CDK2308AILP64 - Dual 10-bit 20MSPS ADC | Exar | QFN-64
MPN: CDK2308AILP64 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.85 | $985.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.2 | $7,200.00 |
CDK2308AILP64 Overview
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous-time analog voltages into discrete digital codes, enabling downstream digital signal processing, storage, or transmission. The CDK2308 belongs to the pipelined-architecture ADC family, which balances high sampling speed with moderate resolution (10-bit), making it a workhorse part for video broadcast equipment, IF sampling in communications receivers, and industrial machine-vision front ends. In the broader taxonomy: ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features of the CDK2308AILP64 include a maximum sample rate of 80 MSPS (the ILP64 grade supports 20 MSPS operation per the suffix code), 10-bit resolution, dual simultaneous-sampling channels, CMOS/TTL-compatible digital outputs, internal bandgap reference, and an integrated input buffer. The wide input bandwidth allows direct IF sampling in communication designs and pixel-rate capture in camera link systems.
The device's pipelined architecture stages multiple low-resolution flash sub-ADCs to achieve a 10-bit result per sample while maintaining throughput above tens of MSPS. Internal calibration and error correction suppress inter-stage residue errors to deliver integral non-linearity (INL) and DNL within +/-1 LSB typical, supporting broadcast-quality video and broadband IF signal chains where linearity directly drives system signal-to-noise ratio.
Typical applications include HD/SD video digitization, professional camera front ends, communications IF/baseband sampling, industrial test and measurement instrumentation, medical imaging (ultrasound beamformers), and defense signal-intelligence receivers. The dual-channel architecture is particularly attractive for I/Q demodulation, dual-polarity analog front ends, and stereo or RGB video capture where channel-to-channel matching is critical.
When designing with the CDK2308AILP64, ensure the analog and digital supplies are well-decoupled with separate ferrite beads and bulk capacitors, and route the analog inputs as 50-ohm controlled-impedance differential pairs to the IC. The exposed thermal pad (EP) must be soldered to a continuous ground plane to dissipate ~0.5 W of internal power and minimize thermal resistance.
This page synthesizes real-time distributor pricing, drop-in alternative parts, and engineering design notes that complement the Exar datasheet content.
Drop-in alternatives for CDK2308AILP64 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CDK2308AILP64 (same form factor and footprint) — differing in Package, Input Type, Architecture, Resolution, Manufacturer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CDK2308BILP64
✅ Drop-In✓ In Stock
$7.25 / Unit
View Datasheet →CDK2308CILP64
✅ Drop-In✓ In Stock
$10.85 / Unit
View Datasheet →CDK2308DILP64
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →ADS901E/1K
✅ Drop-In✓ In Stock
$2.59 / Unit
View Datasheet →ADS901E/1KG4
✅ Drop-In✓ In Stock
$4.12 / Unit
View Datasheet →CDK1307CILP40
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →CDK2308AILP64 Maximum Ratings & Electrical Characteristics
| Manufacturer | Exar (MaxLinear) |
| Part Number | CDK2308AILP64 |
| Resolution | 10 bit |
| Number of Channels | 2 (Dual) |
| Sampling Rate (Grade ILP64) | 20 MSPS |
| Family Maximum Sampling Rate | 80 MSPS (per family datasheet) |
| Architecture | Pipelined |
| Input Type | Differential / Single-ended analog |
| Analog Supply Voltage | +3.3 V |
| Digital Supply Voltage | +3.3 V |
| Data Interface | Parallel CMOS / TTL |
| Package | 64-pin QFN (LP) 9x9 mm with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +85C (industrial) |
| Internal Reference | Yes (bandgap) |
| RoHS Status | Compliant (per distributor listings) |
CDK2308AILP64 64-pin qfn (lp) 9x9 mm with exposed pad Pin Configuration Guide
Pin configuration for CDK2308AILP64 (64-pin qfn (lp) 9x9 mm with exposed pad package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for CDK2308AILP64.
Refer to the datasheet for full pin configuration.
Typical Applications
CDK2308AILP64 is suitable for 6 applications: HD/SD Video Digitization, Communications IF Sampling, Industrial Machine Vision, Medical Ultrasound Beamforming, Test and Measurement Instrumentation, Defense Signal-Intelligence Receivers.
HD/SD Video Digitization
The CDK2308AILP64 fits HD/SD video digitization because its dual 10-bit channels simultaneously sample component video (Y/C or RGB) at up to 20 MSPS, providing full-bandwidth capture of SMPTE-259M or SMPTE-292M streams. The 10-bit resolution exceeds the 8-bit minimum for broadcast video, leaving headroom for chroma keying and color grading downstream. Place the IC close to the analog video front end with controlled-impedance differential traces, and route the parallel digital outputs into a video processor FPGA. Power consumption stays below 0.5 W per channel at full rate, simplifying thermal design in compact broadcast cards.
Recommended
Communications IF Sampling
In communications receivers, the CDK2308AILP64's dual channels and 20 MSPS sample rate enable direct IF sampling of intermediate-frequency signals at baseband or low-IF. The pipelined architecture rejects out-of-band interferers, while the internal bandgap reference minimizes temperature drift across field deployments. Route the analog inputs as 50-ohm differential pairs with balun coupling for maximum spurious-free dynamic range. The CMOS digital outputs interface directly to a baseband DSP or FPGA for demodulation, channelization, or spectrum analysis. Industrial temperature grade (-40C to +85C) supports outdoor base-station and military radio platforms.
Recommended
Industrial Machine Vision
The CDK2308AILP64 is well-suited for industrial machine-vision cameras because its dual channels simultaneously digitize two sensor taps (left/right, odd/even, or RGB sub-channels) with matched gain and offset. The 20 MSPS rate supports pixel rates above 10 MHz per channel when used with deserialization, accommodating multi-megapixel line-scan and area-scan imagers. The exposed thermal pad of the QFN-64 package efficiently dissipates heat in sealed camera enclosures. Industrial-grade temperature rating (-40C to +85C) allows deployment in factory automation cells without additional thermal conditioning. The CMOS outputs interface directly to image signal processors (ISPs).
Recommended
Medical Ultrasound Beamforming
Medical ultrasound beamforming systems use the CDK2308AILP64 to digitize analog echo channels at sample rates supporting real-time imaging up to 20 MSPS. The dual simultaneous-sampling channels minimize skew between adjacent transducer elements, which is critical for accurate beam steering and focus. The internal bandgap reference maintains channel-to-channel matching across arrays of 64+ elements. Low power consumption simplifies thermal management in handheld ultrasound probes and bedside cart systems. The QFN-64 footprint supports dense PCB layouts for high-channel-count systems where multiple ADCs are tiled in parallel.
Recommended
Test and Measurement Instrumentation
Test and measurement instruments (oscilloscopes, spectrum analyzers, transient recorders) benefit from the CDK2308AILP64's dual 10-bit 20 MSPS channels for high-density waveform capture. The pipelined architecture provides low-latency conversion suitable for triggered acquisition systems. The CMOS digital outputs feed directly into FPGA-based acquisition memory banks with minimal glue logic. Differential analog inputs reject common-mode noise from bench-top environments. The internal reference eliminates the need for external precision references, simplifying BOM and calibration cycles in production test systems. Industrial temperature grade supports outdoor and laboratory instrumentation.
Recommended
Defense Signal-Intelligence Receivers
Defense signal-intelligence (SIGINT) and electronic-warfare (EW) receivers use the CDK2308AILP64's dual channels to capture wideband signals at 20 MSPS per channel for spectrogram analysis and direction finding. The simultaneous sampling preserves phase relationships between antenna pairs, enabling accurate angle-of-arrival calculations. Industrial and military temperature ranges allow deployment in rugged field environments. The pipelined architecture delivers low latency for time-sensitive COMINT/ELINT processing. Differential inputs suppress common-mode interference from RF-dense platforms. The QFN-64 exposed pad enables ground-plane cooling for sustained operation in vehicle-mounted and airborne platforms.
Recommended
Recommended Products Summary
Engineering reference data for CDK2308AILP64 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CDK2308BILP64 | CDK2308CILP64 | CDK2308DILP64 | ADS901E/1K |
|---|---|---|---|---|---|
| Package | QFN-64 (LP) 9x9 mm | QFN-64 (LP) 9x9 mm - same | QFN-64 (LP) 9x9 mm - same | QFN-64 (LP) 9x9 mm - same | QFN-64 (LP) 9x9 mm - same (per Site MPN list) |
| Brand | MaxLinear (formerly Exar) | MaxLinear - same brand | MaxLinear - same brand | MaxLinear - same brand | Texas Instruments - cross brand |
| Sampling Rate | 20 MSPS (Grade A) | 40 MSPS | 65 MSPS | 80 MSPS | 20 MSPS |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Channels | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 1 (Single) |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Analog Supply | +3.3 V | +3.3 V | +3.3 V | +3.3 V | +3.3 V (typical) |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Dual simultaneous-sampling channels (vs ADS901E/1K)
- In-family speed scalability without PCB redesign (vs CDK2308DILP64 (80 MSPS sibling))
- Industry-standard QFN-64 footprint (vs BGA-packaged dual ADCs from competitors)
Design Notes
The CDK2308AILP64 requires separate AVDD (+3.3 V analog) and DVDD (+3.3 V digital) rails. Connect ferrite beads between the rails at the IC to isolate digital switching noise from the sensitive analog front end. Place 10 uF bulk tantalum and 0.1 uF ceramic decoupling capacitors within 5 mm of each supply pin. The exposed thermal pad (EP) on the bottom of the QFN-64 package must be soldered to a continuous ground plane to dissipate internal power and minimize thermal resistance.
Route analog input traces as 50-ohm controlled-impedance differential pairs (100 ohms differential) to maximize spurious-free dynamic range and reject common-mode noise. Use differential baluns or transformers to drive the ADC inputs from single-ended sources. Keep the analog input traces away from the parallel digital output bus; use an inner-layer analog ground plane separated from the digital ground by a single stitching ground tie-in at the ADC EP. The sample clock trace must be routed with controlled impedance and matched length to both channels to minimize channel-to-channel skew.
Estimated: the parallel CMOS digital outputs can generate 100-200 mV of switching noise on adjacent traces if not properly terminated. Place 33-ohm series damping resistors close to the ADC outputs to dampen transmission-line ringing. The digital output bus should be routed on an inner signal layer sandwiched between ground planes to minimize radiated emissions. When interfacing to an FPGA, enable the FPGA's internal series termination or add external resistors to match the 50-ohm characteristic impedance of the PCB traces.
Do not exceed the absolute maximum analog input voltage (typically AVDD + 0.3 V) or apply signals before the AVDD supply has stabilized - the internal ESD diodes will forward-conduct and damage the device. The internal bandgap reference requires a quiet supply; avoid placing the reference decoupling capacitor near switching DC-DC converters. Sample clock jitter directly degrades SNR; use a low-jitter clock source (jitter <5 ps RMS) for high-performance applications. Failure to solder the exposed pad results in poor thermal performance and unreliable operation at elevated ambient temperatures.
Compliance Information
RoHS compliant per distributor listings. The CDK2308AILP64 is not AEC-Q100 qualified; it is targeted at industrial, communications, and instrumentation applications rather than automotive. Lead-free packaging is standard. REACH, halogen-free status, and conflict-minerals compliance should be confirmed with MaxLinear for specific applications.
