ADS1274IPAPT - 24-Bit 144kSPS Quad Delta-Sigma ADC | Texas Instruments
MPN： ADS1274IPAPT ✓ 啟用中ADS1274IPAPT 概覽
A delta-sigma ADC is a type of oversampling converter that uses a high-frequency modulator followed by digital filtering to achieve very high resolution. The ADS1274 belongs to the wider category of precision ADCs, which sit in the signal chain hierarchy of analog front end -> analog-to-digital conversion -> digital processing. It is specifically optimized for applications that demand both wide bandwidth and excellent DC stability, two characteristics that are traditionally mutually exclusive in sigma-delta designs.
Key features include four simultaneously-sampled differential inputs, selectable operating modes (High-Resolution, Low-Power, High-Speed, and Audio), a flexible serial interface (SPI-compatible or frame-sync), and an internal PLL for clock generation from an external reference. The wideband digital filter delivers low passband droop, eliminating the need for post-equalization in frequency-sensitive applications such as vibration analysis.
Architecturally, the ADS1274 employs a 4th-order chopper-stabilized modulator per channel with proprietary decimation filtering. This design eliminates the traditional trade-off between DC precision (low drift, high DC CMRR) and AC performance (wide bandwidth, flat passband), making the part suitable for multisensor systems where each channel must accurately capture both static and dynamic signals without per-channel calibration.
Typical applications include industrial vibration monitoring, condition monitoring of rotating machinery, seismic data acquisition, multi-channel data loggers, audio test equipment, and power-quality analyzers. The simultaneous sampling architecture preserves phase relationships between channels, which is critical for modal analysis in structural health monitoring.
When designing with the ADS1274IPAPT, pay attention to PCB layout: the exposed thermal pad must be soldered to a ground plane with multiple thermal vias to dissipate heat from the digital core, and the analog supply (AVDD) should be heavily decoupled with separate 10 uF bulk and 100 nF ceramic capacitors close to the pin. Use a low-jitter master clock for best noise performance at maximum data rate.
This page synthesizes distributor pricing, parametric comparison tables, drop-in alternatives, and practical design notes not found on the standalone TI datasheet, helping engineers shorten the selection and qualification cycle for high-channel-count precision acquisition systems.
直接替換替代品，適用於 ADS1274IPAPT — 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： ADS1274IPAPT （相同外形與佔位） — 差異在於 Number of Channels, Package, Resolution.
ADS1274IPAPR
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1274IPAPTG4
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1274IPAP
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1278IPAP
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1278IPAPR
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1274IPAPT 最大額定值與電氣特性
| 解析度 | 24 bits |
| Number of Channels | 4 |
| Sampling Architecture | Simultaneous sampling, 4th-order delta-sigma modulator |
| Maximum Data Rate (per channel) | 144 kSPS |
| Minimum Data Rate | 105 kSPS (High-Speed mode) |
| SNR (High-Resolution mode) | 111 dB |
| THD | -108 dB |
| Usable Bandwidth | 62 kHz |
| Offset Drift | 0.8 uV/°C |
| Analog Supply Voltage (AVDD) | +5 V (typical) |
| Digital Supply Voltage (DVDD) | 1.8 V to 3.3 V |
| Analog Input Range | Differential, Vref = 2.5 V |
| 工作溫度範圍 | -40 °C to +125 °C |
| 封裝 | HTQFP-64 (PAP), 10 mm x 10 mm with exposed pad |
| 安裝類型 | Surface Mount |
| MSL (Moisture Sensitivity Level) | MSL3 |
| RoHS 狀態 | Compliant |
ADS1274IPAPT htqfp-64 (pap), 10 mm x 10 mm with exposed pad 腳位配置指南
ADS1274IPAPT（htqfp-64 (pap), 10 mm x 10 mm with exposed pad 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： ADS1274IPAPT.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADS1274IPAPT 適用於 6 應用s: Industrial Vibration Monitoring, Seismic Data Acquisition, Audio Test & Measurement, Power Quality Analyzers, Multi-Channel Data Logger, Structural Health Monitoring.
Industrial Vibration Monitoring
The ADS1274IPAPT's 4 simultaneous-sampled channels and 62 kHz bandwidth make it ideal for multi-axis IEPE accelerometer-based vibration monitoring on motors, pumps, bearings, and gearboxes. Its 0.8 uV/°C offset drift ensures DC-stable baseline readings, while -108 dB THD preserves the integrity of harmonic signatures used in FFT-based fault diagnosis. Designers typically pair the part with OPA1612 op-amps for the analog front end and feed the serial output to a DSP for envelope analysis.
推薦
Seismic Data Acquisition
For seismic exploration, the ADS1274IPAPT provides 111 dB SNR and 24-bit resolution that captures weak broadband signals down to sub-Hz frequencies. The 4-channel simultaneous sampling preserves the phase relationships between geophone strings, enabling accurate velocity modeling. Its low noise floor across the DC-to-62 kHz band removes the need for separate DC precision and AC bandwidth paths, simplifying the field acquisition module.
推薦
Audio Test & Measurement
The -108 dB THD and 111 dB SNR position the ADS1274IPAPT for high-fidelity audio analyzers and production-line headphone/speaker testers. Audio mode delivers optimum dynamic range across the 20 Hz to 20 kHz band, while the wide flat passband avoids the sinc droop that would otherwise require post-equalization. Engineers use the four channels for stereo-plus-monitor or 4-wire measurement of differential speaker loads.
推薦
Power Quality Analyzers
The 144 kSPS data rate and 62 kHz bandwidth capture harmonics up to the 50th order of a 50/60 Hz fundamental, meeting IEC 61000-4-7 power-quality instrument requirements. Simultaneous sampling of voltage and current channels preserves the phase angle needed for accurate active/reactive power computation. Low 0.8 uV/°C drift eliminates temperature-induced calibration drift in field-deployed PQ meters.
推薦
Multi-Channel Data Logger
For thermocouple, strain-gauge, or load-cell data loggers with 4 channels, the ADS1274IPAPT provides industrial-grade DC accuracy plus enough bandwidth for transient capture. Simultaneous sampling eliminates the inter-channel skew that plagues multiplexed ADCs in waveform recording. The exposed-pad HTQFP-64 package simplifies thermal management in compact IP65 enclosures used in factory floor installations.
推薦
Structural Health Monitoring
The ADS1274IPAPT is widely used in bridge, building, and aircraft structural health monitoring systems where multiple strain gauges and accelerometers must be sampled simultaneously to capture dynamic structural responses. With 0.8 uV/°C drift and 111 dB SNR, it preserves the precision required for modal-frequency tracking over months of unattended operation. The wide operating temperature range supports outdoor and harsh-environment deployments.
推薦
推薦產品摘要
工程參考資料，適用於 ADS1274IPAPT — 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 | ADS1274IPAPR | ADS1274IPAPTG4 | ADS1274IPAP | ADS1278IPAP | ADS1278IPAPR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | HTQFP-64 (PAP) 10x10 mm | HTQFP-64 (PAP) 10x10 mm - same | HTQFP-64 (PAP) 10x10 mm - same | HTQFP-64 (PAP) 10x10 mm - same | HTQFP-64 (PAP) 10x10 mm - same | HTQFP-64 (PAP) 10x10 mm - same |
| Resolution | 24 bits | 24 bits | 24 bits | 24 bits | 24 bits | 24 bits |
| Number of Channels | 4 | 4 | 4 | 4 | 8 | 8 |
| Max Data Rate | 144 kSPS | 144 kSPS | 144 kSPS | 144 kSPS | 144 kSPS | 144 kSPS |
| SNR (High-Res mode) | 111 dB | 111 dB | 111 dB | 111 dB | 111 dB | 111 dB |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
| Packaging Format | Tape & Reel, 250 pcs | Tape & Reel, 1000 pcs | Tape & Reel, 250 pcs | Tray | Tape & Reel, 250 pcs | Tape & Reel, 1000 pcs |
| RoHS | Compliant | Compliant | Compliant (green) | Compliant | Compliant | Compliant |
主要差異化特點
- Highest channel-count simultaneous sampling in TI's 24-bit ADC portfolio (對比ADS1258 (16-channel multiplexed))
- Wide flat passband without sinc droop (對比ADS1174 (16-bit predecessor))
- Same package as ADS1278 for scalable designs (對比Discrete multi-ADC solutions)
設計說明
The exposed thermal pad on the PAP package must be soldered to a top-layer ground pour with multiple thermal vias (typically 9 to 16, 0.3 mm drill) to a continuous ground plane below. This serves both as the chip's primary ground connection and as the heat dissipation path for the 280 mW internal dissipation at full data rate. Without adequate thermal vias the junction can rise beyond the 125 °C rating in sealed enclosures.
Use separate AVDD (5 V analog) and DVDD (1.8 V to 3.3 V digital) regulators. Place a 10 uF X7R bulk and 100 nF NP0/C0G ceramic on each AVDD pin, located within 2 mm of the pin. Add a ferrite bead or 10 ohm resistor between AVDD and DVDD grounds to prevent digital return currents from corrupting the analog ground reference. Low-noise LDOs such as the TPS7A4701 are recommended for AVDD.
Route the four differential analog input pairs as tightly coupled, length-matched traces on the top layer with a continuous ground plane beneath. The input common-mode voltage is set by the VBIAS pin and should be heavily bypassed. Keep analog and digital traces separated by at least 3 mm and avoid routing the serial digital output (DOUT) directly above the analog input traces to prevent digital-to-analog coupling.
Operating mode (High-Resolution, Low-Power, High-Speed, Audio) is latched at power-up via the FORMAT/SPEED pins; it cannot be changed at runtime without a reset. Choosing the wrong mode for your bandwidth/noise/power budget forces a board rework. Also note that the maximum clock frequency of 32.768 MHz corresponds to 144 kSPS in High-Speed mode; using a lower-frequency crystal in High-Resolution mode reduces data rate accordingly.
合規資訊
RoHS and REACH compliant per TI product page. G4 suffix variants (e.g. ADS1274IPAPTG4) specifically designate green/RoHS-only lead finish. Not AEC-Q100 qualified - choose ADS1274-Q1 suffix for automotive.
