Overview
The AD7643BCPZ is an 18-bit, 1.25 MSPS (mega-samples per second), charge redistribution Successive Approximation Register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single 2.5 V power supply and is known for its high speed and superior linearity. The AD7643 features an internal conversion clock, an internal reference with a buffer, error correction circuits, and both serial and parallel system interface ports. It is hardware factory calibrated to ensure optimal performance in terms of signal-to-noise ratio (SNR), gain, offset, and linearity. The device is available in a 48-lead Lead Frame Chip Scale Package (LFCSP) and is Pb-free, with an operating temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 18 bits | |||
| Sampling Rate | 1.25 MSPS | |||
| Power Supply | 2.5 V ± 5% | V | ||
| Internal Reference Voltage | 2.048 | 2.048 | 2.048 | V |
| Reference Voltage Drift | ±8 ppm/°C | ppm/°C | ||
| Operating Temperature | -40 | 85 | °C | |
| Package Type | 48-Lead LFCSP-VQ (7x7) | |||
Key Features
- Fast Throughput: The AD7643 offers a high sampling rate of 1.25 MSPS, making it suitable for high-speed data acquisition applications.
- Superior Linearity: The device has no missing 18-bit codes, ensuring high accuracy and linearity in conversions.
- Internal Reference: It includes a 2.048 V internal reference with a typical drift of ±8 ppm/°C and an on-chip temperature sensor.
- Single-Supply Operation: The AD7643 operates from a single 2.5 V power supply, simplifying system design.
- No Latency: The device can be used in asynchronous rate applications with no latency).
- Hardware Factory Calibration: Ensures optimal performance in terms of SNR, gain, offset, and linearity).
Applications
- Medical Instruments: Suitable for medical imaging and diagnostic equipment due to its high accuracy and speed).
- High-Speed Data Acquisition: Ideal for applications requiring high dynamic range and fast sampling rates).
- Digital Signal Processing: Used in various DSP applications where high-resolution and fast conversion are necessary).
- Spectrum Analysis: Applicable in spectrum analyzers and other measurement instruments).
- Instrumentation and Communications: Suitable for various instrumentation and communication systems requiring precise and fast ADCs).
- Automated Test Equipment (ATE): Used in automated testing and measurement systems).
Q & A
- What is the resolution of the AD7643BCPZ?
The AD7643BCPZ has an 18-bit resolution).
- What is the sampling rate of the AD7643BCPZ?
The AD7643BCPZ has a sampling rate of 1.25 MSPS).
- What is the power supply voltage for the AD7643BCPZ?
The AD7643BCPZ operates from a single 2.5 V power supply).
- Does the AD7643BCPZ have an internal reference?
Yes, the AD7643BCPZ includes a 2.048 V internal reference with a buffer).
- What is the operating temperature range of the AD7643BCPZ?
The operating temperature range is from −40°C to +85°C).
- What type of package does the AD7643BCPZ come in?
The AD7643BCPZ is available in a 48-Lead LFCSP-VQ (7x7) package).
- Is the AD7643BCPZ Pb-free?
Yes, the AD7643BCPZ is Pb-free).
- What are some common applications of the AD7643BCPZ?
Common applications include medical instruments, high-speed data acquisition, digital signal processing, spectrum analysis, instrumentation, communications, and automated test equipment (ATE)).
- Does the AD7643BCPZ have any latency?
No, the AD7643BCPZ has no latency and can be used in asynchronous rate applications).
- Is the AD7643BCPZ hardware factory calibrated?
Yes, the AD7643BCPZ is hardware factory calibrated to ensure optimal performance).
