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)
ADS7040
β Drop-Inπ Reference alternative (not in catalog)
ADS7043
β Drop-Inπ Reference alternative (not in catalog)
ADS7866
β‘ Same Packageπ Reference alternative (not in catalog)
ADS7042IDCUT
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 |
| SPI Clock Speed | Up to 40 MHz |
| Power Consumption | 0.3 mW at 1 MSPS (typical) |
| Power-Down Mode | Yes |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Package Options | 8-pin VSSOP, 8-pin X2QFN |
| Mounting Type | Surface Mount |
| Architecture | SAR (Successive Approximation Register) |
| Sample-and-Hold | Inherent |
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 Home, Automotive Sensing.
Battery Monitoring
The ADS7042's ultra-low power consumption (0.3 mW at 1 MSPS) and small package make it ideal for continuous battery voltage and current monitoring in portable devices. Its wide input range (0 to AVDD) allows direct connection to battery voltage dividers, and the SPI interface enables easy integration with microcontrollers for real-time battery status reporting. The low power draw ensures minimal impact on battery life, making it suitable for IoT and wearable applications.
Recommended
Portable Instrumentation
In portable instrumentation, the ADS7042 provides high-speed (1 MSPS) and accurate (12-bit) data acquisition while consuming minimal power. Its small VSSOP-8 or X2QFN-8 package allows for compact designs, and the SPI interface simplifies connection to host processors. The device's wide operating temperature range (-40Β°C to +125Β°C) ensures reliable operation in field environments. It is well-suited for handheld multimeters, data loggers, and portable test equipment.
Recommended
Industrial Process Control
The ADS7042 is suitable for industrial process control applications such as temperature, pressure, and flow monitoring. Its 12-bit resolution and 1 MSPS sampling rate provide sufficient accuracy and speed for real-time control loops. The device's wide analog input range (0 to AVDD) allows direct interface with various sensors, and its SPI interface enables easy integration with PLCs and industrial microcontrollers. The -40Β°C to +125Β°C operating range ensures reliable performance in harsh industrial environments.
Recommended
Medical Devices
The ADS7042 is ideal for medical devices such as portable patient monitors, glucose meters, and diagnostic equipment. Its ultra-low power consumption extends battery life, and its small package allows for miniaturized designs. The device's high accuracy (12-bit) ensures reliable measurement of physiological signals, and its SPI interface simplifies integration with medical-grade microcontrollers. The wide operating temperature range ensures reliability in clinical environments.
Recommended
IoT and Smart Home
In IoT and smart home applications, the ADS7042 provides low-power, high-accuracy analog-to-digital conversion for sensors such as temperature, humidity, and light. Its ultra-low power consumption (0.3 mW) is critical for battery-powered IoT nodes, and its small package enables compact sensor modules. The SPI interface allows easy connection to low-power MCUs like the MSP430 or CC2541. The device's wide input range supports various sensor output voltages.
Recommended
Automotive Sensing
The ADS7042 is suitable for automotive sensing applications such as battery management, motor control, and environmental monitoring. Its wide operating temperature range (-40Β°C to +125Β°C) meets automotive requirements, and its low power consumption is beneficial for always-on systems. The device's small package and SPI interface enable integration into space-constrained automotive modules. It can be used to monitor analog signals from sensors like temperature, pressure, and position.
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 | ADS7040 | ADS7043 | ADS7866 |
|---|---|---|---|---|---|
| Package | VSSOP-8, X2QFN-8 | VSSOP-8, X2QFN-8 | VSSOP-8, X2QFN-8 | VSSOP-8, X2QFN-8 | SOT23-6, QFN-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 1 MSPS | 3 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Analog Supply Voltage | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 2.7V to 5.5V |
| Digital Supply Voltage | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 2.7V to 5.5V |
| Power Consumption | 0.3 mW at 1 MSPS | 0.9 mW at 3 MSPS | 0.3 mW at 1 MSPS | 0.3 mW at 1 MSPS | 0.5 mW at 1 MSPS |
| Interface | SPI | SPI | SPI | SPI | SPI |
Key Differentiators
- Ultra-low power consumption (vs ADS7866)
- Separate analog and digital supplies (vs ADS7866)
- Higher sampling rate option (vs ADS7040)
Design Notes
Decouple AVDD and DVDD with 0.1uF ceramic capacitors placed as close to the pins as possible. Additionally, a 1uF capacitor on AVDD is recommended for stable operation. The power consumption scales with sampling rate, so reduce the sampling rate to save power in low-throughput applications.
Keep SPI lines (SCLK, SDO, CS) short and shielded to minimize noise and crosstalk. Use a ground plane under the ADC to reduce noise coupling. For optimal performance, ensure the analog input source impedance is low; if not, add a driver amplifier such as the OPA211.
Do not exceed the absolute maximum ratings: AVDD and DVDD must not exceed 3.6V, and the analog input must not go below GND or above AVDD. Also, ensure proper power-up sequencing: apply AVDD before DVDD to avoid latch-up. Refer to the datasheet for detailed timing requirements.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider the ADS7042-Q1 variant if available.
