 28-SOIC footprint permits.
Ensure /CONVST is a clean rising edge with sub-20 ns rise time; any ringing or ringing-induced false-trigger will skew acquisition. For multi-ADC synchronous sampling, share a buffered /CONVST to all ADCs and length-match the trace to within 5 mm. The /BUSY pin can be observed at the digital side to detect end-of-conversion, eliminating software polling latency in deterministic data-acquisition loops.
Do not exceed the ±12 V absolute-maximum analog input rating or the converter will suffer permanent damage. When driving the input from a low-impedance op-amp output, ensure the amplifier can drive the 100 pF internal switching-capacitor kickback without oscillation. Avoid using the ADS7810UB below -40 °C or above +85 °C - the datasheet warrants only this industrial range, not AEC-Q100 automotive qualification.
معلومات الامتثال
Texas Instruments RoHS-compliance confirmed per product datasheet family; AEC-Q100 not qualified, so choose automotive-grade TI SARs separately. Halogen-free status not explicitly stated on product page.
