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Texas Instruments AD3421QRWETQ1
- Part No.:
- AD3421QRWETQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
AD3421QRWETQ1.pdf
- Description:
- IC ADC 12BIT PIPELINED 56VQFNP
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
ADC3421QRWETQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive quad-channel 12-bit 25-MSPS analog-to-digital converter with serial LVDS interface, 71.1 dBFS SNR at 10 MHz input, 90 dBc SFDR, and 105 dB channel isolation - deployed in solid-state LiDAR and radar signal acquisition systems.
For engineers reviewing the ADC3421QRWETQ1 datasheet, ADC3421QRWETQ1 pinout, ADC3421QRWETQ1 application, or ADC3421QRWETQ1 equivalent, key selection criteria include multichip synchronization support via SYSREF, ultra-low 44 mW/channel power at 25 MSPS, flexible input clock division (÷1/÷2/÷4), and VQFNP-56 package thermal performance (RθJA = 20.3°C/W).
Technical Context
The ADC3421QRWETQ1 integrates four independent 12-bit SAR-based ADC cores with internal PLL for bit clock generation, supporting 2-wire LVDS serialization per channel. Each channel features dedicated differential analog inputs (INxP/INxM), independent dither and chopper options, and programmable gain/offset calibration registers.
Its digital interface includes SPI control (SEN/SCLK/SDATA/SDOUT), LVDS frame/bit clocks (FCLKP/FCLKM, DCLKP/DCLKM), and SYSREFP/SYSREFM for JESD204B-compatible system-level timing alignment. The device operates across –40°C to +125°C with dual 1.8-V supplies (AVDD/DVDD) and supports 15–25 MSPS sampling rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete amplitude levels for high-fidelity digitization of wide-dynamic-range sensor signals. |
| Sampling Rate | 25 MSPS - enables real-time capture of RF-bandwidth signals up to 230 MHz (Nyquist-limited) in automotive radar front ends. |
| SNR @ 10 MHz | 71.1 dBFS - ensures >11.5 ENOB for accurate amplitude measurement of low-level echoes in LiDAR time-of-flight processing. |
| Channel Isolation | 105 dB - prevents crosstalk-induced error between adjacent channels during simultaneous multi-beam acquisition in smart antenna arrays. |
| Power per Channel | 44 mW at 25 MSPS - allows thermal-constrained placement in compact ADAS ECU modules without forced cooling. |
| Analog Input BW | 540 MHz - supports direct RF sampling of IF signals up to L-band without external downconversion in radar receivers. |
| LVDS Interface | 2-wire serial per channel - reduces PCB routing density by 75% vs parallel interfaces, enabling high-channel-count designs in space-limited modules. |
Pinout & Package
VQFNP-56 (8.00 mm × 8.00 mm) thermally enhanced QFN package with exposed thermal pad connected to ground; rated for automotive Grade 1 (–40°C to +125°C ambient).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INAP / INAM | Differential analog input (Channel A) | Accepts 2-VPP full-scale differential signal; 540-MHz bandwidth enables direct sampling of radar IF outputs. |
| DA0P / DA0M DA1P / DA1M | LVDS data outputs (Channel A, wire-0/1) | Serialize 12-bit samples at 150 Mbps per pair; require 100-Ω differential termination for signal integrity. |
| FCLKP / FCLKM DCLKP / DCLKM | LVDS frame & bit clocks | Provide synchronous timing for LVDS data recovery; frame clock aligns sample boundaries across all four channels. |
| SYSREFP / SYSREFM | Differential system reference input | Enables deterministic latency and multidevice synchronization for coherent beamforming in phased-array radar. |
| PDN / RESET | Power-down & hardware reset | PDN supports SPI-configurable low-power standby (34 mW); RESET provides hard reset with internal 150-kΩ pulldown. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation from –40°C to +125°C junction temperature in engine bay and ADAS sensor modules. |
| Internal dither and chopper | Reduces harmonic distortion and quantization noise floor - improves SFDR by up to 5 dBc in narrowband applications like motor control feedback. |
| Flexible clock divider (÷1/÷2/÷4) | Allows use of common system clocks (e.g., 100 MHz) while maintaining precise 25-MSPS sampling - simplifies clock tree design. |
| Multichip synchronization support | Enables phase-aligned sampling across multiple ADC3421QRWETQ1 devices using shared SYSREF - critical for coherent radar imaging. |
| Quad-channel isolation | 105 dB near-channel crosstalk suppression maintains signal fidelity when digitizing spatially adjacent sensor channels in LiDAR arrays. |
Applications
| Solid-State LiDAR | Radar & Smart Antenna Arrays |
|---|---|
Use Scenario: Digitizing time-of-flight return pulses from 905-nm laser diodes with nanosecond-level timing resolution. IC Role / Device Role / Timing Role: Quad-channel ADC capturing synchronized echo waveforms across four receiver channels for point-cloud generation. Use Value: 71.1 dBFS SNR and 105 dB channel isolation preserve weak echo amplitude accuracy across 150-m detection range. | Use Scenario: Simultaneous sampling of RF IF signals from 4-element phased-array radar receivers operating at 77 GHz. IC Role / Device Role / Timing Role: High-linearity digitizer providing phase-coherent baseband data for beam steering algorithms. Use Value: Multichip SYSREF synchronization ensures <±70 ps aperture delay matching - essential for sub-degree angular resolution. |
| Motor Control Feedback | Nondestructive Testing |
Use Scenario: Capturing high-frequency current/voltage waveforms from inverter legs in electric powertrain traction inverters. IC Role / Device Role / Timing Role: Isolated analog front-end digitizer interfacing with isolated gate drivers and shunt amplifiers. Use Value: 44 mW/channel power and 1.8-V single supply reduce thermal load and simplify isolated power architecture. | Use Scenario: Acquiring ultrasonic transducer return signals in portable handheld NDT equipment for weld inspection. IC Role / Device Role / Timing Role: Low-noise, high-SFDR ADC converting piezoelectric sensor outputs for FFT-based defect analysis. Use Value: 90 dBc SFDR at 10 MHz suppresses spurious artifacts that could mask micro-crack signatures in spectral domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel, 12-bit, automotive ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC34J22IRGZTQ1 | Higher 50-MSPS sampling rate; identical 12-bit resolution, LVDS interface, and AEC-Q100 Grade 1 rating. | Targets wider IF bandwidths (e.g., 77-GHz radar with 2-GHz IF) where 25-MSPS is insufficient. | Select ADC34J22IRGZTQ1 when Nyquist zone >12.5 MHz is required; retains same pinout and register map for drop-in upgrade path. |
| ADS52J90IRGCTQ1 | 10-bit resolution, 65-MSPS, JESD204B interface; lower power (32 mW/ch), no internal dither/chopper. | Optimized for cost-sensitive, high-throughput applications where ENOB >10 bits is acceptable (e.g., basic proximity sensing). | Choose ADS52J90IRGCTQ1 for higher sampling throughput and lower BOM cost where 12-bit linearity is not mandatory. |
Compared with ADC34J22IRGZTQ1 and ADS52J90IRGCTQ1, the ADC3421QRWETQ1 delivers optimal balance of 12-bit precision, 25-MSPS throughput, and ultra-low power - making it ideal for thermally constrained, medium-bandwidth automotive sensing where SNR and channel isolation are prioritized over raw speed or cost.
Availability
ADC3421QRWETQ1 is available at Aetrix Electronics and suitable for solid-state LiDAR, radar signal acquisition, and motor control feedback requiring stable component supply across automotive production lifecycles.
Supply support for ADC3421QRWETQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade ICs with decades of automotive qualification expertise.
The ADC3421QRWETQ1 belongs to TI's high-performance, low-power automotive ADC portfolio designed specifically for demanding signal acquisition in ADAS, electrification, and vehicle autonomy systems.
FAQ
What is the maximum input frequency supported by the ADC3421QRWETQ1?
The ADC3421QRWETQ1 supports analog input frequencies up to 540 MHz (3-dB bandwidth) with 2-VPP differential full-scale input. At 25 MSPS sampling, its Nyquist zone extends to 12.5 MHz, but aliasing-tolerant wideband operation enables digitization of IF signals up to 230 MHz with appropriate anti-alias filtering - confirmed in Section 6.5 of the SBAS958A datasheet.
Does the ADC3421QRWETQ1 support JESD204B interface?
No, the ADC3421QRWETQ1 does not support JESD204B. It uses a proprietary 2-wire serial LVDS interface with separate frame and bit clocks (FCLKP/FCLKM, DCLKP/DCLKM). While it provides multichip synchronization via SYSREF, it lacks JESD204B link layer, lane alignment, or subclass 1 timing - making it incompatible with FPGA JESD204B receivers without custom deserialization logic.
What is the power consumption of the ADC3421QRWETQ1 in global power-down mode?
In global power-down mode, the ADC3421QRWETQ1 consumes 5–17 mW total (not per channel), as specified in Section 6.5 Electrical Characteristics: General. This state disables all four ADC cores and LVDS serializers, retaining only minimal bias circuitry - enabling ultra-low quiescent current during vehicle sleep modes while allowing wake-up in under 450 µs.
How is multichip synchronization implemented on the ADC3421QRWETQ1?
Multichip synchronization on the ADC3421QRWETQ1 is implemented via the differential SYSREFP/SYSREFM inputs, which align internal sampling clocks and LVDS frame boundaries across multiple devices. When driven synchronously with a common SYSREF pulse, all ADC3421QRWETQ1 units achieve deterministic latency matching within ±150 ps - verified in Section 6.8 Timing Requirements and Application Report SLYY183.
Can the ADC3421QRWETQ1 operate with a 3.3-V digital interface?
Yes, the SPI digital interface pins (SEN, SCLK, SDATA, SDOUT, RESET, PDN) of the ADC3421QRWETQ1 support both 1.8-V and 3.3-V CMOS logic levels, as explicitly stated in Section 6.7 Digital Characteristics. However, AVDD and DVDD supplies must remain at 1.8 V ±0.1 V; only the logic voltage thresholds are compatible - not the I/O voltage tolerance.
AD3421QRWETQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 25M
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 4
- Architecture:
- Pipelined
- Reference Type:
- External
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 56-VQFNP (8x8)
- Mounting Type:
- Surface Mount, Wettable Flank
- Grade:
- Automotive
- Qualification:
- AEC-Q100
AD3421QRWETQ1 FAQ
1.How can I place an order for AD3421QRWETQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD3421QRWETQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD3421QRWETQ1 reliable?
The price and inventory of AD3421QRWETQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD3421QRWETQ1 is usually 5 days.
3.What payment methods are accepted for AD3421QRWETQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD3421QRWETQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD3421QRWETQ1?
AD3421QRWETQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD3421QRWETQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD3421QRWETQ1?
For technical support, including AD3421QRWETQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD3421QRWETQ1 requirements.
6.How does Aetrix verify that AD3421QRWETQ1 is sourced from the original manufacturer or authorized distributors?
All AD3421QRWETQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD3421QRWETQ1 meets industry standards.
7.What is the process for return or replacement of AD3421QRWETQ1?
All AD3421QRWETQ1 units undergo pre-shipment inspection (PSI). If there is an issue with AD3421QRWETQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD3421QRWETQ1 part is unused and in its original packaging.
Return procedure for AD3421QRWETQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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