Overview
The AD7845JPZ-REEL, produced by Analog Devices Inc., is a 12-bit multiplying digital-to-analog converter (DAC) that integrates an on-chip amplifier. This device is fabricated using the LC2MOS process, enabling the implementation of precision linear components and digital circuitry on the same chip. It features a 4-quadrant multiplication capability, making it versatile for various applications. The AD7845 is available in several package types, including the 28-lead PLCC (Plastic Leaded Chip Carrier) for the AD7845JPZ-REEL variant.
Key Specifications
| Parameter | Value | Units | Comments |
|---|---|---|---|
| Number of Bits | 12 | - | - |
| Resolution | 1 LSB = VREF / 2^12 = 2.4 mV | mV | Relative Accuracy |
| Supply Voltage (Analog) | ±14.25 V to ±15.75 V | V | Nominal ±15 V |
| Output Voltage Range | ±10 V | V | Into a 2 kΩ load |
| Settling Time | 5 µs | µs | To 0.01% FSR (1/2 LSB) |
| Input Offset Voltage | Low due to laser trimming | - | - |
| Slew Rate | Typically 11 V/µs | V/µs | - |
| Operating Temperature | 0°C to 70°C | °C | - |
| Package Type | 28-PLCC (J-Lead) | - | - |
| Mounting Type | Surface Mount | - | - |
| INL/DNL (LSB) | ±1 (Max) | LSB | - |
Key Features
- 12-Bit CMOS MDAC with Output Amplifier: Provides high resolution and precision.
- 4-Quadrant Multiplication: Enables multiplication in all four quadrants.
- Guaranteed Monotonic: Ensures monotonic behavior over the entire temperature range.
- Space-Saving Packages: Available in 24-lead DIP, 28-terminal LCC, PLCC, and 24-terminal SOIC packages.
- On-Chip Application Resistors: For gain ranging and other applications.
- Low Power LC2MOS Technology: Reduces power consumption while maintaining performance.
- Internally Compensated Output Amplifier: Supplies ±10 V into a 2 kΩ load with low input offset voltage.
- TTL and 5 V CMOS Compatible Digital Inputs: Facilitates easy microprocessor interfacing.
Applications
- Automatic Test Equipment: For precise signal generation.
- Digital Attenuators: To control signal levels accurately.
- Programmable Power Supplies: For adjustable voltage output.
- Programmable Gain Amplifiers: To adjust gain levels dynamically.
- Digital-to-4–20 mA Converters: For industrial control and monitoring systems.
Q & A
- What is the resolution of the AD7845JPZ-REEL?
The resolution of the AD7845JPZ-REEL is 12 bits, with 1 LSB equal to VREF / 2^12 = 2.4 mV.
- What is the output voltage range of the AD7845JPZ-REEL?
The output voltage range is ±10 V into a 2 kΩ load.
- What is the settling time of the AD7845JPZ-REEL?
The settling time is 5 µs to 0.01% FSR (1/2 LSB).
- Is the AD7845JPZ-REEL compatible with microprocessors?
- What are the typical applications of the AD7845JPZ-REEL?
Typical applications include automatic test equipment, digital attenuators, programmable power supplies, programmable gain amplifiers, and digital-to-4–20 mA converters.
- What is the operating temperature range of the AD7845JPZ-REEL?
The operating temperature range is 0°C to 70°C.
- What package types are available for the AD7845?
The AD7845 is available in 24-lead DIP, 28-terminal LCC, PLCC, and 24-terminal SOIC packages.
- Is the AD7845JPZ-REEL RoHS compliant?
- What is the slew rate of the output amplifier in the AD7845JPZ-REEL?
The slew rate is typically 11 V/µs.
- How does the AD7845JPZ-REEL achieve low input offset voltage?
The input offset voltage is low due to laser trimming at the wafer level.
