Overview
The MAX1203BCPP is a 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This component is part of the MAX1202/MAX1203 family, designed for use in applications with mixed +5V (analog) and +3V (digital) supply voltages. It combines an 8-channel multiplexer, high-bandwidth track/hold, and a serial interface, making it suitable for various data-acquisition systems. The MAX1203 operates with a single +5V analog supply or dual ±5V analog supplies and supports both unipolar and bipolar input configurations.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Number of Channels | 8 | ||||
| Resolution | 12-bit | ||||
| Conversion Rate | Internal clock | 5.5 | 10 | µs | |
| Conversion Rate | External clock, 2MHz | 6 | µs | ||
| Track/Hold Acquisition Time | 1.5 | µs | |||
| Aperture Delay | 10 | ns | |||
| Aperture Jitter | < 50 | ps | |||
| Internal Clock Frequency | 1.7 | MHz | |||
| External Clock Frequency Range | 0.1 | 2.0 | MHz | ||
| Input Voltage Range | Single-Ended and Differential | V | |||
| Power Supply | +5V (analog), +3V (digital) | V | |||
| Operating Current | Operating Mode | 1.5mA | mA | ||
| Operating Current | Power-Down Mode | 2µA | µA |
Key Features
- 8-channel multiplexer with high-bandwidth track/hold circuitry.
- 12-bit resolution with successive approximation analog-to-digital conversion.
- Serial interface compatible with SPI, MICROWIRE, and TMS320-family digital signal processors, operating up to 2MHz.
- Requires an external reference voltage (MAX1203); the MAX1202 has an internal 4.096V reference.
- Reference-buffer amplifier for simplified gain trim.
- VL pin for setting digital output logic levels (3V, 3.3V, or 5V).
- Software-configurable unipolar/bipolar inputs.
- Hard-wired active-low SHDN pin and two software-selectable power-down modes.
- Available in 20-pin SSOP and PDIP packages.
Applications
- Data-acquisition systems requiring mixed +5V and +3V supply voltages.
- Industrial control and automation.
- Medical devices and diagnostic equipment.
- Aerospace and defense applications.
- Automotive systems, especially those requiring high precision and low power consumption.
Q & A
- What is the resolution of the MAX1203BCPP ADC?
The MAX1203BCPP has a 12-bit resolution.
- What types of input configurations are supported by the MAX1203BCPP?
The MAX1203BCPP supports both unipolar and bipolar input configurations.
- What is the maximum conversion rate of the MAX1203BCPP?
The MAX1203BCPP can convert at a rate of up to 133 ksamples per second (ksps).
- What is the power supply requirement for the MAX1203BCPP?
The MAX1203BCPP operates with a single +5V analog supply or dual ±5V analog supplies, and it also requires a +3V supply for the digital outputs.
- What interface types are supported by the MAX1203BCPP?
The MAX1203BCPP supports SPI, MICROWIRE, and TMS320-family digital signal processor interfaces.
- Does the MAX1203BCPP have an internal reference voltage?
No, the MAX1203BCPP requires an external reference voltage.
- What are the available package types for the MAX1203BCPP?
The MAX1203BCPP is available in 20-pin SSOP and PDIP packages.
- How does the MAX1203BCPP manage power consumption?
The MAX1203BCPP has two software-selectable power-down modes and can be shut down between conversions to optimize supply currents.
- What is the typical operating current of the MAX1203BCPP in operating mode?
The typical operating current is 1.5 mA in operating mode and 2 µA in power-down mode.
- Can the MAX1203BCPP be used in high-temperature environments?
Yes, the MAX1203BCPP is specified for both commercial and extended temperature ranges.
