Overview
The AD7641BSTZ is an 18-bit, 2 MSPS (Mega Samples Per Second), charge redistribution Successive Approximation Register (SAR) analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This fully differential ADC operates from a single 2.5 V power supply and features high-speed sampling, an internal conversion clock, an internal reference with a buffer, error correction circuits, and both serial and parallel system interface ports. The AD7641 is designed for applications requiring high accuracy and speed, with hardware factory calibration to ensure optimal performance across various parameters such as signal-to-noise ratio (SNR), total harmonic distortion (THD), gain, offset, and linearity.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | 18 Bits | ||||
| Analog Input Voltage Range | -VREF | +VREF | V | ||
| Operating Input Voltage | -0.1 V | AVDD + 1 V | V | ||
| Analog Input CMRR | fIN = 100 kHz | 58 dB | |||
| Input Current | 2 MSPS throughput | 18 μA | |||
| Throughput Speed | Wideband warp, warp modes | 500 ns | |||
| Throughput Rate | Wideband warp, warp modes | 2 MSPS | |||
| Supply Voltage | 2.37 V | 2.5 V | 2.63 V | V | |
| Operating Temperature | -40°C | +85°C | °C | ||
| Package | 48-LQFP |
Key Features
- High-Speed Sampling: The AD7641 features two high sampling rate modes (wideband warp and warp) and a fast mode (normal) for asynchronous rate applications, with a throughput rate of up to 2 MSPS.
- Internal Reference: It includes a 2.048 V internal reference with a typical drift of ±10 ppm/°C and an on-chip temperature sensor.
- Single-Supply Operation: Operates from a single 2.5 V power supply, compatible with 2.5 V, 3.3 V, or 5 V logic.
- Versatile Interface: Offers both serial and parallel system interface ports, including SPI and parallel (16- or 8-bit bus) interfaces.
- High Accuracy: Features superior linearity with no missing 18-bit codes, and an integral nonlinearity (INL) of 3 LSB typical.
- Low Power Consumption: With a power dissipation of 92 mW and a nominal supply current of 23 mA.
Applications
- Automated Test Equipment (ATE): The high speed and accuracy of the AD7641 make it suitable for use in automated test equipment.
- Communications: Ideal for applications in communication systems where high-speed data conversion is required.
- Medical Devices: Can be used in medical imaging and diagnostic equipment due to its high resolution and accuracy.
- Industrial Control Systems: Suitable for industrial control and monitoring systems that require precise and fast data conversion.
Q & A
- What is the resolution of the AD7641BSTZ ADC?
The AD7641BSTZ has an 18-bit resolution with no missing codes.
- What is the maximum sampling rate of the AD7641BSTZ?
The maximum sampling rate is 2 MSPS in wideband warp and warp modes.
- What is the operating supply voltage range for the AD7641BSTZ?
The operating supply voltage range is from 2.37 V to 2.63 V.
- What types of interfaces does the AD7641BSTZ support?
The AD7641BSTZ supports both serial (SPI) and parallel (16- or 8-bit bus) interfaces.
- What is the typical signal-to-noise ratio (SNR) of the AD7641BSTZ?
The typical SNR is 93.5 dB at 20 kHz.
- What is the operating temperature range for the AD7641BSTZ?
The operating temperature range is from -40°C to +85°C.
- What is the package type of the AD7641BSTZ?
The AD7641BSTZ is available in a 48-lead Low Profile Quad Flat Package (LQFP).
- Does the AD7641BSTZ have an internal reference?
Yes, it includes a 2.048 V internal reference with a typical drift of ±10 ppm/°C and an on-chip temperature sensor.
- What is the power dissipation of the AD7641BSTZ?
The power dissipation is 92 mW.
- Is the AD7641BSTZ RoHS compliant?
Yes, the AD7641BSTZ is RoHS compliant.
