ADC12020CIVY - 12-Bit 20MSPS ADC | Texas Instruments | TQFP-32
N.º de pieza: ADC12020CIVY ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $11.5 | $11,50 |
| 10 | $10.35 | $103,50 |
| 100 | $9.2 | $920,00 |
| 500 | $8.15 | $4.075,00 |
| 1.000 | $7.25 | $7.250,00 |
ADC12020CIVY Descripción general
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog voltage and quantizes it into a discrete digital code. The pipelined architecture used in the ADC12020CIVY divides the conversion into multiple low-resolution stages, each amplifying the residue to the next stage. This approach enables high sampling rates at low power and is widely used in communications, imaging, and instrumentation where signal bandwidths reach tens of MHz. ADC ICs sit within the broader power management and signal chain hierarchy of mixed-signal semiconductors.
Key features of the ADC12020CIVY include an internal sample-and-hold, single +5 V or ±5 V supply operation, TTL/CMOS-compatible digital I/O from 2.35 V to 5 V, an on-chip reference buffer, power-down mode for standby, and pin compatibility with the ADC12010, ADC12040, ADC12L063, and ADC12L066 family members. The integrated reference buffer eliminates the need for an external ADC driver on low-to-medium input frequencies, simplifying board layout and BOM cost.
The proprietary pipelined sub-ranging architecture uses multi-bit-per-stage conversion with digital error correction across stages, yielding excellent linearity and low spurious content without the calibration complexity of higher-order pipeline converters. The internal sample-and-hold supports full Nyquist-rate sampling up to 20 MSPS with no missing codes, and the on-chip reference buffer provides a low-impedance reference to the internal CDAC network.
Typical applications include ultrasound and medical imaging front ends, CCD/cis sensor digitizers in flatbed scanners and digital copiers, digital video broadcasting set-top box IF sampling, communications receivers, and general-purpose high-speed data acquisition. The 185 mW typical power dissipation at 20 MSPS makes it well suited for portable and thermally constrained designs.
When designing with this ADC, ensure the analog input is properly buffered for source impedance and that the analog/digital grounds are separated to avoid coupling digital switching noise into the analog path. Decouple AVDD and DVDD with 100 nF ceramic capacitors placed as close to the pins as possible. Note the AVDD pin requires a clean +5 V supply; ripple above 50 mVpp may degrade SNR. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para ADC12020CIVY — 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 ADC12020CIVY (mismo factor de forma y huella) — difiere en Effective Number of Bits (ENOB), Input Type, Package, Power Down Mode, Resolution.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADC12020CIVY/NOPB
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADC12020CIVYX
✅ Sustitución directa✓ En stock
$10.1 / unidad
Ver hoja de datos →ADC12040CIVY
✅ Sustitución directa✓ En stock
$5.52 / unidad
Ver hoja de datos →ADC12010CIVY
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ADC12L063CIVY
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ADC12L066CIVY
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ADC12020CIVY Valores máximos y características eléctricas
| Resolución | 12 bits |
| Sampling Rate (FS) | 20 MSPS (min) |
| Number of Input Channels | 1 |
| Conversion Architecture | Pipelined with internal sample-and-hold |
| Analog Supply Voltage (AVDD) | +5 V (single) / +5 V analog with ±5 V option |
| Digital Supply Voltage (DVDD) | 2.35 V to 5 V |
| Differential Nonlinearity (DNL) | ±0.35 LSB (typ) |
| Effective Number of Bits (ENOB) | 11.3 bits (typ) at fIN = 10.1 MHz |
| Power Consumption (20 MHz) | 185 mW (typ) |
| Power Down Mode | Yes |
| Reference Buffer | On-chip |
| Digital I/O Compatibility | TTL/CMOS, 2.35 V to 5 V |
| Input Type | Single-ended analog input |
| Temperatura de funcionamiento | -40C to +85C |
| Encapsulado | 32-LQFP (CIVY) 7x7 mm |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (per /NOPB suffix option) |
Configuración de pines de ADC12020CIVY
| Pin 1 | AVIN — Analog input |
| Pin 2 | AVSS — Analog ground |
| Pin 3 | AVDD — Analog +5V supply |
| Pin 4 | REF_IN — Reference voltage input |
| Pin 5 | REFT — Reference top (decoupling) |
| Pin 6 | REFB — Reference bottom (decoupling) |
| Pin 7 | COMMON — Common-mode voltage bypass |
| Pin 8 | AVSS — Analog ground |
| Pin 9 | OE — Output enable (active low) |
| Pin 10 | PD — Power down (active high) |
| Pin 11 | DVDD — Digital supply (2.35V-5V) |
| Pin 12 | DVSS — Digital ground |
| Pin 13 | D11 — Data output bit 11 (MSB) |
| Pin 14 | D10 — Data output bit 10 |
| Pin 15 | D9 — Data output bit 9 |
| Pin 16 | D8 — Data output bit 8 |
| Pin 17 | D6 — Data output bit 6 |
| Pin 18 | D5 — Data output bit 5 |
| Pin 19 | D4 — Data output bit 4 |
| Pin 20 | D3 — Data output bit 3 |
| Pin 21 | D2 — Data output bit 2 |
| Pin 22 | D1 — Data output bit 1 |
| Pin 23 | D0 — Data output bit 0 (LSB) |
| Pin 24 | DVSS — Digital ground |
| Pin 25 | DRDY — Data ready clock output |
| Pin 26 | DVDD — Digital supply (2.35V-5V) |
| Pin 27 | CLK — Clock input |
| Pin 28 | CLK_B — Complementary clock input |
| Pin 29 | AVSS — Analog ground |
| Pin 30 | AVDD — Analog +5V supply |
| Pin 31 | AVIN_B — Complementary analog input |
| Pin 32 | NC — Not connected (per datasheet) |
Aplicaciones típicas
ADC12020CIVY es adecuado para 6 aplicacións: Ultrasound and Medical Imaging Front End, CCD/CIS Image Sensor Digitization, Communications Receiver IF Sampling, General-Purpose High-Speed Data Acquisition, Portable and Battery-Powered Imaging, Industrial Automation and Process Control.
Ultrasound and Medical Imaging Front End
The ADC12020CIVY is well suited for ultrasound and medical imaging front-end signal chains due to its 20 MSPS sampling rate, 11.3-bit ENOB at 10 MHz input, and 185 mW typical dissipation. The pipelined architecture with internal sample-and-hold captures transducer return signals with sufficient bandwidth for beam-formed imaging at clinical frequencies. The on-chip reference buffer eliminates the need for an external reference driver on the analog front end, simplifying the BOM for compact cart-based ultrasound systems. The 2.35 V to 5 V TTL/CMOS digital outputs interface cleanly to FPGAs or DSP processors that perform beamforming, envelope detection, and Doppler processing downstream. Power-down mode is useful for pulsed imaging where the ADC is duty-cycled between transmit and receive phases. Within a 32-LQFP (CIVY) footprint the part integrates easily into compact probe-head or main-board designs.
Recomendado
CCD/CIS Image Sensor Digitization
The ADC12020CIVY digitizes analog outputs from charge-coupled devices (CCD) and CMOS image sensors (CIS) in flatbed scanners, digital copiers, and machine-vision cameras. The 20 MSPS sample rate supports high-line-rate scanning of A4/Letter color sensors at 300-600 DPI, while the 12-bit resolution preserves color depth and tonal fidelity across the scanned image. The internal sample-and-hold accurately tracks the CCD output during pixel integration windows, and the on-chip reference buffer stabilizes the conversion reference against supply noise that is common in switching-power-supply-driven scanners. The 32-LQFP (CIVY) footprint is compatible with the pin-compatible ADC12L063/ADC12L066 family, allowing designers to trade off speed and power on a single PCB layout. The TTL/CMOS digital outputs connect directly to image processors or ASICs that perform color correction and compression.
Recomendado
Communications Receiver IF Sampling
The ADC12020CIVY samples intermediate-frequency (IF) signals in digital radio receivers, set-top boxes, and software-defined radio (SDR) front ends where its 20 MSPS rate supports Nyquist sampling of IFs up to 10 MHz. The pipelined architecture provides low spurious content and the 11.3-bit ENOB preserves signal-to-noise ratio for downstream demodulation. The +5 V single-supply or ±5 V analog supply option simplifies interface to existing RF front-end signal chains, while the 2.35 V to 5 V digital I/O can connect directly to baseband FPGAs without level translation. The on-chip reference buffer rejects supply noise that is present in receiver designs with switching LNA bias circuits. Designers can leverage pin compatibility with the ADC12040CIVY when a higher IF bandwidth is required, allowing the same PCB to host either part.
Recomendado
General-Purpose High-Speed Data Acquisition
The ADC12020CIVY serves as the core of PCI/PCIe, USB, or Ethernet-attached data acquisition cards used in industrial test, vibration monitoring, and laboratory instrumentation. The 20 MSPS sample rate captures transient signals up to 10 MHz with no missing codes, and the 12-bit resolution suits most general-purpose measurement requirements. The 185 mW typical power dissipation allows fan-less operation in compact desktop or rack-mount enclosures, while the -40C to +85C operating temperature range supports industrial deployments. The internal sample-and-hold and on-chip reference buffer reduce external component count, lowering total BOM cost and improving long-term reliability in continuous-duty acquisition systems. The TTL/CMOS digital outputs feed directly into FIFO memory or FPGA pre-processing stages.
Recomendado
Portable and Battery-Powered Imaging
The ADC12020CIVY fits portable imaging systems such as handheld scanners, portable ultrasound, and field inspection cameras where the 185 mW typical power at 20 MSPS is manageable for battery operation. The integrated power-down mode reduces standby current to a small fraction of full-conversion dissipation, enabling duty-cycled operation between active scan bursts and idle periods. The wide 2.35 V to 5 V digital supply range allows the digital outputs to interface directly to low-power FPGAs or processors operating from a single Li-ion cell, eliminating level-shifters that add quiescent current. The 32-LQFP (CIVY) 7x7 mm package is small enough to fit handheld form factors alongside the sensor, FPGA, and battery management circuits. Pin compatibility with the lower-power ADC12L063/ADC12L066 family supports a power-optimized variant.
Recomendado
Industrial Automation and Process Control
The ADC12020CIVY samples analog signals from sensors, actuators, and process-control loops in factory automation systems where its 12-bit resolution and 20 MSPS rate meet the bandwidth requirements of vibration, position, and motor-control feedback signals. The -40C to +85C operating temperature range supports deployment in factory-floor environments with elevated ambient temperatures and thermal cycling. The +5 V analog supply integrates with common 5 V industrial backplanes, and the TTL/CMOS digital outputs connect directly to industrial FPGAs or microcontrollers running real-time control loops. The pin-compatible ADC12040CIVY upgrade path allows the same PCB to host a higher-bandwidth variant when a process requires it. The internal sample-and-hold ensures accurate capture of fast transient events in motor current sensing and encoder feedback applications.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADC12020CIVY — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADC12020CIVY/NOPB | ADC12020CIVYX | ADC12040CIVY | ADC12010CIVY | ADC12L063CIVY | ADC12L066CIVY |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 32-LQFP (CIVY) 7x7 mm | 32-LQFP (CIVY) - same | 32-LQFP (CIVY) - same | 32-LQFP (CIVY) - same | 32-LQFP (CIVY) - same | 32-LQFP (CIVY) - same | 32-LQFP (CIVY) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate (max) | 20 MSPS | 20 MSPS | 20 MSPS | 40 MSPS | 10 MSPS | 63 MSPS | 66 MSPS |
| Analog Supply | +5 V (or ±5 V) | +5 V (or ±5 V) | +5 V (or ±5 V) | +5 V (or ±5 V) | +5 V (or ±5 V) | +3.3 V (low-power) | +3.3 V (low-power) |
| RoHS Compliant | Yes (NOPB suffix) | Yes | Yes | Yes | Yes | Yes | Yes |
Diferenciadores clave
- Pin-compatible with the entire ADC12010/ADC12040/ADC12L063/ADC12L066 family (frente a ADC12040CIVY)
- On-chip reference buffer eliminates external driver requirement (frente a Competitor ADCs requiring external reference buffers)
- Wide 2.35 V to 5 V digital I/O compatibility without level shifters (frente a ADCs with fixed 3.3 V or 5 V digital outputs)
Notas de diseño
The ADC12020CIVY requires a clean +5 V analog supply (AVDD) and a digital supply (DVDD) that can range from 2.35 V to 5 V. Decouple AVDD and DVDD with 100 nF ceramic capacitors placed as close to the respective pins as possible, plus a 10 uF bulk tantalum or ceramic capacitor on each rail. Ripple above 50 mVpp on AVDD will degrade SNR and effective number of bits; use an LDO rather than a switching regulator directly upstream of AVDD, or place adequate LC filtering between the switcher and the ADC supply pin.
Separate analog and digital ground planes are strongly recommended for the ADC12020CIVY. Connect AVSS and DVSS at a single point near the ADC, ideally directly under the package, to avoid ground loops that couple digital switching noise into the analog path. Route the analog input traces as short as possible and use a ground guard trace to shield them from digital output switching noise. Place the reference decoupling capacitors (REFT, REFB, COMMON) as close to their respective pins as possible - poor reference decoupling is a common source of degraded linearity.
Do not leave the OE (output enable) pin floating - tie it low to enable outputs or high to tri-state them. The PD (power-down) pin must be tied low for normal operation; leaving it floating can cause unpredictable behavior. The clock input (CLK) and complementary clock (CLK_B) should be driven by a clean low-jitter source; clock jitter directly degrades SNR according to the equation SNR = 6.02 * ENOB + 1.76 + 20*log10(1 / (2 * pi * fIN * tjitter)). A few picoseconds of jitter can cost 1-2 bits of effective resolution at 10 MHz input.
Información de cumplimiento
RoHS compliance confirmed via /NOPB lead-free finish option per TI part numbering. AEC-Q100 not applicable for general-purpose industrial/commercial ADC. Halogen-free status not confirmed in provided data.
