DAC08 8-Bit Monolithic Digital-to-Analog Converter

Overview

The DAC08 series is a family of high-performance, low-cost 8-bit monolithic digital-to-analog converters (DACs) designed for applications requiring fast settling times and precision analog output. These devices combine excellent linearity with wide operating voltage ranges, making them suitable for diverse industrial, communications, and instrumentation applications. The DAC08 eliminates the need for full-scale trimming in most applications due to its prematched reference and full-scale current characteristics.

Key Features

• High-Speed Performance: 85 ns fast settling output current
• Precision Matched Current: Prematched to ±1 LSB for accuracy
• Wide Logic Compatibility: Direct interface with TTL, CMOS, ECL, HTL, and PMOS
• Excellent Linearity: Maximum nonlinearity of 0.1% over temperature range
• High Output Compliance: Output impedance supports -10V to +18V range
• Complementary Outputs: Provides both normal and complementary current outputs
• Multiplying Capability: 1 MHz bandwidth for wide-range multiplication
• Low Drift: Full-scale current drift of ±10 ppm/°C
• Flexible Power Supply: Operates from ±4.5V to ±18V
• Low Power Consumption: 33 mW at ±5V
• Cost-Effective: Competitive pricing with high performance
• Die Form Available: For custom integration solutions

Applications

The DAC08 is suitable for a wide range of applications including:

• High-speed process control systems
• Automatic test equipment (ATE)
• Digital waveform generation
• Precision instrumentation
• Analog modulation systems
• Programmable power supplies
• CRT display systems
• Data acquisition systems
• Industrial automation
• Communications equipment

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V+ to V-): ±18V
• Reference Input Voltage: ±18V
• Digital Input Voltage: -0.3V to +18V
• Output Compliance Voltage: -10V to +18V
• Power Dissipation: 500 mW
• Operating Temperature Range: -55°C to +125°C
• Storage Temperature Range: -65°C to +150°C

Typical Performance Characteristics

• Resolution: 8 bits
• Linearity Error: ±0.1% FSR maximum
• Full-Scale Current: 2 mA nominal
• Full-Scale Current Drift: ±10 ppm/°C
• Settling Time: 85 ns to ±0.1% FSR
• Reference Input Resistance: 5 kΩ
• Output Capacitance: 15 pF
• Power Supply Rejection: ±0.01% FSR/V
• Logic Input Levels:
  • TTL: 0.8V (max) low, 2.0V (min) high
  • CMOS: 30% VDD (max) low, 70% VDD (min) high

Package Information

Available Packages

• 16-Pin Ceramic DIP (DAC08H)
  • Package Code: H
  • Dimensions: 0.780" x 0.350"
  • Lead Pitch: 0.100"
  • Operating Temperature: -55°C to +125°C
• 16-Pin Plastic DIP (DAC08P)
  • Package Code: P
  • Dimensions: 0.750" x 0.300"
  • Lead Pitch: 0.100"
  • Operating Temperature: 0°C to +70°C
• 20-Pin LCC (DAC08E)
  • Package Code: E
  • Dimensions: 0.350" x 0.350"
  • Lead Pitch: 0.050"
  • Operating Temperature: -55°C to +125°C
• Die Form (DAC08D)
  • Package Code: D
  • Dimensions: 0.120" x 0.120"
  • Thickness: 0.015"
  • Backside Metallization: Gold

Pin Configuration (16-Pin DIP)

• Pin 1: VLC (Logic Control Voltage)
• Pin 2: Bit 1 (LSB)
• Pin 3: Bit 2
• Pin 4: Bit 3
• Pin 5: Bit 4
• Pin 6: Bit 5
• Pin 7: Bit 6
• Pin 8: Bit 7
• Pin 9: Bit 8 (MSB)
• Pin 10: V- (Negative Supply)
• Pin 11: IOUT (Current Output)
• Pin 12: IOUT (Complementary Current Output)
• Pin 13: VREF (Reference Input)
• Pin 14: R-14 (Reference Resistor)
• Pin 15: COMP (Compensation)
• Pin 16: V+ (Positive Supply)

Design Considerations

Reference Input Configuration

The DAC08 features a flexible reference input that can accept both positive and negative voltages. For optimal performance:

• Use a low-noise, stable reference voltage source
• Maintain reference input voltage within specified limits
• Consider using a buffer amplifier for high-impedance reference sources

Output Configuration

The current outputs can be converted to voltage outputs using an operational amplifier:

• For IOUT: Connect to op-amp inverting input with feedback resistor
• For IOUT: May be grounded or used for differential output
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