ADS1258-EP - 16-Channel 24-Bit ADC | Texas Instruments
MPN: ADS1258-EP ✓ نشطADS1258-EP نظرة عامة
An analog-to-digital converter (ADC) is a device that converts continuous analog signals into discrete digital numbers. The ADS1258-EP is a high-resolution, multiplexed ADC designed for precision measurement applications. It belongs to the family of delta-sigma ADCs, which use oversampling and noise shaping to achieve high resolution. In the hierarchy of data converters, it sits under the category of analog-to-digital converters, which are essential in mixed-signal systems for interfacing real-world analog signals with digital processing.
Key features of the ADS1258-EP include a flexible input multiplexer that accepts combinations of eight differential or 16 single-ended inputs, with a full-scale differential range of 5 V or true bipolar range of ±2.5 V. The device offers a 24-bit resolution with low noise, making it suitable for high-precision measurement. The enhanced product (EP) designation indicates a wider operating temperature range and higher reliability, as noted in TI's E2E forum. The ADS1258-EP is designed for applications requiring high accuracy and speed, such as industrial process control, medical instrumentation, and test and measurement equipment.
Technically, the ADS1258-EP uses a delta-sigma modulator followed by a digital filter, achieving single-cycle settling, which is critical for multiplexed systems where each channel must be read quickly. The device includes an internal oscillator and a programmable gain amplifier (PGA) with gains of 1, 2, 4, 8, 16, 32, and 64, allowing direct connection to a variety of sensors. The digital interface is SPI-compatible, enabling easy integration with microcontrollers and DSPs.
Typical applications include multi-channel data acquisition systems, industrial automation, medical monitoring, and precision instrumentation. The wide input range and high resolution make it ideal for measuring temperature, pressure, and strain gauge signals. The ADS1258-EP's enhanced temperature range (-55°C to +125°C) ensures reliable operation in harsh environments.
When designing with the ADS1258-EP, ensure proper decoupling of the analog and digital supplies, and use a low-noise reference voltage. The multiplexer switching can cause settling issues; therefore, the single-cycle settling feature is essential. Also, consider the input impedance and use appropriate anti-aliasing filters to maintain accuracy.
بدائل مباشرة لـ ADS1258-EP — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADS1258-EP (نفس عامل الشكل والبصمة) — يختلف في Architecture, Input Type, Operating Temperature Range, Package, Resolution.
ADS1258
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADS1258MRTCTEP
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADS1258MPHPTEP
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADS1258IRTCR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADS1258IPHPREP
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
GX1258
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADS1258-EP الحدود القصوى والخصائص الكهربائية
| الدقة | 24 Bit |
| Number of Channels | 8 Differential or 16 Single-Ended |
| Sampling Rate (per channel) | 1.8k to 23.7k SPS |
| Input Type | Single-Ended, Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Analog Supply Voltage | 5 V unipolar or ±2.5 V bipolar |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| Full-Scale Differential Range | 5 V or ±2.5 V |
| العلبة | 48-HTQFP (7x7) or 48-VQFN (7x7) |
| نطاق درجة حرارة التشغيل | -55°C to +125°C (Enhanced Product) |
| Number of Inputs | 8, 16 |
| Number of Converters | 1 |
| حالة RoHS | Compliant |
| نوع التركيب | Surface Mount |
تكوين أطراف ADS1258-EP
| دبوس 1 | AVDD — Analog power supply |
| دبوس 2 | AIN0 — Analog input 0 |
| دبوس 3 | AIN1 — Analog input 1 |
| دبوس 4 | AIN2 — Analog input 2 |
| دبوس 5 | AIN3 — Analog input 3 |
| دبوس 6 | AIN4 — Analog input 4 |
| دبوس 7 | AIN5 — Analog input 5 |
| دبوس 8 | AIN6 — Analog input 6 |
| دبوس 9 | AIN7 — Analog input 7 |
| دبوس 10 | AIN8 — Analog input 8 |
| دبوس 11 | AIN9 — Analog input 9 |
| دبوس 12 | AIN10 — Analog input 10 |
| دبوس 13 | AIN11 — Analog input 11 |
| دبوس 14 | AIN12 — Analog input 12 |
| دبوس 15 | AIN13 — Analog input 13 |
| دبوس 16 | AIN14 — Analog input 14 |
| دبوس 17 | AIN15 — Analog input 15 |
| دبوس 18 | AVSS — Analog ground |
| دبوس 19 | DVDD — Digital power supply |
| دبوس 20 | DGND — Digital ground |
| دبوس 21 | SCLK — Serial clock input |
| دبوس 22 | DIN — Serial data input |
| دبوس 23 | DOUT — Serial data output |
| دبوس 24 | CS — Chip select (active low) |
| دبوس 25 | DRDY — Data ready output |
| دبوس 26 | RESET — Reset input (active low) |
| دبوس 27 | SYNC — Synchronization input |
| دبوس 28 | CLKIN — External clock input |
| دبوس 29 | CLKOUT — Clock output |
| دبوس 30 | REFN — Negative reference input |
| دبوس 31 | REFP — Positive reference input |
| دبوس 32 | VREFOUT — Reference output |
| دبوس 33 | PGA_GAIN0 — PGA gain select bit 0 |
| دبوس 34 | PGA_GAIN1 — PGA gain select bit 1 |
| دبوس 35 | PGA_GAIN2 — PGA gain select bit 2 |
| دبوس 36 | MUX_CTRL0 — Multiplexer control bit 0 |
| دبوس 37 | MUX_CTRL1 — Multiplexer control bit 1 |
| دبوس 38 | MUX_CTRL2 — Multiplexer control bit 2 |
| دبوس 39 | MUX_CTRL3 — Multiplexer control bit 3 |
| دبوس 40 | TEST0 — Test pin (connect to ground) |
| دبوس 41 | TEST1 — Test pin (connect to ground) |
| دبوس 42 | NC — No connect |
| دبوس 43 | NC — No connect |
| دبوس 44 | NC — No connect |
| دبوس 45 | NC — No connect |
| دبوس 46 | NC — No connect |
| دبوس 47 | NC — No connect |
| دبوس 48 | NC — No connect |
التطبيقات النموذجية
ADS1258-EP مناسب لـ 6 التطبيقs: Industrial Process Control, Medical Instrumentation, Test and Measurement Equipment, Data Acquisition Systems, Automotive Test Systems, Energy Monitoring.
Industrial Process Control
The ADS1258-EP is ideal for industrial process control systems that require high-resolution, multi-channel analog input monitoring. With 16 single-ended or 8 differential inputs, it can interface with various sensors such as temperature, pressure, and flow transmitters. The 24-bit resolution and low noise ensure accurate measurement of process variables. The wide operating temperature range (-55°C to +125°C) makes it suitable for harsh industrial environments. The SPI interface allows easy integration with industrial microcontrollers and PLCs. The single-cycle settling feature enables fast channel scanning, which is critical for real-time control loops.
موصى به
Medical Instrumentation
In medical instrumentation, the ADS1258-EP provides high-precision data acquisition for patient monitoring devices, diagnostic equipment, and imaging systems. Its 24-bit resolution and low noise are essential for accurate measurement of physiological signals such as ECG, EEG, and blood pressure. The multiple input channels allow simultaneous monitoring of several parameters. The enhanced temperature range ensures reliable operation in medical environments. The device's small package (48-HTQFP or 48-VQFN) is suitable for compact medical devices. The SPI interface simplifies connection to medical-grade microcontrollers.
موصى به
Test and Measurement Equipment
The ADS1258-EP is well-suited for test and measurement equipment such as data loggers, spectrum analyzers, and precision multimeters. Its high resolution and fast scan rates enable accurate capture of dynamic signals. The flexible input multiplexer allows connection to multiple test points. The device's low noise performance ensures reliable measurements. The SPI interface enables high-speed data transfer to the host processor. The enhanced temperature range allows use in environmental testing chambers. The single-cycle settling feature is particularly beneficial for multiplexed measurements.
موصى به
Data Acquisition Systems
The ADS1258-EP is a core component in multi-channel data acquisition systems, providing high-resolution conversion of analog signals from various sensors. With 16 single-ended or 8 differential inputs, it can handle a large number of channels. The 24-bit resolution ensures high accuracy, and the scan rates up to 23.7k SPS per channel allow fast data collection. The device's low noise and high linearity make it suitable for precision measurements. The SPI interface allows easy connection to data acquisition controllers. The enhanced temperature range ensures reliable operation in field applications.
موصى به
Automotive Test Systems
In automotive test systems, the ADS1258-EP is used for measuring sensor outputs in engine control, battery management, and vehicle dynamics testing. Its wide temperature range (-55°C to +125°C) is crucial for under-hood and extreme environment applications. The 24-bit resolution and low noise ensure accurate measurement of signals such as temperature, pressure, and position. The multiple input channels allow simultaneous monitoring of various sensors. The SPI interface enables integration with automotive microcontrollers. The device's reliability is enhanced by the EP designation.
موصى به
Energy Monitoring
The ADS1258-EP is used in energy monitoring systems for measuring voltage and current with high precision. Its 24-bit resolution allows accurate measurement of power consumption. The multiple input channels can monitor multiple phases or circuits. The device's low noise ensures reliable readings. The SPI interface allows integration with energy management processors. The enhanced temperature range makes it suitable for outdoor metering applications. The single-cycle settling feature enables fast updates for real-time monitoring.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADS1258-EP — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADS1258 | ADS1258MRTCTEP | ADS1258MPHPTEP | GX1258 |
|---|---|---|---|---|---|
| Package | 48-HTQFP (7x7) or 48-VQFN (7x7) | 48-HTQFP (7x7) or 48-VQFN (7x7) | 48-VQFN (7x7) | 48-HTQFP (7x7) | 48-HTQFP (7x7) or 48-VQFN (7x7) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | GXSChip |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Number of Channels | 8 Differential or 16 Single-Ended | 8 Differential or 16 Single-Ended | 8 Differential or 16 Single-Ended | 8 Differential or 16 Single-Ended | 8 Differential or 16 Single-Ended |
| Sampling Rate (per channel) | 1.8k to 23.7k SPS | 1.8k to 23.7k SPS | 1.8k to 23.7k SPS | 1.8k to 23.7k SPS | 1.8k to 23.7k SPS |
أبرز الفروقات
- Enhanced temperature range (مقابلADS1258)
- High reliability (مقابلADS1258)
- Pin-to-pin compatibility with GX1258 (مقابلGX1258)
ملاحظات التصميم
The ADS1258-EP requires a clean analog supply (AVDD) and digital supply (DVDD). Use separate analog and digital grounds (AVSS and DGND) and connect them at a single point to avoid ground loops. Decouple each supply pin with a 0.1uF ceramic capacitor placed as close to the pin as possible, and a 10uF bulk capacitor for low-frequency noise. The analog supply can be 5V unipolar or ±2.5V bipolar; ensure the reference voltage is stable and low-noise.
For optimal performance, place the ADS1258-EP on a PCB with a solid ground plane. Keep analog input traces short and shielded from digital signals to minimize noise coupling. Use a star-ground topology for the analog and digital grounds. The exposed pad (if present) should be soldered to the ground plane for thermal and electrical performance. Follow the layout guidelines in the datasheet for the 48-HTQFP and 48-VQFN packages.
A common pitfall is improper multiplexer settling. The ADS1258-EP provides single-cycle settling, but external RC filters on the inputs can slow down settling. Ensure the input source impedance is low enough to allow settling within the conversion time. Also, avoid floating unused analog inputs; connect them to AVSS or a defined voltage. The reference inputs (REFP/REFN) must be bypassed with capacitors to reduce noise.
معلومات الامتثال
RoHS compliant per TI product page. Not AEC-Q100 qualified; EP version is for enhanced reliability, not automotive-specific.
