Overview
The DAC8408FSZ-REEL, produced by Analog Devices Inc., is a monolithic quad 8-bit multiplying digital-to-analog CMOS converter. This device features four independent DACs, each with its own reference input, feedback resistor, and onboard data latches that support read/write capability. The readback function serves as memory for systems requiring self-diagnostics. The DAC8408 is designed to operate on a single +5 volt supply, dissipating less than 20 mW, and is compatible with most 8-bit microprocessors such as the 6800, 8080, 8085, and Z80. It is manufactured using highly stable, thin-film resistors on an advanced oxide-isolated, silicon-gate, CMOS process, ensuring high reliability and performance.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Resolution | N | - | 8 Bits | - | - | - |
| Nonlinearity (INL) | - | - | ±1/4 LSB (A/E/G), ±1/2 LSB (B/F/H) | - | - | - |
| Differential Nonlinearity (DNL) | - | - | ±1/2 LSB (A/E/G), ±1 LSB (B/F/H) | - | - | - |
| Gain Error | GFSE | - | ±1 LSB | - | - | - |
| Gain Tempco | TCGFS | - | ±2 ppm/°C | - | ±40 ppm/°C | - |
| Power Supply Voltage | VDD | - | 4.5 V | 5.5 V | - | V |
| Supply Current | IDD | TA = +25°C | 1.0 mA | - | 1.5 mA | mA |
| Settling Time | - | - | - | 250 ns | - | ns |
| Operating Temperature | TA | - | -40°C | - | 85°C | °C |
| Package | - | - | 28-Lead SOIC (Wide) | - | - | - |
Key Features
- Quad 8-bit multiplying digital-to-analog converters with independent reference inputs and feedback resistors.
- Onboard data latches with read/write capability for self-diagnostics.
- Bus compatible with most 8-bit microprocessors (e.g., 6800, 8080, 8085, Z80).
- Single +5 volt supply operation with low power dissipation (< 20 mW).
- High stability due to thin-film resistors on an advanced CMOS process.
- No need for external protective Schottky diodes due to improved latch-up resistant design.
Applications
- Voltage set points in automatic test equipment systems requiring data access for self-diagnostics.
- Industrial automation and multichannel microprocessor-controlled systems.
- Digitally controlled op-amp offset adjustment.
- Process control and digital attenuators.
Q & A
- What is the resolution of the DAC8408? The DAC8408 has a resolution of 8 bits.
- How many DACs are integrated into the DAC8408? The DAC8408 features four independent DACs.
- What is the operating voltage range of the DAC8408? The DAC8408 operates on a single +5 volt supply.
- What is the typical supply current of the DAC8408 at room temperature? The typical supply current is 1.0 mA at TA = +25°C.
- What is the settling time of the DAC8408? The settling time is 250 ns.
- Is the DAC8408 RoHS compliant? No, the DAC8408 contains lead and is RoHS non-compliant.
- What are the common applications of the DAC8408? Common applications include automatic test equipment, industrial automation, and process control.
- How does the DAC8408 handle data loading and readback? Data is loaded through a common 8-bit TTL/CMOS compatible input port, and can be read back onto the same data bus using control lines.
- What is the operating temperature range of the DAC8408? The operating temperature range is -40°C to +85°C.
- What package types are available for the DAC8408? Available packages include 28-Lead SOIC (Wide), PDIP, and PLCC.
