Overview
The MAX1068ACEG+ is a low-power, multichannel, 14-bit analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device features a successive-approximation ADC, an integrated +4.096V reference, a reference buffer, an internal oscillator, and automatic power-down. It operates with a single +5V analog supply and has a separate digital supply, allowing direct interfacing with +2.7V to +5.5V digital logic. The MAX1068 is designed for applications requiring high dynamic performance, low power consumption, and compact packaging.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Resolution | - | - | - | 14 bits | - | - |
| Sampling Rate | fS | - | - | 200 ksps | - | - |
| Analog Supply Voltage | AVDD | - | 4.75V | 5V | 5.25V | V |
| Digital Supply Voltage | DVDD | - | 2.7V | - | 5.5V | V |
| Input Voltage Range | - | - | 0 | - | VREF | V |
| Reference Voltage | VREF | - | 3.8V | 4.096V | AVDD | V |
| Current Consumption at 200ksps | - | AVDD = DVDD = +5V | - | 3.6mA | - | mA |
| Current Consumption at 10ksps | - | AVDD = DVDD = +5V | - | 185µA | - | µA |
| Package Type | - | - | - | - | 24-pin QSOP | - |
| Operating Temperature Range | - | - | -40°C | - | +85°C | °C |
Key Features
- 14-bit resolution with ±0.5 LSB INL and ±1 LSB DNL (max)
- +5V single-supply operation with adjustable logic level (+2.7V to +5.25V)
- Internal (+4.096V) or external (+3.8V to AVDD) reference
- Internal track/hold, 4MHz input bandwidth
- Internal or external clock
- SPI/QSPI/MICROWIRE-compatible serial interface
- DSP-initiated conversions with DSP frame-sync input and output
- 8-bit-wide or 16-bit-wide data-transfer mode
- Scan mode for sequential or continuous conversion of multiple channels
- Low power consumption: 3.6mA at 200ksps, 185µA at 10ksps, and less than 10µA at reduced sampling rates
- Compact 24-pin QSOP package
Applications
- Motor Control
- Industrial Process Control
- Industrial I/O Modules
- Data-Acquisition Systems
- Thermocouple Measurements
- Accelerometer Measurements
Q & A
- What is the resolution of the MAX1068 ADC?
The MAX1068 has a 14-bit resolution. - What is the maximum sampling rate of the MAX1068?
The MAX1068 can sample at up to 200 ksps. - What is the operating voltage range for the analog supply of the MAX1068?
The analog supply voltage (AVDD) ranges from 4.75V to 5.25V. - Can the MAX1068 operate with different digital logic levels?
Yes, the MAX1068 can operate with digital logic levels from +2.7V to +5.5V. - What types of references can be used with the MAX1068?
The MAX1068 can use either an internal (+4.096V) or an external reference (+3.8V to AVDD). - Does the MAX1068 support DSP-initiated conversions?
Yes, the MAX1068 supports DSP-initiated conversions with DSP frame-sync input and output. - What data-transfer modes are available on the MAX1068?
The MAX1068 supports both 8-bit-wide and 16-bit-wide data-transfer modes. - How many analog input channels does the MAX1068 support?
The MAX1068 supports up to eight analog input channels. - What is the power consumption of the MAX1068 at different sampling rates?
The MAX1068 consumes 3.6mA at 200ksps, 185µA at 10ksps, and less than 10µA at reduced sampling rates. - In what package is the MAX1068 available?
The MAX1068 is available in a 24-pin QSOP package.
