IDTADC1215S125HN-C18 - 12-Bit 125MSPS ADC, 40-VFQFN | Renesas (IDT)
N.º de pieza: IDTADC1215S125HN-C18 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $24.5 | $24,50 |
| 10 | $22.1 | $221,00 |
| 100 | $19.5 | $1.950,00 |
| 500 | $17.2 | $8.600,00 |
| 1.000 | $15.8 | $15.800,00 |
IDTADC1215S125HN-C18 Descripción general
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.
Alternativas directas para IDTADC1215S125HN-C18 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con IDTADC1215S125HN-C18 (mismo factor de forma y huella) — difiere en Package, RoHS Status, Input Type, Number of Channels, Resolution.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADC1213S125HN-C1
✅ Sustitución directa✓ En stock
$18.45 / unidad
Ver hoja de datos →IDTADC1210S065HN-C18
✅ Sustitución directa✓ En stock
$10.05 / unidad
Ver hoja de datos →ADC1213S080HN-C18
✅ Sustitución directa✓ En stock
$9.45 / unidad
Ver hoja de datos →IDTADC1210S065HN-C18
✅ Sustitución directa✓ En stock
$10.05 / unidad
Ver hoja de datos →ADC1112D125HN-C18
✅ Sustitución directa✓ En stock
$9.48 / unidad
Ver hoja de datos →IDTADC1215S125HN-C18 Valores máximos y características eléctricas
| Resolución | 12 bit |
| Number of Channels | 1 |
| Sample Rate | 125 MSPS |
| Architecture | Pipelined |
| Input Type | Single-ended (differential option via PCB) |
| Encapsulado | 40-VFQFN Exposed Pad (HVQFN-40) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (per distributor listings) |
Configuración de pines de IDTADC1215S125HN-C18
| Pin 1 | AVDD — Analog supply voltage (3.3V typical) |
| Pin 2 | IN+ — Differential analog input positive |
| Pin 3 | IN- — Differential analog input negative |
| Pin 4 | VCM — Common-mode voltage bypass |
| Pin 5 | AVSS — Analog ground |
| Pin 6 | REFT — Top reference decoupling |
| Pin 7 | REFB — Bottom reference decoupling |
| Pin 8 | FSR — Full-scale range select |
| Pin 9 | AVDD — Analog supply voltage |
| Pin 10 | AVSS — Analog ground |
| Pin 11 | CLK+ — Differential clock input positive |
| Pin 12 | CLK- — Differential clock input negative |
| Pin 13 | DRVDD — Digital output supply voltage |
| Pin 14 | DRVSS — Digital ground |
| Pin 15 | OE — Output enable (active high) |
| Pin 16 | D11 — Data output MSB |
| Pin 17 | D10 — Data output |
| Pin 18 | D9 — Data output |
| Pin 19 | D8 — Data output |
| Pin 20 | D7 — Data output |
| Pin 21 | D6 — Data output |
| Pin 22 | D5 — Data output |
| Pin 23 | D4 — Data output |
| Pin 24 | D3 — Data output |
| Pin 25 | D2 — Data output |
| Pin 26 | D1 — Data output |
| Pin 27 | D0 — Data output LSB |
| Pin 28 | DRVSS — Digital ground |
| Pin 29 | DRVDD — Digital output supply voltage |
| Pin 30 | DCO — Data clock output (DDR) |
| Pin 31 | PD — Power-down (active high) |
| Pin 32 | BIAS — Internal bias pin (decouple) |
| Pin 33 | AVSS — Analog ground |
| Pin 34 | REXT — External reference resistor |
| Pin 35 | REFA — Reference A decoupling |
| Pin 36 | REFC — Reference C decoupling |
| Pin 37 | AVDD — Analog supply voltage |
| Pin 38 | IN_AUX — Auxiliary analog input |
| Pin 39 | AVSS — Analog ground |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin EP | EP — Exposed thermal pad - must be soldered to analog ground plane |
Aplicaciones típicas
IDTADC1215S125HN-C18 es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para IDTADC1215S125HN-C18 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Highest sample rate in the 12-bit 40-VFQFN family (frente a IDTADC1210S065HN-C18)
- Single-channel simplicity vs dual-channel density (frente a ADC1112D125HN-C18)
- Same family - C18 speed-grade test flow vs C1 (frente a ADC1213S125HN-C1)
Notas de diseño
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.
Información de cumplimiento
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.
