LTC2415IGN#TRPBF - 24-Bit µPower Delta-Sigma ADC | ADI
料号： LTC2415IGN#TRPBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.1 | $131.00 |
| 100 | $11.5 | $1,150.00 |
| 500 | $10.2 | $5,100.00 |
| 1,000 | $9.1 | $9,100.00 |
LTC2415IGN#TRPBF 概述
What is a delta-sigma ADC? A delta-sigma (ΔΣ) converter is a type of analog-to-digital converter that oversamples an input signal at a much higher rate than its Nyquist bandwidth and uses noise shaping to push quantization noise outside the signal band, then low-pass filters and decimates the result. The technique delivers very high resolution (16 to 32 bits) and excellent linearity at low frequencies, at the cost of conversion speed. Within the converter taxonomy, delta-sigma sits between successive-approximation register (SAR) ADCs (faster, lower resolution) and integrating ADCs (highest noise rejection at DC). The LTC2415 belongs to the no-latency ΔΣ family — every conversion produces a valid output without the pipeline delay found in many multi-bit ΔΣ parts.
Key features include differential input and differential reference, on-chip oscillator, a 2.7 V – 5.5 V single supply, 24-bit output with 2 ppm INL, 0.23 ppm RMS noise (≈6 µV RMS at 5 V reference), and micropower operation. The common-mode voltage of both the input and the reference can be set independently anywhere between GND and VCC, easing bridge-, thermocouple-, and weigh-scale-style front ends.
The architecture is a fourth-order delta-sigma modulator followed by a digital decimation filter; this topology is what gives the LTC2415 its single-cycle settling behavior and its exceptional normal-mode rejection at mains frequencies. Pin-for-pin and electrically compatible with the LTC2415-1 variant, this part is also a fit in 4-wire RTD and load-cell systems where the differential reference directly cancels ratiometric errors.
Typical applications include precision weigh scales, strain-gauge bridges, thermocouple signal chains, 6-digit digital voltmeters, and battery-powered instrumentation. The wide common-mode range allows the ADC to digitize small differential signals riding on rails up to the full supply.
When designing with the LTC2415IGN#TRPBF, note that its effective input range is bounded by the reference voltage — using a 5 V reference yields ±5 V differential input capability, while a 100 mV reference reduces it to ±100 mV. Place the reference and input bypass capacitors close to the pins and keep the digital SCK, SDO, and CS traces away from analog inputs to preserve the 0.23 ppm RMS noise floor.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes that go beyond what is reproduced in the manufacturer datasheet, giving engineers one place to evaluate sourcing, parametric fit, and PCB-level design choices for the LTC2415 family.
直接替换替代料： LTC2415IGN#TRPBF ——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： LTC2415IGN#TRPBF （相同外形与封装尺寸） ——差异在于 Integrated Oscillator, Operating Temperature, Package, RMS Noise, Resolution.
快速对比工具——选择替代料号进行并排对比：
LTC2415CGN#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2415CGN#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2415-1IGN#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2415-1CGN#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2415IGN#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2415IGN#TRPBF 最大额定值与电气特性
| 分辨率 | 24 bit |
| Architecture | Delta-Sigma (no-latency) |
| Number of Input Channels | 1 differential |
| Conversion Rate | 15 SPS (single-cycle settling) |
| INL (Integral Non-Linearity) | 2 ppm |
| RMS Noise | 0.23 ppm (~6 µV RMS at 5 V ref) |
| Differential Reference Range | 0.1 V to VCC |
| Input Common-Mode Range | GND to VCC |
| Supply Voltage (VCC) | 2.7 V to 5.5 V |
| Integrated Oscillator | Yes (no external clock required) |
| Normal-Mode Rejection (50 Hz / 60 Hz) | >110 dB (with OS pin configuration) |
| 接口 | Serial (SPI-compatible) |
| Differential Input / Reference | Yes / Yes |
| 封装 | 16-pin SSOP (GN) |
| 安装类型 | Surface Mount |
| 工作温度 | -40 °C to +85 °C (industrial) |
| RoHS 状态 | Compliant |
LTC2415IGN#TRPBF 引脚配置
| 引脚 1 | CS — Chip Select (active low) — enables serial I/O when pulled low |
| 引脚 2 | SDO — Serial Data Output — conversion result is clocked out on this pin |
| 引脚 3 | SCK — Serial Clock Input — clocks data out on SDO |
| 引脚 4 | GND — Ground |
| 引脚 5 | REF+ — Positive Reference Input |
| 引脚 6 | REF- — Negative Reference Input |
| 引脚 7 | IN+ — Positive Differential Analog Input |
| 引脚 8 | IN- — Negative Differential Analog Input |
| 引脚 9 | VCC — Power Supply (2.7 V to 5.5 V) |
| 引脚 10 | OS — Oscillator Select — 50 Hz / 60 Hz rejection configuration |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | NC — Not connected (per datasheet) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
典型应用
LTC2415IGN#TRPBF 适用于 6 应用s: Precision Weigh Scales, Strain-Gauge Bridge Measurement, Thermocouple Signal Chain, 6-Digit Bench Digital Voltmeter (DVM), Battery-Powered Precision Instrumentation, Industrial Process-Control / 4-20 mA Loop Digitizer.
Precision Weigh Scales
The LTC2415IGN#TRPBF is purpose-built for precision weigh-scale signal chains where a load cell outputs a few millivolts of differential signal on top of a 2.5 V or 5 V common-mode bias. Its differential input accepts the bridge output directly, while the differential reference pin lets the designer tie the ADC reference to the bridge excitation rail — any drift in the excitation is cancelled ratiometrically. With 2 ppm INL and 0.23 ppm RMS noise (~6 µV RMS at 5 V reference), the part resolves better than 1 part in 100,000 on a 5 V full-scale bridge, which is enough for 6-digit bench scales and legal-for-trade applications. The integrated oscillator eliminates the crystal and the >110 dB 50 Hz / 60 Hz normal-mode rejection removes line-frequency beating — both critical when the scale sits next to switching power supplies.
推荐
Strain-Gauge Bridge Measurement
A strain-gauge bridge typically outputs 1–10 mV differential with a 2.5 V or 5 V common-mode offset, and the LTC2415IGN#TRPBF is engineered to digitize that signal without an instrumentation amplifier. The differential input pins accept the bridge directly, the GND-to-VCC common-mode range covers grounded bridges as well as bridges biased from the supply rail, and the 0.23 ppm RMS noise means even a 1 mV full-scale signal is resolved to better than 0.001 %. According to the LTC2415 datasheet, the differential reference input further cancels excitation drift in 4-wire bridge configurations. Industrial stress-monitoring systems and weigh-in-motion sensors benefit from the part's industrial -40 °C to +85 °C temperature grade and integrated oscillator — no external clock components drift with temperature.
推荐
Thermocouple Signal Chain
Type K, J, T and other thermocouples output tens of microvolts per °C, and the LTC2415IGN#TRPBF is one of the few ADCs that can digitize those signals directly without an analog front end. Its 0.23 ppm RMS noise floor (≈1.2 µV RMS at 1 V reference, ≈6 µV RMS at 5 V reference) is below the thermocouple's own thermal noise, so the ADC adds no measurable uncertainty. The wide GND-to-VCC common-mode range lets the thermocouple cold-junction compensation sensor be biased anywhere in the supply range, simplifying cold-junction compensation IC selection. With single-cycle settling and 110 dB 50 Hz / 60 Hz rejection, the LTC2415 captures true thermocouple DC voltage without aliasing mains hum — ideal for 0.1 °C-class temperature data loggers.
推荐
6-Digit Bench Digital Voltmeter (DVM)
A 6-digit bench DVM needs true 24-bit resolution and sub-µV noise at low sample rates — exactly the LTC2415IGN#TRPBF's sweet spot. Its differential input lets the meter measure both ±10 V full-scale signals (with a 10 V reference and input divider) and µV-level signals (with a 100 mV reference) without changing hardware. The integrated oscillator eliminates the need for a precision clock and avoids beat-frequency hum that would otherwise limit AC-line-rejection. Combined with a 4-wire Kelvin input network and a precision 5 V reference such as the LT1021-5, the LTC2415 delivers 1 µV resolution, 2 ppm linearity, and the >110 dB 50 Hz / 60 Hz rejection needed for a handheld or bench DVM product.
推荐
Battery-Powered Precision Instrumentation
The LTC2415IGN#TRPBF is well suited to battery-powered instrumentation such as portable data loggers, field-calibration instruments, and remote environmental sensors where supply current, resolution, and AC-line rejection all matter simultaneously. Its micropower operation (a few hundred microamps of supply current at 15 SPS), integrated oscillator, and >110 dB 50 Hz / 60 Hz normal-mode rejection mean the part can digitize µV-level signals directly from a 3.3 V coin-cell or Li-ION supply without power-hungry amplification. The 2.7 V – 5.5 V supply range covers single-cell Li-ION, two-cell alkaline, and 3.3 V or 5 V regulated rails, giving product designers flexibility on battery topology.
推荐
Industrial Process-Control / 4-20 mA Loop Digitizer
In a 4-20 mA current loop, a sense resistor converts loop current to a small differential voltage that the ADC must digitize with high accuracy. The LTC2415IGN#TRPBF accepts the differential voltage across the sense resistor directly and digitizes it to 24-bit precision, while its differential reference pin can be tied to a precision shunt voltage so excitation drift is rejected. The wide common-mode range means the ADC can sit anywhere in the loop — including at the high-side near the transmitter — without level-shifting. Combined with >110 dB 50 Hz / 60 Hz rejection and industrial -40 °C to +85 °C temperature grade, the LTC2415 is a drop-in ADC for loop-powered process transmitters and PLC analog input modules.
推荐
推荐产品汇总
工程参考数据： LTC2415IGN#TRPBF ——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 | LTC2415CGN#TRPBF | LTC2415CGN#PBF | LTC2415-1IGN#TRPBF | LTC2415-1CGN#TRPBF | LTC2415IGN#PBF |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 16-SSOP (GN) | 16-SSOP (GN) - same | 16-SSOP (GN) - same | 16-SSOP (GN) - same | 16-SSOP (GN) - same | 16-SSOP (GN) - same |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Conversion Rate | 15 SPS | 15 SPS | 15 SPS | 15 SPS | 15 SPS | 15 SPS |
| RMS Noise | 0.23 ppm | 0.23 ppm | 0.23 ppm | 0.23 ppm | 0.23 ppm | 0.23 ppm |
| INL | 2 ppm | 2 ppm | 2 ppm | 2 ppm | 2 ppm | 2 ppm |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Differential Reference | Yes (single-ended reference pin) | Yes (single-ended reference pin) | Yes (single-ended reference pin) | Yes (fully-differential reference pins) | Yes (fully-differential reference pins) | Yes (single-ended reference pin) |
| Operating Temperature | -40 °C to +85 °C (industrial) | 0 °C to +70 °C (commercial) | 0 °C to +70 °C (commercial) | -40 °C to +85 °C (industrial) | 0 °C to +70 °C (commercial) | -40 °C to +85 °C (industrial) |
| Packaging Form | Tape & Reel (TRPBF) | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tube |
关键差异点
- Single-cycle no-latency conversion at 15 SPS （对比 LTC2440 (24-bit delta-sigma at higher speed with multi-cycle latency))
- Integrated oscillator eliminates external clock （对比 ADS1220 (24-bit delta-sigma with external clock option))
- Wide independent common-mode range on input and reference （对比 AD7799 (24-bit sigma-delta with internal PGA))
设计说明
Place the 10 µF reference bypass capacitor as close as possible to the REF+ pin, with a 0.1 µF ceramic cap in parallel for high-frequency decoupling. Keep the REF- and GND traces short and route them in a star-ground topology so return currents from SCK, SDO, and CS do not flow under the analog input pins. The datasheet's typical-application circuit shows the reference capacitor returned directly to GND, not to the load-side ground of a bridge — violating it couples digital switching noise into the reference and degrades the 0.23 ppm RMS noise floor.
Do not exceed VCC on REF+ or REF-, and ensure the differential reference voltage is between 0.1 V and VCC. The common-mode voltage of REF+ and REF- can be set anywhere between GND and VCC, but if the reference common-mode voltage differs from the input common-mode voltage, the input common-mode range is reduced by the same amount. For ratiometric load-cell designs, tie REF+ to the bridge excitation and REF- to GND — this makes the conversion result independent of excitation drift, which is the most common cause of weigh-scale temperature error.
Estimated: at 15 SPS with a 4.096 MHz internal oscillator, the LTC2415's digital switching transients couple most strongly into the SCK and SDO traces. Route the SCK, SDO, and CS traces on the opposite side of the PCB from the IN+, IN-, REF+, and REF- traces, using a continuous ground plane on an inner layer. Keep the analog input traces short and symmetric — a 5 mm length mismatch on a 24-bit no-latency ADC can introduce 0.5 ppm of full-scale gain error. Place a guard trace tied to GND around the analog inputs if the digital traces must cross the analog area on the same layer.
合规信息
RoHS and lead-free status confirmed by the #PBF/#TRPBF suffix per Analog Devices ordering information. AEC-Q100 not applicable — ADC is not qualified for automotive use. Halogen-free and conflict-minerals status not stated in the verified web data.
