AD7177-2SDZ - 32-Bit 10kSPS Sigma-Delta ADC Eval Board | ADI
料号： AD7177-2SDZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $138.5 | $138.50 |
| 5 | $129 | $645.00 |
| 10 | $121.5 | $1,215.00 |
| 25 | $112 | $2,800.00 |
| 50 | $104.75 | $5,237.50 |
AD7177-2SDZ 概述
An evaluation board (EVAL-AD7177-2SDZ) is a development tool used to characterize a data-converter IC under real-world conditions; it exposes the converter's analog inputs, reference inputs, power rails, and digital serial interface on test points and screw terminals so engineers can run the part through its full input range without designing a custom PCB. Evaluation kits therefore sit one level below reference designs in the typical ADC design hierarchy: bare silicon -> evaluation board -> customer reference design -> production PCB.
The onboard AD7177-2 sigma-delta modulator delivers 32-bit resolution at up to 10 kSPS, supports both fully differential and pseudo-differential input configurations, and integrates true rail-to-rail buffers that absorb switching kickback from the modulator's input sampling capacitors. The 100 microsecond settling specification allows full-scale step response settling to within 24-bit accuracy in fewer than three conversion cycles at the highest output data rate, which is critical for multiplexed channel scanning.
Typical applications include precision weigh scales, temperature measurement bridges (RTD, thermocouple with cold-junction compensation), industrial process control loops, and laboratory instrumentation. The wide input common-mode range combined with the integrated buffers removes the need for external driver amplifiers in most low-impedance sensor front-ends.
When designing with this evaluation board, populate the external amplifier section footprint only when the source impedance exceeds the buffer's linear input range; for low-Z sensors leave it unpopulated. The included ADR441-class reference footprint should be used to characterize real-world noise performance against the datasheet's typical 24-bit noisefloor curves.
This page synthesizes distributor pricing, drop-in alternative converters in the same LFCSP/QFN footprint, and practical bench-test design notes that are not duplicated in the manufacturer datasheet.
直接替换替代料： AD7177-2SDZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
EVAL-AD7175-2SDZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
EVAL-AD7195-4SDZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
EVAL-AD7173-8SDZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
EVAL-AD7172-4SDZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD7177-2SDZ 最大额定值与电气特性
| Part Type | Evaluation Board (Development Kit) |
| Onboard Converter | AD7177-2 sigma-delta ADC |
| 分辨率 | 32-bit |
| Maximum Output Data Rate | 10 kSPS |
| Settling Time | 100 microseconds (full-scale step) |
| Input Channels | 2 or 4 (fully differential / pseudo-differential) |
| Analog Input Buffers | Integrated, true rail-to-rail |
| Reference Input | Fully differential (REF+, REF-) |
| Recommended Reference | ADR445 / ADR444 / ADR441 |
| On-board Supply Voltage | 5 V and 3.3 V (regulated) |
| External AC Adapter Input | 7 V to 9 V |
| External Amplifier Section | Yes (populated for amplifier evaluation) |
| Operating Mode | Single-ended or differential |
| 安装类型 | Bench-top (screw-terminal analog I/O) |
| RoHS 状态 | Compliant |
AD7177-2SDZ standard 引脚配置指南
AD7177-2SDZ（standard 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： AD7177-2SDZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD7177-2SDZ 适用于 6 应用s: Precision Weigh Scale Front-End, RTD Temperature Measurement Bridge, Industrial Process Control Loop Monitoring, Laboratory Precision Instrumentation, Thermocouple Temperature Acquisition, Data Acquisition Module Prototyping.
Precision Weigh Scale Front-End
The AD7177-2's 32-bit resolution, 10 kSPS output data rate, and 100 microsecond full-scale settling make the EVAL-AD7177-2SDZ ideal for characterizing multi-load-cell weigh-scale front-ends. The integrated true rail-to-rail buffers absorb switching kickback from the sigma-delta modulator's input capacitors, eliminating the need for an external driver amplifier when paired with typical 350 ohm bridge impedances. The ADR445-class reference recommended on the board footprint delivers the low 1/f noise floor required to resolve sub-ppm weight changes. The on-board external amplifier section also enables engineers to evaluate the ADA4528 family as a precision buffer for very-high-impedance strain gauges. Placed between the load-cell bridge and the host microcontroller's DMA controller via SPI, this eval kit removes weeks of PCB bring-up time.
推荐
RTD Temperature Measurement Bridge
The EVAL-AD7177-2SDZ is well suited for prototyping 4-wire RTD and 3-wire RTD temperature measurement systems where excitation current must be ratiometric to the ADC reference. The board's differential input configuration cancels thermocouple-style common-mode noise in industrial cabling, while the true rail-to-rail buffers accept the full PT100/PT1000 output swing directly. At 10 kSPS the converter supports oversampling-and-averaging to push effective resolution beyond 24 bits for sub-0.01 C temperature measurements when a high-stability reference such as ADR444 is populated. The differential REF+/REF- inputs let the engineer pair excitation current with reference to reject supply noise. Reference design patterns are documented in the AD7177-2 datasheet typical application circuit.
推荐
Industrial Process Control Loop Monitoring
The EVAL-AD7177-2SDZ provides a ready-made platform for evaluating 4-channel industrial process control inputs, including 4-20 mA current-loop receivers and 0-10 V voltage inputs with proper scaling. The 100 microsecond settling time is fast enough to scan multiple channels sequentially inside a typical PLC scan cycle without sacrificing 24-bit-class noise performance at reduced data rates. The on-board 5 V and 3.3 V regulated supplies let engineers drive the kit directly from a benchtop AC adapter, isolating ADC performance from noisy 24 V industrial rails during characterization. The integrated rail-to-rail analog input buffers tolerate the full industrial common-mode range present on long sensor cables.
推荐
Laboratory Precision Instrumentation
The EVAL-AD7177-2SDZ is ideal for prototyping bench-top laboratory instruments such as digital multimeters, LCR meters, and source-measurement units where 32-bit dynamic range and 10 kSPS are required. The board's on-board reference footprint accepts the ADR445 to characterize real-world performance against datasheet noise curves. The external amplifier section is designed to accept ADA4528-class zero-drift op-amps for high-impedance input stages. Combined with the SPI-compatible digital interface exposed on the screw terminals, the kit integrates with most FPGA-based instrument controllers for rapid algorithm development. This makes it a common choice for metrology-grade prototyping where the 100 microsecond settling enables rapid autoranging.
推荐
Thermocouple Temperature Acquisition
The EVAL-AD7177-2SDZ suits thermocouple-based temperature acquisition when paired with a precision cold-junction compensation sensor such as the ADT7310 placed on the screw-terminal block. The differential input topology rejects common-mode thermocouple wire noise picked up across long industrial cable runs, and the true rail-to-rail analog input buffers accept millivolt-level thermocouple outputs without external instrumentation amplifiers. At 10 kSPS the converter supports digital filtering to push effective resolution beyond 20 bits for sub-0.1 C type-K measurements. Reference design patterns in the AD7177-2 datasheet show recommended thermocouple front-end topologies with cold-junction compensation. Engineers use this eval kit to verify noise floor before committing to a custom PCB layout.
推荐
Data Acquisition Module Prototyping
The EVAL-AD7177-2SDZ serves as the prototype platform for embedded data-acquisition modules in industrial IoT edge devices, providing a 4-channel, 32-bit analog front end with on-board power regulation. The integrated SPI interface exposes the ADC directly to most Cortex-M class microcontrollers for DMA-driven sample streaming, and the integrated buffers eliminate the external driver amplifier that would otherwise consume PCB area in a production module. At 10 kSPS the kit delivers enough throughput to support multi-sensor fusion at the network edge. The on-board reference footprint accepts the ADR444/ADR445 series for designs requiring low-drift, low-noise references.
推荐
推荐产品汇总
工程参考数据： AD7177-2SDZ ——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 | EVAL-AD7175-2SDZ | EVAL-AD7195-4SDZ | EVAL-AD7173-8SDZ | EVAL-AD7172-4SDZ |
|---|---|---|---|---|---|
| Package | Evaluation Board (PCB) | Evaluation Board (PCB) - same form factor | Evaluation Board (PCB) - same form factor | Evaluation Board (PCB) - same form factor | Evaluation Board (PCB) - same form factor |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Onboard ADC Resolution | 32-bit | 24-bit | 24-bit | 32-bit | 24-bit |
| Maximum Output Data Rate | 10 kSPS | 10 kSPS | 4.8 kSPS | 10 kSPS | 10 kSPS |
| Input Channels | 2 or 4 (fully differential / pseudo-differential) | 2 or 4 | 4 or 8 | 8 or 16 | 4 or 8 |
| Integrated Analog Input Buffers | Yes (true rail-to-rail) | Yes | No (external required) | Yes | No (external required) |
| On-board Supplies | 5 V and 3.3 V from 7-9 V adapter | 5 V and 3.3 V from external supply | 5 V and 3.3 V from external supply | 5 V and 3.3 V from external supply | 5 V and 3.3 V from external supply |
关键差异点
- Highest speed-to-resolution combination in ADI 32-bit sigma-delta family （对比 EVAL-AD7195-4SDZ)
- True rail-to-rail integrated input buffers eliminate external driver amplifiers （对比 EVAL-AD7172-4SDZ)
- Wider multiplexer channel count than 2-channel competitive eval boards （对比 EVAL-AD7175-2SDZ)
设计说明
Do not connect the analog inputs to a source impedance exceeding the buffer's linear input range before first characterizing performance with the on-board amplifier section unpopulated. For high-impedance sensors (greater than 10 kohm), populate the external amplifier footprint with an ADA4528-class zero-drift op-amp to avoid degrading the AD7177-2's 24-bit-class noise floor. Also verify that REF+ and REF- reference bypass capacitors are placed as close to the IC pins as shown in the EVAL-AD7177-2SDZ user guide.
When migrating from the EVAL-AD7177-2SDZ to a custom PCB, mirror the evaluation board's analog/digital ground partitioning: keep the ADC AGND and DGND pins tied at a single star point under the IC, and route the SPI clock and data lines away from the analog input traces. The on-board 4-layer stackup uses an internal ground plane; two-layer custom boards typically need increased guard traces around the analog inputs to retain 24-bit performance.
The EVAL-AD7177-2SDZ derives 5 V and 3.3 V from a 7 V to 9 V AC adapter. On a custom PCB, place a 10 microfarate ceramic bypass capacitor on each AVDD/DVDD pin within 5 mm of the IC and add a ferrite bead between the analog and digital 3.3 V domains to suppress digital switching noise coupling into the analog front end. The AD7177-2 datasheet typical application circuit shows the recommended ferrite-bead-and-capacitor network.
合规信息
RoHS and REACH compliance confirmed per Analog Devices product page. Evaluation boards are not AEC-Q100 qualified; the production-grade AD7177-2 silicon may have separate qualification status not extracted from the verified web data.
