ADS7066 - 16-Bit 8-Ch SAR ADC with GPIOs | Texas Instruments
MPN: ADS7066 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
Drop-in alternatives for ADS7066 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:
ADS7066IYBHR
β Drop-Inπ Reference alternative (not in catalog)
ADS7066IYBHT
β Drop-Inπ Reference alternative (not in catalog)
ADS7066 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Number of Channels | 8 |
| Sampling Rate | 250 kSPS |
| Architecture | SAR |
| Input Type | Single-ended |
| Interface | SPI |
| Reference Type | Internal, capless 2.5 V |
| Supply Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40Β°C to +125Β°C |
| Package | 16-DSBGA (1.62x1.62 mm) |
| Mounting Type | Surface Mount |
| GPIO | Yes, configurable |
| Averaging Filter | Programmable |
| RoHS Status | Compliant |
| Number of Conversions | 8 |
ADS7066 Pin Configuration
| Pin A1 | AVDD β Analog power supply |
| Pin A2 | AIN0 β Analog input channel 0 |
| Pin A3 | AIN1 β Analog input channel 1 |
| Pin A4 | AIN2 β Analog input channel 2 |
| Pin B1 | AIN3 β Analog input channel 3 |
| Pin B2 | AIN4 β Analog input channel 4 |
| Pin B3 | AIN5 β Analog input channel 5 |
| Pin B4 | AIN6 β Analog input channel 6 |
| Pin C1 | AIN7 β Analog input channel 7 |
| Pin C2 | GND β Ground |
| Pin C3 | SCLK β SPI clock |
| Pin C4 | SDI β SPI data input |
| Pin D1 | SDO β SPI data output |
| Pin D2 | CS β Chip select |
| Pin D3 | GPIO0 β General purpose I/O |
| Pin D4 | GPIO1 β General purpose I/O |
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
ADS7066 is suitable for 6 applications: Motor Control, Industrial Process Control, Data Acquisition Systems, Portable Instrumentation, Medical Monitoring, IoT Sensors.
Motor Control
The ADS7066's 8-channel configuration and 250-kSPS sampling rate enable simultaneous monitoring of phase currents and voltages in motor control systems. Its small DSBGA package fits compact drives, and the GPIOs can handle encoder inputs, reducing external components. The integrated reference simplifies design, while the SPI interface allows fast data transfer to the MCU. With 16-bit resolution, it provides precise feedback for smooth torque control and efficiency optimization.
Recommended
Industrial Process Control
In industrial process control, the ADS7066 monitors multiple sensors such as temperature, pressure, and flow. Its 16-bit resolution ensures accurate measurement, and the 8 channels allow consolidation of several analog signals into one ADC. The capless reference reduces external parts, enhancing reliability in harsh environments. The wide operating temperature range and SPI interface make it easy to integrate with PLCs and industrial MCUs. The GPIOs can be used for digital I/O, further simplifying the design.
Recommended
Data Acquisition Systems
The ADS7066 is ideal for portable data acquisition systems due to its small size and low power consumption. It can sample multiple analog channels at 250 kSPS, capturing transient events with high fidelity. The integrated reference and GPIOs reduce the bill of materials, making it cost-effective for multi-channel loggers. The SPI interface allows direct connection to microcontrollers, and the programmable averaging filter improves noise performance. Its 16-bit resolution provides the dynamic range needed for precision measurements.
Recommended
Portable Instrumentation
For portable instruments like multimeters and handheld analyzers, the ADS7066 offers a compact solution with high precision. Its 1.62 mm x 1.62 mm DSBGA package saves PCB space, and the low supply voltage (3.0-3.6 V) is compatible with battery power. The 8 channels can be used for various measurement functions, and the GPIOs can drive indicators or switches. The capless reference eliminates the need for external components, reducing size and cost. The SPI interface ensures efficient communication with the host processor.
Recommended
Medical Monitoring
In medical monitoring devices, the ADS7066 provides high-resolution conversion of biosignals such as ECG and EEG. Its 16-bit resolution captures subtle signal variations, and the 8 channels allow monitoring multiple leads or sensors. The small package is suitable for wearable devices, and the low power consumption extends battery life. The integrated reference ensures stable operation, while the SPI interface enables data streaming to a processor. The GPIOs can be used for patient alert buttons or status LEDs.
Recommended
IoT Sensors
The ADS7066 is well-suited for IoT sensor nodes that require multiple analog inputs in a tiny footprint. Its 8 channels can interface with various sensors (temperature, humidity, gas) and the GPIOs can control actuators or communication modules. The capless reference and small package minimize PCB area, enabling compact designs. The low supply voltage and power consumption are ideal for battery-powered IoT devices. The SPI interface allows easy integration with wireless MCUs like CC2652R1.
Recommended
Recommended Products Summary
Engineering reference data for ADS7066 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS7066IYBHR | ADS7066IYBHT | ADS8166 | AD7689BCPZRL7 |
|---|---|---|---|---|---|
| Package | 16-DSBGA (1.62x1.62 mm) | 16-DSBGA (1.62x1.62 mm) - same | 16-DSBGA (1.62x1.62 mm) - same | WQFN-32 | LFCSP-20 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Number of Channels | 8 | 8 | 8 | 16 | 8 |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS |
| Internal Reference | Yes, capless 2.5V | Yes, capless 2.5V | Yes, capless 2.5V | Yes, capless 2.5V | Yes, 2.5V |
| GPIO | Yes, configurable | Yes, configurable | Yes, configurable | Yes, configurable | No |
| Supply Voltage | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 2.3V to 5.5V |
Key Differentiators
- Smallest 8-channel 16-bit SAR ADC package (vs ADS8166)
- Integrated capless reference (vs AD7689BCPZRL7)
- Configurable GPIOs (vs AD7689BCPZRL7)
Design Notes
For optimal performance, place decoupling capacitors (0.1 Β΅F and 10 Β΅F) close to the AVDD pin. The DSBGA package requires careful PCB layout; use micro-vias and ensure the thermal pad is connected to the ground plane. Keep analog input traces short and shielded from digital signals to minimize noise coupling.
The ADS7066 operates from 3.0V to 3.6V. Use a low-noise LDO to supply AVDD, and ensure the supply is stable during conversions. The integrated reference requires no external capacitor, but a 0.1 Β΅F decoupling capacitor on AVDD is recommended. Power consumption scales with sampling rate; reduce the sampling rate to save power in battery-operated designs.
The SPI interface should be isolated from noisy digital lines to prevent corruption of conversion results. Use series resistors on SCLK and SDI to reduce ringing. For high-accuracy measurements, use a clean ground plane and avoid ground loops. The GPIOs can be used to trigger conversions, reducing jitter.
Compliance Information
RoHS compliance indicated on TI product page. Other compliance data not specified in provided sources.
