HI5714/7CB-T - 8-Bit 75MSPS ADC | Renesas | SOIC-24
MPN: HI5714/7CB-T ✓ Hoạt độngHI5714/7CB-T Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho HI5714/7CB-T — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với HI5714/7CB-T (cùng hình factor và footprint) — khác nhau ở Package, Architecture, Sampling Rate, Input Type, Analog Supply Voltage.
HI5714/4CB-T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
HI5714/7CB
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
HI5714/7CB-T Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 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) |
| Điện áp cung cấp | +5 V (analog and digital) |
| Input Range | 2 Vpp (typ) |
| Cung cấp电容 | ~7 pF |
| Internal Reference | 2.5 V on-chip bandgap |
| Output Interface | Parallel binary, TTL-compatible |
| Power Consumption (75 MSPS) | 165 mW (typ) |
| Nhiệt độ hoạt động | -40 C to +85 C (commercial grade) |
| Process Technology | HBC10 BiCMOS |
| Hộp | 24-SOIC (gull-wing, 300 mil) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân HI5714/7CB-T
| Chân 1 | VCC — +5 V analog supply |
| Chân 2 | GND — Analog ground |
| Chân 3 | AIN — Analog input |
| Chân 4 | REFTOP — Reference top (decap) |
| Chân 5 | REFMID — Reference mid (decap) |
| Chân 6 | REFBOT — Reference bottom (decap) |
| Chân 7 | VCC — +5 V supply |
| Chân 8 | GND — Digital ground |
| Chân 9 | D7 — Output bit 7 (MSB) |
| Chân 10 | D6 — Output bit 6 |
| Chân 11 | D5 — Output bit 5 |
| Chân 12 | D4 — Output bit 4 |
| Chân 13 | D3 — Output bit 3 |
| Chân 14 | D2 — Output bit 2 |
| Chân 15 | D1 — Output bit 1 |
| Chân 16 | D0 — Output bit 0 (LSB) |
| Chân 17 | GND — Digital ground |
| Chân 18 | CLK — Sample clock input |
| Chân 19 | VCC — +5 V supply |
| Chân 20 | GND — Analog ground |
| Chân 21 | REFADJ — Reference adjust |
| Chân 22 | VREF — 2.5 V internal reference |
| Chân 23 | S1 — Sample-rate select 1 |
| Chân 24 | S0 — Sample-rate select 0 |
Ứng dụng tiêu biểu
HI5714/7CB-T phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho HI5714/7CB-T — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- 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)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
