AD9221AR-REEL - 12-Bit 1.5 MSPS ADC, 28-SOIC | Analog Devices
N.º de pieza: AD9221AR-REEL ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $12.85 | $12,85 |
| 10 | $11.56 | $115,60 |
| 100 | $10.27 | $1.027,00 |
| 500 | $9.12 | $4.560,00 |
| 1.000 | $8.05 | $8.050,00 |
AD9221AR-REEL Descripción general
An ADC (analog-to-digital converter) is a semiconductor device that transforms continuous analog voltage signals into discrete digital codes at a defined sampling rate. Within the signal chain hierarchy, the ADC sits between the analog front end (sensor, amplifier, anti-alias filter) and the digital processing block (DSP, FPGA, microcontroller). The 12-bit resolution places the AD9221 in the precision-conversion tier, delivering 4096 discrete output codes (LSB = VREF/4096) suitable for instrumentation, communications, and industrial control where 0.024% quantization steps are acceptable.
Key features of the AD9221AR-REEL include flexible sampling rates (the AD9221 family spans 1.5, 3.0, and 10.0 MSPS across AD9221/AD9223/AD9220), low power dissipation (a critical advantage for portable and densely-populated designs), on-chip sample-and-hold, and a single +5 V supply operation. The device is pin-compatible with the higher-speed AD9223 (3 MSPS) and AD9220 (10 MSPS), allowing designers to scale sampling rate up or down without PCB rework.
The pipelined architecture uses multiple low-resolution stages with inter-stage DACs and digital error correction, producing high throughput at moderate power. A precision bandgap reference and flexible input configuration support both single-ended and differential drive schemes, while the parallel CMOS-compatible digital interface simplifies connection to FPGAs, ASICs, or microcontrollers. Internal calibration ensures specified linearity over temperature.
Typical applications include medical imaging (ultrasound front-end digitization), communications IF sampling, instrumentation and test equipment, industrial process control loops, CCD digitizers, and sonar/radar signal processing. Its combination of 12-bit precision with mid-rate sampling suits applications where higher-resolution SAR converters are too slow but full 14-16 bit pipelines are unnecessary.
When designing with the AD9221AR-REEL, use a low-impedance input buffer (such as the AD8138 or AD8055) to drive the analog inputs, and place the reference bypass capacitor close to the REFCOM and VREF pins. Decouple AVDD and DRVDD separately to prevent digital switching noise from coupling into the analog front end. The wide SOIC footprint allows easy inspection and rework, an advantage for prototype builds.
This page synthesizes distributor stock and pricing, drop-in same-family alternatives (AD9220/AD9223), and practical design notes not collected in any single location on the manufacturer datasheet.
Alternativas directas para AD9221AR-REEL — 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 AD9221AR-REEL (mismo factor de forma y huella) — difiere en Supply Voltage.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
AD9223AR-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD9220AR-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD9221ARZ-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD9221AR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD9221ARS-REEL
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
AD9220ARS-REEL
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
AD9221AR-REEL Valores máximos y características eléctricas
| Number of Bits | 12 |
| Sampling Rate (Per Second) | 1.5 MSPS |
| Number of Inputs | 1 |
| Input Type | Single-Ended / Differential (pseudo) |
| Data Interface | Parallel |
| Architecture | Pipelined |
| Reference Type | Internal |
| Encapsulado / Carcasa | 28-SOIC (0.295, 7.50 mm Width) |
| Tipo de montaje | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Tensión de alimentación | Single +5 V (AVDD, DRVDD) |
| Input Range | 1 Vp-p or 2 Vp-p (configurable) |
| Recuento de pines | 28 |
Configuración de pines de AD9221AR-REEL
| Pin 1 | AIN — Analog input |
| Pin 2 | AVDD — +5 V analog supply |
| Pin 3 | DRVDD — +5 V digital supply |
| Pin 4 | REFCOM — Reference ground sense |
| Pin 5 | VREF — Internal reference voltage |
| Pin 6 | CAPB — Noise-reduction capacitor B |
| Pin 7 | CAPA — Noise-reduction capacitor A |
| Pin 8 | VINA — Differential input A |
| Pin 9 | VINB — Differential input B |
| Pin 10 | DRGND — Digital ground |
| Pin 11 | DB11 — Data output bit 11 (MSB) |
| Pin 12 | DB10 — Data output bit 10 |
| Pin 13 | DB9 — Data output bit 9 |
| Pin 14 | DB8 — Data output bit 8 |
| Pin 15 | DB7 — Data output bit 7 |
| Pin 16 | DB6 — Data output bit 6 |
| Pin 17 | DB5 — Data output bit 5 |
| Pin 18 | DB4 — Data output bit 4 |
| Pin 19 | DB3 — Data output bit 3 |
| Pin 20 | DB2 — Data output bit 2 |
| Pin 21 | DB1 — Data output bit 1 |
| Pin 22 | DB0 — Data output bit 0 (LSB) |
| Pin 23 | OTR — Out-of-range indicator |
| Pin 24 | CLK — Clock input |
| Pin 25 | NC — Not connected |
| Pin 26 | DRGND — Digital ground |
| Pin 27 | DRVDD — +5 V digital supply |
| Pin 28 | AVDD — +5 V analog supply |
Aplicaciones típicas
AD9221AR-REEL es adecuado para 6 aplicacións: Medical Ultrasound Imaging, Communications IF Sampling, Instrumentation and Test Equipment, Industrial Process Control Digitizers, CCD and Image Sensor Digitization, Sonar and Radar Signal Capture.
Medical Ultrasound Imaging
The AD9221AR-REEL is well suited to medical ultrasound front-end digitization, where 1.5 MSPS is adequate for low-frequency echo returns from shallow imaging depths. Its 12-bit resolution delivers sufficient grayscale depth for B-mode tissue imaging, while the on-chip sample-and-hold and pipelined architecture provide clean capture of echo returns. The wide-body 28-SOIC simplifies hand-soldering during prototype builds of bench-top ultrasound research systems. Typical designs pair the AD9221 with a low-noise preamplifier such as the AD8605 and an antialiasing filter ahead of AIN.
Recomendado
Communications IF Sampling
The AD9221AR-REEL fits communications intermediate-frequency (IF) sampling for narrowband receivers where 1.5 MSPS covers the signal bandwidth after downconversion. Its 12-bit resolution supports 60-65 dB SNR, sufficient for many narrow-band demodulation chains in software-defined radio (SDR) and instrumentation receivers. The parallel CMOS interface eases connection to FPGAs implementing DDC and demodulation. The pin-compatible AD9223 (3 MSPS) and AD9220 (10 MSPS) allow the same PCB to serve multiple receiver tiers.
Recomendado
Instrumentation and Test Equipment
Test-and-measurement digitizers, oscilloscope plug-in cards, and bench-top data acquisition modules benefit from the AD9221AR-REEL's 1.5 MSPS rate and 12-bit linearity. The wide SOIC package is convenient for lab builds and field-replaceable modules. Designers route the analog input via a wideband buffer, apply anti-alias filtering at ~750 kHz, then capture the parallel output directly into an FPGA or microcontroller. The pin-compatible AD9220 enables higher-rate product tiers on the same PCB layout.
Recomendado
Industrial Process Control Digitizers
The AD9221AR-REEL suits industrial process control loops where 12-bit resolution provides adequate precision for valve-position feedback, temperature monitoring, and 4-20 mA loop digitization. Its single +5 V supply simplifies integration with industrial 5 V rails, and the moderate 1.5 MSPS sampling rate allows efficient multi-channel multiplexing across process variables. Pair the ADC with an ADuM1411 isolator for high-voltage signal-chain isolation in factory automation systems.
Recomendado
CCD and Image Sensor Digitization
CCD line sensors and image-array digitizers use the AD9221AR-REEL for converting correlated-double-sampled pixel charge into 12-bit digital codes at moderate pixel rates. The pipelined architecture supports continuous pixel-stream conversion, while the wide SOIC simplifies prototype assembly for camera-link and machine-vision reference designs. The on-chip reference and input configuration support both ground-referenced and AC-coupled pixel signals.
Recomendado
Sonar and Radar Signal Capture
The AD9221AR-REEL is applicable to sonar hydrophone-array digitization and low-frequency radar IF sampling where 1.5 MSPS provides sufficient bandwidth. 12-bit resolution captures echo envelopes for target localization, and the parallel CMOS interface simplifies connection to FPGAs implementing beamforming and matched filtering. Designers often start with the AD9221 and migrate to AD9220 (10 MSPS) on the same 28-SOIC footprint for higher-bandwidth systems.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AD9221AR-REEL — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | AD9223AR-REEL | AD9220AR-REEL | AD9221ARZ-REEL | AD9221AR | AD9221ARS-REEL | AD9220ARS-REEL |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (wide body, 0.295 inch) | 28-SOIC (wide body) - same | 28-SOIC (wide body) - same | 28-SOIC (wide body) - same | 28-SOIC (wide body) - same | 28-SSOP - same family | 28-SSOP - same family |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 1.5 MSPS | 3 MSPS | 10 MSPS | 1.5 MSPS | 1.5 MSPS | 1.5 MSPS | 10 MSPS |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| Data Interface | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS |
| RoHS Compliance | Non-RoHS (SnPb finish) | Non-RoHS (SnPb) | Non-RoHS (SnPb) | RoHS compliant (lead-free) | Non-RoHS (SnPb) | Non-RoHS (SnPb) | Non-RoHS (SnPb) |
| Delivery Format | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
Diferenciadores clave
- Pin-compatible scalability across 1.5/3/10 MSPS sampling rates (frente a AD9220AR-REEL (10 MSPS))
- Lower power dissipation than AD9220 family members (frente a AD9223AR-REEL (3 MSPS))
- Mature, widely-documented family with extensive reference designs (frente a AD9224ARSZ (newer 14-bit pipelined ADC))
Notas de diseño
Place the input coupling capacitor and anti-aliasing RC network within 5 mm of the AIN pin to minimize parasitic inductance and kickback noise. Route the analog input traces over a continuous ground plane on the top layer, with no digital signal crossings. Keep the analog and digital ground planes separated until they join at a single point beneath the AD9221AR-REEL's exposed paddle (or AGND pin), preventing digital return currents from coupling into the analog front end.
Estimated: the AD9221 family at 1.5 MSPS draws approximately 60 mA from AVDD plus 10 mA from DRVDD, for total supply current near 70 mA and ~350 mW dissipation. Decouple AVDD with a 10 uF tantalum plus 0.1 uF ceramic at the supply pin, and provide separate decoupling for DRVDD to prevent digital switching noise (CMOS output edges at 1.5 MSPS produce ~30 mA transient steps) from corrupting the analog front end.
Avoid driving the AIN pin directly from a high-impedance op-amp output - the AD9221's switched-capacitor input draws transient charge kicks at every clock edge that can distort the previous sample's settling. Always buffer through a low-impedance driver such as the AD8055 or AD8138. Also, the CAPA/CAPB pins MUST have a 0.1 uF ceramic bypass capacitor to AVSS; omitting this capacitor causes degraded SNR and linearity.
The parallel CMOS digital outputs (DB0-DB11) toggle simultaneously on the rising CLK edge, producing significant ground bounce. Route the digital outputs as a tightly-coupled bus with ground traces between every other signal line, or use series damping resistors (22-33 ohm) at each output to slow the edge rate. Keep digital traces away from the analog input pin and reference pins; the wide SOIC package simplifies fan-out routing but does not eliminate the need for controlled-impedance digital traces when the outputs drive long PCB traces.
Información de cumplimiento
AD9221AR-REEL uses legacy SnPb (tin-lead) termination finish per the absence of the Z suffix in the MPN - not RoHS-compliant. For RoHS assemblies, use AD9221ARZ-REEL (lead-free equivalent). AEC-Q100 qualification is not applicable as this is a commercial-grade converter, not an automotive-qualified part.
