Overview
The MAX1248ACPE is a 10-bit, low-power, 4-channel analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device is part of the MAX1248/MAX1249 family, which combines a 4-channel multiplexer, high-bandwidth track/hold, and a serial interface. It operates from a single supply voltage of +2.7V to +5.25V and is designed for applications requiring high conversion speed and low power consumption.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 10 bits |
| Number of Channels | 4 (single-ended or 2 differential) |
| Supply Voltage | +2.7V to +5.25V |
| Internal Reference | Internal 2.5V (MAX1248) |
| Power Consumption | 1.2mA (133ksps, +3V supply), 54µA (1ksps, +3V supply), 1µA (power-down mode) |
| Serial Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire serial interface |
| Conversion Time | 6 µs (typical) |
| Full-Power Bandwidth | 1.0 MHz |
| Small-Signal Bandwidth | 2.25 MHz |
| Channel-to-Channel Crosstalk | -75 dB |
| SFDR (Spurious-Free Dynamic Range) | -70 dB |
| THD (Total Harmonic Distortion) | -66 dB |
| SINAD (Signal-to-Noise + Distortion Ratio) | 66 dB |
| Operating Temperature Range | 0°C to +70°C (MAX1248_C_E), -40°C to +85°C (MAX1248_E_E), -55°C to +125°C (MAX1248_MJE) |
Key Features
- 4-channel single-ended or 2-channel differential inputs
- Single +2.7V to +5.25V operation
- Internal 2.5V reference (MAX1248)
- Low power consumption: 1.2mA (133ksps, +3V supply), 54µA (1ksps, +3V supply), 1µA (power-down mode)
- SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire serial interface
- Hard-wired SHDN pin and software-selectable power-down
- Automatic shutdown at the end of a conversion
- Quick turn-on time, allowing shutdown between conversions
- Available in 16-pin DIP and QSOP packages
Applications
- Portable Data Logging
- Data Acquisition
- Medical Instruments
- Battery-Powered Instruments
- Pen Digitizers
- System Supervision
Q & A
- What is the resolution of the MAX1248ACPE ADC?
The MAX1248ACPE has a resolution of 10 bits.
- How many channels does the MAX1248ACPE support?
The MAX1248ACPE supports 4 single-ended or 2 differential channels.
- What is the operating voltage range of the MAX1248ACPE?
The MAX1248ACPE operates from a single supply voltage of +2.7V to +5.25V.
- Does the MAX1248ACPE have an internal reference voltage?
Yes, the MAX1248 has an internal 2.5V reference voltage.
- What are the power consumption levels of the MAX1248ACPE?
The power consumption levels are 1.2mA (133ksps, +3V supply), 54µA (1ksps, +3V supply), and 1µA (power-down mode).
- What type of serial interface does the MAX1248ACPE use?
The MAX1248ACPE uses a SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire serial interface.
- How long does the MAX1248ACPE take to convert a signal?
The conversion time is typically 6 µs.
- What are the operating temperature ranges for the MAX1248ACPE?
The operating temperature ranges are 0°C to +70°C (MAX1248_C_E), -40°C to +85°C (MAX1248_E_E), and -55°C to +125°C (MAX1248_MJE).
- In what packages is the MAX1248ACPE available?
The MAX1248ACPE is available in 16-pin DIP and QSOP packages.
- Can the MAX1248ACPE be powered down between conversions?
Yes, the MAX1248ACPE can be powered down between conversions, reducing supply current to under 60µA at reduced sampling rates.
