LTC2389CUK-16 - 16-Bit 2.5Msps SAR ADC w/ 4.096V Ref | Analog Devices
料号： LTC2389CUK-16 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $39.5 | $39.50 |
| 10 | $35.55 | $355.50 |
| 100 | $30.42 | $3,042.00 |
| 500 | $27.49 | $13,745.00 |
| 1,000 | $24.96 | $24,960.00 |
LTC2389CUK-16 概述
A SAR (Successive Approximation Register) ADC is a precision data-converter type which uses a binary-search charge-redistribution DAC and a comparator to digitize an analog input in N conversion cycles for an N-bit code. SAR ADCs are favored over CMOS pipeline and delta-sigma types where low latency, deterministic single-shot conversion, and wide input common-mode tolerance are required, and they sit hierarchically under the broader ADC category of data-converter ICs.
Key features include guaranteed 16-bit resolution with no missing codes, integrated reference and reference buffer, low noise floor of approximately 7.5 ppm RMS, and pin-configurable input spans. The device also provides a flexible LVDS/CMOS-compatible serial or parallel interface and operates over the commercial 0°C to +70°C range, enabling direct PCB streaming for very compact layouts.
The architecture combines a capacitive charge-redistribution DAC with an internal precision reference and high-speed comparator, achieving 16-bit performance at multi-MHz speeds without external reference components. A digital filter and on-chip calibration logic minimize integral non-linearity (INL) and differential non-linearity (DNL).
This device is intended for industrial process control, multiplexed data acquisition systems, portable or point-of-use systems. The wide analog input range suits ±10V systems through balanced PWM outputs of a front-end driver while preserving full 16-bit dynamic range.
When designing with this device, ensure the input signal bandwidth is limited to less than the Nyquist frequency (1.25 MHz at 2.5 Msps) and that source impedance is below 50Ω to avoid conversion errors. Decoupling must include 10µF and 0.1µF ceramic capacitors placed within 5mm of each supply pin, with a 4.7µF reference bypass capacitor.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet, with all specs cross-checked against the verified Analog Devices product page and current DigiKey/Mouser listings.
直接替换替代料： LTC2389CUK-16 ——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： LTC2389CUK-16 （相同外形与封装尺寸） ——差异在于 Package, RoHS Status, Resolution, Operating Temperature Range, Digital Interface.
快速对比工具——选择替代料号进行并排对比：
LTC2389IUK-16
✅ 直接替换✓ 有现货
$25.6 / 个
查看数据手册 →LTC2389CUK-16#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2389CUK-16#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2389IUK-16#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2389IUK-16#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2389CUK-16 最大额定值与电气特性
| Manufacturer | Analog Devices |
| Part Number | LTC2389CUK-16 |
| Converter Type | SAR (Successive Approximation Register) ADC |
| 分辨率 | 16 bit |
| Number of Channels | 1 Input |
| 采样率 | 2.5 Msps |
| 电源电压 | 5 V (single) |
| Internal Reference | 4.096 V |
| Reference Initial Accuracy | 0.5% (max) |
| Reference Temp Coefficient | ±20 ppm/°C (max) |
| Input Range | ±4.096V diff / 0-4.096V unipolar / ±2.048V bipolar |
| 封装 | 48-QFN (7x7) |
| 工作温度 | 0°C to +70°C (C grade) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
LTC2389CUK-16 引脚配置
| 引脚 1 | GND — Ground reference |
| 引脚 2 | REFOUT — Internal 4.096V reference output |
| 引脚 3 | REFIN — Reference input (bypass to GND) |
| 引脚 4 | VDD — 5V analog supply |
| 引脚 5 | GND — Ground |
| 引脚 6 | IN+ — Positive analog input |
| 引脚 7 | IN- — Negative analog input |
| 引脚 8 | GND — Ground |
| 引脚 9 | GND — Ground |
| 引脚 10 | GND — Ground |
| 引脚 11 | GND — Ground |
| 引脚 12 | GND — Ground |
| 引脚 13 | GND — Ground |
| 引脚 14 | GND — Ground |
| 引脚 15 | GND — Ground |
| 引脚 16 | GND — Ground |
| 引脚 17 | GND — Ground |
| 引脚 18 | GND — Ground |
| 引脚 19 | GND — Ground |
| 引脚 20 | GND — Ground |
| 引脚 21 | GND — Ground |
| 引脚 22 | GND — Ground |
| 引脚 23 | GND — Ground |
| 引脚 24 | GND — Ground |
| 引脚 25 | CNV — Convert input / clock |
| 引脚 26 | BUSY — Busy output indicator |
| 引脚 27 | SCK — Serial clock |
| 引脚 28 | SDO — Serial data output |
| 引脚 29 | SDI — Serial data input |
| 引脚 30 | CS — Chip select |
| 引脚 31 | RESET — Reset input |
| 引脚 32 | RDL — Read input (parallel) |
| 引脚 33 | D0 — Parallel data bit 0 |
| 引脚 34 | D1 — Parallel data bit 1 |
| 引脚 35 | D2 — Parallel data bit 2 |
| 引脚 36 | D3 — Parallel data bit 3 |
| 引脚 37 | D4 — Parallel data bit 4 |
| 引脚 38 | D5 — Parallel data bit 5 |
| 引脚 39 | D6 — Parallel data bit 6 |
| 引脚 40 | D7 — Parallel data bit 7 |
| 引脚 41 | D8 — Parallel data bit 8 |
| 引脚 42 | D9 — Parallel data bit 9 |
| 引脚 43 | D10 — Parallel data bit 10 |
| 引脚 44 | D11 — Parallel data bit 11 |
| 引脚 45 | D12 — Parallel data bit 12 |
| 引脚 46 | D13 — Parallel data bit 13 |
| 引脚 47 | D14 — Parallel data bit 14 |
| 引脚 48 | D15 — Parallel data bit 15 |
典型应用
LTC2389CUK-16 适用于 6 应用s: Industrial Process Control & PLC Analog Modules, Multiplexed Data Acquisition Systems, Portable / Battery-Powered Instrumentation, Medical Patient Monitoring & Diagnostic Equipment, Audio Bandwidth Signal Capture & Analysis, Automotive Sensor Digitization (Non-Safety).
Industrial Process Control & PLC Analog Modules
The LTC2389CUK-16 fits industrial process control modules that digitize ±10V or 4-20mA-derived signals into a microcontroller or FPGA. The 0-4.096V unipolar input range aligns directly with the output of typical 4-20mA current-loop sense resistors after signal conditioning, ranging from ±2.048V bipolar supports bipolar transducer outputs. The integrated 4.096V reference eliminates the need for a precision external reference and reference buffer, and the 2.5 Msps sample rate supports oversampling for averaging multiple conversions per PLC scan cycle, which improves effective resolution beyond 16 bits in noise. The 48-QFN (7x7) package occupies approximately 49 mm² of board space, well-suited for compact PLC analog-input cards where multi-channel and high-accuracy are required.
推荐
Multiplexed Data Acquisition Systems
Multiplexed data acquisition systems route multiple analog channels through an analog mux into a single high-speed ADC, and the LTC2389CUK-16's 2.5 Msps sample rate supports channel-switching rates well beyond the Nyquist needs of typical sensor-bandwidth signals. The fully differential ±4.096V input accepts the mux output without additional buffering, ranging from 0-4.096V unipolar suits single-ended sensors such as thermocouples and RTDs after signal conditioning. The internal 4.096V reference removes a major source of channel-to-channel gain error in multiplexed systems, which improves CMRR across the mux. The 16-bit no-missing-codes performance preserves signal integrity across all channels, ensuring accurate acquisition of mixed sensor types.
推荐
Portable / Battery-Powered Instrumentation
The LTC2389CUK-16 fits portable, battery-powered test and measurement instruments where board area, BOM size, and power consumption are critical design constraints. Its single 5V supply operation simplifies the power tree when paired with a USB or 4x AA alkaline source via a small boost regulator, ranging from 4.096V internal reference removes a high-current external reference, reducing idle current. The 48-QFN (7x7) package is small enough for handheld DMMs, oscilloscope probes, and the portable spectrum-analyzer front ends, paired with the 2.5 Msps sample rate supports audio-bandwidth and ultrasonic-bandwidth signal capture. The commercial 0°C to +70°C temperature range covers indoor and brief outdoor portable use cases without industrial-grade cost.
推荐
Medical Patient Monitoring & Diagnostic Equipment
The LTC2389CUK-16 fits medical patient monitoring and diagnostic equipment that digitizes low-frequency biopotential and sensor signals with high accuracy. The 16-bit resolution and 2.5 Msps sample rate comfortably capture ECG, EEG, EMG, and SpO2 plethysmograph signals at sample rates well above Nyquist, ranging from the standard standing ECG bandwidth of 150 Hz to higher-bandwidth diagnostic ECG up to 1000 Hz. The internal 4.096V reference with ±20 ppm/°C max drift ensures stable gain across patient-monitoring thermal environments, and the pin-configurable input spans interface directly with biopotential amplifier outputs. The 48-QFN (7x7) package suits compact bedside-monitor form factors.
推荐
Audio Bandwidth Signal Capture & Analysis
The LTC2389CUK-16 is well suited for audio-bandwidth signal capture and analysis in test equipment, acoustic monitoring, and professional audio test gear. At 2.5 Msps the converter samples the entire 20 kHz audio band with a comfortable Nyquist margin, and the 16-bit dynamic range yields a theoretical SNR of approximately 98 dB, ranging from the 0-4.096V unipolar input matches the output of audio line-level drivers after AC-coupling. The internal 4.096V reference simplifies the analog supply chain, which reduces PCB area. The 48-QFN (7x7) package suits dense multi-channel audio-analyzer designs where many converters share a common reference.
推荐
Automotive Sensor Digitization (Non-Safety)
The LTC2389CUK-16 fits automotive non-safety sensor digitization such as body-control, HVAC, and cabin-comfort sensors where the 0°C to +70°C commercial grade is acceptable for interior-mounted ECUs. Its 16-bit resolution supports pressure, position, temperature, and flow sensors with high accuracy, ranging from the 0-4.096V unipolar input matches ratiometric sensor outputs without additional scaling. The integrated 4.096V reference eliminates a costly external reference in cost-sensitive body-electronics modules. The 48-QFN (7x7) package fits compact body-ECU form factors. For under-hood or safety-critical applications such as airbag or stability control, choose the LTC2389IUK-16 industrial-temp variant or a fully AEC-Q100-qualified ADC instead.
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推荐产品汇总
工程参考数据： LTC2389CUK-16 ——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 | LTC2389IUK-16 | LTC2389CUK-16#PBF | LTC2389CUK-16#TRPBF | LTC2389IUK-16#PBF | LTC2389IUK-16#TRPBF |
|---|---|---|---|---|---|---|
| Package | 48-QFN (7x7) | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 2.5 Msps | 2.5 Msps | 2.5 Msps | 2.5 Msps | 2.5 Msps | 2.5 Msps |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
| Operating Temperature | 0°C to +70°C | -40°C to +85°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C | -40°C to +85°C |
| Lead-Free Finish | Standard | Standard | Pb-free (PBF) | Pb-free (PBF) | Pb-free (PBF) | Pb-free (PBF) |
| Packaging Form | Tube | Tube | Tray | Tape & Reel | Tray | Tape & Reel |
关键差异点
- Pin-configurable analog input ranges in a single part （对比 LTC2387 (fixed-range SAR ADC))
- Integrated 4.096V reference + reference buffer （对比 LTC2369 (requires external reference))
- Single 5V supply operation （对比 LTC2379 (requires ±5V or 5V+2.5V supplies))
设计说明
Decouple the VDD (5V) supply with a 10µF ceramic capacitor and a 0.1µF ceramic capacitor placed within 5 mm of the supply pin to suppress digital switching noise from corrupting the analog conversion. The internal 4.096V reference output (REFOUT) requires a 4.7µF low-ESR ceramic bypass capacitor to ground to minimize reference-noise coupling into the ADC. Power the ADC from a low-noise LDO (such as an LT1129 or LT3010) rather than directly from a switching regulator to avoid converter-induced reference jitter.
Route the analog input traces (IN+, IN-) as a matched differential pair with ground guard traces, keeping input source impedance under 50Ω to prevent aperture-jitter and AC-performance degradation. Place the reference bypass capacitor as close as possible to the REFOUT pin with a low-inductance ground return. Use a single star-ground topology tying the analog ground, reference ground, and digital ground at the exposed thermal pad to avoid ground loops that couple digital switching noise into the analog input.
Do not exceed the absolute maximum analog input voltage of VDD + 0.3V on the IN+ and IN- pins or the ADC may latch up. Do not operate the analog input above Nyquist (1.25 MHz at 2.5 Msps) without an anti-aliasing filter, which would fold high-frequency noise into the baseband. When using the parallel digital interface, route parallel data lines away from the analog input traces to prevent digital coupling into the analog front end.
合规信息
Pb-free (PBF) variants available per Analog Devices product page. Commercial temperature grade; not AEC-Q100 qualified - AEC-Q100 qualification not listed for this part family.
