AD977CN - 16-Bit 100 kSPS ADC | Analog Devices
料号： AD977CN ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
AD977CN 概述
An ADC is a data-acquisition IC that converts an analog voltage into a digital code. A successive-approximation ADC, commonly called a SAR ADC, performs conversion by comparing the unknown input with an internally generated trial voltage and progressively refining a binary approximation. The AD977CN therefore belongs to the ADC, data-converter, signal-processing, and semiconductor hierarchy, with relevance to industrial measurement, instrumentation, communications, and embedded control systems.
The converter provides a 16-bit resolution, a 100 kSPS throughput rate, and single 5 V operation. Its input architecture includes unipolar ranges of 5 V and 4 V and bipolar ranges of 5 V and 3.3 V, according to the verified manufacturer product information. Available interface choices and power-management behavior should be confirmed in the manufacturer datasheet for the exact AD977CN ordering configuration. Maximum power dissipation is listed as 100 mW in the supplied verified description, while a power-down mode is also indicated.
Because this is a SAR ADC, the input is sampled and converted through a sequence of internal comparison decisions rather than a parallel flash architecture. This makes the converter suitable for control loops, sensor interfaces, test equipment, and communication front ends that need moderate speed and high resolution. The AD977CN is a 100 kSPS device, whereas AD977A is the 200 kSPS family variant; selecting the correct suffix is important when sample rate is a hard system constraint.
AD977CN applications include industrial process monitoring, precision instrumentation, communications receivers, data-acquisition cards, and embedded measurement systems. In each case, the analog front end must establish the correct input range, provide suitable reference and drive circuitry, and account for acquisition time before conversion. The serial or parallel data interface and required digital support components should be selected from the datasheet and system clock plan.
A key design consideration is the input and reference network. Incorrect source impedance, inadequate filtering, or unsuitable bypass capacitance can degrade effective resolution and conversion accuracy. The 5 V supply should be decoupled close to the device, and the analog input should be protected against overvoltage and transients. Because the AD977CN is listed as obsolete in one verified distributor-style source, new designs should confirm lifecycle status, availability, and any supported migration path before committing to production.
This page consolidates the verified Analog Devices family description, distributor identity, package information, and practical replacement guidance for AD977CN. It also distinguishes confirmed facts from parameters that require the exact manufacturer datasheet, helping engineers evaluate the obsolete 16-bit SAR ADC without treating unverified electrical values as production specifications.
直接替换替代料： AD977CN ——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： AD977CN （相同外形与封装尺寸） ——差异在于 Package, Supply Voltage, Throughput Rate, Mounting Type, Power-Down Mode.
快速对比工具——选择替代料号进行并排对比：
AD977AN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD977ABR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$14.5 / 个
查看数据手册 →AD977AR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →AD977ARZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD977CN 最大额定值与电气特性
| Converter Type | Successive-approximation A/D converter |
| 分辨率 | 16 bit |
| Throughput Rate | 100 kSPS for AD977 |
| Family Comparison Throughput | 200 kSPS for AD977A |
| 电源电压 | Single 5 V |
| Input Range | Unipolar 5 V; unipolar 4 V; bipolar 5 V; bipolar 3.3 V |
| Power Dissipation | 100 mW maximum |
| Power-Down Mode | Supported |
| 封装 | 20-pin DIP |
| 安装类型 | Through-hole |
| 引脚数量 | 20 pins |
| Terminal Form | Through-hole |
| Temperature Grade | Industrial |
| Manufacturer | Analog Devices |
| 生命周期状态 | Obsolete |
| AEC-Q100 Status | not_applicable |
AD977CN 20-pin dip 引脚配置指南
AD977CN（20-pin dip 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： AD977CN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD977CN 适用于 6 应用s: Industrial Process Measurement, Precision Instrumentation, Communications Receiver, Data-Acquisition Card, Embedded Sensor Interface, Test and Measurement Equipment.
Industrial Process Measurement
The AD977CN fits industrial process measurement when a system needs 16-bit resolution and moderate conversion throughput rather than the 200 kSPS rate of AD977A. Place the converter behind an analog front end that maps the sensor voltage into one of the documented unipolar or bipolar ranges, then use software averaging and calibration to reduce quantization and offset effects. Its single 5 V supply simplifies system partitioning, while the 100 kSPS rate provides enough sampling speed for many slow or medium-speed control variables. The 20-pin through-hole package favors legacy instrumentation and test equipment.
推荐
Precision Instrumentation
For laboratory and bench instrumentation, AD977CN can convert slow or moderate analog signals with 16-bit code width while retaining a straightforward 5 V analog supply architecture. The verified device family supports unipolar 5 V and 4 V ranges as well as bipolar 5 V and 3.3 V ranges, allowing the front end to be designed around common sensor and source levels. Filtering, shielding, reference stability, and PCB cleanliness become important when the application expects the converter's nominal resolution to be useful. The obsolete lifecycle status makes redesign planning essential for long-lived instruments.
推荐
Communications Receiver
AD977CN may be used in a communications receiver or demodulation path when the received envelope, control voltage, or IF-derived signal changes slowly enough for 100 kSPS conversion. Its 16-bit resolution can support fine amplitude measurement, while the single 5 V operation aligns with many analog receiver boards. The designer must still account for anti-alias filtering, acquisition timing, input impedance, and the difference between nominal resolution and system noise performance. Because no current replacement was verified as drop-in compatible, production receiver platforms should plan for a deliberate interface review.
推荐
Data-Acquisition Card
The AD977CN is suited to a legacy data-acquisition card requiring a 16-bit ADC at 100 kSPS and a through-hole DIP footprint. It can be paired with a controller or DSP that accepts the converter's documented output interface, clocks the conversion process, and transfers results through a parallel or serial peripheral. The verified sources identify the device as a one-input, one-SAR converter, so channel multiplexing, reference distribution, and input conditioning remain board-level responsibilities. The obsolete status should be addressed with a supply-chain and migration plan before field expansion.
推荐
Embedded Sensor Interface
For embedded sensor acquisition, AD977CN can convert a conditioned pressure, temperature, position, or level signal when the application values 16-bit resolution more than very high sample rate. The 100 kSPS throughput is ample for many slow sensors and control loops, and the documented input ranges provide a starting point for bipolar or unipolar front-end design. Power-down mode may help reduce consumption during idle periods, although exact control timing must be verified. A modern MCU-based acquisition path may be preferable for new safety- or longevity-sensitive products.
推荐
Test and Measurement Equipment
AD977CN can serve as the conversion element in legacy test and measurement equipment that needs accurate, repeatable digitizing rather than maximum throughput. A clean reference, low-noise reference buffer, controlled input impedance, and well-defined acquisition interval are necessary to turn the 16-bit rating into useful system accuracy. The 20-pin DIP format is particularly convenient for repair and prototype boards, and the 5 V supply matches many analog test fixtures. Engineers should verify electrical limits and pinout from the exact manufacturer datasheet because several detailed parameters are absent from the supplied verified web data.
推荐
推荐产品汇总
工程参考数据： AD977CN ——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 | AD977AN | AD977 | AD977AR | AD977ARZ | AD977A |
|---|---|---|---|---|---|---|
| Package | 20-pin DIP | 20-pin DIP - same package family, verify suffix | 20-pin DIP - same family, verify ordering code | 20-pin DIP - same family, verify suffix | 20-pin DIP - same family, verify suffix | 20-pin DIP - same family, verify suffix |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Converter Architecture | 16-bit SAR ADC | AD977 family SAR ADC | AD977 family SAR ADC | AD977A family SAR ADC | AD977A family SAR ADC | AD977A family SAR ADC |
| Resolution | 16 bit | 16 bit family rating | 16 bit family rating | 16 bit family rating | 16 bit family rating | 16 bit family rating |
| Throughput Rate | 100 kSPS | 200 kSPS AD977A class | 100 kSPS AD977 class | 200 kSPS AD977A class | 200 kSPS AD977A class | 200 kSPS |
| Supply Voltage | Single 5 V | Single 5 V family operation | Single 5 V family operation | Single 5 V family operation | Single 5 V family operation | Single 5 V family operation |
| Input Ranges | Unipolar 5 V, 4 V; bipolar 5 V, 3.3 V | AD977A family ranges - verify exact configuration | AD977 family ranges - verify exact configuration | AD977A family ranges - verify exact configuration | AD977A family ranges - verify exact configuration | AD977A family ranges - verify exact configuration |
关键差异点
- AD977CN is the 100 kSPS member rather than the 200 kSPS AD977A variant. （对比 AD977A)
- AD977CN uses a legacy 20-pin through-hole DIP format. （对比 AD977A)
- AD977CN combines 16-bit conversion with a documented single 5 V supply architecture. （对比 AD977)
设计说明
Keep the AD977CN analog supply and return paths short, and place the required bypass network close to the 5 V supply pins. The verified family specification states single 5 V operation, but the exact capacitor recommendations and allowable supply tolerance must be taken from the manufacturer datasheet. Estimated: if the converter dissipates the listed 100 mW maximum, a first-order heat check should compare that dissipation with the package and board thermal limits before operation in a sealed enclosure.
Route the analog input and reference nets away from digital clocks, serial data lines, and switching supplies. Because the AD977CN is a 16-bit SAR ADC, source impedance and acquisition timing can affect usable conversion accuracy even when the nominal resolution is 16 bits. Use a defined ground-return strategy, keep the input path compact, and verify the input-driver settling time against the selected 100 kSPS conversion sequence using the datasheet timing diagrams.
Use anti-alias filtering before the AD977CN input and provide a stable reference network with low noise and adequate decoupling. The verified data lists unipolar 5 V and 4 V ranges and bipolar 5 V and 3.3 V ranges, but it does not provide the full INL, DNL, SNR, ENOB, or reference specifications. Treat those missing values as design inputs to obtain, not as interchangeable defaults, and characterize the complete analog chain with the actual source impedance and sampling clock.
Do not substitute AD977A or an AD977 suffix variant solely because the family name is similar. The verified manufacturer description distinguishes 100 kSPS for AD977 from 200 kSPS for AD977A, and a correct PCB replacement also requires matching package, pinout, input configuration, interface timing, and supply requirements. Because AD977CN is listed as obsolete, review the exact ordering code and obtain a manufacturer or authorized-distributor compatibility statement before approving a drop-in substitution.
合规信息
The supplied verified data does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for AD977CN. The lifecycle status is recorded as obsolete because that status appears in a verified distributor-style listing; no additional compliance qualification is inferred.
