ADS808Y/250 - 12-Bit 70MSPS ADC, HTQFP-48 | Texas Instruments
N.º da peça: ADS808Y/250 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $13.5 | $13,50 |
| 10 | $12.1 | $121,00 |
| 100 | $10.75 | $1.075,00 |
| 500 | $9.55 | $4.775,00 |
| 1.000 | $8.4 | $8.400,00 |
ADS808Y/250 Visão geral
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples a continuous analog voltage and quantizes each sample into a discrete digital code. Pipelined ADCs such as the ADS808 use a cascaded architecture of low-resolution stages (typically 1.5 bits per stage) with digital error correction, achieving the best trade-off between sampling speed (tens to hundreds of MSPS), resolution (10-14 bits), and active power. Within the broader hierarchy, the ADS808 sits under data converter -> ADC -> pipelined ADC -> high-speed ADC -> mixed-signal IC -> semiconductor. Pipelined ADCs are the dominant topology for communications, instrumentation, and imaging applications in the 10 MSPS to 250 MSPS range.
Key features of the ADS808 include 70 MSPS sampling rate, selectable full-scale input range, internal or external voltage reference, a low-jitter 0.25 ps RMS track-and-hold, single 5V analog supply operation, and a powerdown mode for portable applications. The differential or single-ended clock input accepts TTL/CMOS/LVPECL swings and provides flexible timing for synchronization with downstream DSP or FPGA logic. Its premium track-and-hold maintains low distortion even at IF frequencies, simplifying front-end design in communications receivers.
Typical applications for the ADS808Y/250 include CCD imaging digitizers, digital still cameras, basestation receiver IF digitizers, medical ultrasound beamformers, video processing, and high-speed data acquisition cards. The 12-bit/70-MSPS combination is well suited to digitizing signals in the 1 MHz to 35 MHz IF band where 70 dB SNR and SFDR are required for downstream demodulation. For test and measurement, the device serves as a general-purpose ADC front-end for digitizing oscilloscope channels and spectrum analyzer intermediate frequencies.
When designing with the ADS808, place a 0.1 uF ceramic decoupling capacitor within 5 mm of every supply pin, and use a 10 uF bulk tantalum or ceramic capacitor on AVDD and DRVDD to suppress switching noise. Provide a clean, low-jitter clock source (jitter < 1 ps RMS) to preserve SNR at high input frequencies, and route analog and digital grounds on separate planes joined at a single point beneath the IC.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para ADS808Y/250 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ADS808Y/250 (mesmo formato e footprint) — diferindo em Package, Resolution, Analog Supply Voltage, Sampling Rate, Data Interface.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ADS808Y/2K
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ADS808Y/250G4
✅ Drop-In✓ Em estoque
$8.95 / unidade
Ver ficha técnica →ADS805E/1KG4
✅ Drop-In✓ Em estoque
$6.94 / unidade
Ver ficha técnica →ADS7841PBG4
✅ Drop-In✓ Em estoque
$4.12 / unidade
Ver ficha técnica →ADS5424IPJYG3
✅ Drop-In✓ Em estoque
$25.1 / unidade
Ver ficha técnica →ADS850
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ADS808Y/250 Classificações máximas e características elétricas
| Resolução | 12 bit |
| Taxa de amostragem | 70 MSPS |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 3.0 V to 5.25 V |
| Input Type | Single-Ended or Differential |
| Full-Scale Input Range | Selectable (1.0 Vpp or 2.0 Vpp) |
| Reference | Internal or External |
| Track-and-Hold Jitter | 0.25 ps RMS |
| Clock Input | Single-Ended or Differential, TTL/CMOS/LVPECL |
| Powerdown Mode | Yes |
| Encapsulamento | HTQFP-48 (PHP) 7x7 mm |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40 C to +85 C |
| Nível MSL | 2 |
| Status RoHS | Compliant |
Configuração de pinos do ADS808Y/250
| Pino 1 | AVDD — Analog supply voltage, 5V nominal |
| Pino 2 | IN — Analog input, single-ended or positive differential |
| Pino 3 | INB — Complementary analog input for differential mode |
| Pino 4 | REF — Reference voltage (internal) or reference input (external mode) |
| Pino 5 | REFB — Reference ground, connect to analog ground |
| Pino 6 | FSR — Full-scale range select (1.0 Vpp or 2.0 Vpp) |
| Pino 7 | REFEN — Reference enable (internal vs external select) |
| Pino 8 | PD — Powerdown mode, active high |
| Pino 9 | AVSS — Analog ground |
| Pino 10 | AVDD — Analog supply voltage, 5V nominal |
| Pino 11 | AVSS — Analog ground |
| Pino 12 | CLK — Clock input, single-ended or positive differential |
| Pino 13 | CLKB — Complementary clock input for differential mode |
| Pino 14 | DRVDD — Digital output driver supply, 3.0V to 5.25V |
| Pino 15 | DRVSS — Digital output driver ground |
| Pino 16 | D11 — Data output bit 11 (MSB) |
| Pino 17 | D10 — Data output bit 10 |
| Pino 18 | D9 — Data output bit 9 |
| Pino 19 | D8 — Data output bit 8 |
| Pino 20 | D7 — Data output bit 7 |
| Pino 21 | D6 — Data output bit 6 |
| Pino 22 | D5 — Data output bit 5 |
| Pino 23 | D4 — Data output bit 4 |
| Pino 24 | D3 — Data output bit 3 |
| Pino 25 | D2 — Data output bit 2 |
| Pino 26 | D1 — Data output bit 1 |
| Pino 27 | D0 — Data output bit 0 (LSB) |
| Pino 28 | DRVSS — Digital output driver ground |
| Pino 29 | DRVDD — Digital output driver supply |
| Pino 30 | NC — Not connected |
| Pino 31 | NC — Not connected |
| Pino 32 | NC — Not connected |
| Pino 33 | AVSS — Analog ground |
| Pino 34 | AVDD — Analog supply voltage |
| Pino 35 | AVSS — Analog ground |
| Pino 36 | AVDD — Analog supply voltage |
| Pino 37 | AVSS — Analog ground |
| Pino 38 | AVDD — Analog supply voltage |
| Pino 39 | AVSS — Analog ground |
| Pino 40 | NC — Not connected |
| Pino 41 | NC — Not connected |
| Pino 42 | NC — Not connected |
| Pino 43 | NC — Not connected |
| Pino 44 | NC — Not connected |
| Pino 45 | NC — Not connected |
| Pino 46 | AVSS — Analog ground |
| Pino 47 | AVDD — Analog supply voltage |
| Pino 48 | AVSS — Analog ground |
Aplicações típicas
ADS808Y/250 é adequado para 6 aplicaçãos: CCD Imaging Digitizer, Base Station IF Receiver Digitizer, Medical Ultrasound Beamformer, High-Speed Data Acquisition Card, Digital Video Broadcast Processing, Industrial Test and Measurement.
CCD Imaging Digitizer
The ADS808Y/250 is well-suited for CCD imaging front-ends where 12-bit resolution at 70 MSPS captures each pixel's charge with adequate dynamic range for still and video cameras. Its 0.25 ps RMS track-and-hold jitter preserves SNR across the wide bandwidth of CCD output buffers, and the selectable full-scale range lets designers match CCD swing without external attenuation. In a typical CCD digitizer, the ADS808 sits after a correlated double-sampler and provides 12-bit parallel CMOS/TTL output to an image processor or FPGA.
Recomendado
Base Station IF Receiver Digitizer
In basestation receivers, the ADS808Y/250 digitizes IF signals in the 10-35 MHz band with SFDR sufficient for downstream digital demodulation. At 70 MSPS, the converter captures cellular IF signals with margin for oversampling and digital filtering. The flexible single-ended or differential clock input accommodates LVPECL backplane clocks common in basestation designs, while the 5V analog supply simplifies power tree integration with legacy RF front-end components.
Recomendado
Medical Ultrasound Beamformer
Ultrasound beamformer channels require sampling rates that capture the RF return signal with sufficient dynamic range to resolve subtle tissue features. The ADS808Y/250 delivers 12-bit/70 MSPS - a good fit for general-purpose ultrasound at frequencies up to 35 MHz. The 0.25 ps RMS track-and-hold jitter preserves SNR at high RF frequencies, while the 5V supply simplifies integration with analog front-end LNA and TGC stages. Multiple ADS808 channels can be synchronized via the flexible clock input for phased-array beamforming.
Recomendado
High-Speed Data Acquisition Card
PCI/PCIe data acquisition cards use the ADS808Y/250 as a general-purpose digitizer channel for oscilloscope, spectrum analyzer, and arbitrary waveform recorder front-ends. At 70 MSPS and 12 bits, the ADC supports real-time sampling of signals up to the Nyquist limit with sufficient resolution for most measurement tasks. The internal reference option reduces BOM, while the external reference path enables calibration against a precision voltage standard for metrology-grade accuracy.
Recomendado
Digital Video Broadcast Processing
The ADS808Y/250 digitizes component video and broadcast IF signals in set-top boxes, video editing equipment, and broadcast infrastructure. Its single 5V supply simplifies integration with analog video amplifier stages, while the selectable full-scale range adapts to different video signal levels (0.7 Vpp consumer, 1.0 Vpp broadcast). The 12-bit resolution exceeds broadcast video quality requirements and supports both SD and EDTV formats at 70 MSPS.
Recomendado
Industrial Test and Measurement
Test and measurement instruments such as benchtop oscilloscopes and spectrum analyzers use the ADS808Y/250 as a single-channel or multi-channel digitizer front-end. Its pipelined architecture supports repetitive and real-time sampling modes, and the differential clock input accepts precision LVPECL synthesizers for jitter-sensitive measurements. Powerdown mode allows standby operation when not digitizing, reducing thermal dissipation in multi-channel instruments.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADS808Y/250 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ADS808Y/2K | ADS808Y/250G4 | ADS805E/1KG4 | ADS5424IPJYG3 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | HTQFP-48 (PHP) 7x7 mm | HTQFP-48 (PHP) 7x7 mm - same | HTQFP-48 (PHP) 7x7 mm - same | HTQFP-48 (PHP) - same family | HTQFP-48 - same family |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 14 bit |
| Sampling Rate | 70 MSPS | 70 MSPS | 70 MSPS | 20 MSPS | 105 MSPS |
| Analog Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 5.0 V |
| Input Channels | 1 | 1 | 1 | 1 (with 4:1 mux) | 1 |
| Full-Scale Range | Selectable 1.0 Vpp or 2.0 Vpp | Selectable 1.0 Vpp or 2.0 Vpp | Selectable 1.0 Vpp or 2.0 Vpp | Selectable | Selectable |
| Pin Count | 48 | 48 | 48 | 48 | 48 |
Principais diferenciais
- Highest sample rate in the 48-HTQFP-48 12-bit TI ADS80x family (vs ADS805E/1KG4)
- Lower resolution than 14-bit pin-compatible alternates (vs ADS5424IPJYG3)
- Single-channel architecture versus built-in mux variants (vs ADS805E/1KG4)
Notas de projeto
Place a 0.1 uF X7R ceramic decoupling capacitor within 5 mm of every AVDD and DRVDD pin, and add a 10 uF bulk tantalum or ceramic capacitor on each supply rail. The ADS808Y/250 draws analog and digital supply current that varies with sampling rate - at 70 MSPS, expect ~250 mA from AVDD. Use a ferrite bead to isolate the analog 5V rail from noisy digital supplies.
Clock jitter directly degrades SNR at high input frequencies: SNR_limit = -20*log10(2*pi*fIN*jitter). At fIN = 35 MHz and 0.25 ps RMS jitter, the theoretical SNR limit is ~66 dB. Use a low-jitter clock source such as a clean crystal oscillator or LVPECL synthesizer. Route the clock trace over a continuous ground plane and keep it short to minimize reflections.
Route analog and digital grounds on separate planes joined at a single point beneath the IC exposed thermal pad. Place input traces as a 50 ohm controlled-impedance differential pair if using differential inputs, and keep analog input traces away from digital output traces (D0-D11). The exposed thermal pad must be soldered to a ground plane for rated thermal performance.
Do not exceed AVDD = 5.25V absolute maximum or the IC may suffer permanent damage. Drive unused NC pins to a known state (tie to ground or leave floating per datasheet) to avoid stray coupling. When using the internal reference, ensure REFEN pin is tied appropriately; when using an external reference, decouple REF pin with a 0.1 uF capacitor.
Informações de conformidade
RoHS compliant per TI product page. Standard /250 part may not be lead-free; select ADS808Y/250G4 for Pb-free reflow. Not AEC-Q100 qualified - this part is intended for industrial/commercial applications.
