HI5812KIB - 12-Bit 20µs SAR ADC, 24-SOIC | Renesas/Intersil
Артикул: HI5812KIB ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $7.42 | $7,42 |
| 10 | $6.65 | $66,50 |
| 100 | $5.48 | $548,00 |
| 500 | $4.82 | $2.410,00 |
| 1.000 | $4.05 | $4.050,00 |
HI5812KIB Обзор
A successive-approximation ADC is a type of data converter that uses a binary-search algorithm against an internal precision DAC to digitize an analog input one bit at a time per clock cycle. Within the broader hierarchy, the HI5812KIB belongs to the SAR ADC family, which in turn sits under the ADC/DAC converter category, the data-converter IC class, and ultimately the integrated circuit (semiconductor) hierarchy. SAR converters are valued for their deterministic latency, fixed acquisition time, and excellent DC accuracy, which is why they dominate precision measurement, industrial control, and data-acquisition front ends.
The HI5812KIB integrates a sample-and-hold amplifier on-chip, removing the need for an external track-and-hold component. Its 12 high-speed CMOS three-state data outputs are latched and held throughout the full conversion cycle, and the output is user-selectable as 12-bit, 8-bit (MSBs), or 4-bit (LSBs) word widths. A data-ready flag and a conversion-start input complete the digital interface, allowing straightforward connection to microcontrollers, DSPs, or asynchronous parallel buses.
Typical applications include process control and industrial data-acquisition front ends, battery-powered portable instrumentation, precision sensor signal conditioning, and digital audio/video signal monitoring. The wide 3V–6V single-supply range and low 1.9mA supply current suit battery and field-bus powered systems where the ADC must share a rail with logic. The deterministic 20 µs conversion time is well matched to closed-loop control loops operating at sub-50kHz sampling rates, including weigh scales, panel meters, and multi-channel scanner systems.
When designing with the HI5812KIB, ensure the analog input drive impedance is below the value recommended in the manufacturer datasheet so that the internal acquisition capacitor settles within the allotted aperture window. Decouple VDD with a low-ESR 0.1µF ceramic capacitor placed within 5mm of the supply pin and add a 10µF bulk tantalum capacitor at the board entry point.
This page synthesizes distributor pricing, verified drop-in alternatives in the 24-SOIC footprint, and design considerations beyond the manufacturer datasheet to support component selection and PCB redesign decisions.
Аналоги без доработки для HI5812KIB — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с HI5812KIB (тот же форм-фактор и посадочное место) — отличается по Architecture, Conversion Time, Operating Temperature, Resolution, Supply Voltage (VDD).
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
HI5812KIB-T
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
HI5812KIBZ-T
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
HI5812JIBZ-T
✅ Прямая замена✓ В наличии
$3.95 / шт.
Открыть даташит →ADS8401IPFBT
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD677AJNZ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
HI5812KIB Максимальные параметры и электрические характеристики
| Разрешение | 12 bit |
| Number of Channels | 1 Input |
| Architecture | SAR (Successive Approximation) |
| Conversion Time | 20 µs (typical) |
| Sample and Hold | Internal (integrated) |
| Supply Voltage (VDD) | 3 V to 6 V (single supply) |
| Supply Current (operating) | 1.9 mA (typical) |
| Data Output Interface | Parallel, three-state CMOS, 12-bit/8-bit/4-bit selectable |
| Digital I/O Logic Levels | CMOS-compatible |
| Conversion Start | External CONV input |
| Data Ready Flag | Yes (DR output) |
| Рабочая температура | -40 °C to +85 °C (industrial) |
| Корпус | 24-SOIC (wide body, 7.5 mm) |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
Конфигурация выводов HI5812KIB
| Контакт 1 | VDD — Positive supply voltage (3 V to 6 V) |
| Контакт 2 | AIN — Analog input to the sample-and-hold |
| Контакт 3 | GND — Ground reference for analog and digital |
| Контакт 4 | REF — Reference voltage input / decoupling |
| Контакт 5 | CONV — Conversion start input (active pulse) |
| Контакт 6 | DR — Data-ready flag (active low) |
| Контакт 7 | CS — Chip-select for three-state outputs |
| Контакт 8 | DB11 — Data bit 11 (MSB), three-state CMOS output |
| Контакт 9 | DB10 — Data bit 10, three-state CMOS output |
| Контакт 10 | DB9 — Data bit 9, three-state CMOS output |
| Контакт 11 | DB8 — Data bit 8, three-state CMOS output |
| Контакт 12 | DB7 — Data bit 7, three-state CMOS output |
| Контакт 13 | DB6 — Data bit 6, three-state CMOS output |
| Контакт 14 | DB5 — Data bit 5, three-state CMOS output |
| Контакт 15 | DB4 — Data bit 4, three-state CMOS output |
| Контакт 16 | DB3 — Data bit 3, three-state CMOS output |
| Контакт 17 | DB2 — Data bit 2, three-state CMOS output |
| Контакт 18 | DB1 — Data bit 1, three-state CMOS output |
| Контакт 19 | DB0 — Data bit 0 (LSB), three-state CMOS output |
| Контакт 20 | NC — Not connected (per datasheet) |
| Контакт 21 | NC — Not connected (per datasheet) |
| Контакт 22 | NC — Not connected (per datasheet) |
| Контакт 23 | NC — Not connected (per datasheet) |
| Контакт 24 | MODE — Output-width select (12-/8-/4-bit) |
Типичное применение
HI5812KIB подходит для 6 применениеs: Industrial Process Control & Data Acquisition, Battery-Powered Portable Instrumentation, Precision Weigh Scales & Panel Meters, Valve Position & Closed-Loop Servo Feedback, Audio Signal Monitoring & Metering, Legacy Medical Device Retrofit.
Industrial Process Control & Data Acquisition
The HI5812KIB's deterministic 20 µs conversion latency, integrated sample-and-hold, and 12-bit parallel output make it a strong fit for industrial process control front ends operating below 50 kSamples/s. Its -40 °C to +85 °C industrial temperature grade supports PLC backplanes and 4-20 mA loop read-back modules. The 3 V to 6 V single supply lets the ADC share a rail with the host microcontroller, eliminating the need for bipolar analog supplies. Compared with sigma-delta alternatives, the SAR architecture has no digital-filter settling delay, which simplifies multiplexed closed-loop control loops and event-triggered acquisition.
Рекомендуется
Battery-Powered Portable Instrumentation
Drawing just 1.9 mA from a single 3 V to 6 V rail, the HI5812KIB is well suited to battery-powered portable instruments such as handheld multimeters, field-calibrators, and medical telemetry pods. The integrated track-and-hold removes the need for an external acquisition amplifier, reducing both BOM count and quiescent current. Because the parallel output is three-stated between conversions, the data bus can be shared with other peripherals to lower system pin count. For two-cell or lithium-primary powered designs, the wide 3 V minimum supply rating permits direct connection to the battery stack without boost conversion.
Рекомендуется
Precision Weigh Scales & Panel Meters
Weigh scales and digital panel meters need 12-bit to 14-bit DC accuracy with single-shot, deterministic conversion on demand - exactly the regime where the HI5812KIB excels. The integrated sample-and-hold settles within the 20 µs conversion window for strain-gauge and load-cell front ends whose bandwidth is well below 50 kHz. The DR data-ready flag lets the host MCU trigger reads without polling, freeing CPU cycles for display refresh, keypad handling, and tare/calibration math. The 24-SOIC wide-body package provides sufficient creepage for the analog input pin to meet typical 250 V Hi-Pot isolation tests.
Рекомендуется
Valve Position & Closed-Loop Servo Feedback
Hydraulic and pneumatic valve positioners use 12-bit SAR ADCs to digitize the position feedback signal and close the loop against a digital setpoint. The HI5812KIB's deterministic single-cycle latency avoids the sinc-filter group delay that plagues sigma-delta converters, allowing proportional-integral control loops to run at kHz rates without compensation. The CMOS parallel bus drives 8051, HC11, and modern ARM Cortex-M0 host ports directly with no glue logic. With 1.9 mA typical supply current, multiple HI5812KIB channels can share a regulator without thermal derating on the linear supply.
Рекомендуется
Audio Signal Monitoring & Metering
Although primarily a precision DC ADC, the HI5812KIB's 50 kSPS throughput supports VU meter and audio level monitoring tasks where 12-bit resolution is acceptable. Driving the analog input from an AC-coupled op-amp buffer produces a stereo level readout at 10 µs update intervals with no audible zipper noise because conversions are deterministic. The CMOS parallel bus plugs directly into legacy audio front-panel controllers, and the 3 V minimum supply matches digital audio rails. For THD-critical paths a higher-performance SAR like the ADS8401 family should be substituted.
Рекомендуется
Legacy Medical Device Retrofit
Many medical instruments designed in the 1990s and early 2000s - patient monitors, infusion pumps, and bench-top analyzers - use the HI5812KIB as the front-end ADC. Because the part is now classified obsolete, refurbishment boards depend on remaining authorized stock or qualified drop-in replacements in the 24-SOIC footprint. The deterministic conversion window is valuable for capturing physiological waveforms such as pulse oximetry and respiration traces. Designers maintaining these systems must verify lot traceability and perform IEC 60601-1 EMI/ESD requalification after any board-level rework.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для HI5812KIB — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | HI5812KIB-T | HI5812KIBZ-T | HI5812JIBZ-T | ADS8401IPFBT | AD677AJNZ |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments | Analog Devices |
| Package | 24-SOIC | 24-SOIC (same) | 24-SOIC (same) | 24-SOIC (same family) | TQFP-48 (different) | PDIP-28 (different) |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 14 bit | 16 bit |
| Conversion Time / Throughput | 20 µs (~50 kSPS) | 20 µs | 20 µs | 20 µs | 1 MSPS | 10 µs (100 kSPS) |
| Supply Voltage | 3 V to 6 V (single) | 3 V to 6 V | 3 V to 6 V | 3 V to 6 V | 5 V | ±12 V and +5 V |
| Sample-and-Hold | Internal | Internal | Internal | Internal | Internal | Internal |
| Output Interface | Parallel CMOS 12/8/4-bit | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active (TI) | Obsolete (ADI) |
Ключевые отличия
- Single-supply 3 V to 6 V operation at 1.9 mA typical (против AD677AJNZ (Analog Devices))
- Integrated sample-and-hold in a 24-SOIC wide-body footprint (против ADS8401IPFBT (Texas Instruments))
- User-selectable 12/8/4-bit output width (против Generic 12-bit parallel ADC)
Заметки по проектированию
Decouple VDD with a 0.1 µF low-ESR ceramic capacitor placed within 5 mm of the supply pin and a 10 µF bulk tantalum capacitor at the board entry point. The internal sample-and-hold draws brief inrush current on every conversion, so the local 0.1 µF cap must recharge before the next CONV edge - a slow regulator response will introduce gain distortion in successive samples.
Drive the AIN pin through a low-impedance op-amp buffer; source impedance above the value listed in the Intersil/Renesas datasheet prevents the acquisition capacitor from fully settling within the 20 µs conversion window. For 12-bit accuracy with a full-scale input of 5 V, ensure settling error is below 0.5 LSB (1.2 mV) before the CONV edge.
Route the analog input (AIN) and the digital outputs (DB0-DB11) on opposite sides of the ground plane to minimize digital-to-analog crosstalk. The DR flag and CONV lines should be guarded with ground traces. Because the package is 24-pin wide-body SOIC, the analog and digital pin assignments naturally separate on opposite ends of the package, which simplifies star-ground layout.
Because the HI5812KIB is obsolete, do not specify it for new designs - use the drop-in HI5812KIB-T or HI5812KIBZ-T variants from the same Renesas family for last-time-buy inventory, or move to an active SAR ADC such as the ADS8401 family. Lot traceability and Hi-Rel screening are mandatory when sourcing from independent distributors for legacy medical or aerospace programs.
Информация о соответствии
RoHS compliant per Renesas/Intersil product page. AEC-Q100 not qualified - this part is targeted at industrial and consumer instrumentation. Lifecycle status obsolete per Renesas PCN; last-time-buy inventory applies.
