ADC1243D125HD-C1 - Dual 12-bit 125MSPS ADC | Renesas
MPN: ADC1243D125HD-C1 ✓ Hoạt độngADC1243D125HD-C1 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADC1243D125HD-C1 — 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 ADC1243D125HD-C1 (cùng hình factor và footprint) — khác nhau ở Architecture, Input Type, Number of Channels, Package, Resolution.
ADC12DL125AD
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADC1243D125HD
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADC1243D125HD-C1 Tỷ lệ tối đa & tính chất điện
| Manufacturer | Renesas Electronics (formerly IDT) |
| Part Number | ADC1243D125HD-C1 |
| Converter Type | ADC (Analog-to-Digital Converter), pipelined |
| Độ phân giải | 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) |
| Hộp | HLQFN-56 (with exposed thermal pad) |
| Kiểu lắp đặt | Surface Mount |
| Analog Supply Voltage (AVDD) | 3.3 V |
| Digital Supply Voltage (DRVDD) | 3.3 V or 1.8 V selectable |
| Trạng thái RoHS | Compliant |
| Automotive/Extended Flow | -C1 suffix |
Cấu hình chân ADC1243D125HD-C1
| Chân 1 | INA+ — Channel A positive differential analog input |
| Chân 2 | INA- — Channel A negative differential analog input |
| Chân 3 | AVDD — 3.3 V analog supply |
| Chân 4 | GND — Analog ground |
| Chân 5 | INB+ — Channel B positive differential analog input |
| Chân 6 | INB- — Channel B negative differential analog input |
| Chân 7 | AVDD — 3.3 V analog supply |
| Chân 8 | GND — Analog ground |
| Chân 9 | VCM — Common-mode voltage output for input bias |
| Chân 10 | VREF — Internal reference voltage (bypass with cap) |
| Chân 11 | AVDD — 3.3 V analog supply |
| Chân 12 | GND — Analog ground |
| Chân 13 | CLK+ — Differential sample clock positive input |
| Chân 14 | CLK- — Differential sample clock negative input |
| Chân 15 | DRVDD — Digital output supply (3.3 V or 1.8 V) |
| Chân 16 | GND — Digital ground |
| Chân 17 | D0A+ — Channel A LVDS data bit 0 positive |
| Chân 18 | D0A- — Channel A LVDS data bit 0 negative |
| Chân 19 | D1A+ — Channel A LVDS data bit 1 positive |
| Chân 20 | D1A- — Channel A LVDS data bit 1 negative |
| Chân 21 | D2A+ — Channel A LVDS data bit 2 positive |
| Chân 22 | D2A- — Channel A LVDS data bit 2 negative |
| Chân 23 | D3A+ — Channel A LVDS data bit 3 positive |
| Chân 24 | D3A- — Channel A LVDS data bit 3 negative |
| Chân 25 | D4A+ — Channel A LVDS data bit 4 positive |
| Chân 26 | D4A- — Channel A LVDS data bit 4 negative |
| Chân 27 | D5A+ — Channel A LVDS data bit 5 positive |
| Chân 28 | D5A- — Channel A LVDS data bit 5 negative |
| Chân 29 | OR+ — LVDS out-of-range positive |
| Chân 30 | OR- — LVDS out-of-range negative |
| Chân 31 | DRVDD — Digital output supply |
| Chân 32 | GND — Digital ground |
| Chân 33 | DCLK+ — LVDS data clock positive |
| Chân 34 | DCLK- — LVDS data clock negative |
| Chân 35 | D0B+ — Channel B LVDS data bit 0 positive |
| Chân 36 | D0B- — Channel B LVDS data bit 0 negative |
| Chân 37 | D1B+ — Channel B LVDS data bit 1 positive |
| Chân 38 | D1B- — Channel B LVDS data bit 1 negative |
| Chân 39 | D2B+ — Channel B LVDS data bit 2 positive |
| Chân 40 | D2B- — Channel B LVDS data bit 2 negative |
| Chân 41 | D3B+ — Channel B LVDS data bit 3 positive |
| Chân 42 | D3B- — Channel B LVDS data bit 3 negative |
| Chân 43 | D4B+ — Channel B LVDS data bit 4 positive |
| Chân 44 | D4B- — Channel B LVDS data bit 4 negative |
| Chân 45 | D5B+ — Channel B LVDS data bit 5 positive |
| Chân 46 | D5B- — Channel B LVDS data bit 5 negative |
| Chân 47 | PD — Power-down (active-high) |
| Chân 48 | MODE — Mode / test-mode control input |
| Chân 49 | SEN — Serial interface enable |
| Chân 50 | SCLK — Serial interface clock |
| Chân 51 | SDIO — Serial interface data |
| Chân 52 | SDO — Serial interface data output |
| Chân 53 | RESET — Active-low reset |
| Chân 54 | NC — Not connected (per datasheet) |
| Chân 55 | AVDD — 3.3 V analog supply |
| Chân 56 | GND — Analog ground |
Ứng dụng tiêu biểu
ADC1243D125HD-C1 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADC1243D125HD-C1 — 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 | 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 |
Bảo phân biệt quan trọng
- 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)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
