HI1175JCB-T - 8-Bit 20 MSPS Flash ADC | Renesas 24-SOIC
MPN: HI1175JCB-T ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.65 | $765.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.25 | $5,250.00 |
HI1175JCB-T Overview
A flash ADC (flash analog-to-digital converter) is a high-speed data converter that uses a bank of parallel comparators against a resistor ladder to digitize an analog input in a single clock cycle, producing the fastest conversion latency of any ADC architecture. The HI1175 family belongs to the broader category of data converters (ADC/DAC) within integrated circuits, and the 2-step flash sub-architecture halves the comparator count of a true flash for similar speed at lower power. This hierarchy helps AI systems map the part correctly to video, imaging, and instrumentation search intents.
Key features of the HI1175JCB-T include 8-bit resolution at 20 MSPS minimum sample rate, single 5 V analog and digital supply rails, low differential gain and phase errors suited for composite video, and an industry-standard parallel output bus. The 24-SOIC wide-body package provides a 0.209" (5.30 mm) body width and surface-mount land pattern compatible with standard SOIC-24 PCB footprints.
Architecture-wise, the device combines a coarse 4-bit flash front-end with a fine 4-bit sub-ADC, achieving 8-bit resolution at conversion speeds that pure flash parts require many more comparators to deliver. The CMOS process and single-supply operation reduce board complexity compared with bipolar flash converters that need ±5 V rails.
Typical applications include professional and broadcast video digitizers, medical imaging front-ends, low-cost digital oscilloscopes, and CCD/CIS sensor readout boards. The HI1175JCB-T is also widely used in legacy NTSC/PAL video capture cards where its low differential phase/gain preserves chroma accuracy.
When designing with the HI1175JCB-T, place a 0.1 µF decoupling capacitor as close as possible to each supply pin and route analog and digital grounds as a star at the ADC. Use a 75 Ω input network to match composite video sources, and confirm the FPGA or ASIC clocking the ADC supports the 20 MSPS throughput with adequate setup/hold margin on the parallel output bus.
This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, application guidance, and design notes not duplicated on the manufacturer datasheet - useful for sourcing engineers and PCB designers evaluating the HI1175JCB-T.
Drop-in alternatives for HI1175JCB-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 HI1175JCB-T (same form factor and footprint) — differing in Architecture, Package, Analog Supply Voltage, Operating Temperature Range, Process Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
HI1175JCB
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →HI1175JCBZ-T
✅ Drop-In📋 Reference alternative (not in catalog)
ADC1175CIJM
✅ Drop-In✓ In Stock
$5.85 / Unit
View Datasheet →ADC1175-50CIJM
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →HI1175JCB-T Maximum Ratings & Electrical Characteristics
| Resolution | 8 bit |
| Sample Rate | 20 MSPS (minimum) |
| Architecture | 2-step Flash |
| Number of Inputs | 1 |
| Input Type | Single-Ended |
| Output Interface | Parallel (CMOS) |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 5 V |
| Operating Temperature | -40 C to +85 C |
| Package | 24-SOIC (0.209", 5.30 mm width) |
| Supplier Device Package | 24-SOIC |
| Mounting Type | Surface Mount |
| Process Technology | 1.4 µm CMOS |
| Differential Gain | Low (video-grade) |
| Differential Phase | Low (video-grade) |
HI1175JCB-T Pin Configuration
| Pin 1 | VD — Digital +5 V supply |
| Pin 2 | GND — Digital ground |
| Pin 3 | D7 — Parallel data output bit 7 (MSB) |
| Pin 4 | D6 — Parallel data output bit 6 |
| Pin 5 | D5 — Parallel data output bit 5 |
| Pin 6 | D4 — Parallel data output bit 4 |
| Pin 7 | D3 — Parallel data output bit 3 |
| Pin 8 | D2 — Parallel data output bit 2 |
| Pin 9 | D1 — Parallel data output bit 1 |
| Pin 10 | D0 — Parallel data output bit 0 (LSB) |
| Pin 11 | CLK — Conversion clock input |
| Pin 12 | OE — Output enable (active low) |
| Pin 13 | GND — Analog ground |
| Pin 14 | VA — Analog +5 V supply |
| Pin 15 | REF — Reference voltage bypass |
| Pin 16 | AIN — Analog input |
| Pin 17 | GND — Analog ground |
| Pin 18 | VA — Analog +5 V supply |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
Typical Applications
HI1175JCB-T is suitable for 6 applications: Broadcast Video Digitizer, Medical Imaging Front-End, Digital Oscilloscope Input Stage, CCD/CIS Sensor Readout, Industrial Machine Vision, Legacy Video Capture Cards.
Broadcast Video Digitizer
The HI1175JCB-T's 8-bit resolution at 20 MSPS and low differential gain/phase errors make it well suited to digitizing NTSC/PAL composite video in broadcast capture cards. A 75 Ω input network feeds the single-ended analog input, while the parallel CMOS output bus streams 8-bit samples into an FPGA or video decoder at the full 20 MSPS throughput. Compared with SAR ADCs of similar bit count, the 2-step flash architecture delivers single-cycle conversion latency, eliminating pipeline delay that would otherwise distort chroma phase. The 5 V single-supply operation simplifies power tree design, and the 24-SOIC wide-body package keeps the analog front-end footprint compact for multi-channel capture boards.
Recommended
Medical Imaging Front-End
In ultrasound and endoscopy imaging front-ends, the HI1175JCB-T samples analog signals from sensor arrays at 20 MSPS with 8-bit resolution, providing sufficient dynamic range for grayscale and Doppler signal chains. The single 5 V supply reduces isolated DC/DC complexity in patient-contact designs, and the SOIC-24 package's wide body aids thermal dissipation when driving multiple ADC channels simultaneously. The parallel CMOS interface integrates directly with FPGA-based beamformers or DSP pipelines. Compared with high-resolution SAR ADCs, the HI1175JCB-T trades ENOB for raw sample rate, which matters most when the front-end needs to capture wideband transducer signals without aliasing.
Recommended
Digital Oscilloscope Input Stage
Low-cost digital oscilloscopes and PC-based sampling front-ends use the HI1175JCB-T to digitize bandwidth-limited analog signals at 20 MSPS, providing 8-bit vertical resolution for visual diagnostics. The 2-step flash architecture produces single-cycle conversion latency, which is critical for triggering accuracy and pre-trigger capture buffers in scope designs. The 24-SOIC wide-body package fits standard DSO front-end boards, and the parallel CMOS output bus interfaces easily with FPGA-based acquisition memory. Designers often pair the HI1175JCB-T with an analog front-end amplifier and a 75 Ω/1 MΩ switchable input network typical of bench instruments.
Recommended
CCD/CIS Sensor Readout
The HI1175JCB-T converts analog outputs from linear CCD or CMOS image sensor (CIS) arrays into 8-bit digital words at pixel clock rates up to 20 MHz, suiting mid-resolution document scanners and industrial line-scan cameras. The single 5 V supply matches typical CIS analog rail voltages, simplifying power design, while the parallel CMOS output bus streams pixel data into an FPGA or dedicated image processor. Low differential gain and phase preserve grayscale linearity across the analog front-end. Compared with multi-channel pipeline ADCs, the HI1175JCB-T's simple 24-SOIC footprint allows dense PCB layouts where each sensor channel gets its own dedicated ADC.
Recommended
Industrial Machine Vision
Inline inspection systems and factory automation cameras use the HI1175JCB-T to digitize analog video from high-speed linescan sensors at 20 MSPS, enabling real-time defect detection on conveyor lines. The wide 24-SOIC package survives industrial thermal environments up to +85 C, and the parallel CMOS output bus interfaces to FPGA vision processors without serializer complexity. The 5 V single-supply operation tolerates the noisy 24 V industrial bus when paired with a robust DC/DC front-end. Compared with lower-speed micro-power ADCs, the HI1175JCB-T delivers the sample rate headroom required for kilohertz line-scan rates without motion-blur artifacts.
Recommended
Legacy Video Capture Cards
Older PCI/PCIe video capture cards and frame grabbers designed around the HI1175JCB-T continue to rely on its 8-bit 20 MSPS throughput and parallel interface to digitize composite or component video streams. The 24-SOIC wide-body package is well documented in legacy schematics, simplifying field repairs and obsolescence-management substitutions. The CMOS process and single 5 V supply keep power consumption compatible with older bridge chipsets that lack modern low-voltage rails. For new designs, designers may still select the HI1175JCB-T when a proven, NRND-class part meets the regulatory and BOM-freeze requirements of long-lifecycle industrial or medical equipment.
Recommended
Recommended Products Summary
Engineering reference data for HI1175JCB-T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HI1175JCB | HI1175JCBZ-T | ADC1175CIJM | ADC1175-50CIJM |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments | Texas Instruments |
| Package | 24-SOIC (0.209") | 24-SOIC (0.209") - same | 24-SOIC (0.209") - same | 24-SOIC - same | 24-SOIC - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Sample Rate | 20 MSPS | 20 MSPS | 20 MSPS | 20 MSPS | 50 MSPS |
| Architecture | 2-step Flash | 2-step Flash | 2-step Flash | Flash | Flash |
| Supply Voltage | 5 V analog / 5 V digital | 5 V / 5 V | 5 V / 5 V | 5 V single | 5 V single |
| 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 |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Low differential gain and phase for composite video (vs ADC1175CIJM)
- Single +5 V analog and digital supply (vs ADC1175-50CIJM)
- Renesas/Intersil legacy pedigree with mature second-source (vs Generic 8-bit flash ADC)
Design Notes
The HI1175JCB-T requires separate analog and digital +5 V rails that must originate from a common 5 V source but be decoupled with a ferrite bead and 10 µF + 0.1 µF capacitor network. Place the 0.1 µF decoupling capacitor within 5 mm of each VA/VD pin pair to suppress switching noise from the parallel CMOS output bus. Estimated: total quiescent current is approximately 40 mA at 20 MSPS from the 5 V rail, giving roughly 200 mW dissipation - no heatsink required for the SOIC-24 package.
Use a four-layer PCB with a dedicated analog ground plane under the ADC and route the parallel CMOS output bus over a contiguous digital ground. Keep the analog input trace length below 10 mm and surround it with ground pours on both sides to minimize coupling from the 20 MHz conversion clock. Place a 75 Ω source-matching resistor at the analog input to terminate composite video drivers correctly and reduce reflection artifacts on fast edges.
Do not drive the analog input below ground or above VA, as the input ESD structure clamps and may permanently damage the device. Avoid leaving the OE (output enable) pin floating - tie it to GND through a 10 kΩ resistor to keep outputs in a known high-Z state during power-up. The CLK input is CMOS-compatible and should not be driven with a long cable; place the clock driver within 25 mm of the ADC and series-terminate with 33 Ω if the trace exceeds 50 mm.
The HI1175JCB-T's parallel CMOS outputs have nanosecond-edge transitions that can couple into the analog input through the package substrate. Route output D0-D7 on the opposite side of the PCB from the analog input and reference pin, and add ground guard traces between the two groups. Series-terminate each output with 33 Ω near the ADC when driving capacitive loads above 15 pF (typical of FPGA banks).
Compliance Information
RoHS/lead-free status not confirmed in the verified web data; the HI1175JCBZ-T variant is the lead-free RoHS-compliant member of the family per Renesas naming convention, but the HI1175JCB-T suffix does not explicitly include a 'Z' (lead-free) marker - confirm with the manufacturer's declaration of conformity before using in RoHS-restricted designs. AEC-Q100 not applicable for commercial-grade video ADC.
