Overview
The PCF8591T/2,518 is a single-chip, single-supply low-power 8-bit CMOS data acquisition device produced by NXP Semiconductors. This device is designed for a wide range of applications requiring analog-to-digital (A/D) and digital-to-analog (D/A) conversions. It features a serial I²C-bus interface, making it versatile for various embedded systems and microcontroller-based projects.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 2.5 | - | 6.0 | V |
| Supply Current (IDD) - Standby | - | 1 | 15 | μA |
| Supply Current (IDD) - Operating (AOUT off) | - | 125 | 250 | μA |
| Supply Current (IDD) - Operating (AOUT active) | - | 0.45 | 1.0 | mA |
| Power-on Reset Voltage (VPOR) | 0.8 | - | 2.0 | V |
| Operating Temperature (Tamb) | -40 | - | 85 | °C |
| Storage Temperature (Tstg) | -65 | - | 150 | °C |
| Analog Input Voltage Range | VSS | - | VDD | V |
| Number of Analog Inputs | - | - | 4 | - |
| Number of Analog Outputs | - | - | 1 | - |
| I²C-bus Speed | - | - | 100 kHz | - |
Key Features
- Single power supply: 2.5 V to 6.0 V
- Low standby current
- Serial input and output via I²C-bus
- I²C address selection by 3 hardware address pins (A0, A1, A2)
- Max sampling rate given by I²C-bus speed
- 4 analog inputs configurable as single-ended or differential inputs
- Auto-incremented channel selection
- Analog voltage range from VSS to VDD
- On-chip track and hold circuit
- 8-bit successive approximation A/D conversion
- Multiplying DAC with one analog output
Applications
- Supply monitoring
- Reference setting
- Analog control loops
Q & A
- What is the PCF8591T/2,518? The PCF8591T/2,518 is a single-chip, single-supply low-power 8-bit CMOS data acquisition device with four analog inputs, one analog output, and a serial I²C-bus interface.
- What is the operating supply voltage range of the PCF8591T/2,518? The operating supply voltage range is from 2.5 V to 6.0 V.
- How many analog inputs and outputs does the PCF8591T/2,518 have? It has four analog inputs and one analog output.
- What is the maximum sampling rate of the PCF8591T/2,518? The maximum sampling rate is given by the maximum speed of the I²C-bus, which can be up to 100 kHz.
- Can the analog inputs be configured as differential inputs? Yes, the four analog inputs can be configured as single-ended or differential inputs.
- What is the purpose of the three hardware address pins (A0, A1, A2)? These pins are used for programming the hardware address, allowing up to eight devices to be connected to the I²C-bus without additional hardware.
- What is the operating temperature range of the PCF8591T/2,518? The operating temperature range is from -40°C to 85°C.
- What is the storage temperature range of the PCF8591T/2,518? The storage temperature range is from -65°C to 150°C.
- Does the PCF8591T/2,518 have an on-chip track and hold circuit? Yes, it includes an on-chip track and hold circuit.
- What type of A/D conversion does the PCF8591T/2,518 use? It uses 8-bit successive approximation A/D conversion.
