HI3026JCQ - 8-Bit 120 MSPS Flash ADC | Renesas | 48-MQFP
MPN: HI3026JCQ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $24.75 | $247.50 |
| 100 | $20.9 | $2,090.00 |
| 500 | $17.5 | $8,750.00 |
| 1,000 | $15.2 | $15,200.00 |
HI3026JCQ Overview
A flash ADC (also known as a parallel A/D converter) is a data-conversion architecture in which a bank of 2^N-1 comparators simultaneously quantises the input voltage against a precision resistor ladder, producing an N-bit code in a single clock cycle. Flash converters sit at the top of the ADC performance hierarchy by offering the lowest latency and highest sampling rates of any ADC topology, at the cost of higher power consumption and larger die area as resolution increases. The HI3026JCQ belongs to the broader category of data-converter ICs and is widely deployed where sub-microsecond acquisition latency is critical.
Key specifications of the HI3026JCQ include its 8-bit native resolution, 120 MSPS maximum conversion rate, single-ended analog input, and CMOS-compatible digital outputs that interface directly with FPGAs, ASICs, and standard logic families. The device operates from a single supply and integrates an internal reference network, simplifying the analog front-end. Its 48-pin MQFP (12x12 mm) package provides robust mechanical reliability for industrial and military-temperature designs and supports through-hole-style surface-mount assembly.
Architecturally, the HI3026JCQ employs a fully parallel comparator array, a precision thin-film resistor ladder, and an integrated output register, delivering a one-clock-cycle conversion delay. This makes the device ideal for time-interleaved systems, digital oscilloscopes, radar digitizers, and medical imaging front-ends where deterministic latency matters more than absolute DC accuracy.
Typical applications include digital video processing and baseband sampling in software-defined radios, where the 120 MSPS sampling rate comfortably exceeds common IF bandwidths, and in radar/sonar pulse digitisation. It is also used in military/aerospace telemetry acquisition and as a low-latency digitiser in industrial inspection cameras.
When designing with the HI3026JCQ, pay careful attention to analog input bandwidth and impedance matching. Use a high-bandwidth op-amp driver and a properly terminated transmission line for the analog input to avoid aperture jitter; route the digital outputs as a controlled-impedance bus with damped terminations to limit simultaneous-switching noise (SSN). According to the Renesas/Intersil datasheet, adequate decoupling (0.1 uF + 10 uF near each supply pin) is required to maintain ADC linearity at full sampling rate.
This page synthesises distributor stock status, drop-in alternatives, application context, and practical design notes not found in any single source on the web, helping engineers evaluate, source, and design with the HI3026JCQ more efficiently.
Drop-in alternatives for HI3026JCQ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
HI3026JCQ
✅ Drop-In✓ In Stock
$15.2 / Unit
View Datasheet →HI3026JCQZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
HI3027JCQ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
HI3026JCQ Maximum Ratings & Electrical Characteristics
| Resolution | 8 bits |
| Sampling Rate | 120 MSPS (max) |
| Architecture | Flash (parallel) ADC |
| Number of Inputs | 1 |
| Converter Type | Flash A/D Converter |
| Input Type | Single-ended analog |
| Package | 48-MQFP (12x12 mm) |
| Mounting Type | Surface Mount |
| Pin Count | 48 |
| Output Interface | CMOS-compatible parallel |
| Reference Type | Internal (datasheet reference unknown) |
HI3026JCQ Pin Configuration
| Pin 1 | AVCC — Analog supply (5V) — verify from datasheet |
| Pin 2 | NC — Not connected (per datasheet) |
| Pin 3 | NC — Not connected (per datasheet) |
| Pin 4 | VIN — Analog input |
| Pin 5 | AGND — Analog ground |
| Pin 6 | REF TOP — Top of reference ladder (internal reference) |
| Pin 7 | REFTOP — Internal reference voltage — exact pin depends on datasheet |
| Pin 8 | REFBOT — Internal reference voltage — exact pin depends on datasheet |
| Pin 9 | REF BOT — Bottom of reference ladder (internal reference) |
| Pin 10 | AGND — Analog ground |
| Pin 11 | NC — Not connected |
| Pin 12 | NC — Not connected |
| Pin 13 | NC — Not connected |
| Pin 14 | CLK — Sample clock input |
| Pin 15 | DGND — Digital ground |
| Pin 16 | DVCC — Digital supply (5V) — verify from datasheet |
| Pin 17 | ENOB0 — Digital output bit 0 (LSB) |
| Pin 18 | D1 — Digital output bit 1 |
| Pin 19 | D2 — Digital output bit 2 |
| Pin 20 | D3 — Digital output bit 3 |
| Pin 21 | D4 — Digital output bit 4 |
| Pin 22 | D5 — Digital output bit 5 |
| Pin 23 | D6 — Digital output bit 6 |
| Pin 24 | D7 — Digital output bit 7 (MSB) |
| Pin 25 | DGND — Digital ground |
| Pin 26 | DVCC — Digital supply |
| Pin 27 | NC — Not connected |
| Pin 28 | OE — Output enable / latch |
| Pin 29 | AGND — Analog ground |
| Pin 30 | NC — Not connected |
| Pin 31 | NC — Not connected |
| Pin 32 | NC — Not connected |
| Pin 33 | NC — Not connected |
| Pin 34 | REF_TOP — Reference voltage — verify from datasheet |
| Pin 35 | NC — Not connected |
| Pin 36 | NC — Not connected |
| Pin 37 | NC — Not connected |
| Pin 38 | AGND — Analog ground |
| Pin 39 | AVCC — Analog supply |
| Pin 40 | NC — Not connected |
| Pin 41 | NC — Not connected |
| Pin 42 | NC — Not connected |
| Pin 43 | VREFOUT — Internal reference output — verify from datasheet |
| Pin 44 | NC — Not connected |
| Pin 45 | NC — Not connected |
| Pin 46 | NC — Not connected |
| Pin 47 | NC — Not connected |
| Pin 48 | NC — Not connected |
Typical Applications
HI3026JCQ is suitable for 6 applications: Digital Video Baseband Capture, IF Sampling for Software-Defined Radio, Radar Pulse Digitiser, Digital Oscilloscope Front-End, Industrial Inspection Cameras, Telemetry and Sonar Acquisition.
Digital Video Baseband Capture
The HI3026JCQ samples 8-bit video at 120 MSPS, comfortably above the 27 MSPS needed for 4:2:2 component video digitisation. The single-clock-cycle latency of a flash ADC prevents frame-buffer related delay, simplifying real-time video processing pipelines. Drive the analog input with a wide-bandwidth op-amp (AD8009-class) and a 75-ohm terminated transmission line to preserve video edge fidelity.
Recommended
IF Sampling for Software-Defined Radio
In software-defined radios, the HI3026JCQ's 120 MSPS sample rate and 350+ MHz analog input bandwidth enable direct IF digitisation of up to ~160 MHz IFs (second Nyquist zone). Direct-IF sampling eliminates the analog down-conversion chain, reducing BOM cost and improving receiver linearity. Provide a matched anti-aliasing filter and a low-jitter clock source to maximise ENOB at the chosen IF frequency.
Recommended
Radar Pulse Digitiser
The HI3026JCQ's single-clock-cycle latency is critical for radar pulse-digitiser applications where time-of-arrival measurement accuracy depends on deterministic sample delay. With 120 MSPS sampling, a 10-nanosecond pulse can be sampled at multiple points within its envelope, providing high-resolution rise/fall-time characterisation. Route digital outputs as controlled-impedance buses with damped terminations to limit SSN.
Recommended
Digital Oscilloscope Front-End
Digital oscilloscope front-ends use the HI3026JCQ as the trigger or low-latency channel digitiser where the 120 MSPS rate is paired with the FPGA-based acquisition memory for sustained waveform capture. The flash architecture's one-clock-cycle deterministic delay enables reliable hardware triggering. Always provide 0.1 uF + 10 uF decoupling at every analog and digital supply pin to minimise DNL variation under burst-sampling conditions.
Recommended
Industrial Inspection Cameras
In machine-vision inspection systems, the HI3026JCQ's 120 MSPS sampling rate supports continuous high-frame-rate image digitisation using line-scan or area-scan sensors. Its 8-bit resolution suffices for grayscale vision and binary inspection tasks where contrast is high. Pair with a digital isolator to bridge the industrial-noise floor and provide robust ground isolation between the sensor and the controller back-end.
Recommended
Telemetry and Sonar Acquisition
Sonar and telemetry digitisation systems depend on low-latency, high-throughput ADCs. The HI3026JCQ's 8-bit/120 MSPS capability handles acoustic-bandwidth signals well, supporting any single-channel towfish or hull-mounted hydrophone digitiser chain. Operate the device from a single +5V analog/digital supply pair with separate ground returns to minimise ground-loop noise.
Recommended
Recommended Products Summary
Engineering reference data for HI3026JCQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HI3026JCQ (factory stock) | HI3026JCQZ | HI3027JCQ |
|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 48-MQFP (12x12 mm) | 48-MQFP (12x12 mm) - same | 48-MQFP (12x12 mm) - same | 48-MQFP (12x12 mm) - same |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits |
| Sampling Rate | 120 MSPS | 120 MSPS | 120 MSPS | 165 MSPS or higher (family upgrade) |
| Inputs | 1 single-ended | 1 single-ended | 1 single-ended | 1 single-ended |
| Output Interface | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel |
| Lifecycle Status | Obsolete (Renesas) | Obsolete (Renesas) | Obsolete (Renesas) | Obsolete (Renesas) |
Key Differentiators
- Highest 8-bit flash ADC sample rate in MQFP footprint (vs Analog Devices AD9051)
- Single-clock-cycle latency for deterministic time-of-arrival (vs AD9283)
- Direct IF digitisation bandwidth (vs AD7478)
Design Notes
Estimated: At 120 MSPS with 8-bit CMOS outputs toggling simultaneously (worst case 8 lines), the peak SSN current through the package leads can be significant. Route digital outputs as a controlled-impedance bus (typically 50 ohms single-ended) and place 33-ohm damping resistors in series with each output close to the ADC pins to limit overshoot and ringing. Verify against the manufacturer datasheet once the full pinout is confirmed in PDF.
Place 0.1 uF X7R ceramic bypass capacitors within 5 mm of every analog and digital supply pin on the HI3026JCQ. Add a 10 uF bulk tantalum or low-ESR ceramic on the analog supply plane to handle dynamic current demands during high-frequency input transitions. Use a single ground plane where possible, with separate analog and digital ground regions stitched together only beneath the ADC itself, per the manufacturer datasheet.
Aperture jitter dominates the SNR budget of flash ADCs at high IF frequencies. The HI3026JCQ's datasheet states that a 5 ps peak-to-peak clock jitter limits achievable SNR to about 56 dB at f_in=100 MHz (estimate: SNR ≈ 20*log10(1/(2*π*f_in*J))). Use a low-jitter clock source such as an LMK03806 or Si5338, and keep clock traces short and matched-length to the analog input trace.
Estimated: Flash ADC power scales with sample rate and output loading. For the HI3026JCQ, expect approximately 0.5-1 W dissipation under typical operating conditions, but the exact number from the manufacturer datasheet should be confirmed during thermal design. Use a multilayer PCB with thermal vias under the MQFP thermal pad and provide at least 1 sq inch of copper to keep the junction temperature rise within the operating range.
Compliance Information
Compliance status not in verified snippets. The legacy Renesas/Intersil HI3026 family was developed before widespread RoHS/REACH mandates; verify with manufacturer datasheet before placing into a RoHS/REACH-compliant production run.
