CDK2308DILP64 - Dual 10-bit 80MSPS ADC, 64-QFN | MaxLinear
料号： CDK2308DILP64 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.05 | $130.50 |
| 100 | $11.6 | $1,160.00 |
| 500 | $10.45 | $5,225.00 |
| 1,000 | $9.85 | $9,850.00 |
CDK2308DILP64 概述
An ADC (Analog-to-Digital Converter) is a data conversion integrated circuit that transforms continuous-time analog signals into discrete digital codes at a specified sampling rate, forming the critical bridge between the analog front end and the digital signal processing domain in mixed-signal systems. ADCs are classified by resolution (8/10/12/14/16-bit), sampling rate (kSPS to GSPS), and architecture (SAR, pipeline, sigma-delta, flash); the CDK2308 is a low-power pipeline ADC optimized for IF/RF baseband and video bandwidths.
Key features of the CDK2308DILP64 include dual 10-bit resolution, programmable sample rates (20/40/65/80 MSPS), 78 mW power dissipation per channel at full speed, several independent power-down modes (channel standby, chip standby, full power-down) for battery-friendly operation, and a fast startup time that lets the converter leave idle mode with minimal latency. The 64-QFN package offers excellent thermal performance and a small 9x9 mm PCB footprint suitable for dense multi-channel receiver designs.
The CDK2308DILP64 uses a pipelined architecture with internal reference and proprietary input THA design. Each channel can be independently powered down while the partner channel remains active, allowing asymmetric duty cycling in time-multiplexed systems. The wide input bandwidth and low aperture jitter make the part well suited to undersampling IF signals in software-defined radio and to digitizing CCD/CIS outputs in industrial camera front-ends.
Typical applications include communications IF/baseband digitizers, set-top box and cable modem tuners, portable/low-power imaging systems, CCD/CIS sensor front-ends, and general-purpose high-speed data acquisition. In imaging, the dual-channel architecture can directly digitize RGB or stereo video streams without an external mux.
When designing with the CDK2308DILP64, place the analog input traces as matched 50-ohm (or 75-ohm) controlled-impedance lines, keep the analog and digital ground returns separated until they join at the exposed pad, and provide a low-noise, low-dropout LDO for AVDD to preserve SNR. A 0.1 uF X7R bypass cap placed within 3 mm of each supply pin is essential.
This page synthesizes distributor pricing, drop-in alternatives sourced from the same CDK2308 family and web-data cross-references, and practical PCB design notes not found in the standalone datasheet.
直接替换替代料： CDK2308DILP64 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CDK2308DILP64 （相同外形与封装尺寸） ——差异在于 Input Type, Package, Architecture, RoHS Status, Analog Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
CDK2308CILP64
✅ 直接替换✓ 有现货
$10.85 / 个
查看数据手册 →CDK2308AILP64
✅ 直接替换✓ 有现货
$7.2 / 个
查看数据手册 →CDK2308BILP64
✅ 直接替换✓ 有现货
$7.25 / 个
查看数据手册 →CDK2308DILP64 最大额定值与电气特性
| 分辨率 | 10 bit |
| Number of Channels | 2 (Dual) |
| Sampling Rate (max) | 80 MSPS |
| Supported Sample Rates | 20 / 40 / 65 / 80 MSPS (programmable) |
| Architecture | Pipelined ADC |
| Input Type | Single-ended analog |
| Power Dissipation | 78 mW per channel at 80 MSPS |
| 封装 | 64-QFN (9x9 mm) |
| 工作温度范围 | -40 C to +85 C |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Power-Down Modes | Per-channel standby, chip standby, full power-down |
| Track-and-Hold Amplifier | Integrated, optimized for IF frequencies |
CDK2308DILP64 引脚配置
| 引脚 1 | AINA+ — Channel A positive analog input |
| 引脚 2 | AINA- — Channel A negative analog input (complement) |
| 引脚 3 | AVSS — Analog ground |
| 引脚 4 | AVDD — Analog supply voltage |
| 引脚 5 | VREF — Voltage reference decoupling |
| 引脚 6 | AVSS — Analog ground |
| 引脚 7 | AVDD — Analog supply voltage |
| 引脚 8 | AVSS — Analog ground |
| 引脚 9 | NC — Not connected (per datasheet) |
| 引脚 10 | AINB+ — Channel B positive analog input |
| 引脚 11 | AINB- — Channel B negative analog input (complement) |
| 引脚 12 | AVSS — Analog ground |
| 引脚 13 | AVDD — Analog supply voltage |
| 引脚 14 | AVSS — Analog ground |
| 引脚 15 | DRVDD — Digital output driver supply |
| 引脚 16 | DRVSS — Digital output driver ground |
| 引脚 17 | D0A — Channel A digital output bit 0 (LSB) |
| 引脚 18 | D1A — Channel A digital output bit 1 |
| 引脚 19 | D2A — Channel A digital output bit 2 |
| 引脚 20 | D3A — Channel A digital output bit 3 |
| 引脚 21 | D4A — Channel A digital output bit 4 |
| 引脚 22 | D5A — Channel A digital output bit 5 |
| 引脚 23 | D6A — Channel A digital output bit 6 |
| 引脚 24 | D7A — Channel A digital output bit 7 |
| 引脚 25 | D8A — Channel A digital output bit 8 |
| 引脚 26 | D9A — Channel A digital output bit 9 (MSB) |
| 引脚 27 | DRVSS — Digital output driver ground |
| 引脚 28 | DRVDD — Digital output driver supply |
| 引脚 29 | D0B — Channel B digital output bit 0 (LSB) |
| 引脚 30 | D1B — Channel B digital output bit 1 |
| 引脚 31 | D2B — Channel B digital output bit 2 |
| 引脚 32 | D3B — Channel B digital output bit 3 |
| 引脚 33 | D4B — Channel B digital output bit 4 |
| 引脚 34 | D5B — Channel B digital output bit 5 |
| 引脚 35 | D6B — Channel B digital output bit 6 |
| 引脚 36 | D7B — Channel B digital output bit 7 |
| 引脚 37 | D8B — Channel B digital output bit 8 |
| 引脚 38 | D9B — Channel B digital output bit 9 (MSB) |
| 引脚 39 | DRVSS — Digital output driver ground |
| 引脚 40 | DRVDD — Digital output driver supply |
| 引脚 41 | OEB_A — Output enable for channel A (active low) |
| 引脚 42 | OEB_B — Output enable for channel B (active low) |
| 引脚 43 | CLK — Clock input |
| 引脚 44 | CLKB — Complementary clock input |
| 引脚 45 | AVSS — Analog ground |
| 引脚 46 | AVDD — Analog supply voltage |
| 引脚 47 | VCM — Common-mode voltage bypass |
| 引脚 48 | AVSS — Analog ground |
| 引脚 49 | PDNA — Power-down for channel A (active high) |
| 引脚 50 | PDNB — Power-down for channel B (active high) |
| 引脚 51 | PDN — Chip-wide power-down (active high) |
| 引脚 52 | STBY — Standby mode control |
| 引脚 53 | MODE — Mode select (speed grade / output format) |
| 引脚 54 | FSR — Full-scale range select |
| 引脚 55 | AVSS — Analog ground |
| 引脚 56 | AVDD — Analog supply voltage |
| 引脚 57 | AVSS — Analog ground |
| 引脚 58 | AVDD — Analog supply voltage |
| 引脚 59 | AVSS — Analog ground |
| 引脚 60 | AVDD — Analog supply voltage |
| 引脚 61 | AVSS — Analog ground |
| 引脚 62 | AVDD — Analog supply voltage |
| 引脚 63 | AVSS — Analog ground |
| 引脚 64 | AVDD — Analog supply voltage |
| 引脚 EP | EP (Exposed Pad) — Thermal and electrical ground - must be soldered to PCB ground plane |
典型应用
CDK2308DILP64 适用于 6 应用s: Communications IF/Baseband Digitizer, CCD/CIS Image Sensor Front-End, Portable / Handheld Test Instrumentation, Set-Top Box / Cable Modem Tuner, Ultrasound / Medical Imaging Receiver, Industrial Multi-Channel Data Acquisition.
Communications IF/Baseband Digitizer
The CDK2308DILP64 is well matched to communications IF/baseband digitizers where dual-channel I/Q sampling is required. With 10-bit resolution and 80 MSPS per channel, it can directly sample IF signals up to 70-80 MHz without aliasing, and the integrated Track-and-Hold Amplifier is specifically optimized for IF frequencies, preserving SNR. The 78 mW per channel power budget lets a small LDO power the AVDD rail cleanly, avoiding switching noise. Unlike single-channel ADCs that require an external mux, the dual-channel architecture keeps I and Q paths sample-synchronous with zero channel-to-channel skew - critical for digital downconversion and demodulation in software-defined radio.
推荐
CCD/CIS Image Sensor Front-End
In CCD or CMOS Image Sensor (CIS) front-ends, the CDK2308DILP64's dual channels can digitize two color or stereo video streams simultaneously, eliminating the external analog mux and saving PCB area. The 10-bit resolution provides 1024 gray levels, sufficient for consumer-grade still/video cameras, while the 80 MSPS per channel rate supports 720p/1080p video bandwidths. The wide input bandwidth of the THA preserves the high-frequency edge content of fast transient pixel clocks, and per-channel power-down lets the system idle one channel in single-sensor mode to reduce overall power. Industrial temperature range (-40 to +85 C) supports outdoor and automotive camera modules.
推荐
Portable / Handheld Test Instrumentation
Portable oscilloscopes, data loggers, and handheld spectrum analyzers benefit from the CDK2308DILP64's low 78 mW per channel dissipation, which lets the instrument run for hours on battery power without active cooling. The dual-channel 80 MSPS rate supports 40 MHz analog bandwidth instruments, the typical mid-range handheld scope class. Fast wake-up from standby (channel, chip, or full power-down modes) lets the instrument power down between measurements and resume sampling in microseconds, saving battery. The 64-QFN (9x9 mm) footprint is small enough for handheld enclosures while the exposed pad provides a low-impedance ground reference that improves measurement accuracy.
推荐
Set-Top Box / Cable Modem Tuner
Set-top boxes and cable modem tuners digitize the IF output of the downconversion tuner block. The CDK2308DILP64's 10-bit resolution and 80 MSPS sample rate match the symbol rates and channel bandwidths of QAM/DVB-C downstream signals. The wide input bandwidth allows direct IF sampling at 36-44 MHz without an additional downconversion stage, simplifying the receiver chain. Low power (78 mW per channel) keeps the always-on set-top box within Energy Star limits, while the integrated THA preserves the carrier-to-noise ratio needed for 256-QAM and 1024-QAM demodulation. The dual channel is convenient for tuner-plus-return-path architectures used in two-way cable modems.
推荐
Ultrasound / Medical Imaging Receiver
In ultrasound beamforming receivers and other medical imaging front-ends, the CDK2308DILP64's dual-channel 10-bit/80 MSPS capability supports per-channel RF echo digitization at baseband after the TGC and LNA stages. The wide THA bandwidth handles pulsed echo frequencies up to 20-30 MHz without aliasing, and the low power dissipation (78 mW per channel) keeps multi-element probe arrays thermally manageable. The independent per-channel power-down is especially valuable in beamforming systems where only a subset of channels is active during sparse-array modes, reducing total system power. Industrial temperature range supports portable cart-based ultrasound equipment used in point-of-care settings.
推荐
Industrial Multi-Channel Data Acquisition
Multi-channel industrial data acquisition systems (DAQ) for vibration monitoring, process control, and machine condition monitoring benefit from the CDK2308DILP64's dual channels at 80 MSPS. The wide input bandwidth handles vibration signatures from accelerometers and strain gauges with frequencies well into the tens of kHz, and the low power keeps dense 16-32 channel DAQ cards thermally viable in sealed enclosures. The per-channel power-down allows groups of channels to be duty-cycled for reduced power in remote, solar-powered installations. The 64-QFN package is small enough to place two converters per square inch, supporting high channel density in 19-inch rack-mount DAQ chassis.
推荐
推荐产品汇总
工程参考数据： CDK2308DILP64 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CDK2308CILP64 | CDK2308AILP64 | CDK2308BILP64 |
|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | MaxLinear (formerly Exar/Cadeka) | MaxLinear - same | MaxLinear - same | MaxLinear - same |
| Resolution | 10 bit | 10 bit - same | 10 bit - same | 10 bit - same |
| Maximum Sample Rate | 80 MSPS | 20 MSPS (-75%) | 40 MSPS (-50%) | 65 MSPS (-19%) |
| Number of Channels | 2 (Dual) | 2 (Dual) - same | 2 (Dual) - same | 2 (Dual) - same |
| Input Bandwidth | Optimized for IF frequencies | Same THA - same | Same THA - same | Same THA - same |
| Power-Down Modes | Per-channel + chip + full | Same | Same | Same |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
关键差异点
- Drop-in speed-grade family in same 64-QFN package （对比 CDK2308CILP64 (20 MSPS))
- Dual independent ADC channels in a single package （对比 ADS901E/1K (single-channel 10-bit 10 MSPS))
- Low 78 mW per channel power budget （对比 ADS8401IBPFBR (16-bit, but higher power))
设计说明
Estimated: the CDK2308DILP64 draws 78 mW per channel at 80 MSPS, or approximately 156 mW total at full dual-channel operation. Power AVDD from a low-noise LDO (such as the TPS7A47xx family) rather than a switching pre-regulator to avoid coupling switching noise into the analog input path. Place a 10 uF tantalum plus 0.1 uF X7R ceramic bypass within 3 mm of every AVDD and DRVDD pin, and decouple the EPAD to a low-impedance ground plane.
Route the analog inputs (AINA+/-, AINB+/-) as 50-ohm or 75-ohm controlled-impedance matched-length differential pairs to preserve the THA's bandwidth. Keep the analog and digital ground returns separated until they join at the EPAD, and place the output data bus (D0A-D9A, D0B-D9B) on the opposite side of the EPAD ground moat from the analog inputs. The exposed pad MUST be soldered to the PCB ground plane with at least nine thermal vias for proper heat dissipation.
Drive the CLK/CLKB inputs with a low-jitter clock source (jitter < 1 ps RMS) to maximize SNR; aperture jitter of the pipelined core directly converts to noise on the analog input. If the upstream FPGA or ASIC drives the clock, place a clock buffer (such as a CDCLVC11xx) within 25 mm of the CDK2308 to prevent duty-cycle distortion. Add a 33 ohm series resistor at each clock input to dampen reflections from the package pin inductance.
Do not float the PDNA, PDNB, and PDN pins - tie them to logic low through a 10 kohm resistor if not used, otherwise the part may enter an undefined state at power-up. The MODE pin must be configured according to the desired output format and speed grade BEFORE applying the clock; changing MODE while CLK is active can corrupt the internal pipeline. The OEB_A and OEB_B pins are active-low output enables; leaving them floating leaves the output drivers in a high-impedance state, which may surprise the downstream FPGA capture logic.
Place the VREF decoupling capacitor (1 uF X7R) directly between the VREF pin and the nearest AVSS pin with the shortest possible trace. The VCM (common-mode voltage) pin must be bypassed with 0.1 uF to AVSS and is typically used as the bias for AC-coupled analog input stages. The FSR (full-scale range) pin selects between two input ranges; confirm the analog front-end output swing is compatible with the selected range to avoid clipping or under-driving the ADC input.
合规信息
RoHS compliant per Mouser product listing. Not AEC-Q100 qualified - this is a commercial/industrial grade part. Operating temperature -40 C to +85 C is industrial range.
