ADS1213U - 22-Bit, 6.25 kSPS Delta-Sigma ADC | Texas Instruments
料号： ADS1213U ✓ 量产中ADS1213U 概述
A delta-sigma ADC is a signal-conversion IC that uses oversampling, digital filtering, and noise shaping to exchange conversion speed for high resolution and noise performance. The ADS1213U belongs to the ADC/DAC category within the broader data-converter and signal-processing hierarchy. Its architecture is intended for low-bandwidth industrial signals where 22-bit nominal resolution can improve measurement fidelity without requiring a high-speed successive-approximation ADC.
Key features include 22-bit conversion resolution, a maximum data rate of 6.25 kSPS, differential inputs, a programmable gain amplifier, an internal voltage reference, and a flexible synchronous serial interface. The verified data also identifies 20-bit effective resolution at 10 Hz and 16-bit effective resolution at 1000 Hz. Operation from a single +5 V supply and a stated low-power figure of 1.4 mW align the device with embedded measurement systems that must balance precision, conversion speed, and energy use.
The integrated four-channel input multiplexer supports analog-front-end designs that would otherwise require external analog switching. The programmable gain stage can condition low-level sensor outputs before conversion, while the delta-sigma conversion path suppresses out-of-band noise. The SPI-compatible SSI interface and two-wire control mode described by Texas Instruments simplify host communication and can reduce isolated-system implementation complexity when appropriately designed.
Typical uses include pressure and temperature transmitters, industrial process monitoring, strain-gauge and bridge-sensor acquisition, laboratory instrumentation, and low-speed data loggers. Its 6.25 kSPS maximum rate favors continuous sensor monitoring rather than waveform capture or high-speed motor-control feedback. Systems requiring several channels can also multiplex analog inputs around the converter while retaining programmable gain and synchronized serial output.
Designers should account for the conversion-time penalty associated with delta-sigma filtering, verify the input common-mode range at every programmable-gain setting, and follow the manufacturer’s reference layout and decoupling recommendations. The integrated reference and programmable gain simplify the analog front end, but sensor excitation, protection, grounding, and digital-interface isolation still require careful implementation.
This page consolidates verified manufacturer and distributor details, practical application guidance, parameter comparisons, and drop-in replacement information. It also distinguishes the verified ADS1213U from ordering-code or package variants that are not confirmed as pin-compatible substitutes.
直接替换替代料： ADS1213U ——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： ADS1213U （相同外形与封装尺寸） ——差异在于 Mounting Type, Programmable Gain Amplifier, Resolution.
ADS1213U/1K
✅ 直接替换📋 参考替代料（不在目录中）
ADS1213U 最大额定值与电气特性
| 分辨率 | 22 bit |
| Maximum Conversion Rate | 6.25 kSPS |
| Analog Input Channels | 8 channels |
| Input Multiplexer | 4 differential or 8 single-ended inputs |
| Conversion Architecture | Delta-sigma ADC |
| Effective Resolution at 10 Hz | 20 bit |
| Effective Resolution at 1000 Hz | 16 bit |
| Input Type | Differential |
| Programmable Gain Amplifier | Programmable |
| Voltage Reference | Integrated VREF |
| Digital Interface | SPI-compatible synchronous serial interface |
| Control Interface Modes | SPI-compatible SSI and two-wire control mode |
| 电源电压 | +5 V single supply |
| Power Consumption | 1.4 mW |
| 封装 | 24-pin SOIC |
| 安装类型 | Surface mount |
| Tube Packaging | Tube |
ADS1213U 24-pin soic 引脚配置指南
ADS1213U（24-pin soic 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： ADS1213U.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADS1213U 适用于 6 应用s: Industrial Pressure and Process Monitoring, Load Cell and Strain Gauge Acquisition, Temperature and Thermocouple Instrumentation, Battery-Powered Environmental Sensors, Laboratory and Test Instrumentation, Remote Sensor and Telemetry Nodes.
Industrial Pressure and Process Monitoring
The ADS1213U fits low-speed pressure transmitter and process-monitoring systems because it combines 22-bit nominal resolution with differential inputs, programmable gain, and a 6.25 kSPS maximum conversion rate. A bridge sensor can be connected through the input multiplexer, allowing the converter to acquire several scaled channels rather than requiring a separate ADC for every measurement point. Its integrated VREF and PGA simplify the signal chain, while the 20-bit effective resolution at 10 Hz is useful when filtering heavy sensor noise. The main design trade-off is conversion latency: delta-sigma digital filtering improves rejection but is less suitable for rapidly changing events than a high-speed SAR ADC.
推荐
Load Cell and Strain Gauge Acquisition
The ADS1213U is appropriate for bridge-based load-cell and strain-gauge acquisition when low-level differential signals require gain and noise rejection. Its programmable gain stage supports conditioning close to the sensor, while the delta-sigma architecture filters out electrical noise that is not correlated with the excitation clock. The 6.25 kSPS ceiling permits continuous static-force measurement, and effective resolution is specified as 20 bits at 10 Hz and 16 bits at 1000 Hz, so filter and data-rate settings must match the mechanical bandwidth. Designers should still include input protection, low-noise excitation, proper guard-ring layout, and careful grounding around the bridge and converter.
推荐
Temperature and Thermocouple Instrumentation
The ADS1213U can support multichannel temperature instrumentation when the front end provides suitable cold-junction compensation, linearization, and input protection. Its 22-bit converter and programmable gain help preserve low-level thermocouple information, while the integrated four-channel differential multiplexer allows several conditioned sensor inputs to be measured sequentially. The relatively slow 6.25 kSPS maximum rate is advantageous because temperature usually changes far more slowly than the ADC’s conversion capability. The trade-off is that the device does not replace cold-junction and linearization circuitry, so total measurement accuracy also depends on reference stability, thermocouple wiring, thermal gradients, and calibration.
推荐
Battery-Powered Environmental Sensors
The ADS1213U suits environmental sensing nodes that periodically measure slow signals from resistive or ratiometric sensors. Its stated 1.4 mW power figure is useful when duty-cycling dominates the power budget, and the programmable gain can reduce the need for a separate analog conditioning stage. The integrated VREF and serial interface also reduce board area in compact instrumentation. However, the 6.25 kSPS rate may exceed what the final application requires, so selecting a suitable data rate and filtering strategy is essential. Battery life also depends on supply current outside the verified power figure, sensor excitation energy, and the time required to acquire each conversion.
推荐
Laboratory and Test Instrumentation
The ADS1213U is appropriate for laboratory instruments that acquire multiple low-level channels and require more resolution than a conventional 16-bit converter at moderate speed. The combination of differential inputs, programmable gain, an integrated reference, and a 22-bit delta-sigma conversion path is useful for bench measurement systems, data loggers, and automated calibration fixtures. Its SPI-compatible SSI interface allows a controller to retrieve digital filter results while the two-wire mode may simplify isolated implementations. Designers should account for calibration, input settling after multiplexer switching, reference accuracy, and the latency of digital decimation when specifying a test throughput.
推荐
Remote Sensor and Telemetry Nodes
The ADS1213U can serve as the measurement engine in a remote telemetry node that periodically reads several conditioned analog sensors. Its integrated multiplexer, VREF, and PGA reduce the analog component count, while the serial interface provides a straightforward connection to a communications controller. For low-bandwidth environmental, agricultural, or equipment-monitoring signals, 6.25 kSPS is more than adequate, and the converter’s noise filtering can reject interference outside the selected data-rate bandwidth. The key qualification is that each measurement cycle must allow for analog settling and delta-sigma conversion latency. Surge protection and grounding become especially important when the sensor wiring extends outside the enclosure.
推荐
推荐产品汇总
工程参考数据： ADS1213U ——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 | ADS1213U/1K |
|---|---|---|
| Package | 24-pin SOIC | 24-pin SOIC - same |
| Brand | Texas Instruments | Texas Instruments |
| Resolution | 22 bit | 22 bit |
| Maximum Conversion Rate | 6.25 kSPS | 6.25 kSPS |
| Analog Input Channels | 8 channels | 8 channels |
| Programmable Gain Amplifier | Programmable | Programmable |
| Power Consumption | 1.4 mW | 1.4 mW |
| Effective Resolution at 10 Hz | 20 bit | 20 bit |
| Effective Resolution at 1000 Hz | 16 bit | 16 bit |
| Verified Unit Price as of 2026-10-30 | $8.2174 | $8.2174 |
关键差异点
- Integrated multi-channel precision signal chain （对比 ADS1213U/1K)
- Resolution maintained across useful speed points （对比 ADS1213U/1K)
- Reduced external analog conditioning （对比 ADS1213U/1K)
设计说明
Follow the manufacturer’s analog layout recommendations and place input, reference, and bypass connections close to their corresponding pins. The delta-sigma converter and programmable front end are sensitive to copper noise and coupling from digital switching paths; keep the SPI clock and data routing away from high-impedance input traces. Where the complete layout data are unavailable, obtain the official pin and layout drawings from the TI ADS1213 product page before releasing the PCB rather than inferring placement from the package outline.
Allow both analog settling and delta-sigma conversion latency after changing the multiplexer selection. A 22-bit nominal result does not guarantee immediate 22-bit accuracy at the maximum 6.25 kSPS rate; effective resolution is listed as 20 bits at 10 Hz and 16 bits at 1000 Hz. Select the digital filter and data rate from the measured signal bandwidth, discard initial conversions after channel switching when required, and verify timing across the full SPI transaction sequence.
The verified 1.4 mW figure makes low-power operation plausible, but it should not be treated as complete system power without checking the operating mode, data rate, supply voltage, and digital interface state. In a duty-cycled sensor node, wake-up time, reference settling, conversion latency, and leakage can dominate energy consumption. Measure the complete acquisition cycle at the intended supply voltage and include sensor excitation and protection circuitry in the power budget.
Do not treat the ADS1213P or ADS1213E-family package options as direct substitutes for the ADS1213U SOIC footprint. The TI product details explicitly mention DIP-24, SO-24, and SSOP-28 ADS1213 options, showing that the ordering code determines mechanical compatibility. Also verify the input common-mode range at each PGA setting; high gain can restrict usable input range even when resolution and noise performance improve.
合规信息
The supplied snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim was inferred from the manufacturer or distributor listing.
