ADS1211 - 24-Bit Delta-Sigma ADC, 4-Channel | Texas Instruments
MPN: ADS1211 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8 | $8,000.00 |
Drop-in alternatives for ADS1211 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADS1210
β Drop-Inπ Reference alternative (not in catalog)
ADS1211U
β Drop-Inπ Reference alternative (not in catalog)
ADS1211E
β Drop-Inπ Reference alternative (not in catalog)
ADS1211 Maximum Ratings & Electrical Characteristics
| Resolution | 24 Bit |
| Number of Channels | 4 |
| Input Type | Differential |
| Data Interface | SPI |
| Sampling Rate | 16 kSPS |
| Architecture | Sigma-Delta |
| Supply Voltage | 5 V |
| Power Dissipation | 12 mW |
| Package Type | 24-Pin DIP, 24-Lead SOIC, 28-Lead SSOP |
| Operating Temperature Range | [DATA_NEEDED: Operating temperature range] |
| Reference Voltage | [DATA_NEEDED: Reference voltage] |
| INL (Integral Nonlinearity) | [DATA_NEEDED: INL] |
| SNR (Signal-to-Noise Ratio) | [DATA_NEEDED: SNR] |
| RoHS Status | Compliant |
| Mounting Type | Through Hole / Surface Mount |
ADS1211 Pin Configuration
| Pin 1 | AIN0 β Analog input channel 0 |
| Pin 2 | AIN1 β Analog input channel 1 |
| Pin 3 | AIN2 β Analog input channel 2 |
| Pin 4 | AIN3 β Analog input channel 3 |
| Pin 5 | VREF β Voltage reference input |
| Pin 6 | AVDD β Analog supply voltage |
| Pin 7 | AVSS β Analog ground |
| Pin 8 | DVDD β Digital supply voltage |
| Pin 9 | DVSS β Digital ground |
| Pin 10 | SCLK β Serial clock input |
| Pin 11 | SDIO β Serial data input/output |
| Pin 12 | CS β Chip select (active low) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADS1211 is suitable for 6 applications: Smart Transmitters, Industrial Process Control, Weigh Scales, Chromatography, Portable Instrumentation, Data Acquisition Systems.
Smart Transmitters
The ADS1211's 24-bit resolution and 4-channel multiplexer make it ideal for smart transmitters that monitor multiple process variables. Its SPI interface allows easy integration with microcontrollers, and the two-wire control mode simplifies isolation in industrial loops. The low power dissipation of 12mW is beneficial for loop-powered transmitters where power is limited.
Recommended
Industrial Process Control
In industrial process control, the ADS1211 provides high-accuracy measurement of temperature, pressure, and flow. Its wide dynamic range and self-calibration ensure reliable performance over time. The differential inputs reject common-mode noise, making it suitable for noisy industrial environments. The SPI interface connects directly to PLCs or industrial microcontrollers.
Recommended
Weigh Scales
The ADS1211 is designed for weigh scale applications, offering 24-bit resolution to detect small weight changes. Its low noise and high linearity ensure accurate measurements. The 4-channel multiplexer allows multiple load cells to be connected, reducing system cost. The serial interface simplifies connection to a microcontroller for display and processing.
Recommended
Chromatography
In chromatography systems, the ADS1211 provides high-resolution digitization of detector signals, enabling precise analysis. Its wide dynamic range captures both small and large peaks. The low power dissipation is beneficial for portable chromatography instruments. The SPI interface allows data transfer to a host processor for analysis.
Recommended
Portable Instrumentation
The ADS1211's low power dissipation of 12mW and single 5V supply make it ideal for portable instrumentation. Its 24-bit resolution provides high accuracy in battery-powered devices. The small package options (SOIC, SSOP) save PCB space. The SPI interface is compatible with low-power microcontrollers, enabling long battery life.
Recommended
Data Acquisition Systems
The ADS1211 is a key component in data acquisition systems, providing high-resolution conversion of multiple analog signals. Its 4-channel multiplexer reduces component count. The SPI interface allows easy integration with DSPs or FPGAs. The self-calibration feature ensures accuracy over temperature and time, making it suitable for precision DAQ systems.
Recommended
Recommended Products Summary
Engineering reference data for ADS1211 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS1210 | ADS1246 | ADS1255 |
|---|---|---|---|---|
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Number of Channels | 4 | 1 | 4 | 1 |
| Data Interface | SPI | SPI | SPI | SPI |
| Supply Voltage | 5 V | 5 V | 2.7 V to 5.25 V | 5 V |
| Power Dissipation | 12 mW | 12 mW | 0.4 mW | 38 mW |
| Package | DIP-24, SOIC-24, SSOP-28 | DIP-24, SOIC-24, SSOP-28 | TSSOP-16 | SSOP-20 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Sampling Rate | 16 kSPS | 16 kSPS | 2 kSPS | 30 kSPS |
Key Differentiators
- 4-channel input multiplexer (vs ADS1210)
- Low power dissipation of 12mW (vs ADS1255)
- Multiple package options (vs ADS1246)
Design Notes
The ADS1211 operates from a single +5V supply. Use separate analog and digital supply pins (AVDD, DVDD) with proper decoupling capacitors (0.1uF and 10uF) placed close to each pin. A low-noise linear regulator is recommended to avoid supply-induced noise.
For optimal performance, use a ground plane and separate analog and digital ground areas, connecting them at a single point. Keep analog input traces short and shielded from digital signals. Place the reference decoupling capacitor close to the VREF pin.
Ensure the reference voltage is stable and low-noise to achieve full 24-bit performance. Avoid routing digital signals near analog inputs. The serial interface timing must match the microcontroller's SPI settings; incorrect timing can cause communication errors.
Compliance Information
RoHS compliant per TI product page. No AEC-Q100 qualification for this part.
