ADS7800KU/1K - 12-Bit 333kSPS SAR ADC | Texas Instruments
料号： ADS7800KU/1K ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.8 | $980.00 |
| 500 | $8.5 | $4,250.00 |
| 1,000 | $7.2 | $7,200.00 |
ADS7800KU/1K 概述
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital numbers, enabling digital processing of real-world signals. The ADS7800 is a SAR-type ADC, which uses a binary search algorithm to determine the digital output, offering a good balance of speed, resolution, and power consumption. SAR ADCs are widely used in data acquisition systems, industrial control, and medical instrumentation where moderate speed and high accuracy are required.
Key features of the ADS7800KU/1K include 12-bit resolution, 333k samples per second, standard ±10V and ±5V input ranges, and DC performance suitable for precision applications. The device is available in a 24-pin SOIC package, which is suitable for surface-mount assembly. It operates over the commercial temperature range of 0°C to +70°C, making it suitable for most industrial and consumer applications.
The ADS7800 uses state-of-the-art CMOS structures, providing low power consumption and high reliability. It includes an internal sample-and-hold circuit, eliminating the need for external track-and-hold components. The digital interface supports microprocessor control with three-state output drivers, allowing easy connection to digital buses. The device also features a conversion time of 2.7 µs, enabling high-speed data acquisition.
Typical applications for the ADS7800KU/1K include industrial control systems, medical instrumentation, and automotive systems requiring precise signal processing. Its high sampling rate and 12-bit resolution make it suitable for applications such as motor control, power monitoring, and data acquisition systems. The device's standard input ranges simplify interface with sensors and transducers.
When designing with the ADS7800KU/1K, ensure proper decoupling of the power supplies and reference to achieve optimal performance. The device requires a +5V supply and a negative supply (-12V or -15V), which should be well-regulated and filtered. The analog input should be driven with a low-impedance source to avoid sampling errors.
直接替换替代料： ADS7800KU/1K ——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： ADS7800KU/1K （相同外形与封装尺寸） ——差异在于 Architecture, Input Type, Operating Temperature Range, Package, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
ADS7800KU
✅ 直接替换📋 参考替代料（不在目录中）
ADS7800U
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADS7800KU/1K 最大额定值与电气特性
| 分辨率 | 12 bit |
| 采样率 | 333 kSPS |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| 输入电压范围 | ±10V, ±5V |
| Architecture | SAR |
| Conversion Time | 2.7 µs |
| Supply Voltage - Positive | +5V |
| Supply Voltage - Negative | -12V or -15V |
| 工作温度范围 | 0°C to +70°C |
| 封装 | 24-SOIC |
| 安装类型 | Surface Mount |
| Terminal Form | Gull Wing |
| Number of Terminals | 24 |
| RoHS 状态 | Compliant |
ADS7800KU/1K 引脚配置
| 引脚 1 | VANA — Analog positive supply (+5V) |
| 引脚 2 | VIN — Analog input |
| 引脚 3 | VREF — Reference input/output |
| 引脚 4 | AGND — Analog ground |
| 引脚 5 | VEE — Negative supply (-12V or -15V) |
| 引脚 6 | CAP — Internal reference bypass |
| 引脚 7 | CLK — Clock input |
| 引脚 8 | CS — Chip select (active low) |
| 引脚 9 | RD — Read (active low) |
| 引脚 10 | BUSY — Busy output |
| 引脚 11 | DB0 — Data bit 0 (LSB) |
| 引脚 12 | DB1 — Data bit 1 |
| 引脚 13 | DB2 — Data bit 2 |
| 引脚 14 | DB3 — Data bit 3 |
| 引脚 15 | DB4 — Data bit 4 |
| 引脚 16 | DB5 — Data bit 5 |
| 引脚 17 | DB6 — Data bit 6 |
| 引脚 18 | DB7 — Data bit 7 |
| 引脚 19 | DB8 — Data bit 8 |
| 引脚 20 | DB9 — Data bit 9 |
| 引脚 21 | DB10 — Data bit 10 |
| 引脚 22 | DB11 — Data bit 11 (MSB) |
| 引脚 23 | DGND — Digital ground |
| 引脚 24 | VDIG — Digital positive supply (+5V) |
典型应用
ADS7800KU/1K 适用于 6 应用s: Industrial Control Systems, Medical Instrumentation, Automotive Systems, Data Acquisition Systems, Power Monitoring, Test and Measurement.
Industrial Control Systems
The ADS7800KU/1K is ideal for industrial control systems due to its 12-bit resolution and 333 kSPS sampling rate. It can digitize analog signals from sensors and transducers with standard ±10V ranges, enabling precise monitoring and control of motors, valves, and process variables. Its fast conversion time of 2.7 µs allows real-time feedback loops, while the internal sample-and-hold simplifies the analog front-end. The device operates from a +5V supply and a negative supply, making it compatible with common industrial power rails. Its commercial temperature range (0°C to +70°C) suits most factory environments. The parallel digital interface with three-state outputs facilitates easy connection to microcontrollers and DSPs, reducing design complexity.
推荐
Medical Instrumentation
In medical instrumentation, the ADS7800KU/1K provides high-resolution digitization of physiological signals such as ECG, EEG, and blood pressure. Its 12-bit resolution ensures accurate representation of small signal variations, while the 333 kSPS sampling rate captures fast transients. The standard ±5V input range is compatible with many medical sensor outputs. The device's low power consumption and small SOIC package make it suitable for portable and implantable devices. The internal reference and clock reduce external component count, enhancing reliability. The commercial temperature range is adequate for clinical environments. The parallel interface allows direct connection to medical-grade microcontrollers, enabling real-time monitoring and diagnostics.
推荐
Automotive Systems
The ADS7800KU/1K is used in automotive systems for applications such as battery monitoring, motor control, and sensor data acquisition. Its 12-bit resolution and 333 kSPS sampling rate enable accurate measurement of voltage, current, and temperature. The standard ±10V input range is compatible with automotive battery voltages and sensor outputs. The device operates from a +5V supply, which is common in automotive electronics, and the negative supply can be derived from a -12V rail. The commercial temperature range (0°C to +70°C) is suitable for passenger cabin applications, but not for under-hood environments. The parallel interface simplifies integration with automotive microcontrollers. Its robust CMOS design ensures reliable operation in noisy automotive environments.
推荐
Data Acquisition Systems
The ADS7800KU/1K is a core component in data acquisition systems, providing high-speed, high-resolution digitization of multiple analog channels. Its 333 kSPS sampling rate allows multiplexing of several input channels while maintaining adequate per-channel bandwidth. The 12-bit resolution ensures good dynamic range for most measurement applications. The standard ±10V and ±5V input ranges accommodate a wide variety of sensors and transducers. The internal sample-and-hold and reference simplify the analog front-end, reducing component count and board space. The parallel interface with three-state outputs enables easy connection to data acquisition cards and microcontrollers. The device's low power consumption is beneficial for portable data loggers.
推荐
Power Monitoring
The ADS7800KU/1K is well-suited for power monitoring applications, such as measuring voltage and current in industrial power systems. Its 12-bit resolution and 333 kSPS sampling rate enable accurate measurement of AC and DC signals, including harmonics and transients. The standard ±10V input range can directly interface with voltage and current transducers. The device's fast conversion time allows real-time monitoring of power quality. The parallel interface facilitates connection to digital signal processors for advanced analysis. The commercial temperature range is adequate for indoor power monitoring equipment. The device's low power consumption is beneficial for energy-efficient designs.
推荐
Test and Measurement
In test and measurement equipment, the ADS7800KU/1K provides high-speed, high-resolution digitization for oscilloscopes, data loggers, and spectrum analyzers. Its 333 kSPS sampling rate captures fast waveforms, while 12-bit resolution ensures accurate amplitude measurement. The standard ±10V input range is compatible with many test signals. The device's internal sample-and-hold and reference reduce external component count, simplifying design. The parallel interface allows high-speed data transfer to FPGAs or DSPs for real-time processing. The commercial temperature range is suitable for benchtop instruments. The device's low power consumption is beneficial for portable test equipment.
推荐
推荐产品汇总
工程参考数据： ADS7800KU/1K ——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 | ADS7800KU | ADS7800KP | ADS7800U | AD1671 |
|---|---|---|---|---|---|
| Package | 24-SOIC | 24-SOIC | 24-PDIP | 24-SOIC | 28-PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 333 kSPS | 333 kSPS | 333 kSPS | 333 kSPS | 1 MSPS |
| Input Voltage Range | ±10V, ±5V | ±10V, ±5V | ±10V, ±5V | ±10V, ±5V | ±5V, ±10V |
| Conversion Time | 2.7 µs | 2.7 µs | 2.7 µs | 2.7 µs | 1 µs |
| Operating Temperature Range | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C |
| Supply Voltage | +5V, -12V/-15V | +5V, -12V/-15V | +5V, -12V/-15V | +5V, -12V/-15V | +5V, -12V/-15V |
关键差异点
- Same die and package as ADS7800KU, but with tape and reel packaging for automated assembly （对比 ADS7800KU)
- Higher sampling rate than many competing 12-bit ADCs （对比 AD1671)
- Standard ±10V and ±5V input ranges simplify interface （对比 AD1671)
设计说明
The ADS7800KU/1K requires a +5V supply and a negative supply (-12V or -15V). Ensure these supplies are well-regulated and filtered to minimize noise. Use 0.1µF ceramic capacitors close to the VANA and VDIG pins, and a 10µF tantalum capacitor for bulk decoupling. The negative supply should also be decoupled with a 0.1µF capacitor to ground.
For optimal performance, separate analog and digital ground planes and connect them at a single point near the ADC. Place the analog input traces away from digital traces to avoid coupling. Use a ground plane under the ADC to reduce noise. Keep the reference bypass capacitor (CAP pin) close to the device and connect it to analog ground.
Ensure the analog input source impedance is low enough to drive the ADC's sample-and-hold without significant settling errors. A buffer amplifier may be required. Also, avoid exceeding the absolute maximum ratings on the input pins. The reference voltage should be stable and accurate; consider using an external precision reference if higher accuracy is needed.
合规信息
RoHS compliant per distributor listings. Not AEC-Q100 qualified. Lead-free per RoHS compliance.
