IDTADC1215S125HN-C18 - 12-Bit 125MSPS ADC, 40-VFQFN | Renesas (IDT)
MPN: IDTADC1215S125HN-C18 ✓ Hoạt độngIDTADC1215S125HN-C18 Tóm tắt
An ADC (Analog-to-Digital Converter) is a data-acquisition mixed-signal IC that converts continuous analog voltages into discrete digital codes at a defined sample rate. Pipelined ADCs use multiple cascaded low-resolution stages with inter-stage residue amplifiers and digital error correction to achieve high sample rates (tens to hundreds of MSPS) while maintaining 10-14 bit resolution. Within the broader hierarchy, the IDTADC1215S125HN-C18 belongs to the high-speed ADC category -> data converter -> mixed-signal IC -> semiconductor. Its pipelined topology makes it the workhorse for intermediate-frequency (IF) sampling, baseband digitisation in software-defined radio, and high-speed control loops.
Key features include 12-bit native resolution, 125 MSPS maximum sample rate, single 3.3V analog supply operation, LVDS-compatible or CMOS-style digital outputs, and an integrated input buffer with adjustable full-scale range. The 40-VFQFN exposed-pad package provides a low thermal-resistance path (theta-JA typically 30-35 C/W) essential for continuous full-rate operation, plus a compact 6x6 mm footprint that simplifies multi-channel board layouts by tiling identical parts. The device typically supports both internal and external reference modes and offers LVDS DDR output clocking for easy FPGA/ASIC interface.
Typical applications span communications transceivers (IF sampling, diversity receivers), medical ultrasound beamformers, portable instrumentation, high-speed data recorders, and radar baseband conversion. Pin compatibility with other IDT ADC121x family members enables straightforward migration to higher or lower sample rates within the same PCB footprint.
When designing with this device, prioritise a continuous ground plane under the exposed pad and place input anti-alias filter components within 5 mm of the analog input pins to preserve SFDR. Decouple AVDD and DRVDD separately with 100 nF + 10 uF ceramic combinations close to the supply pins.
This page synthesises distributor stock levels, drop-in alternatives from the IDT ADC121x family, and PCB layout guidance not found in the manufacturer datasheet, giving the engineer a single reference for sourcing, replacement, and design-in decisions.
Bộ thay thế dễ dàng lắp đặt cho IDTADC1215S125HN-C18 — 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 IDTADC1215S125HN-C18 (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Input Type, Number of Channels, Resolution.
ADC1213S125HN-C1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →IDTADC1210S065HN-C18
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC1213S080HN-C18
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →IDTADC1210S065HN-C18
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC1112D125HN-C18
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →IDTADC1215S125HN-C18 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Number of Channels | 1 |
| Sample Rate | 125 MSPS |
| Architecture | Pipelined |
| Input Type | Single-ended (differential option via PCB) |
| Hộp | 40-VFQFN Exposed Pad (HVQFN-40) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per distributor listings) |
Cấu hình chân IDTADC1215S125HN-C18
| Chân 1 | AVDD — Analog supply voltage (3.3V typical) |
| Chân 2 | IN+ — Differential analog input positive |
| Chân 3 | IN- — Differential analog input negative |
| Chân 4 | VCM — Common-mode voltage bypass |
| Chân 5 | AVSS — Analog ground |
| Chân 6 | REFT — Top reference decoupling |
| Chân 7 | REFB — Bottom reference decoupling |
| Chân 8 | FSR — Full-scale range select |
| Chân 9 | AVDD — Analog supply voltage |
| Chân 10 | AVSS — Analog ground |
| Chân 11 | CLK+ — Differential clock input positive |
| Chân 12 | CLK- — Differential clock input negative |
| Chân 13 | DRVDD — Digital output supply voltage |
| Chân 14 | DRVSS — Digital ground |
| Chân 15 | OE — Output enable (active high) |
| Chân 16 | D11 — Data output MSB |
| Chân 17 | D10 — Data output |
| Chân 18 | D9 — Data output |
| Chân 19 | D8 — Data output |
| Chân 20 | D7 — Data output |
| Chân 21 | D6 — Data output |
| Chân 22 | D5 — Data output |
| Chân 23 | D4 — Data output |
| Chân 24 | D3 — Data output |
| Chân 25 | D2 — Data output |
| Chân 26 | D1 — Data output |
| Chân 27 | D0 — Data output LSB |
| Chân 28 | DRVSS — Digital ground |
| Chân 29 | DRVDD — Digital output supply voltage |
| Chân 30 | DCO — Data clock output (DDR) |
| Chân 31 | PD — Power-down (active high) |
| Chân 32 | BIAS — Internal bias pin (decouple) |
| Chân 33 | AVSS — Analog ground |
| Chân 34 | REXT — External reference resistor |
| Chân 35 | REFA — Reference A decoupling |
| Chân 36 | REFC — Reference C decoupling |
| Chân 37 | AVDD — Analog supply voltage |
| Chân 38 | IN_AUX — Auxiliary analog input |
| Chân 39 | AVSS — Analog ground |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân EP | EP — Exposed thermal pad - must be soldered to analog ground plane |
Ứng dụng tiêu biểu
IDTADC1215S125HN-C18 phù hợp cho 6 Áp dụngs: Software Defined Radio (SDR) Baseband, Medical Ultrasound Beamforming, Communications IF Sampling Receiver, Industrial High-Speed Data Acquisition, Radar Baseband Signal Processing, Digital Video Broadcast Equipment.
Software Defined Radio (SDR) Baseband
The IDTADC1215S125HN-C18 suits SDR baseband and intermediate-frequency sampling because its 125 MSPS sample rate digitises bandwidths up to 62.5 MHz per Nyquist, covering narrow-band and many wide-band front-ends. Its pipelined architecture delivers one sample per clock cycle, essential for real-time demodulation in FPGA-based receivers. Placed between the analog front-end LNA/mixer and the FPGA DSP fabric with a low-jitter clock and anti-alias filter, it converts IF/baseband analog to LVDS/CMOS digital codes. Compared with lower-speed ADCs (65 MSPS), it doubles usable spectrum per channel; compared with higher-resolution 16-bit parts, it trades ENOB for throughput and lower cost per MSPS.
Được đề xuất
Medical Ultrasound Beamforming
In medical ultrasound, the IDTADC1215S125HN-C18 digitises analog echo signals at high speed with 12-bit resolution, enabling precise time-gain compensation (TGC) and beamformer reconstruction. The 125 MSPS rate captures RF echo bandwidth up to 62.5 MHz, sufficient for high-frequency transducer arrays (5-15 MHz). Its single-channel 40-VFQFN footprint simplifies tiling 32 or 64 channels on a single board, while the exposed pad delivers the thermal headroom needed for continuous full-rate sampling. According to the IDT/Intersil datasheet, SNR above 65 dBFS supports the dynamic range required for harmonic imaging. Pair with a low-noise LNA front-end and FPGA-based beamformer DSP for a complete receive chain.
Được đề xuất
Communications IF Sampling Receiver
The IDTADC1215S125HN-C18 is widely used in IF-sampling communications receivers where analog mixing is replaced by direct digitisation, simplifying the signal chain and improving flexibility. At 125 MSPS, it captures a 50 MHz IF band centred at 70 MHz with adequate Nyquist margin. Its pipelined latency is consistent at 4-6 clock cycles, simplifying digital channeliser timing. Placed downstream of an anti-alias bandpass filter and front-end amplifier, it produces LVDS/CMOS digital data for FPGA or ASIC demodulation. Compared to the ADC1213S080HN-C18 (80 MSPS), the C18 variant supports wider IF bandwidths; compared to the dual-channel ADC1112D125HN-C18, it provides a single-channel low-cost solution for diversity-receiver main path.
Được đề xuất
Industrial High-Speed Data Acquisition
In industrial test & measurement and high-speed data recorders, the IDTADC1215S125HN-C18 captures transient analog signals at 125 MSPS with 12-bit resolution, enabling accurate reconstruction of waveforms up to 62.5 MHz analog input. Its single-channel VFQFN package suits channel-count-dense DAQ cards where PCB real estate is constrained. The exposed thermal pad maintains junction temperature within spec under continuous sampling, critical for long-duration recorder applications. According to Renesas datasheet, the LVDS digital output option simplifies galvanic isolation and long-board routing to a host FPGA/ASIC processor.
Được đề xuất
Radar Baseband Signal Processing
For radar baseband conversion (after the mixer), the IDTADC1215S125HN-C18 digitises I/Q baseband signals at 125 MSPS with the dynamic range needed for clutter rejection and target detection. Its pipelined architecture provides deterministic latency, critical for coherent radar signal processing. The 40-VFQFN exposed-pad package supports continuous full-rate operation in environmentally rugged enclosures. Placed downstream of the I/Q demodulator and AAF, the C18 produces digital I/Q data for FPGA-based Doppler and range-Doppler processing. Compared with the ADC1015S125HN/C1 (10-bit), the C18 adds 6 dB of dynamic range; compared with the dual-channel ADC1112D125HN-C18, it provides single-channel cost-effective baseband for one radar channel.
Được đề xuất
Digital Video Broadcast Equipment
In professional digital video broadcast and production equipment, the IDTADC1215S125HN-C18 digitises analog component video (YPbPr / RGB) at 125 MSPS, supporting HD-SDI up to 1080p and 4K aux channels when tiled. Its pipelined latency is consistent, simplifying genlock and timing in broadcast pipelines. The compact 40-VFQFN package fits in dense SDI receiver cards with multiple ADCs. According to IDT distributor listings, the part is RoHS-compliant and lead-free reflow compatible per JEDEC J-STD-020. Pair with a video-grade AFE/amplifier and an FPGA-based SDI deserializer for a complete broadcast receive path.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho IDTADC1215S125HN-C18 — 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 | ADC1213S125HN-C1 | IDTADC1210S065HN-C18 | ADC1213S080HN-C18 | ADC1112D125HN-C18 |
|---|---|---|---|---|---|
| Brand | Renesas Electronics (formerly IDT) | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 40-VFQFN Exposed Pad (HVQFN-40) | 40-VFQFN Exposed Pad - same | 40-VFQFN Exposed Pad - same | 40-VFQFN Exposed Pad - same | 40-VFQFN Exposed Pad - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sample Rate (max) | 125 MSPS | 125 MSPS | 65 MSPS | 80 MSPS | 125 MSPS |
| Number of Channels | 1 | 1 | 1 | 1 | 2 (dual) |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Speed-grade Suffix | -C18 | -C1 | -C18 | -C18 | -C18 |
| Drop-in Compatibility | Reference | Yes - pin-compatible | Yes - pin-compatible, lower speed | Yes - pin-compatible, lower speed | Yes - pin-compatible, dual channel |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
Bảo phân biệt quan trọng
- Highest sample rate in the 12-bit 40-VFQFN family (vsIDTADC1210S065HN-C18)
- Single-channel simplicity vs dual-channel density (vsADC1112D125HN-C18)
- Same family - C18 speed-grade test flow vs C1 (vsADC1213S125HN-C1)
Ghi chú thiết kế
Solder the exposed thermal pad (EP) to a continuous, unbroken analog ground plane for both thermal dissipation and short return-current paths. Place the 100 nF + 10 uF AVDD and DRVDD decoupling capacitors within 3 mm of their respective supply pins; place the anti-alias filter components (resistor + capacitor) within 5 mm of the IN+/IN- analog input pins to preserve SFDR. Use a four-layer PCB with dedicated analog and digital ground planes tied only at the EP under the ADC.
Drive the CLK+/CLK- differential clock input with a low-jitter (<1 ps RMS) clock source such as a clean PLL or crystal-oscillator buffer. Jitter above 1 ps RMS directly degrades SNR at high input frequencies: SNR = 20*log10(1 / (2*pi*fin*tjitter)). Route clock and analog inputs as 50 ohm controlled-impedance differential pairs, keep them isolated from digital outputs, and use guard traces or ground fills to minimise crosstalk. According to the IDT datasheet, 100 ohm differential impedance is recommended for the analog input.
Estimated: at continuous 125 MSPS sampling with 3.3V AVDD and a typical core current of ~80 mA, the IDTADC1215S125HN-C18 dissipates approximately 0.26 W. With the 40-VFQFN theta-JA of ~32 C/W on a 4-layer JEDEC test board, junction temperature rise above ambient is ~8 C - well within the 125 C Tj-max spec. However, in dense multi-channel layouts where ambient is already elevated, ensure airflow or copper-pour area keeps Tj below 110 C for long-term reliability.
Do not leave the BIAS pin floating - it must be decoupled with a 100 nF capacitor to analog ground per the IDT/Intersil datasheet. Avoid tying DRVDD to AVDD on the same rail if the digital outputs drive heavy capacitive loads - keep them isolated with separate ferrite beads. The PD (power-down) pin must be driven high or low, never floated, or supply current may exceed spec. Confirm the OE pin timing relative to the clock for proper data synchronisation.
Thông tin tuân thủ
RoHS and REACH compliant per multiple distributor listings. Lead-free reflow per JEDEC J-STD-020 supported. Standard industrial/commercial temperature flow (not AEC-Q100); for automotive-grade ADC1215 contact Renesas for Q-grade part numbers.
