AD9768JQ - 8-Bit 100 MSPS ECL DAC | Analog Devices
料号： AD9768JQ ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $15.2202 | $15.22 |
| 10 | $15.2202 | $152.20 |
| 100 | $15.2202 | $1,522.02 |
| 500 | $15.2202 | $7,610.10 |
| 1,000 | $15.2202 | $15,220.20 |
AD9768JQ 概述
A DAC is a data-acquisition and signal-generation component that converts parallel digital codes into proportional current or voltage. The AD9768 belongs to the converter hierarchy: digital-to-analog converter, current-output DAC, data converter, and semiconductor IC. Its current-output architecture is useful when the downstream circuit requires a high-speed current-to-voltage conversion stage or direct current-domain signal processing.
The AD9768 provides 8-bit resolution and supports update rates as high as 100 MSPS. Its ECL-level digital interface is designed for high-speed systems, while the multiplying capability allows the DAC to be used in signal-generation, modulation, waveform-shaping, and feedback applications. The low-glitch architecture highlighted by the manufacturer is relevant to reducing unwanted transient energy during digital-code transitions, although exact glitch specifications require the complete AD9768 datasheet.
Typical circuit use places the converter between an 8-bit digital source and a current-to-voltage or load network. Because the output is current-based, external analog circuitry, impedance matching, and careful grounding strongly influence signal quality. The manufacturer describes operation as a standard DAC or as a two-quadrant multiplying DAC, giving designers flexibility for both ordinary waveform generation and multiplier-style signal paths.
When designing a board around the AD9768JQ, verify the exact pinout, supply requirements, input logic levels, output compliance, and timing margins from the AD9768 datasheet. The 18-pin CERDIP package is not interchangeable with a surface-mount DAC without a deliberate PCB redesign. The verified distributor result identifies the package as 18-CERDIP, while other electrical values not present in the supplied data are intentionally not guessed.
直接替换替代料： AD9768JQ ——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：
AD9768JQ 最大额定值与电气特性
| 功能 | Current-output digital-to-analog converter |
| 分辨率 | 8 bit |
| Maximum Update Rate | 100 MSPS |
| Digital Input Logic | ECL-level |
| Multiplying Operation | Two-quadrant multiplying DAC |
| Maximum Multiplying Bandwidth | 40 MHz |
| Digital Input Transition Time | 5 ns |
| 输出类型 | Current output |
| 封装 | 18-pin CERDIP |
| 安装类型 | Through-hole |
| Converter Category | Digital-to-analog converter |
| Input Interface | 8-bit parallel digital input |
| Multiplying Capability | Two-quadrant multiplication |
| Maximum Analog Update Rate | 100 MSPS |
| Manufacturer | Analog Devices |
| Verified Distributor Price | From $15.2202 as of 2026-10-23 |
AD9768JQ 18-pin cerdip 引脚配置指南
AD9768JQ（18-pin cerdip 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： AD9768JQ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD9768JQ 适用于 6 应用s: High-Speed Digital Waveform Generation, Two-Quadrant Analog Multiplication, Communications Test Equipment, Industrial Feedback and Control Loops, Pulse and Transient Signal Generation, Digital-to-Analog Loopback Systems.
High-Speed Digital Waveform Generation
AD9768JQ fits high-speed waveform generation because it accepts 8-bit ECL-level digital data and converts codes at update rates up to 100 MSPS. Place the converter between a parallel digital source and an external current-to-voltage network to produce an analog test or control waveform. The useful design trade-off is that the high update rate supports wide-band signals, while the current output requires carefully selected impedance and termination to control amplitude, compliance, and edge response.
推荐
Two-Quadrant Analog Multiplication
AD9768JQ is suitable for two-quadrant multiplying-DAC applications because Analog Devices specifies this operating mode with bandwidth up to 40 MHz. In a multiplier circuit, the digital code and an analog control signal combine to produce a scaled output, which can support modulation, gain control, or waveform shaping. The external current-output network and analog control path must preserve the specified compliance and impedance conditions, and the layout should minimize parasitic capacitance around the high-speed output.
推荐
Communications Test Equipment
AD9768JQ can support communications test equipment that needs an 8-bit, high-update-rate analog source. The 100 MSPS capability provides temporal headroom for generating test patterns, transient waveforms, and modulated analogs when the external output network has sufficient bandwidth. Its ECL-level interface fits systems designed around high-speed digital logic, although a designer must verify logic thresholds and timing from the AD9768 datasheet rather than treating the interface as ordinary CMOS.
推荐
Industrial Feedback and Control Loops
AD9768JQ may be used in specialized industrial feedback or control systems where a digital command must become an analog excitation or reference. The two-quadrant multiplying capability can make the converter useful when the output must respond to both a digital code and an analog control quantity. For reliable operation, evaluate output settling, load impedance, thermal conditions, and isolation between the high-speed converter and sensitive control circuitry; the verified data does not specify industrial temperature or qualification grades.
推荐
Pulse and Transient Signal Generation
AD9768JQ is appropriate for pulse, edge, and transient generation where the 100 MSPS update rate is useful and an 8-bit amplitude resolution is acceptable. The current-output architecture can be coupled to a precision resistor or active transimpedance stage to establish the required voltage range. Keep the output path short, provide stable return paths, and validate transient settling with the actual load because package, connector, and PCB parasitics can limit usable bandwidth.
推荐
Digital-to-Analog Loopback Systems
AD9768JQ can serve as the DAC element in a digital-to-analog and analog-to-digital loopback test path. Its 8-bit input and high update rate make it useful for exercising conversion bandwidth, digital timing, and analog reconstruction in a controlled system. When pairing it with a high-speed ADC, align clocking and account for converter and acquisition latency; the supplied data does not confirm a specific matching ADC or guaranteed end-to-end latency.
推荐
推荐产品汇总
工程参考数据： AD9768JQ ——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 | AD9768JQ |
|---|---|---|
| Package | 18-pin CERDIP | 18-pin CERDIP |
| Brand | Analog Devices | Analog Devices |
| Resolution | 8 bit | 8 bit |
| Maximum Update Rate | 100 MSPS | 100 MSPS |
| Digital Input Logic | ECL-level | ECL-level |
| Output Type | Current output | Current output |
| Multiplying Mode | Two-quadrant multiplying DAC | Two-quadrant multiplying DAC |
| Multiplying Bandwidth | 40 MHz | 40 MHz |
| Verified Price | From $15.2202 as of 2026-10-23 | From $15.2202 as of 2026-10-23 |
关键差异点
- High-speed 8-bit current-output conversion （对比 AD9768JQ)
- Two-quadrant multiplying operation （对比 AD9768JQ)
- ECL-level digital interface （对比 AD9768JQ)
设计说明
Treat the AD9768 output as a high-speed current-output node. Keep the DAC-to-I/V or load connection short, use a controlled return path, and minimize parasitic capacitance and inductance. Place any input or output termination according to the complete Analog Devices datasheet and the actual transmission-line environment; do not infer ECL termination or output impedance from distributor summaries.
Use an 18-pin CERDIP-compatible through-hole footprint and verify every pad assignment against the official AD9768 pinout before layout release. Separate sensitive analog routing from high-speed digital input routing where practical, maintain continuous ground-plane return paths, and place decoupling and termination components close to their associated pins. The verified data confirms the package but does not provide a complete PCB pin table.
Do not assume that any 8-bit DAC is a drop-in replacement. AD9768JQ requires the same logic family, package, pin assignment, output architecture, and operating performance to be evaluated. Before purchasing a substitute, compare the 100 MSPS update rate, 40 MHz multiplying bandwidth, ECL input thresholds, current-output compliance, supply requirements, and timing specifications. The supplied cross-reference data identifies no confirmed replacement.
The external analog network determines how current output becomes a usable voltage, so resistor tolerance, amplifier input capacitance, and load impedance directly affect amplitude accuracy and bandwidth. Confirm the converter's output compliance and settling specifications from the manufacturer datasheet, then include connector and PCB capacitance in the bandwidth budget. Do not select resistor or capacitor values from unverified assumptions.
合规信息
The verified distributor result describes AD9768JQ as a RoHS electronic part, but the supplied manufacturer product-page snippet does not provide explicit RoHS, REACH, halogen-free, or conflict-minerals declarations. Compliance fields are therefore retained as unknown where explicit evidence is unavailable.
