Overview
The MAX117CAI+T is a high-performance, 8-channel, 8-bit analog-to-digital converter (ADC) designed by Analog Devices Inc./Maxim Integrated. This device operates from a single +3V supply and utilizes a half-flash technique to achieve a conversion time of 1.8µs, resulting in a conversion rate of 400ksps. The MAX117CAI+T is packaged in a 28-pin SSOP and is particularly suited for applications requiring low power consumption and high-speed conversion.
The ADC features a power-down mode that reduces current consumption to 1µA, making it ideal for battery-powered systems and burst-mode applications. It includes a track/hold circuit, enabling the digitization of fast analog signals, and supports ratiometric operation with internally connected reference voltage monitoring.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 8 |
| Resolution | 8-bit |
| Supply Voltage Range | 3V to 3.6V |
| Conversion Time | 1.8µs |
| Conversion Rate | 400ksps |
| Power Consumption (Operating) | 1.5mA at VDD = 3V, 2.5mA at VDD = 3.6V |
| Power Consumption (Power-Down) | 1µA typical |
| Operating Temperature Range | 0°C to 70°C |
| Package Type | 28-pin SSOP |
| Total Unadjusted Error | ≤ 1LSB |
| Differential Nonlinearity (DNL) | ±1LSB (no missing codes) |
| Input Full Power Bandwidth | 0.3MHz |
| Input Slew Rate (Tracking) | 0.5V/µs |
| Power Supply Rejection (PSR) | ±1/16LSB |
Key Features
- Microprocessor Compatibility: The ADC can appear as a memory location or I/O port without external interface logic, simplifying microprocessor interfaces.
- Low Power Consumption: Features a power-down mode that reduces current consumption to 1µA, ideal for battery-powered systems and burst-mode applications.
- Fast Conversion Time: Achieves a conversion time of 1.8µs and a conversion rate of 400ksps using a half-flash technique.
- Track/Hold Circuit: Enables the digitization of fast analog signals.
- Ratiometric Operation: Supports ratiometric operation with internally connected reference voltage monitoring.
- Parallel Interface: Data outputs use latched, three-state buffer circuitry for direct connection to an 8-bit parallel microprocessor data bus or system input port.
- No External Clock Required: Operates without the need for an external clock.
Applications
- Signal Processing: Suitable for various signal processing tasks due to its high-speed conversion and low power consumption.
- Medical Devices: Used in medical equipment where precise and fast analog-to-digital conversion is necessary.
- Portable Devices: Ideal for battery-powered portable devices due to its low power consumption in both operating and power-down modes.
- Communications & Networking: Applied in communication and networking systems that require high-speed data conversion.
- System-Health Monitoring: Used in system-health monitoring applications where continuous and accurate data conversion is required.
- Remote Data Acquisition: Suitable for remote data acquisition systems that need reliable and efficient analog-to-digital conversion.
Q & A
- What is the supply voltage range for the MAX117CAI+T?
The supply voltage range for the MAX117CAI+T is from 3V to 3.6V.
- What is the conversion time and rate of the MAX117CAI+T?
The conversion time is 1.8µs, and the conversion rate is 400ksps.
- How much power does the MAX117CAI+T consume in power-down mode?
The device consumes 1µA typical in power-down mode.
- What is the operating temperature range for the MAX117CAI+T?
The operating temperature range is from 0°C to 70°C.
- Does the MAX117CAI+T require an external clock?
No, the MAX117CAI+T does not require an external clock.
- What type of interface does the MAX117CAI+T use for data output?
The data outputs use latched, three-state buffer circuitry for direct connection to an 8-bit parallel microprocessor data bus or system input port.
- What is the total unadjusted error and differential nonlinearity of the MAX117CAI+T?
The total unadjusted error is ≤ 1LSB, and the differential nonlinearity is ±1LSB (no missing codes).
- What is the input full power bandwidth and slew rate of the MAX117CAI+T?
The input full power bandwidth is 0.3MHz, and the input slew rate is 0.5V/µs.
- What are some common applications of the MAX117CAI+T?
Common applications include signal processing, medical devices, portable devices, communications and networking, system-health monitoring, and remote data acquisition.
- How does the MAX117CAI+T support ratiometric operation?
The MAX117CAI+T supports ratiometric operation with internally connected reference voltage monitoring.
