Overview
The AD7381BCPZ, produced by Analog Devices Inc., is a 14-bit dual simultaneous sampling, high-speed, low-power successive approximation register (SAR) analog-to-digital converter (ADC). This device operates from a 3.0 V to 3.6 V power supply and features throughput rates up to 4 MSPS. It is part of the AD7380/AD7381 family, which is known for its high performance and versatility in various applications.
The AD7381 is housed in a 16-lead lead frame chip scale package (LFCSP) with dimensions of 3 mm x 3 mm x 0.75 mm, and it operates over a temperature range of −40°C to +125°C. The device includes an integrated on-chip oversampling block that enhances dynamic range and reduces noise at lower bandwidths, and it also features a buffered internal 2.5 V reference or an external reference option up to 3.3 V.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | - | 14-bit | - | - |
| Throughput Rate | - | - | 4 MSPS | - |
| Power Supply | 3.0 V | 3.3 V | 3.6 V | V |
| Logic Supply | 1.65 V | - | 3.6 V | V |
| Analog Input Type | Differential | - | - | - |
| Analog Input Voltage Range | -VREF | - | +VREF | V |
| Common-Mode Input Range | 0.2 VREF - 0.2 | - | VREF - 0.2 | V |
| Input Bandwidth | - | - | 6 MHz | - |
| Power Dissipation (Normal Mode) | 71 mW | - | 94 mW | mW |
| Operating Temperature | -40°C | - | +125°C | °C |
Key Features
- Dual simultaneous sampling capability, allowing for the conversion of two analog inputs simultaneously.
- High-speed operation with throughput rates up to 4 MSPS.
- Low power consumption, making it suitable for power-sensitive applications.
- Integrated on-chip oversampling block to improve dynamic range and reduce noise at lower bandwidths.
- Buffered internal 2.5 V reference or external reference option up to 3.3 V.
- Wide common-mode input voltage range and high common-mode rejection ratio (CMRR).
- Flexible SPI interface and alert function for enhanced system integration.
- Compatibility with 1.8 V, 2.5 V, and 3.3 V interfaces using a separate logic supply.
- Compact 16-lead LFCSP package with dimensions of 3 mm x 3 mm x 0.75 mm.
Applications
- Motor control position feedback (encoders).
- Motor control current sense.
- Sonar systems.
- Power quality meters.
- Erbium doped fiber amplifier (EDFA) applications.
- I and Q demodulation.
- General-purpose data acquisition systems.
Q & A
- What is the resolution of the AD7381BCPZ?
The AD7381BCPZ has a resolution of 14 bits.
- What is the maximum throughput rate of the AD7381BCPZ?
The maximum throughput rate is up to 4 MSPS.
- What is the power supply range for the AD7381BCPZ?
The device operates from a 3.0 V to 3.6 V power supply.
- What type of analog input does the AD7381BCPZ support?
The AD7381BCPZ supports differential analog inputs.
- Does the AD7381BCPZ have an integrated reference?
Yes, it includes a buffered internal 2.5 V reference, and an external reference up to 3.3 V can also be used.
- What is the operating temperature range of the AD7381BCPZ?
The device operates over a temperature range of −40°C to +125°C.
- What package type is the AD7381BCPZ available in?
The AD7381BCPZ is available in a 16-lead lead frame chip scale package (LFCSP) with dimensions of 3 mm x 3 mm x 0.75 mm.
- What are some common applications of the AD7381BCPZ?
Common applications include motor control, sonar systems, power quality meters, EDFA applications, and general-purpose data acquisition systems.
- Does the AD7381BCPZ support multiple logic supply voltages?
Yes, it supports 1.8 V, 2.5 V, and 3.3 V interfaces using a separate logic supply.
- What is the purpose of the integrated oversampling block in the AD7381BCPZ?
The integrated oversampling block improves dynamic range and reduces noise at lower bandwidths.
