LTC2170CUKG-14 - 14-Bit, 25Msps Low Power Quad ADC | ADI
料号： LTC2170CUKG-14 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $53.17 | $53.17 |
| 10 | $47.85 | $478.50 |
| 100 | $39.62 | $3,962.00 |
| 500 | $31.94 | $15,970.00 |
| 1,000 | $27.18 | $27,180.00 |
LTC2170CUKG-14 概述
A pipelined ADC is a high-speed converter architecture that resolves an analog input through a cascade of low-resolution stages with inter-stage digital error correction. Quad-channel ADCs like the LTC2170-14 family fall under the broader data-converter hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. By sharing one clock, reference and digital interface across four channels, designers replace four discrete ADC ICs, reducing BOM count, board area, and channel-to-channel skew compared to discrete multi-ADC solutions.
Key specifications include 14-bit resolution at 25 Msps per channel, 90 dB spurious-free dynamic range (SFDR), single 1.8 V supply operation, and total power dissipation of 162 mW (about 41 mW per channel). Each channel has 800 MHz full-power analogue bandwidth, selectable 1 Vp-p or 2 Vp-p input ranges, an integrated sample-and-hold, plus shutdown and nap modes controlled through the serial SPI configuration port. The 52-pin QFN package offers low thermal resistance via the bottom exposed pad for heat transfer into the PCB copper plane.
Typical applications include portable ultrasound imaging, multi-channel communication receivers, low-power instrumentation, and industrial imaging arrays. The pin-compatible 12-bit and 14-bit family members (LTC2170-12 / LTC2170-14) share the same footprint, allowing system designers to upgrade resolution or sample rate by simply substituting parts on an existing layout.
直接替换替代料： LTC2170CUKG-14 ——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： LTC2170CUKG-14 （相同外形与封装尺寸） ——差异在于 Package, Resolution, Digital Output Interface, Number of Channels, Power per Channel.
快速对比工具——选择替代料号进行并排对比：
LTC2170IUKG-14#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2171CUKG-14#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2172CUKG-14#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2170CUKG-12#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2151CUJ-14
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$29.1 / 个
查看数据手册 →LTC2170CUKG-14 最大额定值与电气特性
| 分辨率 | 14 bit |
| Number of Channels | 4 (Quad) |
| Sample Rate per Channel | 25 Msps |
| Architecture | Pipelined |
| SFDR | 90 dB |
| 电源电压 | 1.8 V (single) |
| Total Power Dissipation | 162 mW (all 4 channels active) |
| Power per Channel | 41 mW |
| Full-Power Input Bandwidth | 800 MHz |
| Selectable Input Ranges | 1 Vp-p / 2 Vp-p |
| Digital Output | Serial LVDS (1 or 2 bits per channel) |
| Configuration Interface | Serial SPI |
| Power-Saving Modes | Shutdown, Nap |
| 封装 | 52-QFN (7 mm x 8 mm) with exposed pad |
LTC2170CUKG-14 引脚配置
| 引脚 1 | GND — Ground |
| 引脚 2 | AINA+ — Channel A positive analog input |
| 引脚 3 | AINA- — Channel A negative analog input |
| 引脚 4 | AINB+ — Channel B positive analog input |
| 引脚 5 | AINB- — Channel B negative analog input |
| 引脚 6 | AINC+ — Channel C positive analog input |
| 引脚 7 | AINC- — Channel C negative analog input |
| 引脚 8 | AIND+ — Channel D positive analog input |
| 引脚 9 | AIND- — Channel D negative analog input |
| 引脚 10 | VCM — Common-mode voltage output |
| 引脚 11 | REFT — Top reference decoupling |
| 引脚 12 | REFB — Bottom reference decoupling |
| 引脚 13 | GND — Ground |
| 引脚 14 | OGND — Output driver ground |
| 引脚 15 | OVDD — Output driver supply |
| 引脚 16 | CLK+ — Clock input positive |
| 引脚 17 | CLK- — Clock input negative |
| 引脚 18 | CS — SPI chip select (active low) |
| 引脚 19 | SCK — SPI serial clock |
| 引脚 20 | SDI — SPI serial data in |
| 引脚 21 | SDO — SPI serial data out |
| 引脚 22 | SHDN — Shutdown pin (active low) |
| 引脚 23 | NAP — Nap mode pin |
| 引脚 24 | MODE — Output mode select (1- or 2-bit/channel LVDS) |
| 引脚 25 | OUTA+ — Channel A LVDS output positive |
| 引脚 26 | OUTA- — Channel A LVDS output negative |
| 引脚 27 | OUTB+ — Channel B LVDS output positive |
| 引脚 28 | OUTB- — Channel B LVDS output negative |
| 引脚 29 | OUTC+ — Channel C LVDS output positive |
| 引脚 30 | OUTC- — Channel C LVDS output negative |
| 引脚 31 | OUTD+ — Channel D LVDS output positive |
| 引脚 32 | OUTD- — Channel D LVDS output negative |
| 引脚 33 | OGND — Output driver ground |
| 引脚 34 | OVDD — Output driver supply |
| 引脚 35 | GND — Ground |
| 引脚 36 | AVDD — 1.8 V analog supply |
| 引脚 37 | AVDD — 1.8 V analog supply |
| 引脚 38 | GND — Ground |
| 引脚 39 | AVDD — 1.8 V analog supply |
| 引脚 40 | AVDD — 1.8 V analog supply |
| 引脚 41 | GND — Ground |
| 引脚 42 | AVDD — 1.8 V analog supply |
| 引脚 43 | AVDD — 1.8 V analog supply |
| 引脚 44 | GND — Ground |
| 引脚 45 | AVDD — 1.8 V analog supply |
| 引脚 46 | AVDD — 1.8 V analog supply |
| 引脚 47 | GND — Ground |
| 引脚 48 | AVDD — 1.8 V analog supply |
| 引脚 49 | AVDD — 1.8 V analog supply |
| 引脚 50 | GND — Ground |
| 引脚 51 | AVDD — 1.8 V analog supply |
| 引脚 52 | AVDD — 1.8 V analog supply |
典型应用
LTC2170CUKG-14 适用于 6 应用s: Portable Ultrasound Imaging, Multi-Channel Software-Defined Radio, Low-Power Industrial Imaging, Multi-Channel Communication Baseband, Portable Multi-Channel Instrumentation, Phased Array Radar Digitisation.
Portable Ultrasound Imaging
The LTC2170CUKG-14 is a strong fit for portable ultrasound imaging front-ends because it provides four simultaneously-sampling 14-bit, 25 Msps channels in one 52-QFN package, replacing what would otherwise require four discrete ADCs. Each channel's 90 dB SFDR preserves harmonic-free beamforming accuracy, while the 41 mW per channel power dissipation keeps total front-end power at 162 mW - critical for handheld probe designs running on battery power. The 800 MHz full-power analog bandwidth comfortably handles the 5-15 MHz ultrasound IF range without an external buffer, and the SPI-configurable 1 Vp-p/2 Vp-p input ranges allow direct coupling to variable-gain LNA outputs across dynamic beamforming depths. Recommended companion MPNs: AD8021 low-noise op-amp for LNA, AD9517 clock generator for jitter-clean LO.
推荐
Multi-Channel Software-Defined Radio
The LTC2170CUKG-14 suits multi-channel SDR receiver designs where four phase-coherent ADC channels are required to digitise independent antenna streams. Its simultaneous sampling eliminates channel-to-channel skew that discrete multi-ADC solutions cannot avoid without complex FPGA-based deskew logic. With 90 dB SFDR and 800 MHz analog input bandwidth, the part cleanly captures IF signals in the 0-50 MHz range with sufficient spurious margin for downstream digital down-conversion. The 1.8 V single-supply operation simplifies power tree design, and the serial LVDS output (1 or 2 bits per channel, selectable) minimises FPGA pin count compared to parallel CMOS ADCs. Recommended companion MPNs: ADL5380 quadrature demodulator, FPGA-based DDC.
推荐
Low-Power Industrial Imaging
The LTC2170CUKG-14 fits industrial multi-spectral imaging arrays (machine vision, spectral sortingers) that require four synchronised 14-bit channels sampling at line rates up to 25 Msps. Its 90 dB SFDR ensures accurate colour or spectral-bin discrimination, and 162 mW total dissipation simplifies thermal design in sealed IP67 housings. The 52-QFN (7x8 mm) package's exposed thermal pad lets heat sink directly into the PCB copper, eliminating the need for an external heatsink. SPI port allows runtime reconfiguration of input range and output mode, useful when the imaging system supports multiple sensor types with different signal swings. Recommended companion MPNs: image sensor front-end, FPGA co-processor.
推荐
Multi-Channel Communication Baseband
The LTC2170CUKG-14 is well-suited for 4-channel baseband digitisation in small-cell base-station receivers and multi-user MIMO testbeds. Four simultaneous-sampling 25 Msps channels directly capture I/Q baseband from four independent antennas, while the 14-bit resolution and 90 dB SFDR preserve modulation fidelity for downstream LTE/5G demodulation. Selectable 1 Vp-p / 2 Vp-p input ranges allow direct interface to typical transceiver outputs without an external PGA, and the serial LVDS interface (1 or 2 bits per channel, configurable) reduces FPGA routing congestion versus CMOS-parallel ADCs. Recommended companion MPNs: AD9361 transceiver, FPGA baseband processor.
推荐
Portable Multi-Channel Instrumentation
The LTC2170CUKG-14 enables portable 4-channel oscilloscopes, data loggers, and bench instruments by providing simultaneous 14-bit sampling across four isolated input channels in one IC. The 41 mW per channel power budget allows USB-powered or battery-operated designs, while 90 dB SFDR exceeds typical 8-bit handheld-scope accuracy by more than 50 dB. The 52-QFN (7x8 mm) footprint fits a small front-end PCB, and SPI port lets the host MCU configure input range, channel enable, and nap/shutdown modes on the fly for power-aware multi-mode operation. Recommended companion MPNs: front-end amplifier, FPGA display driver.
推荐
Phased Array Radar Digitisation
The LTC2170CUKG-14 serves phased-array radar sub-array digitisation where multiple antenna elements share a common ADC cluster. Its four simultaneously-sampled channels provide phase-coherent capture needed for digital beamforming, and 14-bit / 90 dB SFDR performance preserves dynamic range across the radar receive window. The 1.8 V single-supply rail simplifies integration with modern FPGA-based beamforming processors, while the exposed thermal pad of the 52-QFN package provides direct PCB heat sinking for sustained 162 mW operation. Recommended companion MPNs: low-noise LNA, beamforming FPGA.
推荐
推荐产品汇总
工程参考数据： LTC2170CUKG-14 ——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 | LTC2170IUKG-14#PBF | LTC2171CUKG-14#PBF | LTC2172CUKG-14#PBF | LTC2170CUKG-12#PBF | LTC2151CUJ-14 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 52-QFN (7x8 mm) | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 12 bit | 14 bit |
| Digital Output | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS |
关键差异点
- Lowest power consumption in the 14-bit/25 Msps quad ADC class （对比 LTC2171CUKG-14#PBF)
- Same 52-QFN pinout across LTC2170/2171/2172 family （对比 LTC2172CUKG-14#PBF)
- Pin-compatible 12-bit and 14-bit upgrade path （对比 LTC2170CUKG-12#PBF)
设计说明
Most of the heat generated by the LTC2170CUKG-14 is transferred from the die through the bottom-side exposed pad and package leads onto the printed circuit board (per ADI datasheet 21721014fb). The 52-QFN exposed pad must be soldered to a continuous copper plane on the top layer with multiple thermal vias stitching to inner ground/power planes to keep junction temperature within limits at 162 mW continuous dissipation.
Use a clean 1.8 V LDO or switching-regulator output for AVDD, decoupled locally with at least one 10 uF bulk + one 0.1 uF ceramic per AVDD pin pair. The OVDD rail for the LVDS output driver should be sourced from a separate filtered 1.8 V supply (or driven directly from the same regulator if LVDS drive strength does not inject switching noise back into the analog supply). Star-ground topology is recommended for the AGND/OGND split to avoid digital return-current coupling into analog input pins.
Route the four differential analog input pairs (AINA+/-, AINB+/-, AINC+/-, AIND+/-) as 100 ohm differential transmission lines with symmetric length matching to preserve channel-to-channel skew below 1 sample period at 25 Msps. The CLK+/CLK- LVDS clock pair should also be 100 ohm differential and length-matched to within 50 mil of any analog input trace pair to keep aperture-delay variations between channels below the LVDS-common-mode tolerance.
Do not operate the LTC2170CUKG-14 with floating SPI CS during power-up - hold CS low (or tied to logic-high inactive state per datasheet) to prevent spurious configuration writes. The exposed pad must NOT be left floating or un-soldered - doing so creates a thermal hot-spot and degrades SFDR by several dB. Always configure the MODE pin (or MODE SPI register) before applying the analog input signal; changing output mode mid-capture can produce momentary data corruption.
合规信息
LTC2170CUKG-14#PBF suffix indicates Pb-free RoHS-compliant packaging per ADI ordering nomenclature. Halogen-free status not explicitly stated in web data.
