Analog Devices Inc. AD7899ARSZ-1REEL

Overview

AD7899ARSZ-1REEL from Analog Devices is a 14-bit, 400 kSPS successive-approximation ADC operating from a single 5 V supply, featuring an integrated 2.5 V reference, track/hold amplifier, and high-speed parallel interface. It supports ±10 V and ±5 V bipolar input ranges, delivers 78 dB SNR at 100 kHz input, and enables precision data acquisition in industrial control and test instrumentation systems.

For engineers reviewing the AD7899ARSZ-1REEL datasheet, AD7899ARSZ-1REEL pinout, AD7899ARSZ-1REEL application, or AD7899ARSZ-1REEL equivalent, key selection criteria include its 2.2 µs conversion time, ±2 LSB INL, 0.3 µs track/hold acquisition, 3 V/5 V logic compatibility via VDRIVE, and overvoltage tolerance up to ±18 V on analog inputs.

Technical Context

The AD7899ARSZ-1REEL implements a laser-trimmed internal clock oscillator (enabling 400 kSPS throughput) or accepts external CLKIN for precise timing control. Its track/hold architecture achieves 500 kHz –0.1 dB full-power bandwidth and 25 ps aperture jitter, ensuring accurate sampling of fast-changing signals without external support circuitry.

Conversion is initiated by CONVST rising edge, which places the track/hold into hold mode and triggers BUSY/EOC assertion. Data is latched onto a 14-bit parallel bus (DB0–DB13) using CS and RD, with access time as low as 35 ns at VDRIVE = 5 V - supporting direct interfacing to microcontrollers and DSPs.

Key Specifications

Pinout & Package

AD7899ARSZ-1REEL is housed in a 28-lead Shrink Small Outline Package (SSOP), RoHS-compliant, with 0.65 mm lead pitch and exposed pad for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit SAR ADC applications.

Compared with AD7899BR-1, AD7899ARSZ-1REEL trades 0.5 LSB linearity for broader temperature qualification (S-grade option available); versus ADS8505IPW, it offers faster throughput and full integration at the cost of 2-bit resolution - making AD7899ARSZ-1REEL optimal for space-constrained, medium-accuracy industrial DAQ.

Availability

AD7899ARSZ-1REEL is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, avionics sensor interface, and high-voltage power monitoring requiring stable component supply across extended temperature ranges.

Supply support for AD7899ARSZ-1REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7899 product line delivers integrated, single-supply SAR ADCs optimized for precision data acquisition in harsh environments - emphasizing robustness, low power, and minimal external component count.

FAQ

What input voltage ranges does the AD7899ARSZ-1REEL support?

The AD7899ARSZ-1REEL supports ±10 V and ±5 V bipolar input ranges. Configuration is achieved by connecting VINB to AGND for ±10 V operation or tying VINA and VINB together for ±5 V operation. The device maintains ±2 LSB INL and 78 dB SNR across both ranges, with overvoltage protection up to ±18 V on analog inputs in the ±10 V mode.

How does the AD7899ARSZ-1REEL handle clocking for conversion?

The AD7899ARSZ-1REEL uses either its internal laser-trimmed oscillator or an external clock applied to CLKIN. On the rising edge of CONVST, a high CLKIN selects external clocking; low selects internal. Internal clock enables guaranteed 400 kSPS throughput with no external components, while external clocking allows synchronization to system timing domains with duty cycle ≤60/40.

What is the function of the VDRIVE pin on the AD7899ARSZ-1REEL?

The VDRIVE pin supplies power to the AD7899ARSZ-1REEL's digital I/O buffers and sets logic threshold levels. It may be tied to 5 V for standard TTL/CMOS compatibility or to 3 V ±10% to interface directly with 3 V microcontrollers and DSPs - enabling mixed-voltage system design without level shifters.

Does the AD7899ARSZ-1REEL include an internal voltage reference?

Yes, the AD7899ARSZ-1REEL integrates a 2.5 V reference with ±10 mV accuracy at 25°C and ±20 mV max error over temperature. The VREF pin provides access to this reference and accepts external 2.5 V ±5% sources to override it - supporting applications requiring tighter reference stability or system-level reference sharing.

What package type and temperature grade is the AD7899ARSZ-1REEL?

The AD7899ARSZ-1REEL is supplied in a 28-lead Shrink Small Outline Package (SSOP) with RoHS-compliant finish and operates over the industrial temperature range of –40°C to +85°C. The "S" suffix in related variants (e.g., AD7899SR-1) denotes military-grade –55°C to +125°C operation, but AD7899ARSZ-1REEL itself is rated for industrial use.