ADS1258-EP - 16-Channel 24-Bit ADC | Texas Instruments
MPN: ADS1258-EP ✓ Hoạt độngADS1258-EP Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADS1258-EP — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADS1258-EP (cùng hình factor và footprint) — khác nhau ở Architecture, Input Type, Operating Temperature Range, Package, Resolution.
ADS1258
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS1258MRTCTEP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS1258MPHPTEP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS1258IRTCR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS1258IPHPREP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
GX1258
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADS1258-EP Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 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 |
| Hộp | 48-HTQFP (7x7) or 48-VQFN (7x7) |
| Khoảng nhiệt độ hoạt động | -55°C to +125°C (Enhanced Product) |
| Number of Inputs | 8, 16 |
| Number of Converters | 1 |
| Trạng thái RoHS | Compliant |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân ADS1258-EP
| Chân 1 | AVDD — Analog power supply |
| Chân 2 | AIN0 — Analog input 0 |
| Chân 3 | AIN1 — Analog input 1 |
| Chân 4 | AIN2 — Analog input 2 |
| Chân 5 | AIN3 — Analog input 3 |
| Chân 6 | AIN4 — Analog input 4 |
| Chân 7 | AIN5 — Analog input 5 |
| Chân 8 | AIN6 — Analog input 6 |
| Chân 9 | AIN7 — Analog input 7 |
| Chân 10 | AIN8 — Analog input 8 |
| Chân 11 | AIN9 — Analog input 9 |
| Chân 12 | AIN10 — Analog input 10 |
| Chân 13 | AIN11 — Analog input 11 |
| Chân 14 | AIN12 — Analog input 12 |
| Chân 15 | AIN13 — Analog input 13 |
| Chân 16 | AIN14 — Analog input 14 |
| Chân 17 | AIN15 — Analog input 15 |
| Chân 18 | AVSS — Analog ground |
| Chân 19 | DVDD — Digital power supply |
| Chân 20 | DGND — Digital ground |
| Chân 21 | SCLK — Serial clock input |
| Chân 22 | DIN — Serial data input |
| Chân 23 | DOUT — Serial data output |
| Chân 24 | CS — Chip select (active low) |
| Chân 25 | DRDY — Data ready output |
| Chân 26 | RESET — Reset input (active low) |
| Chân 27 | SYNC — Synchronization input |
| Chân 28 | CLKIN — External clock input |
| Chân 29 | CLKOUT — Clock output |
| Chân 30 | REFN — Negative reference input |
| Chân 31 | REFP — Positive reference input |
| Chân 32 | VREFOUT — Reference output |
| Chân 33 | PGA_GAIN0 — PGA gain select bit 0 |
| Chân 34 | PGA_GAIN1 — PGA gain select bit 1 |
| Chân 35 | PGA_GAIN2 — PGA gain select bit 2 |
| Chân 36 | MUX_CTRL0 — Multiplexer control bit 0 |
| Chân 37 | MUX_CTRL1 — Multiplexer control bit 1 |
| Chân 38 | MUX_CTRL2 — Multiplexer control bit 2 |
| Chân 39 | MUX_CTRL3 — Multiplexer control bit 3 |
| Chân 40 | TEST0 — Test pin (connect to ground) |
| Chân 41 | TEST1 — Test pin (connect to ground) |
| Chân 42 | NC — No connect |
| Chân 43 | NC — No connect |
| Chân 44 | NC — No connect |
| Chân 45 | NC — No connect |
| Chân 46 | NC — No connect |
| Chân 47 | NC — No connect |
| Chân 48 | NC — No connect |
Ứng dụng tiêu biểu
ADS1258-EP phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADS1258-EP — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Enhanced temperature range (vsADS1258)
- High reliability (vsADS1258)
- Pin-to-pin compatibility with GX1258 (vsGX1258)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliant per TI product page. Not AEC-Q100 qualified; EP version is for enhanced reliability, not automotive-specific.
