AM6012

AM6012: 12-Bit Multiplying Digital-to-Analog Converter (DAC)

Overview

The AM6012 is a high-performance 12-bit multiplying Digital-to-Analog Converter (DAC) designed for precision applications requiring fast settling times and high linearity. It features a trimless design, ensuring cost-effectiveness while maintaining high accuracy (±0.05%) and monotonicity over temperature. The device is optimized for high-speed operation with a typical settling time of 250ns, making it suitable for dynamic applications such as CRT displays, robotics, and automated test equipment. The AM6012 provides differential current outputs with a full-scale current of 4mA (when using a 1mA reference) and supports a wide output compliance voltage range of -5V to +10V.

Features

• 12-bit resolution for high-precision analog output.
• High accuracy with ±0.05% full-scale error.
• Monotonic performance guaranteed over the full operating temperature range.
• Fast settling time of 250ns (typical), enabling high-speed signal generation.
• Trimless design reduces manufacturing costs without compromising performance.
• Differential current outputs for flexible system integration.
• High-speed multiplying capability supports dynamic reference voltage changes.
• Full-scale current of 4mA (with 1mA reference input).
• High output compliance voltage (-5V to +10V) for compatibility with various loads.
• Low power consumption of 230mW, making it suitable for power-sensitive applications.

Applications

The AM6012 is ideal for a wide range of industrial, automotive, and instrumentation applications, including:

• CRT displays and computer graphics – High-speed DACs are essential for accurate pixel rendering.
• Robotics and machine tools – Precision motion control requires stable analog outputs.
• Automatic test equipment (ATE) – Fast settling times ensure accurate signal generation.
• Programmable power supplies – The multiplying DAC allows dynamic voltage adjustment.
• CAD/CAM systems – High linearity ensures precise control of mechanical components.
• Data acquisition and control systems – The differential outputs improve noise immunity.
• Analog-to-digital converter (ADC) systems – Used in feedback loops for calibration.

Electrical Characteristics

The following table summarizes the key electrical specifications of the AM6012:

• Resolution: 12 bits
• Differential Nonlinearity (DNL): ±0.025% (max)
• Full-Scale Error: ±0.05% (max)
• Settling Time: 250ns (typical)
• Reference Input Current (I_REF): 1.25mA (max)
• Output Compliance Voltage: -5V to +10V
• Power Supply Voltage (V_S): ±18V (max)
• Power Consumption: 230mW (typical)

Absolute Maximum Ratings

Exceeding these values may cause permanent damage to the device:

• Operating Temperature (T_A): 0°C to +70°C (AM6012F)
• Storage Temperature (T_STG): -65°C to +150°C
• Lead Soldering Temperature (T_SOLD): 300°C (10 sec max)
• Power Supply Voltage (V_S): ±18V
• Logic Input Voltage: -5V to +18V
• Current Output Voltage: -8V to +12V
• Reference Input Differential Voltage: ±18V
• Maximum Power Dissipation (P_D): 1560mW (F package, still air)

Package Information

The AM6012 is available in two package options:

• 20-Pin Ceramic Dual In-Line Package (CERDIP) – Order Code: AM6012F, Drawing #0584B
• 20-Pin Plastic Small Outline Large (SOL) Package – Order Code: AM6012D, Drawing #0172D

Note: The SOL package is the only available option for the AM6012D variant.

Pin Configuration (Top View)

• Pin 1: D1 (Data Input, MSB)
• Pin 2: D2
• Pin 3: D3
• Pin 4: D4
• Pin 5: D5
• Pin 6: D6
• Pin 7: D7
• Pin 8: D8
• Pin 9: D9
• Pin 10: D10
• Pin 11: I_O (Current Output)
• Pin 12: I_O (Complementary Current Output)
• Pin 13: V_- (Negative Supply)
• Pin 14: COMP (Compensation)
• Pin 15: V_REF(-) (Negative Reference Input)
• Pin 16: V_REF(+) (Positive Reference Input)
• Pin 17: GND/V_LC (Ground/Logic Control)
• Pin 18: D11 (Data Input)
• Pin 19: D12 (Data Input, LSB)
• Pin 20: V₊ (Positive Supply)

Block Diagram Description

The AM6012 integrates several key functional blocks:

• Bias Network & Reference Amplifier: Ensures stable biasing for internal circuitry.
• 9-Segment Generator & Decoder: Enhances linearity by segmenting the DAC into smaller sections.
• Current Switches & 9-Bit R-2R Ladder: Provides the core DAC conversion mechanism.
• Logic Switches: Control the digital input interface.