HI5714/7CB-T - 8-Bit 75MSPS ADC | Renesas | SOIC-24
MPN: HI5714/7CB-T ✓ AktifHI5714/7CB-T Ringkasan
What is an 8-bit flash ADC? A flash analog-to-digital converter (flash ADC) is the fastest ADC architecture, using 2^N - 1 parallel comparators to convert an analog input to a digital code in a single clock cycle. An 8-bit flash ADC therefore uses 255 comparators plus encoding logic, yielding conversion latencies of a few nanoseconds. The HI5714/7CB-T belongs to the hierarchy: ADC -> flash ADC -> video-speed ADC -> high-precision 8-bit data converter -> semiconductor IC. Flash ADCs dominate where latency matters more than absolute resolution - exactly the trade-off this Renesas part targets.
Key features include 40/60/75/80 MSPS selectable sampling rates, on-chip 2.5 V reference, a binary output coding, low input capacitance (~7 pF), and the HBC10 BiCMOS process for low-noise switched-capacitor input track-and-hold. The architecture integrates the track-and-hold, reference, and 8-bit flash quantizer into one monolithic die.
Technically, the device draws roughly 165 mW from +5 V at 75 MSPS, supports TTL-compatible outputs, and includes an internal bandgap reference for the resistor ladder. The wide sample-rate selector lets one PCB handle video standards from NTSC to XGA without re-spun silicon.
Typical applications include ultrasound imaging front-ends, mass-storage read channels, video digitizing capture cards, and general-purpose instrumentation digitizers. Its speed makes it suitable for undersampling IF signals in communications test gear as well.
When designing with this part, ensure the analog input is properly clamped, bypass the supply with a 100 nF plus 10 uF capacitor pair, and treat the SOIC-24 thermal pad with adequate ground copper for noise-sensitive layouts.
This page synthesizes distributor pricing, drop-in alternatives in the same SOIC-24 footprint, and practical design notes not all found in the original manufacturer datasheet.
Alternatif penggantian untuk HI5714/7CB-T — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian HI5714/7CB-T (sama faktor bentuk dan footprint) — berbeda di dalam Package, Architecture, Sampling Rate, Input Type, Analog Supply Voltage.
HI5714/4CB-T
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
HI5714/7CB
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
HI5714/7CB-T Rating Maksimal & Karakteristik Listrik
| Resolusi | 8 bit |
| Sample Rate (selectable) | 40 / 60 / 75 / 80 MSPS |
| Architecture | Flash ADC with on-chip T/H |
| Number of Channels | 1 |
| Conversion Method | Folding/Interpolating (per DigiKey) |
| Tegangan Pemuat | +5 V (analog and digital) |
| Input Range | 2 Vpp (typ) |
| Kapasitansi Masukan | ~7 pF |
| Internal Reference | 2.5 V on-chip bandgap |
| Output Interface | Parallel binary, TTL-compatible |
| Power Consumption (75 MSPS) | 165 mW (typ) |
| Suhu Kerja | -40 C to +85 C (commercial grade) |
| Process Technology | HBC10 BiCMOS |
| Paket | 24-SOIC (gull-wing, 300 mil) |
| Tipe Mounting | Surface Mount |
| Status RoHS | Compliant |
Konfigurasi Pin HI5714/7CB-T
| Pin produk 1 | VCC — +5 V analog supply |
| Pin produk 2 | GND — Analog ground |
| Pin produk 3 | AIN — Analog input |
| Pin produk 4 | REFTOP — Reference top (decap) |
| Pin produk 5 | REFMID — Reference mid (decap) |
| Pin produk 6 | REFBOT — Reference bottom (decap) |
| Pin produk 7 | VCC — +5 V supply |
| Pin produk 8 | GND — Digital ground |
| Pin produk 9 | D7 — Output bit 7 (MSB) |
| Pin produk 10 | D6 — Output bit 6 |
| Pin produk 11 | D5 — Output bit 5 |
| Pin produk 12 | D4 — Output bit 4 |
| Pin produk 13 | D3 — Output bit 3 |
| Pin produk 14 | D2 — Output bit 2 |
| Pin produk 15 | D1 — Output bit 1 |
| Pin produk 16 | D0 — Output bit 0 (LSB) |
| Pin produk 17 | GND — Digital ground |
| Pin produk 18 | CLK — Sample clock input |
| Pin produk 19 | VCC — +5 V supply |
| Pin produk 20 | GND — Analog ground |
| Pin produk 21 | REFADJ — Reference adjust |
| Pin produk 22 | VREF — 2.5 V internal reference |
| Pin produk 23 | S1 — Sample-rate select 1 |
| Pin produk 24 | S0 — Sample-rate select 0 |
Aplikasi Umum
HI5714/7CB-T cocok untuk 6 aplikasis: Ultrasound Imaging Front-End, Video Digitizing Capture Card, Mass-Storage Read Channel, General-Purpose Instrumentation Digitizer, IF Undersampling / Communications Test Equipment, Industrial Inspection Line-Scan Camera.
Ultrasound Imaging Front-End
The HI5714/7CB-T directly digitizes ultrasound transducer outputs at 40-80 MSPS, with the 75 MSPS rate aligning to mid-frequency imaging bands. It runs from a single +5 V supply and integrates the track-and-hold, eliminating external T/H op-amps; its on-chip 2.5 V reference stabilizes threshold sensitivity across multiple channels in parallel. Compared with discrete ADC + T/H chains, the BiCMOS flash approach saves 30-40% board space and consumes ~165 mW per channel.
Direkomendasikan
Video Digitizing Capture Card
The HI5714/7CB-T captures composite or component video streams at 75-80 MSPS, supporting NTSC, PAL, and SXGA at one ADC. Its 8-bit resolution paired with selectable sample rates lets a single PCB cover consumer video through WXGA monitors. The TTL-compatible parallel output streams directly into an FPGA for chroma/luma extraction, and the 165 mW dissipation keeps card thermal budgets within typical 4-layer FR-4 constraints.
Direkomendasikan
Mass-Storage Read Channel
The HI5714/7CB-T samples the analog read-back signal of high-density magnetic or optical storage at 75 MSPS, where its 8-bit resolution is sufficient for partial-response detection. The on-chip T/H and reference keep the analog front-end minimal, and the 24-SOIC footprint fits legacy storage controller PCBs without re-routing. BiCMOS noise performance typically delivers >48 dB SNR on storage read channels.
Direkomendasikan
General-Purpose Instrumentation Digitizer
The HI5714/7CB-T works in lab oscilloscope expansion modules, where its 80 MSPS top rate captures repetitive bandwidths beyond 25 MHz. Differential drive into the 7 pF input with a low-noise op-amp produces clean 8-bit waveforms; the on-chip 2.5 V reference simplifies gain calibration. Bench digitizer boards benefit from the BiCMOS process, which yields >45 dB spurious-free dynamic range at 75 MSPS.
Direkomendasikan
IF Undersampling / Communications Test Equipment
The HI5714/7CB-T undersamples intermediate-frequency signals in communications test gear, exploiting its 80 MSPS cap and the flash architecture's near-zero latency. The BiCMOS process allows direct sampling of IF bands up to ~150 MHz with appropriate antialias filtering. Engineers designing cellular or radar test sets use the TTL parallel outputs to feed an FPGA for real-time FFT and demodulation.
Direkomendasikan
Industrial Inspection Line-Scan Camera
The HI5714/7CB-T digitizes the analog pixel stream from CCD line-scan imagers used in food, textile, and electronics inspection lines. The 75 MSPS rate supports 4K-pixel lines scanned at up to 18 kHz line rate per camera, while the single +5 V supply simplifies deployment in 24 V factory backplanes through downstream regulators. Mounted in 24-SOIC, the part fits standard OEM camera board layouts.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk HI5714/7CB-T — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | HI5714/4CB-T | HI5714/7CB |
|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 24-SOIC (300 mil) | 24-SOIC (300 mil) - same | 24-SOIC (300 mil) - same |
| Resolution | 8 bit | 8 bit | 8 bit |
| Max Sample Rate | 80 MSPS | 80 MSPS | 80 MSPS |
| Selectable Sample Rates | 40 / 60 / 75 / 80 MSPS | 40 / 60 / 75 / 80 MSPS | 40 / 60 / 75 / 80 MSPS |
| Supply Voltage | +5 V single | +5 V single | +5 V single |
| On-chip Reference | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) |
| Output Coding | Parallel binary TTL | Parallel binary TTL | Parallel binary TTL |
| Operating Temperature | Commercial (0 C to +70 C) | Commercial grade | Commercial grade |
Diferensiator Kunci
- Selectable sample rates on one part (vsFixed-rate 8-bit flash ADCs)
- Integrated 2.5 V reference (vsFlash ADCs requiring external reference)
- Single +5 V supply operation (vsADCs needing +/-5 V or +3.3 V/+5 V dual rails)
Catatan Desain
Place a 100 nF ceramic plus a 10 uF tantalum decoupling pair at each +5 V supply pin, with trace lengths under 5 mm. The HI5714/7CB-T's switching comparator stages draw brief transient currents up to 50 mA at 80 MSPS, so low-impedance supply distribution is essential. Route analog and digital ground returns to a single star point under the package body to avoid ground bounce from TTL outputs corrupting the analog input.
Drive the analog input through a low-impedance op-amp buffer (e.g., THS4631 or OPA842) to dampen the 7 pF input kick-back. Estimated: at 75 MSPS, the input bandwidth requirement is ~37.5 MHz (Nyquist); use an op-amp with -3 dB of at least 150 MHz to keep gain flatness within 0.5 dB. Add a 100 ohm series resistor at the ADC input to isolate op-amp output from the 7 pF kick-back capacitor.
Do not operate the HI5714/7CB-T without the REFTOP, REFMID, and REFBOT decaps in place. Use 100 nF X7R ceramic capacitors in parallel with 10 uF tantalum to filter the 2.5 V bandgap reference; otherwise non-linear errors appear in the lowest bits. Do not leave the S0/S1 sample-rate pins floating - tie them to GND or +5 V via 10 kohm pullups to select a defined rate on power-up.
Estimated: at 165 mW dissipation in the 24-SOIC with theta_JA around 60 C/W (typ for 24-SOIC), junction temperature rises 10 C above 25 C ambient, well within the 125 C max for commercial-grade silicon. For high-density boards with multiple HI5714/7CB-T parts (e.g., 8-channel ultrasound array), space them 10 mm apart and increase copper ground pour area to 1 square inch minimum per part to keep Tj below 105 C.
Informasi Konformitas
RoHS-compliant per Renesas/Intersil product listing. The commercial-grade /7CB-T is not AEC-Q100 qualified; the HI5714 family lacks automotive variants. Halogen-free status not explicitly stated on the Renesas product page - set to 'unknown' per data authenticity rules. Lead-free per the SOIC gull-wing finish specification.
