ADS1213U - 22-Bit, 6.25 kSPS Delta-Sigma ADC | Texas Instruments
MPN： ADS1213U ✓ 啟用中ADS1213U 概覽
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.
直接替換替代品，適用於 ADS1213U — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADS1213U （相同外形與佔位） — 差異在於 Mounting Type, Programmable Gain Amplifier, Resolution.
ADS1213U/1K
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1213U 最大額定值與電氣特性
| 解析度 | 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 |
| 供應電壓 | +5 V single supply |
| Power Consumption | 1.4 mW |
| 封裝 | 24-pin SOIC |
| 安裝類型 | Surface mount |
| Tube Packaging | Tube |
ADS1213U 24-pin soic 腳位配置指南
ADS1213U（24-pin soic 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： ADS1213U.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADS1213U 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ADS1213U — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Integrated multi-channel precision signal chain (對比ADS1213U/1K)
- Resolution maintained across useful speed points (對比ADS1213U/1K)
- Reduced external analog conditioning (對比ADS1213U/1K)
設計說明
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.
合規資訊
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.
