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 | $9.8 | $980.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.9 | $7,900.00 |
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)
ADS1211 Maximum Ratings & Electrical Characteristics
| Resolution | 24 bits |
| Number of Input Channels | 4 (multiplexed) |
| Input Type | Differential |
| Supply Voltage | 5 V (single) |
| Power Dissipation | 12 mW |
| Interface | SPI-compatible serial, 2-wire mode |
| Package Options | 24-pin DIP, 24-lead SOIC, 28-lead SSOP |
| Effective Resolution | 23 bits at 10 Hz, 20 bits at 1000 Hz |
| Programmable Gain Amplifier | Yes |
| Programmable Cut-off Frequency | Yes |
| Self-Calibration | Yes |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| Reference Voltage | [DATA_NEEDED: reference voltage] |
| RoHS Status | [DATA_NEEDED: RoHS status] |
| Mounting Type | Through-hole (DIP) or Surface Mount (SOIC, SSOP) |
ADS1211 Pin Configuration
| Pin 1 | AIN0 β Analog input channel 0 (differential positive) |
| Pin 2 | AIN1 β Analog input channel 0 (differential negative) |
| Pin 3 | AIN2 β Analog input channel 1 (differential positive) |
| Pin 4 | AIN3 β Analog input channel 1 (differential negative) |
| Pin 5 | AIN4 β Analog input channel 2 (differential positive) |
| Pin 6 | AIN5 β Analog input channel 2 (differential negative) |
| Pin 7 | AIN6 β Analog input channel 3 (differential positive) |
| Pin 8 | AIN7 β Analog input channel 3 (differential negative) |
| Pin 9 | VREF β Voltage reference input |
| Pin 10 | AVDD β Analog power supply |
| Pin 11 | AVSS β Analog ground |
| Pin 12 | DVDD β Digital power supply |
| Pin 13 | DGND β Digital ground |
| Pin 14 | SCLK β Serial clock input |
| Pin 15 | SDIO β Serial data input/output |
| Pin 16 | CS β Chip select (active low) |
| Pin 17 | DRDY β Data ready output |
| Pin 18 | MODE β Interface mode select |
| Pin 19 | SYNC β Synchronization input |
| Pin 20 | PDWN β Power down input |
| Pin 21 | VBIAS β Bias voltage output |
| Pin 22 | NC β No connect |
| Pin 23 | NC β No connect |
| Pin 24 | NC β No connect |
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 low power dissipation of 12mW is suitable for loop-powered transmitters. The SPI-compatible interface allows easy connection to a microcontroller for digital compensation and communication. The differential inputs reject common-mode noise, ensuring accurate measurement of sensor signals in industrial environments.
Recommended
Industrial Process Control
In industrial process control, the ADS1211 provides high-resolution conversion of analog sensor signals such as temperature, pressure, and flow. Its 24-bit resolution ensures precise measurement, while the programmable gain amplifier allows adaptation to various signal levels. The two-wire control mode simplifies isolation, which is critical in noisy industrial environments. The device's wide dynamic range and low noise contribute to reliable process monitoring and control.
Recommended
Weigh Scales
The ADS1211 is well-suited for weigh scales due to its 24-bit resolution and low noise, enabling precise weight measurements. The 4-channel multiplexer allows multiple load cells to be connected to a single ADC, reducing system cost. The differential inputs directly interface with bridge-type load cells, and the programmable gain amplifier optimizes the signal range. The SPI interface simplifies connection to a microcontroller for calibration and display.
Recommended
Chromatography
In chromatography systems, the ADS1211's high resolution and low noise are essential for detecting small analyte concentrations. The 4-channel multiplexer can monitor multiple detector outputs, and the programmable gain amplifier adjusts to different signal amplitudes. The SPI interface allows high-speed data transfer to a host processor for analysis. The device's low power dissipation is beneficial in benchtop instruments.
Recommended
Portable Instrumentation
The ADS1211's low power dissipation of 12mW makes it suitable for portable, battery-powered instrumentation. Its 24-bit resolution ensures accurate measurements in field devices such as data loggers and handheld meters. The 4-channel multiplexer allows multiple sensors to be read with a single ADC, saving space and power. The SPI interface is compatible with low-power microcontrollers, enabling efficient system design.
Recommended
Data Acquisition Systems
The ADS1211 is a key component in multi-channel data acquisition systems, providing high-resolution conversion of analog signals. Its 4-channel multiplexer and differential inputs allow flexible connection to various sensors. The SPI interface enables easy integration with FPGAs or DSPs for high-speed data processing. The device's self-calibration feature ensures accuracy over time and temperature, making it reliable for long-term monitoring applications.
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 | ADS1219 | ADS124S08 | ADS124S06 | ADS1255 | ADS1220 |
|---|---|---|---|---|---|---|---|
| Package | 24-pin DIP, 24-lead SOIC, 28-lead SSOP | 24-pin DIP, 24-lead SOIC, 28-lead SSOP | VSSOP-10 | VQFN-32 | VQFN-32 | SSOP-20 | VSSOP-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 24 bits | 24 bits | 24 bits | 24 bits | 24 bits | 24 bits | 24 bits |
| Number of Channels | 4 (multiplexed) | 1 (differential) | 4 (multiplexed) | 8 (multiplexed) | 6 (multiplexed) | 2 (multiplexed) | 4 (multiplexed) |
| Interface | SPI-compatible, 2-wire mode | SPI-compatible, 2-wire mode | I2C | SPI | SPI | SPI | SPI |
| Supply Voltage | 5 V (single) | 5 V (single) | 2.3 V to 5.5 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 5 V (single) | 2.3 V to 5.5 V |
| Power Dissipation | 12 mW | 12 mW | 0.3 mW (typical) | 2.5 mW (typical) | 2.5 mW (typical) | 38 mW (typical) | 0.3 mW (typical) |
| Programmable Gain Amplifier | Yes | Yes | No | Yes | Yes | Yes | Yes |
Key Differentiators
- 4-channel input multiplexer (vs ADS1210)
- Low power dissipation of 12mW (vs ADS1255)
- Two-wire control mode for isolation (vs ADS1219)
Design Notes
The ADS1211 operates from a single +5V supply and dissipates approximately 12mW. Ensure that the analog and digital supplies are properly decoupled with 0.1uF and 10uF capacitors placed close to the AVDD and DVDD pins. A clean, low-noise supply is essential for achieving the full 24-bit performance.
For optimal performance, use a ground plane and separate analog and digital ground areas, connecting them at a single point. Keep the analog input traces short and shielded from digital signals. Place the reference voltage source close to the VREF pin and use a precision reference such as the REF1930 for stable operation.
Avoid exceeding the absolute maximum ratings on any pin. Ensure the serial interface timing matches the microcontroller's SPI settings to prevent communication errors. The two-wire mode requires proper configuration of the MODE pin. Also, note that the ADS1211 is not pin-compatible with the ADS1210 on all pins; verify the pinout before replacement.
Compliance Information
Compliance information not explicitly provided in the verified data. Refer to the TI product page for RoHS and REACH status.
