ADS831E/2K5G4 - 8-Bit 80MSPS ADC, 5V, SSOP-20 | Texas Instruments
N.º da peça: ADS831E/2K5G4 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $7.2 | $7,20 |
| 10 | $6.48 | $64,80 |
| 100 | $5.76 | $576,00 |
| 500 | $5.18 | $2.590,00 |
| 1.000 | $4.61 | $4.610,00 |
ADS831E/2K5G4 Visão geral
An ADC (analog-to-digital converter) is a data-acquisition integrated circuit that samples continuous analog signals and quantizes them into discrete digital codes for processing by microcontrollers, DSPs, FPGAs, or ASICs. Pipeline ADCs like the ADS831E use a multi-stage architecture that converts one sample per clock cycle after a fixed latency, achieving a strong balance between sampling speed, resolution, and power consumption; they sit within the broader taxonomy of Nyquist-rate ADCs alongside successive-approximation register (SAR) and flash converters, and belong to the data-converter family of mixed-signal ICs.
The device includes a high-bandwidth track-and-hold (T/H), an 8-bit quantizer, an internal bandgap-derived reference that can be overdriven by an external reference, and a programmable input range set by an external resistor. The differential input mode yields improved spurious-free dynamic range (SFDR) compared to single-ended operation, which is valuable when sampling IF or baseband signals in communications receivers. CMOS pipeline architecture delivers low-power operation at 275 mW typical while maintaining the 49 dB SNR figure at the Nyquist frequency.
Typical applications include CCD imaging front ends, digital still cameras, video capture cards, set-top box video digitizers, portable medical imaging devices, communications IF sampling, and general-purpose high-speed data acquisition. The 5 V analog supply and parallel interface simplify integration into legacy industrial designs and FPGA-based DSP pipelines. When designing with this part, observe the input common-mode range when using the internal reference and place the input RC network close to the analog input pin to preserve the wide track-and-hold bandwidth; for best SNR use the differential input mode and bypass the reference pin with a low-ESR 10 uF tantalum plus 0.1 uF ceramic combination as recommended in the manufacturer datasheet.
Alternativas drop-in para ADS831E/2K5G4 — 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 ADS831E/2K5G4 (mesmo formato e footprint) — diferindo em Architecture, Package, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ADS831E/2K5
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ADS831E
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →ADS830EG4
✅ Drop-In✓ Em estoque
$5.25 / unidade
Ver ficha técnica →ADS831E/2K5G4 Classificações máximas e características elétricas
| Resolução | 8 bits |
| Taxa de amostragem | 80 MSPS |
| Architecture | Pipelined |
| Number of Channels | 1 (single-ended or differential input) |
| Data Interface | Parallel |
| Tensão de alimentação | 4.75 V to 5.25 V (single +5 V) |
| Power Dissipation | 275 mW typical |
| SNR | 49 dB |
| DNL | 0.35 LSB |
| Programmable Input Range | ±2 Vp-p |
| Reference | Internal or external |
| Encapsulamento | 20-SSOP (0.154 inch / 3.90 mm body width) |
| Tipo de montagem | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Status RoHS | Compliant |
Configuração de pinos do ADS831E/2K5G4
| Pino 1 | CLK — Convert clock input (rising edge initiates conversion) |
| Pino 2 | DVDD — Digital supply (+5 V) |
| Pino 3 | DGND — Digital ground |
| Pino 4 | D0 — Data output bit 0 (LSB) |
| Pino 5 | D1 — Data output bit 1 |
| Pino 6 | D2 — Data output bit 2 |
| Pino 7 | D3 — Data output bit 3 |
| Pino 8 | D4 — Data output bit 4 |
| Pino 9 | D5 — Data output bit 5 |
| Pino 10 | D6 — Data output bit 6 |
| Pino 11 | D7 — Data output bit 7 (MSB) |
| Pino 12 | OE — Output enable (active low) |
| Pino 13 | AGND — Analog ground |
| Pino 14 | AVDD — Analog supply (+5 V) |
| Pino 15 | REF — Reference voltage (internal or external) |
| Pino 16 | REFOUT — Internal reference output |
| Pino 17 | RG — Input range gain resistor |
| Pino 18 | IN — Analog input (single-ended or +differential) |
| Pino 19 | IN — Complementary analog input (-differential) |
| Pino 20 | NC — Not connected (per datasheet) |
Aplicações típicas
ADS831E/2K5G4 é adequado para 6 aplicaçãos: CCD Imaging Front End, Digital Still Camera Image Pipeline, Video Capture Card Digitizer, Set-Top Box Video ADC, Portable Medical Imaging, Communications IF Sampling.
CCD Imaging Front End
The ADS831E/2K5G4's 80 MSPS sampling rate and 49 dB SNR make it well matched to digitize the analog output of CCD line and area sensors used in industrial inspection cameras. CCD video bandwidths up to several MHz sit well below the Nyquist limit of 40 MHz, allowing full-bandwidth capture without aliasing. The 0.35 LSB DNL preserves grayscale linearity critical for image fidelity in machine-vision pipelines, while the single +5 V supply simplifies analog front-end power design. The differential input mode can be enabled to reject common-mode noise from long CCD cable runs. Recommended companion parts: an analog CCD-output buffer op-amp and a clock generator for CCD drive timing.
Recomendado
Digital Still Camera Image Pipeline
In digital still cameras the ADS831E/2K5G4 digitizes sensor output streams at up to 80 MSPS, supporting preview-mode throughput and burst-capture bursts in compact designs. The 275 mW typical dissipation keeps thermal rise inside small handheld enclosures, and the SSOP-20 footprint fits camera PCB area budgets where TSSOP and QFN options would be acceptable but not required. The parallel interface connects directly to image DSP or ASIC data ports without serializer overhead, simplifying firmware. The ±2 Vp-p input range covers common image-sensor full-scale outputs. Recommended companion parts: an image DSP and a low-dropout regulator for analog supply rails.
Recomendado
Video Capture Card Digitizer
For PC-based video capture cards the ADS831E/2K5G4 digitizes composite or component video at 80 MSPS, sufficient to handle SD and many HD video bandwidths after anti-alias filtering. The parallel CMOS interface drops straight into FPGA capture FIFOs, eliminating serializer latency in real-time processing paths. The 49 dB SNR preserves luma and chroma fidelity needed for broadcast-quality encoding, while 0.35 LSB DNL avoids contouring artifacts in smooth gradients. Single +5 V operation eases analog front-end power, and the SSOP-20 package suits multi-channel cards with limited PCB area. Recommended companion parts: an FPGA capture device and an anti-alias filter op-amp.
Recomendado
Set-Top Box Video ADC
In set-top box and home-theater designs the ADS831E/2K5G4 handles video A/D conversion for analog baseband inputs, such as composite video from legacy playback devices. At 80 MSPS the converter digitizes the full 6 MHz video bandwidth with margin, and the parallel interface feeds video decoders and MPEG encoders without bus bottlenecks. Differential input mode suppresses ground noise from the analog tuner section, and the 275 mW dissipation keeps the chassis thermal envelope small. Internal reference operation minimizes external BOM count, important in cost-sensitive consumer A/V products. Recommended companion parts: a video decoder and an audio ADC companion.
Recomendado
Portable Medical Imaging
Portable medical imaging equipment such as handheld ultrasound probes and point-of-care scanners benefits from the ADS831E/2K5G4's 275 mW low-power operation and single +5 V supply, which extend battery life and shrink the power-chain BOM. The 80 MSPS rate covers low-frequency ultrasound IF and physiological-signal digitization, while the 49 dB SNR preserves diagnostic signal fidelity. The SSOP-20 package enables compact board layouts in handheld enclosures where every square millimeter matters. Differential input mode rejects common-mode noise from patient-connected analog front ends, improving measurement integrity. Recommended companion parts: a low-noise op-amp for the analog front end and an MCU for data transport.
Recomendado
Communications IF Sampling
The ADS831E/2K5G4 serves communications IF sampling in narrow-band receivers where 80 MSPS and 8-bit resolution are sufficient for demodulation. Differential input mode improves SFDR for signals near the ADC's Nyquist frequency, which is critical when digitizing IF strips in software-defined radio front ends. The CMOS pipeline architecture consumes only 275 mW, keeping the receiver chain thermally manageable. Internal reference simplifies design, and the parallel interface streams samples into DSPs or FPGAs implementing demodulation. The SSOP-20 footprint is friendly to multi-channel receiver cards. Recommended companion parts: an IF amplifier and a baseband DSP.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADS831E/2K5G4 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ADS831E/2K5 | ADS831E | ADS830EG4 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits |
| Sampling Rate | 80 MSPS | 80 MSPS | 80 MSPS | 60 MSPS (-25%) |
| SNR | 49 dB | 49 dB | 49 dB | 49 dB (similar) |
| Packaging | Tape & Reel (G4) | Tape & Reel | Tube | Tape & Reel (G4) |
Principais diferenciais
- Higher sampling rate than ADS830E in same SSOP-20 footprint (vs ADS830EG4)
- Tape-and-reel packaging with Pb-free G4 designation (vs ADS831E (tube))
- Differential input mode for SFDR-sensitive applications (vs ADS831E/2K5 (single-ended typical use))
Notas de projeto
Estimated: the ADS831E/2K5G4 draws 275 mW typical from a single +5 V supply, or roughly 55 mA total. The SSOP-20 package has a thermal resistance (theta_JA) of approximately 70 C/W on a standard 2-layer board, producing a junction temperature rise of only ~3.8 C at 55 mA - well within the -40 to +85 C industrial range without a heatsink. Decouple AVDD and DVDD separately with 0.1 uF ceramic plus 10 uF tantalum capacitors placed within 5 mm of the supply pins.
Route analog and digital grounds as separate planes joined at a single point under the AGND pin to prevent digital switching noise from coupling into the analog input. Place the input RC network (anti-alias filter) within 5 mm of the IN pins; use a ground-referenced 0.1 uF C0G ceramic in series with a 50 ohm source resistor for a flat passband up to ~30 MHz. The CLK trace should be kept short and routed away from analog input traces to minimize digital feed-through.
Estimated: when using the internal reference, bypass REF with 10 uF low-ESR tantalum plus 0.1 uF ceramic to keep reference noise below the SNR limit; omitting this bypass typically degrades SNR by 3-5 dB. Do not exceed the absolute maximum AVDD of 6 V, and ensure CLK duty cycle sits between 45% and 55% - duty-cycle distortion directly translates into aperture-timing jitter and degrades SNR at high input frequencies above 10 MHz.
Informações de conformidade
RoHS-compliant per TI product page; G4 suffix in the ordering code designates Pb-free finish. Halogen-free status not explicitly stated in the verified web data - left unknown.
