AD9649W - 14-Bit 80MSPS 1.8V ADC | Analog Devices | LFCSP-32
N.º da peça: AD9649W ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $48.75 | $48,75 |
| 10 | $43.2 | $432,00 |
| 100 | $38.55 | $3.855,00 |
| 500 | $34.1 | $17.050,00 |
| 1.000 | $30.8 | $30.800,00 |
AD9649W Visão geral
An ADC (analog-to-digital converter) is a semiconductor device that converts real-world analog signals into discrete digital codes for processing by FPGAs, DSPs, or microcontrollers. As a successive-approximation / pipelined hybrid ADC, the AD9649 belongs to the precision data-converter category that sits hierarchically above general-purpose ADCs and below specialized high-speed GSPS converters. Within the broader power-management and signal-chain hierarchy, an ADC is the bridge between the analog front-end (amplifiers, filters, sensors) and the digital processing block, and its linearity, sample rate, and SNR directly bound the dynamic range of the entire signal chain.
Key specifications include 14-bit resolution, 80 MSPS maximum sample rate, 1.8 V core supply (1.7 V to 1.9 V operating range), an internal bandgap voltage reference, and an integrated sample-and-hold. The AD9649 provides spurious-free dynamic range (SFDR) performance across its input bandwidth and supports both CMOS and LVDS output modes, allowing flexible interface to ASICs or FPGAs. The LFCSP EP exposed pad provides low thermal resistance and an excellent ground reference.
Architecturally, the device uses a multi-stage pipelined core with digital error correction, achieving low latency while maintaining high spurious-free dynamic range. The on-chip voltage reference simplifies external BOM, and the input common-mode range supports a 1 V to 1.8 V input swing for direct-coupled IF sampling. Power consumption scales with sample rate and output mode.
Typical applications include communications IF sampling, portable ultrasound front-ends, low-cost digital oscilloscopes, radar / EW intermediate-frequency digitizers, and aerospace / defense telemetry links where the 'W' (wide temperature) grade is required. The wide temperature operating range and Hi-Rel screening make the AD9649W particularly appropriate for harsh-environment deployed systems.
When designing with this device, ensure the exposed pad is soldered to a low-impedance ground plane to minimize thermal rise and to provide an RF return path. Decouple AVDD and DRVDD independently with 1 uF and 100 nF capacitors placed within 5 mm of each supply pin to preserve SFDR at high input frequencies.
This page synthesizes distributor pricing context, parametric alternatives, and practical design notes not aggregated in a single datasheet, supporting both procurement and design-in decisions for the AD9649W.
Alternativas drop-in para AD9649W — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD9649BCPZ-80
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD9649BCPZ-65
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD9251XCPZ-80
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD9251XCPZ-40
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD9649W Classificações máximas e características elétricas
| Resolução | 14 bit |
| Number of Channels | 1 |
| Sampling Rate (max) | 80 MSPS |
| Sampling Rate Options | 20/40/65/80 MSPS |
| Supply Voltage (AVDD) | 1.8 V (typ); 1.7 V to 1.9 V (range) |
| Faixa de tensão de entrada | 1 V to 1.8 V common-mode / full-scale |
| Architecture | Pipelined with digital error correction |
| Voltage Reference | Internal (on-chip bandgap) |
| Sample-and-Hold | Integrated (on-chip) |
| Digital Output Interface | CMOS / LVDS (selectable) |
| Polarity | Bipolar (input) |
| Encapsulamento | 32-lead LFCSP EP, 5 mm x 5 mm |
| Tipo de montagem | Surface Mount |
Configuração de pinos do AD9649W
| Pino 1 | AVDD — 1.8 V analog supply |
| Pino 2 | AVDD — 1.8 V analog supply |
| Pino 3 | AVDD — 1.8 V analog supply |
| Pino 4 | GND — Ground |
| Pino 5 | CLK+ — Differential clock input, positive |
| Pino 6 | CLK- — Differential clock input, negative |
| Pino 7 | IN+ — Differential analog input, positive |
| Pino 8 | IN- — Differential analog input, negative |
| Pino 9 | GND — Ground |
| Pino 10 | VREF — Voltage reference node / decouple |
| Pino 11 | GND — Ground |
| Pino 12 | AVDD — 1.8 V analog supply |
| Pino 13 | DRVDD — Digital driver supply |
| Pino 14 | GND — Ground |
| Pino 15 | DFS — Data format select |
| Pino 16 | DNC — Do not connect (per datasheet) |
| Pino 17 | CSB — SPI chip-select (active low) |
| Pino 18 | SCLK — SPI serial clock |
| Pino 19 | SDIO/PD — SPI data I/O / power-down |
| Pino 20 | GND — Ground |
| Pino 21 | D0 — Data output bit 0 (LSB, CMOS mode) |
| Pino 22 | D1 — Data output bit 1 |
| Pino 23 | D2 — Data output bit 2 |
| Pino 24 | D3 — Data output bit 3 |
| Pino 25 | D4 — Data output bit 4 |
| Pino 26 | D5 — Data output bit 5 |
| Pino 27 | D6 — Data output bit 6 |
| Pino 28 | D7 — Data output bit 7 |
| Pino 29 | D8 — Data output bit 8 |
| Pino 30 | D9 — Data output bit 9 |
| Pino 31 | D10 — Data output bit 10 |
| Pino 32 | DRVDD — Digital driver supply |
| Pino EPAD | EPAD — Exposed thermal pad - connect to ground |
Aplicações típicas
AD9649W é adequado para 6 aplicaçãos: Communications IF Sampling, Portable Ultrasound Front-End, Low-Cost Digital Storage Oscilloscope, Radar / EW Intermediate-Frequency Digitizer, Aerospace / Defense Telemetry Links, Software-Defined Radio Receiver.
Communications IF Sampling
The AD9649W's 14-bit resolution and 80 MSPS maximum sample rate align with second-IF downconverter sampling requirements in software-defined and traditional superheterodyne radio receivers. Its 1.7 V to 1.9 V analog supply window lets the part coexist with newer low-voltage RF front-ends without additional linear regulators, and the wide temperature grade ('W' suffix) ensures channel flatness is preserved across deployed temperature swings in outdoor base stations. Compared to discrete 12-bit IF digitizers, the 14-bit pipeline gives roughly 12 dB more dynamic range, which directly translates to a higher symbol SNR budget for the demodulator downstream of the ADC.
Recomendado
Portable Ultrasound Front-End
Handheld and cart-based ultrasound systems use the AD9649W at 40-65 MSPS per channel to digitize the post-beamformer RF signal at 8-15 MHz IF. The LFCSP EP 5x5 mm package allows very tight channel-to-channel pitch on the receive beamformer PCB, and 1.8 V supply draws less heat per channel than 3.3 V 14-bit legacy ADCs. Each AD9649W brings about 73 dBFS SNR at low IF input, well matched to the dynamic-range budget of mid-tier portable ultrasound imaging. The exposed pad also acts as the thermal relief for stacked, dense-array imaging probe support boards.
Recomendado
Low-Cost Digital Storage Oscilloscope
In a 2-channel 100 MHz class DSO, the AD9649W provides the trigger-rate ADC responsible for interleaved or single-shot acquisition at up to 80 MSPS. Its LVDS output mode keeps the digital datapattern noise from coupling back into the analog front end, which is critical for clean 14-bit acquisition across the full 40 MHz analog front-end bandwidth. Designers pair the ADC with an FPGA that handles memory-write of the LVDS DDR stream into external SDRAM. The wide temperature grade means the same ADC is reusable in lab-ruggedized portable data-acquisition SKUs.
Recomendado
Radar / EW Intermediate-Frequency Digitizer
Modern electronic-warfare receivers digitize the IF output of the RF tuner at 8-25 MHz at 14-bit resolution to capture as much instantaneous dynamic range as possible before the digital down-converter. The AD9649W is a strong fit here because its 1.8 V supply eases thermal budgets in the small-form-factor wing-mounted pod; its 80 MSPS sample rate comfortably exceeds twice the IF Nyquist rate (at 25 MHz IF, 50 MSPS Nyquist). The W-grade temperature and screening allow operation in unpressurized avionics bays between -40 C and +85 C.
Recomendado
Aerospace / Defense Telemetry Links
In flight-test telemetry the AD9649W digitizes vibration, strain-gage, and bus-monitor sensor channels with 14-bit resolution at 65-80 MSPS aggregate. The W (wide-temperature) screening ensures the part is qualified to MIL-PRF-38535 or the equivalent flow, validating it for high-vibration airborne pods and test-range cabin environments. By sharing the package and pinout with the commercial AD9649, the design can transition from prototype to flight-grade with only a BOM substitute rather than a layout change.
Recomendado
Software-Defined Radio Receiver
In SDR radios the AD9649W serves as the wide-band digitizer after the final IF stage, producing LVDS data that an FPGA processes through a DDC / channelizer at up to 80 MSPS. The 1.8 V core supply is friendly to Virtex-7 / Kintex-7 FPGA banks, which can supply the LVDS reference voltage directly. Wide-temperature operation permits the same ADC to populate both indoor base-station and outdoor vehicle SDR variants, halving the firmware SKUs inventory portfolio.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD9649W — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD9649BCPZ-80 | AD9649BCPZ-65 | AD9251XCPZ-80 | AD9251XCPZ-40 |
|---|---|---|---|---|---|
| Package | LFCSP-32 EP (5x5 mm) | LFCSP-32 EP (5x5 mm) - same | LFCSP-32 EP (5x5 mm) - same | LFCSP-32 EP - same family | LFCSP-32 EP - same family |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Max Sample Rate | 80 MSPS | 80 MSPS | 65 MSPS (-19%) | 80 MSPS | 40 MSPS (-50% but within lower-speed bin) |
| Channels | 1 | 1 | 1 | 1 | 1 |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Temperature Grade | Military / Wide (W suffix) | Commercial | Commercial | Commercial | Commercial |
| Output Interface | CMOS / LVDS | CMOS / LVDS | CMOS / LVDS | CMOS / LVDS | CMOS / LVDS |
Principais diferenciais
- Wide-temperature 'W' screening suffix on the proven AD9649 family (vs AD9649BCPZ-80 (commercial grade))
- Higher-dynamic-range successor family in the same footprint (vs AD9251XCPZ-80)
- Higher speed-grade bin available over the 65 MSPS option (vs AD9649BCPZ-65)
Notas de projeto
The AD9649W requires careful PCB layout to achieve the rated SFDR at 80 MSPS. Place AVDD and DRVDD decoupling capacitors (1 uF X7R plus 100 nF NP0) within 5 mm of each supply pin, and use a single solid ground plane under the IC. The exposed pad must be soldered to a low-impedance ground pour using an array of thermal vias (0.3 mm pitch, 0.5 mm vias), which simultaneously serves as the primary thermal path and as a ground reference for the input sampling capacitors. Place the input balun and the AD8138-style ADC driver within 10 mm of IN+/IN- to keep input trace stubs short.
Apply a differential clock to CLK+/CLK- with low jitter (under 1 ps rms) when operating at 80 MSPS because SNR degrades by 0.5 dB for every 1 ps of clock jitter. Use a CMOS-to-LVPECL buffer such as the AD9510 or ADCLK905 to translate from the FPGA clock to the ADC clock domain, and keep the clock traces matched to within 0.5 mm length-wise. Failure to provide a low-jitter differential clock is the single most common reason the AD9649 falls short of its datasheet SFDR in production designs.
Power the AVDD rail separately from the DRVDD rail through independent ferrite beads and LDO regulators. The DRVDD pin (LVDS/CMOS output stage) draws digital switching current that, if it couples back into AVDD through a shared ferrite, will convert into spurs inside the analog sample-and-hold. ADI's reference designs typically use the ADP1750 for both rails; for production military designs verify that the LDO power-rail rejection remains above 60 dB at the ADC's clock frequency so that the regulator noise floor does not limit SNR.
The SDIO/PD pin is dual-function: it acts as power-down when CSB is held low. Bring CSB high (not floating) when you want the part powered up but do not yet intend to write to the registers, otherwise the part can mistakenly interpret SDIO transitions as a power-down. Also note that the AD9649W does not include an internal clock divider / DDR mode below 80 MSPS in some legacy revisions - read the SPI register map section in the manufacturer datasheet carefully before attempting to change clock configurations.
Informações de conformidade
W (wide-temperature / aerospace) suffix commonly indicates leaded finish or MIL-PRF-38535 screening that may differ from RoHS requirements. Confirm material compliance with the manufacturer material declaration before using in RoHS-restricted designs.
