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AD7840JP-REEL
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Product Detailed Parameters
- Description：IC DAC 14BIT V-OUT 28PLCC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：14
- Number of D/A Converters：1
- Settling Time：4µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：Parallel, Serial
- Reference Type：External, Internal
- Voltage - Supply, Analog：±5V
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：±2 (Max), ±0.9 (Max)
- Architecture：R-2R
- Operating Temperature：0°C ~ 70°C
- Package / Case：28-LCC (J-Lead)
- Supplier Device Package：28-PLCC (11.51x11.51)
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The AD7840JP-REEL is a complete 14-bit CMOS digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It integrates a 14-bit DAC, a 3 V buried Zener reference, a DAC output amplifier, and high-speed control logic on a single chip. The device operates from ±5 V supplies with typical power consumption of 70 mW. It supports both parallel and serial interface modes, enabling compatibility with high-speed DSP processors such as the ADSP-2100 and TMS320 series. The component delivers an 80 dB signal-to-noise ratio and features a minimum write pulse width of 45 ns.
Feature Summary
- Complete 14-bit voltage output DAC with integrated 3 V reference and output amplifier
- Dual interface capability supporting both parallel and serial data formats
- High-speed operation with 45 ns minimum WR pulse width for DSP integration
- Low power consumption of 70 mW typ. operating from ±5 V supplies
Applications
- High-speed digital signal processing systems requiring fast DAC updates
- Industrial process control loops utilizing DSP-based controllers
- Precision instrumentation requiring 14-bit resolution and low noise
- Audio and video signal generation circuits
Part Context
The AD7840 belongs to Analog Devices' LC2MOS family of complete DACs. This technology combines bipolar and CMOS processes to achieve high speed and low power. The 'JP' suffix indicates a plastic DIP package variant, while '-REEL' specifies tape-and-reel packaging for automated surface-mount assembly. It serves as a monolithic solution replacing discrete DAC and reference components in space-constrained designs.
Replacement Considerations
Direct pin-compatible replacements within the same LC2MOS family include the AD7840JN (DIP-24) or AD7840KP (PLCC-28). For applications requiring higher resolution, the AD7871 (14-bit ADC) or AD7846 (16-bit DAC) may be considered, though interface and pinout differences require schematic review. Verify that the replacement package matches the PCB footprint and that supply voltage requirements remain compatible.
