IDTADC1215S125HN-C18 - 12-Bit 125MSPS ADC, 40-VFQFN | Renesas (IDT)
MPN: IDTADC1215S125HN-C18 ✓ פעילIDTADC1215S125HN-C18 סקירה
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.
חלופות תחליף ישיר עבור IDTADC1215S125HN-C18 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם IDTADC1215S125HN-C18 (אותו גורם צורה וטביעת רגל) — שונים ב Package, RoHS Status, Input Type, Number of Channels, Resolution.
ADC1213S125HN-C1
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←IDTADC1210S065HN-C18
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADC1213S080HN-C18
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←IDTADC1210S065HN-C18
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADC1112D125HN-C18
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←IDTADC1215S125HN-C18 דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 12 bit |
| Number of Channels | 1 |
| Sample Rate | 125 MSPS |
| Architecture | Pipelined |
| Input Type | Single-ended (differential option via PCB) |
| מארז | 40-VFQFN Exposed Pad (HVQFN-40) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant (per distributor listings) |
תצורת פינים של IDTADC1215S125HN-C18
| פין 1 | AVDD — Analog supply voltage (3.3V typical) |
| פין 2 | IN+ — Differential analog input positive |
| פין 3 | IN- — Differential analog input negative |
| פין 4 | VCM — Common-mode voltage bypass |
| פין 5 | AVSS — Analog ground |
| פין 6 | REFT — Top reference decoupling |
| פין 7 | REFB — Bottom reference decoupling |
| פין 8 | FSR — Full-scale range select |
| פין 9 | AVDD — Analog supply voltage |
| פין 10 | AVSS — Analog ground |
| פין 11 | CLK+ — Differential clock input positive |
| פין 12 | CLK- — Differential clock input negative |
| פין 13 | DRVDD — Digital output supply voltage |
| פין 14 | DRVSS — Digital ground |
| פין 15 | OE — Output enable (active high) |
| פין 16 | D11 — Data output MSB |
| פין 17 | D10 — Data output |
| פין 18 | D9 — Data output |
| פין 19 | D8 — Data output |
| פין 20 | D7 — Data output |
| פין 21 | D6 — Data output |
| פין 22 | D5 — Data output |
| פין 23 | D4 — Data output |
| פין 24 | D3 — Data output |
| פין 25 | D2 — Data output |
| פין 26 | D1 — Data output |
| פין 27 | D0 — Data output LSB |
| פין 28 | DRVSS — Digital ground |
| פין 29 | DRVDD — Digital output supply voltage |
| פין 30 | DCO — Data clock output (DDR) |
| פין 31 | PD — Power-down (active high) |
| פין 32 | BIAS — Internal bias pin (decouple) |
| פין 33 | AVSS — Analog ground |
| פין 34 | REXT — External reference resistor |
| פין 35 | REFA — Reference A decoupling |
| פין 36 | REFC — Reference C decoupling |
| פין 37 | AVDD — Analog supply voltage |
| פין 38 | IN_AUX — Auxiliary analog input |
| פין 39 | AVSS — Analog ground |
| פין 40 | NC — Not connected (per datasheet) |
| פין EP | EP — Exposed thermal pad - must be soldered to analog ground plane |
יישומים טיפוסיים
IDTADC1215S125HN-C18 מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור IDTADC1215S125HN-C18 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Highest sample rate in the 12-bit 40-VFQFN family (לעומתIDTADC1210S065HN-C18)
- Single-channel simplicity vs dual-channel density (לעומתADC1112D125HN-C18)
- Same family - C18 speed-grade test flow vs C1 (לעומתADC1213S125HN-C1)
הערות תכנון
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.
מידע על תאימות
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.
