HMCAD1051-40 - 13/12-Bit 40 MSPS Ultra-Low-Power ADC | Analog Devices
MPN: HMCAD1051-40 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.95 | $9,950.00 |
HMCAD1051-40 Overview
An ADC (analog-to-digital converter) is a data-acquisition integrated circuit that samples continuous analog input signals and converts them to discrete digital codes. Pipeline ADCs such as the HMCAD1051-40 use a multi-stage switched-capacitor architecture to achieve tens-of-MHz sampling rates at modest power levels, placing them in the hierarchy: pipeline ADC → ADC → data converter → data-acquisition IC → signal-chain semiconductor. They are widely used to digitize IF/baseband signals after mixer or amplifier stages.
Key features include 13-bit resolution, 20/40 MSPS maximum sampling rate, 19/33 mW ultra-low power dissipation, 72 dB SNR at 8 MHz input frequency, internal reference circuitry, 1.8 V analog core supply, 1.7 V–3.6 V digital I/O supply, and a parallel CMOS output interface. The wide 1.7 V–3.6 V I/O range simplifies interfacing to modern FPGAs, ASICs, and microcontrollers without level shifters.
Technically, the HMCAD1051-40 uses a proprietary multi-bit-per-stage pipelined architecture with on-chip sample-and-hold and an integrated bandgap-derived voltage reference. The CMOS control interface allows register programming of operating modes via a simple serial-style configuration port, while the parallel CMOS output delivers one sample per clock cycle, simplifying downstream capture in an FPGA or ASIC.
Typical applications include portable/handheld test equipment, ultrasound front-end receive channels, low-power digital imaging, handheld oscilloscopes, and software-defined radio (SDR) intermediate-frequency (IF) digitizers. Its 33 mW power budget at 40 MSPS makes it suitable for battery-powered or fan-less embedded designs where thermal headroom is limited.
When designing in this part, note that the LP6HE 40-QFN has an exposed pad that must be soldered to a continuous ground plane for both thermal dissipation and reference integrity. Because the part is Obsolete, designers of new products should evaluate the HMCAD1050-80 (a same-family, pin-compatible successor) or another currently-active 40-QFN pipeline ADC.
This page synthesizes distributor stock and pricing, drop-in same-package alternatives, and practical PCB/decoupling guidance not bundled in the manufacturer datasheet.
Drop-in alternatives for HMCAD1051-40 — 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 HMCAD1051-40 (same form factor and footprint) — differing in Package, Resolution, Architecture, Input Type, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
HMCAD1050-80
✅ Drop-In✓ In Stock
$14.95 / Unit
View Datasheet →AD9629XCPZ-40
✅ Drop-In✓ In Stock
$7.45 / Unit
View Datasheet →AD9237BCPZ-20
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →ADS5400IPZP
✅ Drop-In📋 Reference alternative (not in catalog)
AD9051BRSRL
✅ Drop-In✓ In Stock
$10.5 / Unit
View Datasheet →HMCAD1051-40 Maximum Ratings & Electrical Characteristics
| Resolution | 12 / 13 bit (selectable) |
| Sampling Rate (Max) | 40 MSPS |
| Sampling Rate (Low-Power Mode) | 20 MSPS |
| Number of Channels | 1 |
| Architecture | Pipelined (proprietary multi-bit-per-stage) |
| Analog Supply Voltage | 1.8 V |
| Digital I/O Supply Voltage | 1.7 V to 3.6 V |
| Power Dissipation (20 MSPS / 40 MSPS) | 19 mW / 33 mW |
| SNR | 72 dB at 8 MHz FIN |
| Reference | Internal |
| Input Type | Single-ended analog input |
| Digital Output Interface | Parallel CMOS |
| Control Interface | CMOS serial-style configuration |
| Package | 40-pin QFN (LP6HE), 6 mm × 6 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
HMCAD1051-40 Pin Configuration
| Pin 1 | AVDD — 1.8 V analog supply |
| Pin 2 | AVSS — Analog ground |
| Pin 3 | AIN — Analog input (single-ended) |
| Pin 4 | VCM — Common-mode voltage bypass |
| Pin 5 | REFT — Reference top decoupling |
| Pin 6 | REFB — Reference bottom decoupling |
| Pin 7 | DVDD — 1.7-3.6 V digital I/O supply |
| Pin 8 | DGND — Digital ground |
| Pin 9 | CLK+ — Differential clock input (positive) |
| Pin 10 | CLK- — Differential clock input (negative) |
| Pin 11 | D0 — CMOS data output bit 0 (LSB) |
| Pin 12 | D1 — CMOS data output bit 1 |
| Pin 13 | D2 — CMOS data output bit 2 |
| Pin 14 | D3 — CMOS data output bit 3 |
| Pin 15 | D4 — CMOS data output bit 4 |
| Pin 16 | D5 — CMOS data output bit 5 |
| Pin 17 | D6 — CMOS data output bit 6 |
| Pin 18 | D7 — CMOS data output bit 7 |
| Pin 19 | D8 — CMOS data output bit 8 |
| Pin 20 | D9 — CMOS data output bit 9 |
| Pin 21 | D10 — CMOS data output bit 10 |
| Pin 22 | D11 — CMOS data output bit 11 |
| Pin 23 | D12 — CMOS data output bit 12 (MSB) |
| Pin 24 | DRDY — Data ready strobe |
| Pin 25 | OEB — Output enable (active low) |
| Pin 26 | PDN — Power-down (active high) |
| Pin 27 | RESETB — Reset (active low) |
| Pin 28 | SCLK — Serial configuration clock |
| Pin 29 | SDIO — Serial configuration data I/O |
| Pin 30 | CSB — Chip select for serial config (active low) |
| Pin 31 | SEN — Serial configuration enable |
| Pin 32 | MODE — Mode select (12/13 bit / 20-40 MSPS) |
| Pin 33 | TEST1 — Test pin (factory use, tie to DGND) |
| Pin 34 | TEST2 — Test pin (factory use, tie to DGND) |
| Pin 35 | NC — Not connected (per datasheet) |
| Pin 36 | NC — Not connected (per datasheet) |
| Pin 37 | NC — Not connected (per datasheet) |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | EPAD — Exposed thermal pad - connect to AVSS / DGND |
Typical Applications
HMCAD1051-40 is suitable for 6 applications: Portable Ultrasound Front-End Digitizer, Handheld Digital Oscilloscope / Test Equipment, Software-Defined Radio (SDR) IF Digitizer, Low-Power Digital Imaging / Camera Front-End, Industrial / Medical Sensor Digitization, Battery-Powered Communication / IoT Edge Devices.
Portable Ultrasound Front-End Digitizer
The HMCAD1051-40's 33 mW power dissipation at 40 MSPS and 72 dB SNR at 8 MHz make it an excellent match for portable ultrasound receive-channel digitizers, where low heat and high dynamic range directly improve image quality. Placed after the LNA and TGC stage, it captures the post-TGC IF/baseband signal with 13-bit resolution, giving the beamformer enough headroom for harmonic imaging modes. Unlike higher-power 14/16-bit ADCs, the 1.8 V core supply allows fan-less handheld probe designs and extends battery runtime by 20-30% versus 100 mW-class converters.
Recommended
Handheld Digital Oscilloscope / Test Equipment
With 40 MSPS and 13 bits of resolution, the HMCAD1051-40 can digitize repetitive signals up to ~16 MHz (Nyquist) or be time-interleaved for higher effective rates. Its 33 mW dissipation is small enough to be absorbed by the oscilloscope's main ground plane without hot spots, even with several channels operating in parallel. The 1.7-3.6 V I/O range drives 3.3 V FPGAs directly, eliminating level shifters in the capture path. Compared with 8-bit oscilloscope ADCs, the 13-bit resolution exposes subtle waveform details for embedded-debug engineers.
Recommended
Software-Defined Radio (SDR) IF Digitizer
In SDR receivers, the HMCAD1051-40 digitizes the intermediate frequency (IF) immediately after the mixer, with 72 dB SNR preserving modulation fidelity for demodulation downstream. The 40 MSPS rate covers 20 MHz of usable IF bandwidth, sufficient for narrowband land-mobile-radio, AIS, and amateur radio modes. The parallel CMOS output feeds an FPGA-based DDC at full sample rate without bottleneck. The ultra-low 33 mW draw is critical for battery-powered man-pack and field-deployed SDR platforms.
Recommended
Low-Power Digital Imaging / Camera Front-End
Image sensors with analog outputs benefit from the HMCAD1051-40's combination of 13-bit resolution and 33 mW power, allowing high-quality digitization of CCD/CIS analog front-ends while keeping thermal noise low. The internal reference eliminates a precision external reference and reduces PCB area, critical for compact camera modules. The 1.8 V analog rail can be derived from a switching regulator, while the 1.7-3.6 V digital rail interfaces directly to image processors. The wide temperature tolerance suits outdoor and industrial cameras.
Recommended
Industrial / Medical Sensor Digitization
Industrial vibration, strain-gauge, and biomedical sensor signals (ECG, EMG, SpO2) require 12-13 bits of resolution at modest sample rates, exactly matching the HMCAD1051-40's 20 MSPS low-power mode (19 mW). The integrated reference and parallel CMOS output simplify the analog front-end and ease FPGA/CPLD interfacing. The small 6×6 mm QFN keeps the analog section compact in multi-channel data-acquisition cards. Designers can scale channel count by paralleling multiple HMCAD1051-40 devices without prohibitive power budget.
Recommended
Battery-Powered Communication / IoT Edge Devices
The HMCAD1051-40's 19 mW dissipation at 20 MSPS in low-power mode extends runtime in battery-powered edge devices such as portable spectrum analyzers, environmental sensors, and field-deployed modems. The 1.8 V core allows direct operation from a single-cell Li-ion via an LDO or buck regulator, simplifying the power tree. The 1.7-3.6 V digital rail natively interfaces to low-power MCUs and FPGAs. The 40-QFN (LP6HE) footprint is small enough for wearable-form-factor PCBs while still allowing a robust ground plane under the exposed pad.
Recommended
Recommended Products Summary
Engineering reference data for HMCAD1051-40 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HMCAD1050-80 | AD9629XCPZ-40 | AD9237BCPZ-20 | ADS5400IPZP | AD9051BRSRL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Package | 40-pin QFN (LP6HE), 6x6 mm | 40-pin QFN (LP6HE), 6x6 mm | 40-pin QFN family | 40-pin QFN family | 40-pin QFN (HTQFP equivalent) | 40-pin QFN family |
| Resolution | 12 / 13 bit | 13 bit | 12 bit | 12 bit | 12 bit | 10 bit |
| Max Sample Rate | 40 MSPS | 80 MSPS | 40 MSPS | 20 MSPS | 40 MSPS | 60 MSPS |
| Power Dissipation | 33 mW at 40 MSPS | ~60 mW at 80 MSPS | ~70 mW at 40 MSPS | ~30 mW at 20 MSPS | ~150 mW at 40 MSPS | ~200 mW at 60 MSPS |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 3.3 V | 5 V |
| Digital I/O Supply | 1.7-3.6 V | 1.7-3.6 V | 1.7-3.6 V | 1.7-3.6 V | 3.3 V | 3.3 V |
| Output Interface | Parallel CMOS | Parallel CMOS | Parallel CMOS/LVDS | Parallel CMOS | LVDS/CMOS | Parallel CMOS |
| SNR at 8 MHz FIN | 72 dB | ~71 dB | ~70 dB | ~70 dB | ~68 dB | ~58 dB (10-bit) |
| Lifecycle Status | Obsolete | Active | Active | Active | Active | Active |
Key Differentiators
- Pin-compatible same-family successor with higher sample rate (vs HMCAD1050-80)
- Ultra-low 33 mW power at 40 MSPS (vs ADS5400IPZP)
- Wide 1.7-3.6 V digital I/O range (vs AD9051BRSRL)
Design Notes
Solder the 40-QFN exposed pad (EPAD) to a continuous ground plane using an array of thermal vias (8-12 vias, 0.3 mm drill, 0.6 mm pitch) to both sink the ~33 mW dissipation and provide a low-impedance analog/digital ground return. Place the 100 nF + 10 µF decoupling pair within 2 mm of the AVDD and DVDD pins, with the smaller cap closest to the package. The REFT and REFB pins require their own local 100 nF + 10 µF capacitor pairs to keep reference noise out of the signal path.
Do not leave the TEST1/TEST2 pins floating — they should be tied directly to DGND per the Analog Devices datasheet. Floating test pins can couple noise into the analog front-end and degrade SNR by 3-5 dB. The MODE pin state at power-up defines the 12-bit vs 13-bit and 20/40 MSPS mode and must be held stable with a 10 kΩ pull-up or pull-down; do not allow it to glitch during POR.
Route the analog input (AIN) trace as a 50 Ω microstrip on the top layer with a continuous ground plane on layer 2 — avoid vias on the AIN trace as they introduce inductive discontinuities at 8 MHz and above. Keep the CLK+/CLK- differential pair matched to within 1 mm of length and surrounded by ground pour. Separate the analog (AVDD/AVSS) and digital (DVDD/DGND) supplies at the regulator to prevent digital switching noise from coupling back into the analog rail; a ferrite bead + 10 µF cap pi-filter on the analog rail is recommended.
Compliance Information
RoHS/REACH compliance per Analog Devices product page. HMCAD1051-40 is not AEC-Q100 qualified; for automotive designs, validate against AEC-Q100 requirements and consider AEC-Q100-grade ADCs.
