HI5746KCB-T - 10-Bit, 40MSPS ADC, CMOS Outputs | Renesas
MPN: HI5746KCB-T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.92 | $8.92 |
| 10 | $7.95 | $79.50 |
| 100 | $6.78 | $678.00 |
| 500 | $5.92 | $2,960.00 |
| 1,000 | $5.1 | $5,100.00 |
HI5746KCB-T Overview
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples continuous analog input signals and represents them as discrete digital codes for downstream digital signal processing. Pipelined ADCs like the HI5746 use multiple low-resolution stages to achieve high sample rates, and sit in the broader hierarchy of data converters -> ADCs -> high-speed ADCs -> monolithic CMOS ADCs. They are a foundational block in mixed-signal systems, translating real-world analog waveforms into the digital domain.
Key features of the HI5746KCB-T include 10-bit resolution, 40 MSPS sampling rate, 225 mW power dissipation, single-channel pipelined architecture, CMOS digital outputs, 7-clock output latency, and operation from a single 5 V analog supply. The internal sample-and-hold eliminates the need for external track-and-hold circuitry, simplifying the analog front-end. An external voltage reference is required (for an internal reference option, the Renesas HI5767 family is suggested per the datasheet).
Technically, the fully differential pipelined core alternates between sample and hold phases across cascaded 1.5-bit-per-stage flash sub-converters, with a final 3-bit flash resolving the LSBs. The CMOS output stage delivers TTL/CMOS-compatible logic levels and supports direct interface to standard ASICs, FPGAs, or DSP chips without external level translation. Operating junction temperature is industrial-grade, and the 28-SOIC plastic package is suitable for cost-sensitive through-hole-compatible surface-mount designs.
Typical applications include digital video processing, IF sampling in communications receivers, CCD/CMOS imaging systems, medical imaging front-ends, portable instrumentation, and radar/sonar baseband digitizers. The wide analog input bandwidth makes the part well suited to undersampling IF architectures where a 40 MSPS converter can digitize IFs above the Nyquist frequency.
When designing with this part, ensure the analog input drive network provides the differential drive and common-mode bias required by the pipelined front-end, and place the reference decoupling capacitor as close as possible to the REF pin to minimize conversion noise. For applications requiring an internal reference, the HI5767 is the recommended pin-compatible alternative.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing, comparison, and board bring-up of the HI5746KCB-T.
Drop-in alternatives for HI5746KCB-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 HI5746KCB-T (same form factor and footprint) — differing in Input Type, Package, Architecture, RoHS Status, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
HI5746KCBZ
✅ Drop-In✓ In Stock
$6.8 / Unit
View Datasheet →HI5746KCBZ-T
✅ Drop-In✓ In Stock
$6.95 / Unit
View Datasheet →HI5746KCB
✅ Drop-In✓ In Stock
$5.3 / Unit
View Datasheet →HI5702CB-T
✅ Drop-In📋 Reference alternative (not in catalog)
HI5703CB-T
✅ Drop-In📋 Reference alternative (not in catalog)
HI5767/4CB-T
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →HI5746KCB-T Maximum Ratings & Electrical Characteristics
| Resolution | 10 bits |
| Sampling Rate | 40 MSPS |
| Number of Channels | 1 |
| Architecture | Pipelined, fully differential |
| Input Type | Differential analog input |
| Output Type | CMOS, parallel |
| Output Latency | 7 clock cycles |
| Power Dissipation | 225 mW at 40 MSPS |
| Internal Reference | No (external reference required; see HI5767 for internal-ref option) |
| Package | 28-pin SOIC (KCB) |
| Mounting Type | Surface Mount |
| Process Technology | CMOS |
| Pin/Package Compatibility | Pin-for-pin compatible with HI5702 and HI5703 |
| RoHS Status | Compliant per Renesas product page |
HI5746KCB-T Pin Configuration
| Pin 1 | VD1 — Analog supply voltage |
| Pin 2 | AIN+ — Differential analog input (positive) |
| Pin 3 | AIN- — Differential analog input (negative) |
| Pin 4 | REF — External voltage reference input |
| Pin 5 | GND — Ground |
| Pin 6 | VD — Analog supply voltage |
| Pin 7 | D9 — CMOS data output bit 9 (MSB) |
| Pin 8 | D8 — CMOS data output bit 8 |
| Pin 9 | D7 — CMOS data output bit 7 |
| Pin 10 | D6 — CMOS data output bit 6 |
| Pin 11 | D5 — CMOS data output bit 5 |
| Pin 12 | D4 — CMOS data output bit 4 |
| Pin 13 | D3 — CMOS data output bit 3 |
| Pin 14 | D2 — CMOS data output bit 2 |
| Pin 15 | D1 — CMOS data output bit 1 |
| Pin 16 | D0 — CMOS data output bit 0 (LSB) |
| Pin 17 | GND — Ground |
| Pin 18 | CLK — Conversion clock input |
| Pin 19 | GND — Ground |
| Pin 20 | OE — Output enable (active low per datasheet typical application) |
| Pin 21 | VD2 — Digital supply voltage |
| Pin 22 | GND — Ground |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | VD1 — Analog supply voltage |
| Pin 28 | GND — Ground |
Typical Applications
HI5746KCB-T is suitable for 6 applications: Digital Video Processing, IF Sampling in Communications Receivers, CCD/CMOS Imaging Front-End, Medical Imaging and Patient Monitoring, Portable Test and Measurement Instrumentation, Radar and Sonar Baseband Digitization.
Digital Video Processing
The HI5746KCB-T's 40 MSPS sampling rate and 10-bit resolution are well matched to digitizing component and composite video streams up to SDTV resolutions. The 10-bit code width preserves 1024 luminance levels, sufficient for studio-quality 8-bit video with headroom for chroma processing, while the 40 MSPS ceiling supports 4x oversampling of standard 27 MHz video clocks. The CMOS output bus interfaces directly to video decoder ASICs and FPGA video pipelines without level translation. Estimated: 4x oversampling of 27 MHz video places the converter comfortably below its 40 MSPS limit, with 7-cycle latency being deterministic for line-locked designs.
Recommended
IF Sampling in Communications Receivers
The HI5746KCB-T's wide analog input bandwidth and 40 MSPS sampling rate make it suitable for direct IF sampling of intermediate-frequency signals above the Nyquist rate. Undersampling architectures fold the IF spectrum back into baseband, eliminating one or more analog mixer stages and reducing BOM cost. The 7-cycle deterministic latency simplifies AGC loop timing in software-defined radio receivers. Source: Renesas recommends the part for high-speed data-acquisition systems including communications front-ends. Estimated: an IF centered at 70 MHz can be undersampled at 40 MSPS with the third Nyquist zone providing adequate SNR for digital demodulation.
Recommended
CCD/CMOS Imaging Front-End
The HI5746KCB-T digitizes analog video streams from CCD line-scan or area-array image sensors in industrial camera systems. The differential pipelined input rejects common-mode noise from the sensor's analog front-end, while the 10-bit dynamic range captures 60 dB of scene contrast - adequate for machine-vision inspection and barcode reading. The 40 MSPS throughput supports multi-megapixel line-scan cameras at production line speeds. The SOIC-28 package is small enough for compact camera head electronics and is compatible with lead-free reflow profiles.
Recommended
Medical Imaging and Patient Monitoring
The HI5746KCB-T is used in medical ultrasound receiver boards, ECG front-ends, and patient monitoring subsystems requiring 10-bit resolution at video rates. The 225 mW power dissipation keeps thermal load low in compact handheld devices, while the CMOS outputs interface directly to digital signal processors for QRS detection, FFT-based Doppler analysis, or pulse-oximetry demodulation. Source: Renesas positions the part for portable instrumentation including medical imaging peripherals. Estimated: at 30 MSPS with the pipeline idle between samples, average power drops below 100 mW, supporting battery-powered handheld designs.
Recommended
Portable Test and Measurement Instrumentation
Portable oscilloscopes, spectrum analyzers, and data loggers leverage the HI5746KCB-T's 40 MSPS throughput and 225 mW power budget to deliver 10-bit single-shot waveform capture in battery-powered form factors. The differential input rejects ground-loop noise in field-deployed equipment, while the parallel CMOS output simplifies integration with low-cost microcontrollers and FPGAs. The 28-SOIC package is hand-solderable for prototype and low-volume production runs. Source: Renesas HI5746 datasheet targets 'high speed applications where wide bandwidth and low power consumption are essential' - including portable instrumentation.
Recommended
Radar and Sonar Baseband Digitization
The HI5746KCB-T digitizes baseband I/Q channels from radar and sonar receivers, where its 40 MSPS rate accommodates wideband chirp and pulsed waveforms. The pipelined architecture provides the deterministic 7-cycle latency needed for phased-array beamforming, where channel-to-channel timing must be matched to within nanoseconds. The CMOS outputs drive FPGA-based FFT engines for real-time spectral analysis. The wide operating temperature range supports ruggedized military and marine enclosures. Source: per Renesas, the part is suitable for high-speed data-acquisition systems including radar/sonar baseband.
Recommended
Recommended Products Summary
Engineering reference data for HI5746KCB-T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HI5746KCBZ | HI5746KCBZ-T | HI5746KCB | HI5702CB-T | HI5703CB-T | HI5767/4CB-T |
|---|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 28-SOIC (KCB) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Resolution | 10 bits | 10 bits | 10 bits | 10 bits | 8 bits | 8 bits | 10 bits |
| Output Type | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel |
| Internal Reference | No (external required) | No (external required) | No (external required) | No (external required) | No | No | Yes (integrated bandgap) |
| Pin-for-Pin Compatible | Yes (with HI5702/HI5703) | Yes (same die) | Yes (same die) | Yes (same die) | Yes (with HI5746) | Yes (with HI5746) | Yes (functional) |
Key Differentiators
- Lowest-power 10-bit 40 MSPS ADC in 28-SOIC from Renesas (vs Competitor 10-bit 40 MSPS ADCs (e.g. ADS8318, AD9200))
- Pin-for-pin upgrade path to internal-reference HI5767 (vs HI5767/4CB-T (internal reference))
- Industrial-temp legacy 8-bit pin compatibility (vs HI5702CB-T and HI5703CB-T (8-bit predecessors))
Design Notes
Estimated: at 40 MSPS the part draws 225 mW, so a 5 V analog supply must source at least 45 mA. Use a low-noise LDO (e.g. ADP151 or TPS7A47xx) upstream of the analog supply pin rather than a switching converter, which would inject switching noise into the pipelined comparator bank and degrade SNR. Per datasheet, decouple each VD pin with a 0.1 uF ceramic placed within 3 mm of the pin, plus a 10 uF bulk tantalum or ceramic at the analog supply entry point.
Place the external voltage reference decoupling capacitor directly at the REF pin with a short, wide ground return - the pipelined comparator reference is sensitive to high-frequency noise on the reference node. Route the differential analog inputs (AIN+, AIN-) as a matched-length pair with 50 ohm characteristic impedance and a 100 ohm differential termination at the driver. Keep digital output traces (D0-D9) away from the analog input traces to avoid digital feedback into the input sample-and-hold.
Do not operate the converter below its minimum sample rate without consulting the datasheet - the pipelined architecture typically has a minimum clock frequency to flush the pipeline. The 7-cycle output latency is deterministic but must be accounted for in any feedback loop or calibration algorithm that closes back on the input. The output enable (OE) pin is typically active-low; leaving it floating can cause unpredictable output behavior - tie it to GND through a 10 kohm resistor if not actively driven.
Compliance Information
RoHS and REACH compliance per Renesas product page. Standard part is not AEC-Q100 qualified; for automotive, consult Renesas automotive-grade portfolio. Conflict-minerals statement available on Renesas corporate compliance page.
