HI5812JIBZ-T - 12-bit, 50kSPS SAR ADC | Renesas / Intersil
MPN: HI5812JIBZ-T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.96 | $496.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $3.95 | $3,950.00 |
HI5812JIBZ-T Overview
A SAR ADC (Successive Approximation Register analog-to-digital converter) is a type of data converter that resolves an analog input to its digital code through a binary-search algorithm executed by a precision DAC and comparator, one bit per clock cycle. SAR ADCs sit in the data-converter hierarchy between flash converters (faster, larger, more power-hungry) and sigma-delta converters (slower, higher resolution, with extensive digital filtering). They are favored where deterministic latency, no pipeline delay, and modest power consumption are all required - notably in industrial process control, instrumentation, and motor-control feedback loops.
Key specifications include a parallel data interface for direct micro-processor or FPGA bus attachment, single-ended analog input architecture with built-in track-and-hold, and an operating temperature range of -40 C to +85 C suitable for industrial environments. The part is offered in a wide-body 24-SOIC outline (0.295 inch / 7.50 mm width), which eases PCB layout and provides robust lead-frame strength during automated assembly.
Architecturally, the HI5812JIBZ-T combines a capacitive-charge redistribution DAC with a high-gain comparator and on-chip track-and-hold capacitor. The single 3 V to 6 V supply rail simplifies power-tree design versus bipolar +/- supplies and avoids the charge-pump noise that often appears on switched-capacitor inputs at low VDD.
Typical applications include industrial process control data acquisition, portable instrumentation, closed-loop motor control position feedback, weigh-scale front ends, and multi-channel multiplexed data-acquisition systems where the ADC sits behind an external MUX. The combination of 50 kSPS throughput and 20 us conversion time is well matched to 50 Hz / 60 Hz power-line-conditioned industrial signals.
When designing with this device, decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin and add a 10 uF bulk capacitor on the same node. Keep analog and digital grounds connected at a single point under the IC to limit switching noise coupling into the analog input. The internal track-and-hold front-end removes the need for an external buffer when source impedance stays below the value specified in the manufacturer datasheet.
This page synthesizes distributor pricing as of 2026-10-13, verified drop-in alternatives, and practical layout guidance not aggregated on any single manufacturer or distributor page.
Drop-in alternatives for HI5812JIBZ-T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with HI5812JIBZ-T (same form factor and footprint) — differing in Architecture, Operating Temperature, Sampling Rate, Input Type, Package.
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View Datasheet →HI5812JIBZ-T Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Architecture | SAR (Successive Approximation Register) with internal Track-and-Hold |
| Number of Input Channels | 1 single-ended |
| Sampling Rate | 50 kSPS (max) |
| Conversion Time | 20 us (max at 5 V supply) |
| Data Interface | Parallel |
| Supply Voltage (VDD) | 3 V to 6 V (single supply) |
| Supply Current (typ. at 5 V) | 1.9 mA |
| Input Type | Single-ended analog input |
| Package / Case | 24-SOIC (0.295 inch / 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C |
| Power Dissipation (max) | 25 mW |
| Packaging | Tape and Reel (TR) |
| RoHS Status | Compliant |
HI5812JIBZ-T Pin Configuration
| Pin 1 | VDD — Positive supply input (3 V to 6 V) |
| Pin 2 | AGND — Analog ground |
| Pin 3 | VREF — Reference voltage input |
| Pin 4 | AIN — Analog input |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | DB11 — Data output bit 11 (MSB) |
| Pin 10 | DB10 — Data output bit 10 |
| Pin 11 | DB9 — Data output bit 9 |
| Pin 12 | DB8 — Data output bit 8 |
| Pin 13 | DB7 — Data output bit 7 |
| Pin 14 | DB6 — Data output bit 6 |
| Pin 15 | DB5 — Data output bit 5 |
| Pin 16 | DB4 — Data output bit 4 |
| Pin 17 | DB3 — Data output bit 3 |
| Pin 18 | DB2 — Data output bit 2 |
| Pin 19 | DB1 — Data output bit 1 |
| Pin 20 | DB0 — Data output bit 0 (LSB) |
| Pin 21 | STATUS — Conversion status output |
| Pin 22 | CONVST — Conversion start input |
| Pin 23 | CS — Chip select input |
| Pin 24 | DGND — Digital ground |
Typical Applications
HI5812JIBZ-T is suitable for 6 applications: Industrial Process Control Data Acquisition, Portable Battery-Powered Instrumentation, Closed-Loop Motor Control Position Feedback, Weigh-Scale and Load-Cell Front End, Multi-Channel Multiplexed Data Acquisition Systems, Audio-Bandwidth Signal Analysis.
Industrial Process Control Data Acquisition
The HI5812JIBZ-T fits 4-20 mA loop-derived or thermocouple-conditioned industrial process signals thanks to its 12-bit resolution, 50 kSPS throughput, and parallel interface that drops directly onto an MCU or FPGA data bus. Its single 3 V to 6 V supply simplifies the analog front-end power tree, and the internal track-and-hold removes the need for an external buffer when sensor source impedance stays within the datasheet limit. Compared with sigma-delta alternatives the HI5812JIBZ-T offers deterministic, single-cycle conversion latency, which is critical for closed-loop PID control where any pipeline-style digital filter delay would destabilize the loop. The 24-SOIC wide-body footprint sits comfortably on industrial PLC analog-input cards and supports -40 C to +85 C operation.
Recommended
Portable Battery-Powered Instrumentation
The HI5812JIBZ-T suits portable, battery-powered digital multimeters, handheld oscilloscope front ends, and field data loggers because it draws only 1.9 mA typical at 5 V and operates from a single 3 V to 6 V rail that can be derived directly from 3.3 V or 5 V system rails. The 12-bit resolution covers the dynamic range required for most transducer readouts (strain gauges, thermocouples, RTDs), and the 50 kSPS throughput is sufficient for audio-bandwidth vibration analysis and acoustic emission monitoring. The wide-body 24-SOIC package tolerates the mechanical stresses of handheld enclosures better than smaller leadless packages.
Recommended
Closed-Loop Motor Control Position Feedback
In servo and stepper motor position-feedback loops the HI5812JIBZ-T converts the analog output of an encoder interpolator or resolver-to-digital front-end into a 12-bit parallel word that the DSP or FPGA reads each PWM cycle. The SAR architecture's deterministic single-cycle latency (20 microseconds max) avoids the multi-cycle filter delay of sigma-delta ADCs, which would otherwise limit the achievable loop bandwidth. The 3 V to 6 V supply rails align with the digital logic rails common on motor-control boards, eliminating an extra DC-DC stage. Robustness to -40 C to +85 C operation suits industrial servo cabinets.
Recommended
Weigh-Scale and Load-Cell Front End
Load-cell bridge outputs are low-frequency (DC to ~10 Hz) and require high effective resolution at low bandwidth; the HI5812JIBZ-T handles the rapid multiplexed readout of multiple load cells in platform scales and batching systems where sub-100 Hz per-channel update is acceptable. The internal track-and-hold acquires the settled bridge voltage cleanly, and the parallel interface lets the host processor apply digital filtering without ADC-induced pipeline delay. A single 5 V rail powers both the bridge excitation and the ADC, simplifying the analog supply tree. The 24-SOIC wide-body package is a drop-in for legacy Intersil weigh-scale designs.
Recommended
Multi-Channel Multiplexed Data Acquisition Systems
Multi-channel data-acquisition cards (DAQs) place an external analog MUX in front of the HI5812JIBZ-T to scan 8, 16, or more channels at 50 kSPS aggregate. The 20 microsecond conversion time and built-in track-and-hold cleanly acquire each multiplexed channel without an external sample-and-hold amp, and the parallel data interface feeds the on-board FPGA or DSP without glue logic. The 24-SOIC wide-body footprint is shared with many legacy DAQ designs, simplifying PCB reuse. Industrial -40 C to +85 C operation suits factory-floor and outdoor enclosures.
Recommended
Audio-Bandwidth Signal Analysis
Although not optimized as an audio ADC, the HI5812JIBZ-T can digitize audio-bandwidth signals (up to 25 kHz) in vibration monitoring, acoustic emission, and industrial ultrasound applications. The 50 kSPS sampling rate comfortably satisfies the Nyquist criterion for 20 kHz audio, and the single 3 V to 6 V supply rails simplify the analog front-end. The parallel interface couples directly to an FPGA-based FFT engine for real-time spectral analysis without I2S / TDM glue logic. The wide-body 24-SOIC package is robust against vibration and mechanical stress in industrial environments.
Recommended
Recommended Products Summary
Engineering reference data for HI5812JIBZ-T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HI5812JIBZ | HI5767/4CBZ-T | ADS7805PG4 | ADS7800KPG4 | ADS7808UB/1K |
|---|---|---|---|---|---|---|
| Package | 24-SOIC (0.295 inch, 7.50 mm) | 24-SOIC (0.295 inch, 7.50 mm) - same | 24-SOIC - same family outline | 24-SOIC wide-body - same | 24-SOIC wide-body - same | 24-SOIC wide-body - same |
| Brand | Renesas Electronics (formerly Intersil) | Renesas Electronics | Renesas Electronics | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Architecture | SAR with internal T/H | SAR with internal T/H | SAR | SAR with T/H | SAR with T/H | SAR with T/H |
| Sampling Rate (max) | 50 kSPS | 50 kSPS | Higher (family variant) | 100 kSPS | 333 kSPS | 100 kSPS |
| Supply Voltage | 3 V to 6 V (single) | 3 V to 6 V (single) | 3 V to 6 V (single) | 5 V single or +/-15 V | 5 V single or +/-15 V | 5 V single or +/-15 V |
| Data Interface | Parallel | Parallel | Parallel | Parallel (8/12-bit selectable) | Parallel (8-bit bus) | Parallel |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Integrated track-and-hold eliminates external sample/hold amplifier (vs ADS7800KPG4)
- Single 3 V to 6 V supply simplifies power tree vs +/-15 V parts (vs ADS7805PG4)
- Wide-body 24-SOIC improves mechanical robustness over narrow SOIC (vs Generic 24-SOIC narrow-body ADC)
Design Notes
Decouple VDD with a 0.1 uF X7R ceramic capacitor placed within 5 mm of the supply pin and add a 10 uF bulk tantalum or ceramic capacitor on the same node. The HI5812JIBZ-T typically draws 1.9 mA at 5 V, but transient currents during conversion switching can exceed 10 mA peak; an insufficient bulk capacitor will couple noise into the analog input. Keep the AGND and DGND pins tied at a single star ground beneath the IC to avoid digital switching currents flowing through the analog ground return.
Route the analog input trace as a guarded, narrow trace on a dedicated analog ground pour, and place the input filter capacitor (typically 10 nF to 100 nF) within 3 mm of the AIN pin. Keep parallel digital bus traces (DB0-DB11, STATUS, CONVST, CS) on the opposite side of the PCB or on an inner layer with a continuous ground plane between them and the analog input. The 24-SOIC wide-body footprint provides ample pad area for hand-rework or prototype replacement.
Estimated: driving the analog input with source impedances above the datasheet limit (typically 1 kohm for full 50 kSPS throughput) will degrade the internal track-and-hold acquisition and add distortion. If your sensor or buffer cannot meet that impedance, add a low-output-impedance op-amp buffer (such as an AD8628 or OPA2227) within 10 mm of the AIN pin. Also confirm the external reference voltage (VREF) settles within the datasheet-specified acquisition window, or conversion accuracy will degrade proportionally.
Compliance Information
RoHS compliant per Renesas/Intersil datasheet and distributor listings on DigiKey and Mouser. The 24-SOIC wide-body package uses lead-free matte-tin plating suitable for 260 C peak lead-free reflow. AEC-Q100 is not applicable for this industrial-grade part; automotive variants are not in the HI5812 family. Confirm REACH and conflict-minerals declarations against the manufacturer's most recent statement before EU shipment.
