ADS7042 - 12-Bit 1-MSPS Ultra-Low-Power SAR ADC | TI
MPN: ADS7042 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for ADS7042 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:
ADS7046
β Drop-Inπ Reference alternative (not in catalog)
ADS7049
β Drop-Inπ Reference alternative (not in catalog)
ADS7040
β Drop-Inπ Reference alternative (not in catalog)
ADS7042 Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Sampling Rate | 1 MSPS |
| Number of Inputs | 1 |
| Input Type | Single-ended |
| Analog Supply Voltage (AVDD) | 1.65 V to 3.6 V |
| Digital Supply Voltage (DVDD) | 1.65 V to 3.6 V |
| Analog Input Range | 0 to AVDD |
| Interface | SPI |
| Power Consumption | 0.3 mW at 1 MSPS (typical) |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Package | 8-pin VSSOP, 8-pin X2QFN |
| Mounting Type | Surface Mount |
| Architecture | SAR |
| Reference Type | Internal/External |
| RoHS Status | Compliant |
ADS7042 Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | AINP β Positive analog input |
| Pin 3 | AINM β Negative analog input |
| Pin 4 | GND β Ground |
| Pin 5 | DVDD β Digital power supply |
| Pin 6 | SCLK β Serial clock input |
| Pin 7 | SDO β Serial data output |
| Pin 8 | 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
ADS7042 is suitable for 6 applications: Battery Monitoring, Portable Instrumentation, Industrial Process Control, Medical Devices, IoT and Smart Sensors, Automotive Electronics.
Battery Monitoring
The ADS7042's ultra-low power consumption (0.3 mW at 1 MSPS) and small package make it ideal for battery voltage and current monitoring in portable devices. Its 12-bit resolution provides accurate measurements, while the SPI interface allows easy integration with microcontrollers. The wide supply range (1.65V to 3.6V) matches common battery voltages, and the power-down mode extends battery life during idle periods.
Recommended
Portable Instrumentation
In portable instruments like multimeters and data loggers, the ADS7042 provides high-speed (1 MSPS) and accurate (12-bit) analog-to-digital conversion while consuming minimal power. Its small VSSOP-8 or X2QFN-8 package saves board space, and the SPI interface simplifies connection to low-power microcontrollers. The device's wide temperature range (-40Β°C to +125Β°C) ensures reliable operation in field environments.
Recommended
Industrial Process Control
The ADS7042 is suitable for industrial process control systems that require accurate and fast analog-to-digital conversion of sensor signals. Its 1-MSPS sampling rate enables real-time monitoring of pressure, temperature, and flow. The device's low power consumption reduces heat generation in control cabinets, and its SPI interface allows easy integration with PLCs and industrial microcontrollers. The wide operating temperature range ensures reliability in harsh industrial environments.
Recommended
Medical Devices
In medical devices such as patient monitors and portable diagnostic equipment, the ADS7042 offers the low power and small size needed for battery-powered operation. Its 12-bit resolution and 1-MSPS sampling rate are sufficient for capturing vital signs like ECG and temperature. The device's SPI interface enables seamless connection to medical-grade microcontrollers, and its wide temperature range supports sterilization and storage conditions.
Recommended
IoT and Smart Sensors
The ADS7042 is ideal for IoT and smart sensor nodes that require low-power, high-resolution analog-to-digital conversion. Its ultra-low power consumption (0.3 mW) extends battery life in wireless sensor networks, and its small package fits into compact designs. The SPI interface allows direct connection to low-power wireless MCUs like CC2652R1, enabling efficient data acquisition and transmission. The device's wide supply range supports energy harvesting applications.
Recommended
Automotive Electronics
The ADS7042 is suitable for automotive applications such as battery management systems and motor control, where its wide temperature range (-40Β°C to +125Β°C) and low power consumption are critical. The device's 12-bit resolution and 1-MSPS sampling rate enable accurate sensing of voltage, current, and temperature. Its small package and SPI interface facilitate integration into space-constrained automotive ECUs. The device is AEC-Q100 qualified, ensuring reliability in harsh automotive environments.
Recommended
Recommended Products Summary
Engineering reference data for ADS7042 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS7046 | ADS7049 | ADS7040 |
|---|---|---|---|---|
| Resolution | 12 bits | 12 bits | 10 bits | 12 bits |
| Sampling Rate | 1 MSPS | 3 MSPS | 1 MSPS | 100 kSPS |
| Power Consumption | 0.3 mW at 1 MSPS | 0.9 mW at 3 MSPS | 0.3 mW at 1 MSPS | 0.03 mW at 100 kSPS |
| Package | VSSOP-8, X2QFN-8 | VSSOP-8, X2QFN-8 | VSSOP-8, X2QFN-8 | VSSOP-8, X2QFN-8 |
| Input Range | 0 to AVDD | 0 to AVDD | 0 to AVDD | 0 to AVDD |
| Interface | SPI | SPI | SPI | SPI |
| Operating Temperature | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
Key Differentiators
- Ultra-low power consumption (vs ADS7046)
- Small package options (vs ADS7866)
- Wide supply range (vs ADS7866)
Design Notes
The ADS7042 requires separate analog (AVDD) and digital (DVDD) supplies, both ranging from 1.65V to 3.6V. Use low-impedance sources and place 0.1uF decoupling capacitors close to each supply pin. For optimal performance, ensure AVDD is clean and free of noise, as it directly affects the analog input range and conversion accuracy.
For best performance, keep the analog input traces short and shielded from digital signals. Use a ground plane under the ADC to minimize noise. Place the SPI lines (SCLK, SDO, CS) away from the analog input to avoid coupling. If the source impedance is high, consider adding a buffer amplifier to drive the ADC input.
Do not exceed the absolute maximum ratings: AVDD and DVDD must not exceed 3.9V, and the analog input must not go below GND or above AVDD. Ensure the SPI clock frequency does not exceed 40 MHz. Also, avoid floating the CS pin; tie it high when not in use. Proper power sequencing is recommended to prevent latch-up.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified for standard version; automotive variants may be available.
