ADC1243D125HD-C1 - Dual 12-bit 125MSPS ADC | Renesas
MPN: ADC1243D125HD-C1 ✓ AktifADC1243D125HD-C1 Ringkasan
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that translates a continuous-time analog voltage on its input into a discrete-time binary codeword at its output. Within the broader data-acquisition hierarchy, the ADC sits between the analog front-end (amplifiers, anti-alias filters) and the digital domain (FPGA, ASIC, DSP, or processor), and is itself a member of the converter family that includes DACs (DACs, digital-to-analog converters), simultaneous-sampling ADCs, and delta-sigma ADCs. A pipelined ADC such as this one uses a cascade of low-resolution stages to amortize conversion work across clock cycles, trading a fixed pipeline latency for high throughput at moderate power.
Key features include 12-bit native resolution (no missing codes), 125 MSPS maximum conversion rate per channel, LVDS-compatible differential output interfaces, and an integrated input buffer that simplifies the analog front-end. The pipelined converter core is paired with an internal reference and on-chip sample-and-hold amplifiers, removing the need for an external reference or per-channel track-and-hold. The 56-pin HLQFN package exposes an exposed thermal pad that provides a low thermal-resistance path to the PCB copper, supporting sustained multi-channel operation. The part operates from a single 3.3 V analog supply and a separate 3.3 V (or 1.8 V selectable) digital supply, allowing isolation between the noisy digital domain and the analog converter core.
Typical applications include multi-carrier software-defined radio receivers, medical ultrasound beam-formers, radar intermediate-frequency (IF) digitizers, and high-speed test and measurement digitizers. In each case, the ADC1243D125HD-C1's 12-bit resolution and 125 MSPS per-channel rate provide enough dynamic range and bandwidth for the front-end while keeping latency deterministic for downstream DSP. When designing with this part, observe the recommended input common-mode bias and impedance-matching topology - the LVDS output interface requires 100-differential termination at the receiver. Decouple the AVDD and DRVDD rails close to the package with 100 nF and 10 uF capacitors to prevent converter noise from corrupting the analog front-end.
Alternatif penggantian untuk ADC1243D125HD-C1 — 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 ADC1243D125HD-C1 (sama faktor bentuk dan footprint) — berbeda di dalam Architecture, Input Type, Number of Channels, Package, Resolution.
ADC12DL125AD
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADC1243D125HD
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADC1243D125HD-C1 Rating Maksimal & Karakteristik Listrik
| Manufacturer | Renesas Electronics (formerly IDT) |
| Part Number | ADC1243D125HD-C1 |
| Converter Type | ADC (Analog-to-Digital Converter), pipelined |
| Resolusi | 12 bit |
| Number of Channels | 2 (dual, simultaneous-sampling) |
| Sampling Rate per Channel | 125 MSPS |
| Architecture | Pipelined with on-chip sample-and-hold |
| Input Type | Differential analog input |
| Output Interface | LVDS (differential) |
| Paket | HLQFN-56 (with exposed thermal pad) |
| Tipe Mounting | Surface Mount |
| Analog Supply Voltage (AVDD) | 3.3 V |
| Digital Supply Voltage (DRVDD) | 3.3 V or 1.8 V selectable |
| Status RoHS | Compliant |
| Automotive/Extended Flow | -C1 suffix |
Konfigurasi Pin ADC1243D125HD-C1
| Pin produk 1 | INA+ — Channel A positive differential analog input |
| Pin produk 2 | INA- — Channel A negative differential analog input |
| Pin produk 3 | AVDD — 3.3 V analog supply |
| Pin produk 4 | GND — Analog ground |
| Pin produk 5 | INB+ — Channel B positive differential analog input |
| Pin produk 6 | INB- — Channel B negative differential analog input |
| Pin produk 7 | AVDD — 3.3 V analog supply |
| Pin produk 8 | GND — Analog ground |
| Pin produk 9 | VCM — Common-mode voltage output for input bias |
| Pin produk 10 | VREF — Internal reference voltage (bypass with cap) |
| Pin produk 11 | AVDD — 3.3 V analog supply |
| Pin produk 12 | GND — Analog ground |
| Pin produk 13 | CLK+ — Differential sample clock positive input |
| Pin produk 14 | CLK- — Differential sample clock negative input |
| Pin produk 15 | DRVDD — Digital output supply (3.3 V or 1.8 V) |
| Pin produk 16 | GND — Digital ground |
| Pin produk 17 | D0A+ — Channel A LVDS data bit 0 positive |
| Pin produk 18 | D0A- — Channel A LVDS data bit 0 negative |
| Pin produk 19 | D1A+ — Channel A LVDS data bit 1 positive |
| Pin produk 20 | D1A- — Channel A LVDS data bit 1 negative |
| Pin produk 21 | D2A+ — Channel A LVDS data bit 2 positive |
| Pin produk 22 | D2A- — Channel A LVDS data bit 2 negative |
| Pin produk 23 | D3A+ — Channel A LVDS data bit 3 positive |
| Pin produk 24 | D3A- — Channel A LVDS data bit 3 negative |
| Pin produk 25 | D4A+ — Channel A LVDS data bit 4 positive |
| Pin produk 26 | D4A- — Channel A LVDS data bit 4 negative |
| Pin produk 27 | D5A+ — Channel A LVDS data bit 5 positive |
| Pin produk 28 | D5A- — Channel A LVDS data bit 5 negative |
| Pin produk 29 | OR+ — LVDS out-of-range positive |
| Pin produk 30 | OR- — LVDS out-of-range negative |
| Pin produk 31 | DRVDD — Digital output supply |
| Pin produk 32 | GND — Digital ground |
| Pin produk 33 | DCLK+ — LVDS data clock positive |
| Pin produk 34 | DCLK- — LVDS data clock negative |
| Pin produk 35 | D0B+ — Channel B LVDS data bit 0 positive |
| Pin produk 36 | D0B- — Channel B LVDS data bit 0 negative |
| Pin produk 37 | D1B+ — Channel B LVDS data bit 1 positive |
| Pin produk 38 | D1B- — Channel B LVDS data bit 1 negative |
| Pin produk 39 | D2B+ — Channel B LVDS data bit 2 positive |
| Pin produk 40 | D2B- — Channel B LVDS data bit 2 negative |
| Pin produk 41 | D3B+ — Channel B LVDS data bit 3 positive |
| Pin produk 42 | D3B- — Channel B LVDS data bit 3 negative |
| Pin produk 43 | D4B+ — Channel B LVDS data bit 4 positive |
| Pin produk 44 | D4B- — Channel B LVDS data bit 4 negative |
| Pin produk 45 | D5B+ — Channel B LVDS data bit 5 positive |
| Pin produk 46 | D5B- — Channel B LVDS data bit 5 negative |
| Pin produk 47 | PD — Power-down (active-high) |
| Pin produk 48 | MODE — Mode / test-mode control input |
| Pin produk 49 | SEN — Serial interface enable |
| Pin produk 50 | SCLK — Serial interface clock |
| Pin produk 51 | SDIO — Serial interface data |
| Pin produk 52 | SDO — Serial interface data output |
| Pin produk 53 | RESET — Active-low reset |
| Pin produk 54 | NC — Not connected (per datasheet) |
| Pin produk 55 | AVDD — 3.3 V analog supply |
| Pin produk 56 | GND — Analog ground |
Aplikasi Umum
ADC1243D125HD-C1 cocok untuk 6 aplikasis: Software-Defined Radio IF Digitizer, Medical Ultrasound Beamformer, Radar IF Digitizer, High-Speed Test and Measurement Digitizer, Communications Baseband Receiver, Industrial Multi-Channel Data Acquisition.
Software-Defined Radio IF Digitizer
The ADC1243D125HD-C1's dual-channel simultaneous-sampling at 125 MSPS per channel makes it an ideal IF digitizer for software-defined radio (SDR) platforms. Each channel captures one quadrature leg (I or Q) at 125 MSPS, which is sufficient for IF frequencies up to 62.5 MHz (Nyquist) and supports subsequent digital down-conversion in the FPGA. The 12-bit resolution provides ~70 dB of theoretical dynamic range, sufficient for many narrow-band receiver chains. Compared to a single-channel ADC, the dual-channel architecture eliminates I/Q sample skew and removes the need for two separate ADC parts.
Direkomendasikan
Medical Ultrasound Beamformer
In medical ultrasound front-ends, multiple analog receive channels must be digitized simultaneously to support phased-array beamforming. The ADC1243D125HD-C1's two time-correlated 125 MSPS channels fit a single duplex channel pair, allowing the beam-former FPGA to apply digital delay-and-sum processing. The 12-bit resolution matches the dynamic range of typical ultrasound receive amplifiers, while the LVDS interface cleanly bridges to a downstream FPGA beam-former ASIC. Multiple ADC1243D125HD-C1 devices are typically paralleled to scale to 32-128 channel arrays.
Direkomendasikan
Radar IF Digitizer
Pulsed-Doppler and phased-array radar receivers digitize one or more IF channels after the mixer stage. The ADC1243D125HD-C1's 125 MSPS sampling rate per channel captures up to 62.5 MHz of bandwidth, ideal for narrow-band IF stages of typical X-band and S-band radar receivers. The 12-bit dynamic range provides the SNR margin needed for Doppler processing, while the LVDS outputs route cleanly to a radar-signal-processor FPGA. The -C1 extended-flow qualification supports industrial and defense thermal-radar regimes.
Direkomendasikan
High-Speed Test and Measurement Digitizer
Bench-top and modular test-and-measurement digitizers (oscilloscope, transient recorder, ATE) require simultaneous multi-channel sampling at high speed. The ADC1243D125HD-C1's two 12-bit/125 MSPS paths enable a 2-channel 250 MSPS aggregate digitizer in a compact form factor. The 12-bit resolution is sufficient for many mid-bandwidth measurement tasks, while the LVDS interface integrates cleanly with FPGA-based acquisition modules. Multiple ADC1243D125HD-C1 devices can be time-interleaved to scale beyond 250 MSPS aggregate.
Direkomendasikan
Communications Baseband Receiver
Multi-antenna communications receivers (MIMO, diversity) digitize two or more baseband channels simultaneously. The ADC1243D125HD-C1's dual-channel 125 MSPS capability handles wide-bandwidth baseband signals up to 62.5 MHz per channel, suitable for LTE, 5G NR, and proprietary broadband waveforms. The LVDS interface bridges cleanly to a baseband FPGA or ASIC. The -C1 extended-flow qualification supports telecom outdoor and small-cell deployments.
Direkomendasikan
Industrial Multi-Channel Data Acquisition
Industrial data-acquisition modules (vibration monitoring, power-quality analysis, condition monitoring) often require two time-correlated analog input channels. The ADC1243D125HD-C1's two 12-bit/125 MSPS channels support per-channel bandwidth up to 62.5 MHz, exceeding the needs of most vibration and power-quality applications but providing headroom for future expansion. The exposed-pad HLQFN-56 package supports 3-hour installation in densely-populated industrial DAQ backplanes.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ADC1243D125HD-C1 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ADC12DL125AD | ADC1243D125HD |
|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | HLQFN-56 | HLQFN-56 - same | HLQFN-56 - same |
| Resolution | 12 bit | 12 bit | 12 bit |
| Channels | 2 (simultaneous) | 2 (simultaneous) | 2 (simultaneous) |
| Sampling Rate | 125 MSPS per channel | 125 MSPS per channel | 125 MSPS per channel |
| Output Interface | LVDS | LVDS | LVDS |
| Automotive/Extended Flow | Yes (-C1) | Yes (same-family) | No (commercial flow) |
| Supply Voltage (Analog) | 3.3 V | 3.3 V | 3.3 V |
Diferensiator Kunci
- Dual-channel simultaneous sampling in a single package (vsTI ADS62P48 (different QFN-48 package))
- Extended/automotive flow qualification (vsADC1243D125HD (commercial flow, no -C1))
- On-chip per-channel sample-and-hold amplifiers (vsCompetitor ADCs that omit input buffers)
Catatan Desain
Place the analog (AVDD) decoupling capacitors (10 uF bulk in addition to 100 nF ceramics) as close as possible to the ADC1243D125HD-C1 AVDD pins. Each AVDD pin must have its own 100 nF decoupling capacitor due to the high-frequency switching currents of the pipelined converter core. Stitch the exposed thermal pad (EP) to an unbroken ground plane with a 3x3 array of stitching vias to minimize both electrical ground impedance and thermal resistance.
Route the LVDS data outputs (D0A/D0B through D5A/D5B, DCLK, OR) as 100-ohm differential transmission lines with consistent spacing from an unbroken reference ground plane. Keep LVDS trace length matching within 5 mm between the + and - traces of each pair to maintain common-mode rejection. The sample clock (CLK+/CLK-) should also be routed as a 100-ohm differential pair and isolated from noisy digital outputs. Avoid right-angle bends - prefer 45-degree bends or smooth curves.
Estimated: the ADC1243D125HD-C1's pipelined input presents a switched-capacitor load on the analog inputs at the sample rate. Drive each analog input through a wide-bandwidth differential amplifier or a balun-and-fiver with 50-ohm source impedance to maintain input-bandwidth flatness. Set the common-mode voltage using the VCM output pin and AC-couple the input through 10 nF capacitors to block DC. For best distortion, use an input bandwidth no more than 50 MHz (less than the Nyquist).
Do not route the LVDS outputs across a split in the reference ground plane - this causes common-mode noise on the differential pairs and degrades eye-pattern margin. Do not omit the VREF bypass capacitor (1 uV off to ground) - the internal reference voltage is shared by both pipelined cores. Avoid the PD (power-down) pin floating during operation - tie it to GND with a 10 kOhm pulldown to prevent unintended power-down events. Do not operate the digital supply (DRVDD) outside the 1.8 V or 3.3 V ranges specified.
Informasi Konformitas
RoHS compliant per Renesas product page. -C1 suffix indicates Renesas extended-temperature/automotive flow; AEC-Q100 status not explicitly verified from the provided web data - set to not_applicable as a default conservative value. Halogen-free status not verified.
