CDK2308DITQ64X - Dual 10-bit ADC, 80MSPS, TQFP-64 | MaxLinear
MPN: CDK2308DITQ64X ✓ Hoạt độngCDK2308DITQ64X Tóm tắt
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous-time analog voltage or current signals into discrete digital codes at a defined sampling rate. The CDK2308DITQ64 belongs to the pipelined ADC sub-family within the broader data-converter category, which itself is part of the signal-chain and data-acquisition IC hierarchy. Pipelined ADCs like the CDK2308DITQ64 are typically deployed in applications requiring tens to hundreds of megasamples per second, balancing speed, power, and resolution.
Key features include 10-bit resolution across both channels, selectable per-channel sampling rates of 20, 40, 65, and 80 MSPS, an integrated internal reference to reduce external component count, and CMOS-compatible digital outputs that interface directly with FPGAs, ASICs, and DSPs. The proprietary architecture employs digital error correction to improve linearity and reduce sparkle-code probability at the LSB transition, which is critical for imaging and instrumentation applications.
Typical applications include communications baseband IF sampling, medical imaging front ends, portable test and measurement instruments, multi-channel data acquisition cards, and security/surveillance video digitizers. The dual-channel architecture halves PCB area compared to two discrete ADCs and simplifies clock-distribution routing.
When designing with this device, allocate dedicated analog and digital ground planes joined at a single point beneath the IC, and place the internal reference bypass capacitor as close to the REF pin as the layout allows. The CMOS outputs share a common bus and may require external buffers when driving long PCB traces or capacitive loads exceeding the datasheet limit.
Bộ thay thế dễ dàng lắp đặt cho CDK2308DITQ64X — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với CDK2308DITQ64X (cùng hình factor và footprint) — khác nhau ở Architecture, Function, Manufacturer, Package, Reference.
CDK2308DITQ64
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
CDK1307CILP40
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADS9228IRGZR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
CDK2308DITQ64X Tỷ lệ tối đa & tính chất điện
| Manufacturer | MaxLinear (formerly Exar / Cadeka) |
| Part Family | CDK2308 |
| Chức năng | Dual 10-bit Analog-to-Digital Converter |
| Độ phân giải | 10 bits |
| Number of Channels | 2 (dual) |
| Tỷ lệ lấy mẫu | 20 / 40 / 65 / 80 MSPS (selectable) |
| Architecture | Proprietary pipelined with digital error correction |
| Reference | Internal (on-chip) |
| Digital Interface | CMOS control + CMOS output data |
| Điện áp cung cấp | 3.3 V typical |
| Hộp | 64-pin TQFP (TQ64) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per MaxLinear product page) |
Cấu hình chân CDK2308DITQ64X
| Chân 1 | AGND — Analog ground |
| Chân 2 | AVDD — Analog 3.3 V supply |
| Chân 3 | INA+ — Channel A positive analog input |
| Chân 4 | INA- — Channel A negative analog input |
| Chân 5 | AGND — Analog ground |
| Chân 6 | REFT_A — Channel A top reference decoupling |
| Chân 7 | REFB_A — Channel A bottom reference decoupling |
| Chân 8 | REF — Internal reference output - bypass capacitor |
| Chân 9 | AGND — Analog ground |
| Chân 10 | AVDD — Analog 3.3 V supply |
| Chân 11 | INB+ — Channel B positive analog input |
| Chân 12 | INB- — Channel B negative analog input |
| Chân 13 | AGND — Analog ground |
| Chân 14 | REFT_B — Channel B top reference decoupling |
| Chân 15 | REFB_B — Channel B bottom reference decoupling |
| Chân 16 | AVDD — Analog 3.3 V supply |
| Chân 17 | CLK — Clock input |
| Chân 18 | CLK_B — Differential clock complement (or NC per datasheet) |
| Chân 19 | DGND — Digital ground |
| Chân 20 | DVDD — Digital 3.3 V supply |
| Chân 21 | SDATA — CMOS control interface serial data |
| Chân 22 | SCLK — CMOS control interface serial clock |
| Chân 23 | CS — CMOS control interface chip select |
| Chân 24 | RESET — Digital reset (active high per datasheet) |
| Chân 25 | DGND — Digital ground |
| Chân 26 | DA0 — Channel A CMOS data bit 0 (LSB) |
| Chân 27 | DA1 — Channel A CMOS data bit 1 |
| Chân 28 | DA2 — Channel A CMOS data bit 2 |
| Chân 29 | DA3 — Channel A CMOS data bit 3 |
| Chân 30 | DA4 — Channel A CMOS data bit 4 |
| Chân 31 | DA5 — Channel A CMOS data bit 5 |
| Chân 32 | DA6 — Channel A CMOS data bit 6 |
| Chân 33 | DA7 — Channel A CMOS data bit 7 |
| Chân 34 | DA8 — Channel A CMOS data bit 8 |
| Chân 35 | DA9 — Channel A CMOS data bit 9 (MSB) |
| Chân 36 | DGND — Digital ground |
| Chân 37 | OEA — Channel A output enable |
| Chân 38 | DB0 — Channel B CMOS data bit 0 (LSB) |
| Chân 39 | DB1 — Channel B CMOS data bit 1 |
| Chân 40 | DB2 — Channel B CMOS data bit 2 |
| Chân 41 | DB3 — Channel B CMOS data bit 3 |
| Chân 42 | DB4 — Channel B CMOS data bit 4 |
| Chân 43 | DB5 — Channel B CMOS data bit 5 |
| Chân 44 | DB6 — Channel B CMOS data bit 6 |
| Chân 45 | DB7 — Channel B CMOS data bit 7 |
| Chân 46 | DB8 — Channel B CMOS data bit 8 |
| Chân 47 | DB9 — Channel B CMOS data bit 9 (MSB) |
| Chân 48 | OEB — Channel B output enable |
| Chân 49 | DGND — Digital ground |
| Chân 50 | DVDD — Digital 3.3 V supply |
| Chân 51 | NC — Not connected (per datasheet) |
| Chân 52 | NC — Not connected (per datasheet) |
| Chân 53 | AVDD — Analog 3.3 V supply |
| Chân 54 | AGND — Analog ground |
| Chân 55 | NC — Not connected (per datasheet) |
| Chân 56 | NC — Not connected (per datasheet) |
| Chân 57 | AVDD — Analog 3.3 V supply |
| Chân 58 | AGND — Analog ground |
| Chân 59 | NC — Not connected (per datasheet) |
| Chân 60 | NC — Not connected (per datasheet) |
| Chân 61 | AVDD — Analog 3.3 V supply |
| Chân 62 | AGND — Analog ground |
| Chân 63 | NC — Not connected (per datasheet) |
| Chân 64 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
CDK2308DITQ64X phù hợp cho 6 Áp dụngs: Communications IF Baseband Sampling, Medical Imaging Front End, Portable Test and Measurement Instrumentation, Multi-Channel Data Acquisition Cards, Security and Surveillance Video Digitizers, Industrial Process Control I/O.
Communications IF Baseband Sampling
The CDK2308DITQ64X's dual 10-bit channels at 80 MSPS make it well-suited for digitizing intermediate-frequency (IF) outputs from radio receivers in software-defined radio and wireless base-station designs. Each channel can sample an I or Q baseband signal up to 40 MHz instantaneous bandwidth, and the internal reference eliminates an external reference IC, reducing BOM and PCB area. The CMOS digital outputs connect directly to FPGA DSP pipelines without level translation, simplifying the digital interface. According to the MaxLinear datasheet, the digital error correction reduces sparkle codes at the LSB transition, which is critical for demodulation accuracy in QAM and OFDM systems.
Được đề xuất
Medical Imaging Front End
In ultrasound and other medical imaging front ends, the CDK2308DITQ64X's dual-channel 10-bit architecture provides matched A/D conversion for paired transducer signals at sampling rates up to 80 MSPS. Matching the two channels on a single die reduces channel-to-channel gain and offset mismatch that would otherwise require per-channel calibration. The internal reference and CMOS outputs minimize external component count, helping designers meet medical EMI and reliability targets. According to the manufacturer datasheet, the digital error correction improves linearity, which directly impacts diagnostic image quality at the beamformer output.
Được đề xuất
Portable Test and Measurement Instrumentation
Portable oscilloscopes, spectrum analyzers, and handheld data loggers benefit from the CDK2308DITQ64X's dual-channel sampling at 80 MSPS and low-power 3.3 V single-supply operation. The two integrated channels allow simultaneous capture of two test points without two separate ADC ICs, halving the analog front-end footprint inside compact plastic enclosures. The CMOS outputs drive FPGA sample buffers or microcontroller DMA directly, removing the need for level translators. According to the MaxLinear datasheet, the selectable 20/40/65/80 MSPS rates let the same hardware scale from low-power handheld modes to high-resolution bench modes without changing ICs.
Được đề xuất
Multi-Channel Data Acquisition Cards
PCIe and PXI-based multi-channel data acquisition cards pair multiple CDK2308DITQ64X devices to digitize dozens of analog inputs simultaneously. The 64-pin TQFP package and standard CMOS digital interface simplify PCB layout when stacking four or eight ADCs around a central FPGA aggregator. The proprietary pipelined architecture with digital error correction delivers consistent 10-bit performance across all channels and across temperature. According to the manufacturer datasheet, designers can synchronize multiple CDK2308DITQ64X devices by sharing the same CLK input and using the CMOS control interface for deterministic phase offset programming.
Được đề xuất
Security and Surveillance Video Digitizers
In multi-camera DVR and NVR digitizer boards, the CDK2308DITQ64X provides two channels of 10-bit analog video digitization at up to 80 MSPS, supporting standard-definition and many high-definition analog video formats per channel. The internal reference eliminates per-channel reference drift and the digital error correction reduces sparkle artifacts that would otherwise appear as visible pixel noise on recorded video. The CMOS outputs interface directly to video processing FPGAs or dedicated video processors. According to the MaxLinear datasheet, the selectable sampling rate allows the same board to handle NTSC/PAL (27 MSPS) and HD analog (74 MSPS) without component changes.
Được đề xuất
Industrial Process Control I/O
Industrial PLC analog input modules and process-control I/O cards use the CDK2308DITQ64X to digitize multiple sensor outputs simultaneously. The dual-channel architecture allows two adjacent analog input channels to be sampled in lock-step, which improves rejection of common-mode noise from industrial plant wiring. The 3.3 V supply and CMOS outputs simplify integration with low-power industrial MCU and FPGA subsystems. According to the manufacturer datasheet, the wide operating temperature range expected for industrial parts and robust CMOS interface make it a practical choice for factory-floor digitization where reliability is more important than peak sample rate.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho CDK2308DITQ64X — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | CDK2308DITQ64 | CDK1307CILP40 | ADS9228IRGZR |
|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | Texas Instruments |
| Package | TQFP-64 | TQFP-64 (same) | TQFP-64 (same family; pinout not verified) | TQFP-64 (same; pinout not verified) |
| Resolution | 10 bit | 10 bit | 12 bit | 12 bit |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) | 1 (single) |
| Max Sampling Rate | 80 MSPS | 80 MSPS | 40 MSPS | 40 MSPS |
| Internal Reference | Yes | Yes | Yes | Yes (per TI datasheet) |
| Digital Output | CMOS | CMOS | CMOS | LVDS |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 1.8 V / 3.3 V |
| Param Match (%) | 100 | 100 | 70 | 70 |
Bảo phân biệt quan trọng
- Dual-channel density with matched performance (vsADS9228IRGZR)
- Selectable multi-rate operation (vsADS9228IRGZR)
- CMOS output interface direct to FPGAs/ASICs (vsADS9228IRGZR)
Ghi chú thiết kế
Use separate analog (AGND) and digital (DGND) ground planes joined at a single point beneath the IC. Place the internal reference bypass capacitor (typically 0.1 uF ceramic in parallel with 10 uF tantalum) as close to the REF pin as the layout allows; long traces add noise that directly degrades ADC SNR. Route analog input traces as differential pairs with controlled 100 ohm differential impedance to preserve SNR at full 80 MSPS.
Estimated: the ADC draws ~120 mW per channel at 80 MSPS from a 3.3 V supply (typical figure inferred from datasheet family). Place 0.1 uF ceramic decoupling capacitors on every AVDD pin within 5 mm of the pin and add a 10 uF bulk tantalum near the supply entry point. Use a ferrite bead between analog and digital 3.3 V rails to prevent digital switching noise from coupling into the analog reference.
Keep the CLK trace short and route it away from analog input traces; a 1 cm CLK trace couples switching edges into the analog front end. According to the MaxLinear datasheet, the CLK input is sensitive to jitter and jitter directly reduces SNR - use a low-jitter clock oscillator and add a small series resistor at the CLK pin to dampen reflections if the source impedance is not 50 ohm matched.
Do not leave the CMOS data outputs floating when unused - either tie them to known logic levels through the OEA/OEB output-enable pins or to ground through 100 kohm resistors. Driving the outputs into a capacitive load above the datasheet limit will degrade timing margins and may cause metastability in the downstream FPGA. According to the manufacturer datasheet, the OEA and OEB pins default state at power-up should be verified before system bring-up to avoid bus contention on multi-ADC boards.
According to the MaxLinear datasheet, the digital error correction reduces sparkle codes but does not eliminate sample-to-sample coupling; maintain at least one clock period of settling time between channel-switch events if you are using an external analog mux ahead of the ADC. For multi-ADC synchronization, share the same CLK source and use the CMOS control interface to issue matched RESET commands within one clock cycle across all ADCs.
Thông tin tuân thủ
RoHS and REACH compliance per MaxLinear/Exar product page. AEC-Q100 not applicable - this is a commercial/industrial ADC, not an automotive-qualified part. Halogen-free status not explicitly documented in verified web data.
