Overview
The AD7641BCPZ is an 18-bit, 2 MSPS (Mega Samples Per Second), charge redistribution Successive Approximation Register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This fully differential ADC operates from a single 2.5 V power supply and features a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. The device is hardware factory calibrated and comprehensively tested to ensure both AC and DC parameters such as signal-to-noise ratio (SNR), total harmonic distortion (THD), gain, offset, and linearity. It is available in Pb-free packages with operation specified from −40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | 18 | Bits | |||
| Analog Input Voltage Range | VIN+ − VIN− | −VREF | +VREF | V | |
| Operating Input Voltage | VIN+, VIN− to AGND | −0.1 | AVDD + 0.1 | V | |
| Analog Input CMRR | fIN = 100 kHz | 58 | dB | ||
| Input Current | 2 MSPS throughput | 18 | μA | ||
| Throughput Speed - Complete Cycle (Wideband Warp, Warp modes) | 500 | ns | |||
| Throughput Rate (Wideband Warp, Warp modes) | 2 | MSPS | |||
| Time Between Conversions (Wideband Warp, Warp modes) | 1 | ms | |||
| Complete Cycle (Normal mode) | 667 | ns |
Key Features
- High-speed 18-bit sampling ADC with internal conversion clock and internal reference buffer.
- Single 2.5 V power supply operation with compatibility for 2.5 V, 3.3 V, or 5 V logic.
- Hardware factory calibrated and tested for AC and DC parameters such as SNR, THD, gain, offset, and linearity.
- Versatile interface options including serial and parallel (16- or 8-bit bus) interfaces.
- High sampling rate modes (Wideband Warp, Warp) and a fast mode (Normal) for asynchronous conversion rate applications.
- No missing 18-bit codes, ensuring superior linearity.
- Internal reference with a typical temperature drift of ±10 ppm/°C.
Applications
The AD7641BCPZ is suitable for a variety of high-performance applications, including:
- Automated Test Equipment (ATE).
- Communications systems.
- Industrial control and measurement systems.
- Medical devices requiring high precision and speed.
Q & A
- What is the resolution of the AD7641BCPZ ADC?
The AD7641BCPZ has an 18-bit resolution. - What is the maximum sampling rate of the AD7641BCPZ?
The maximum sampling rate is 2 MSPS in Wideband Warp and Warp modes. - What is the power supply voltage for the AD7641BCPZ?
The AD7641BCPZ operates from a single 2.5 V power supply. - Does the AD7641BCPZ have an internal reference?
Yes, it has a 2.048 V internal reference with a typical temperature drift of ±10 ppm/°C. - What are the interface options for the AD7641BCPZ?
The device features both serial and parallel (16- or 8-bit bus) interfaces. - What is the operating temperature range for the AD7641BCPZ?
The operating temperature range is from −40°C to +85°C. - Is the AD7641BCPZ Pb-free?
Yes, the AD7641BCPZ is available in Pb-free packages. - What are the key calibration and testing aspects of the AD7641BCPZ?
The device is hardware factory calibrated and comprehensively tested for both AC and DC parameters. - Are there any evaluation boards available for the AD7641BCPZ?
Yes, the EVAL-AD7641EDZ is a fully featured evaluation kit for the AD7641. - What are some common applications for the AD7641BCPZ?
Common applications include ATE, communications systems, industrial control, and medical devices.
