AD7960BCPZ

Overview

The AD7960BCPZ is an 18-bit, 5 MSPS PulSAR differential analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features a charge redistribution successive approximation register (SAR) architecture with no pipeline latency. The device supports true differential analog inputs ranging from ±4.096 V to ±5 V and operates on dual supplies of 5 V and 1.8 V. Key performance metrics include a signal-to-noise ratio (SNR) of 99 dB, total harmonic distortion (THD) of −117 dB, integral nonlinearity (INL) of ±0.8 LSB typical, and differential nonlinearity (DNL) of ±0.5 LSB typical. Power consumption is 39 mW in self-clocked mode with an external reference buffer. It utilizes a serial LVDS interface for data output and is housed in a 32-lead LFCSP package.

Feature Summary

• High-resolution 18-bit SAR architecture providing unmatched noise and linearity performance without pipeline delay.
• Integrated internal reference buffer supporting external reference voltages of 2.048 V, 4.096 V, or 5 V.
• Flexible conversion control via CMOS or LVDS CNV± signals with selectable self-clocked or echoed clock modes.
• Low power dissipation optimized for high-speed precision applications.

Applications

• Digital imaging systems
• Digital X-rays
• Computed tomography
• MRI gradient control
• High speed data acquisition

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature range specifications. Ensure compatibility with required supply voltages and reference configurations before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high linearity and low noise at moderate sampling rates. Consider the internal reference buffer if board space is limited; otherwise, use an external reference for potentially lower power consumption. Verify that the host system supports LVDS signaling for the data interface.

Part Context

The AD7960 belongs to the PulSAR family of ADCs from Analog Devices, designed for precision data acquisition. It complements other models like the AD7961 and AD7982 within the same series, offering a balance between resolution, speed, and power efficiency suitable for industrial and medical instrumentation.

Replacement Considerations

Direct substitutes within the same family include the AD7960BCPZ-RL7, which shares identical electrical characteristics but differs in packaging format as a reel product rather than cut tape.

FAQ

What is the maximum input bandwidth of the AD7960?

The -3 dB input bandwidth is 28 MHz when EN2 is set to 0. Setting EN2 to 1 reduces the bandwidth to 9 MHz for throughput rates of 2 MSPS or lower.

How does the AD7960 handle conversion control signals?

The CNV+ and CNV- pins can accept either CMOS or LVDS format signals. When CNV- is grounded, CNV+ functions as a single-ended CMOS input.

What are the available reference voltage options?

The device supports an internal reference buffer driven by a 2.048 V external reference, or direct external references of 4.096 V or 5 V applied to the REF pin.