Analog Devices Inc. AD7470ARU-REEL7

Overview

AD7470ARU-REEL7 from Analog Devices is a 10-bit, 1.75 MSPS successive approximation analog-to-digital converter (ADC) with parallel interface, operating from a single 2.7 V to 5.25 V supply. It features 33 pF input capacitance, ±1 LSB integral nonlinearity, and 70 dB typical SNR at 500 kHz input frequency - used in high-speed data acquisition systems requiring low-latency sampling without pipeline delay.

For engineers reviewing the AD7470ARU-REEL7 datasheet, AD7470ARU-REEL7 pinout, AD7470ARU-REEL7 application, or AD7470ARU-REEL7 equivalent, key selection considerations include its 12-clock-cycle conversion time, 531 ns BUSY-to-data-read timing window, 24-lead TSSOP package with separate analog/digital grounds, and support for external 2.5 V reference with ±1% tolerance.

Technical Context

The AD7470ARU-REEL7 implements a standard successive approximation register (SAR) architecture with track-and-hold amplifier, enabling precise sampling control via CONVST falling edge and zero-latency output access. Its conversion is clocked externally (up to 30 MHz at 5 V), eliminating internal PLLs or digital filters that introduce latency or jitter.

All logic inputs (CS, RD, CONVST, CLK IN) accept 2.4 V minimum high and 0.4 V maximum low thresholds across 2.7–5.25 V operation; outputs drive 3-state parallel bus (DB0–DB9) referenced to VDRIVE, allowing independent 3 V/5 V I/O interfacing while AVDD/DVDD remain matched within ±0.3 V.

Key Specifications

Pinout & Package

AD7470ARU-REEL7 is housed in a 24-lead TSSOP (RU-24) package with exposed pad, thermal impedance θJA = 115°C/W. Pin layout separates analog (AVDD, AGND, VIN, REF IN) and digital (DVDD, DGND, CS, RD, DB0–DB9) domains to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit high-speed parallel ADC applications.

Compared with AD7470BRU-REEL7, the AD7470ARU-REEL7 offers identical performance at lower cost for ambient temperatures ≤+85°C; versus ADS8320UB, it provides faster parallel readout and deterministic timing but trades off resolution and interface flexibility.

Availability

AD7470ARU-REEL7 is available at Aetrix Electronics and suitable for industrial motor control, portable instrumentation, medical sensor interface, and communications baseband applications requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.

Supply support for AD7470ARU-REEL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD7470ARU-REEL7 belongs to Analog Devices' precision SAR ADC product line, designed specifically for applications demanding high throughput, low power, and deterministic timing without pipeline latency - targeting industrial automation, test equipment, and portable measurement systems.

FAQ

What is the maximum clock frequency supported by AD7470ARU-REEL7?

The AD7470ARU-REEL7 supports up to 30 MHz CLK IN at 5 V supply and 24 MHz at 3 V supply. At 30 MHz, the 12-clock-cycle conversion yields a 1.75 MSPS throughput rate. Exceeding these frequencies violates timing specifications and may cause conversion errors or increased INL/DNL.

Does AD7470ARU-REEL7 require an external reference voltage?

Yes, AD7470ARU-REEL7 requires a stable 2.5 V ±1% external reference applied to the REF IN pin. The device does not include an internal reference; using a precision buffered 2.5 V source ensures full-scale accuracy and minimizes gain error drift over temperature.

Can AD7470ARU-REEL7 interface directly with a 3 V microcontroller?

Yes, AD7470ARU-REEL7 supports direct 3 V logic interfacing via the VDRIVE pin. Set VDRIVE = 3 V while AVDD/DVDD operate at 5 V to maintain analog performance; DB0–DB9 outputs then swing between 0 V and 2.8 V, compatible with 3 V CMOS inputs.

How does the auto sleep mode work on AD7470ARU-REEL7?

When CONVST remains low after conversion completes, AD7470ARU-REEL7 automatically enters sleep mode, reducing current to 50 nA typical. The next rising edge of CONVST wakes the device in ≤1 µs, after which it is ready for a new conversion - ideal for event-triggered sampling.

Is AD7470ARU-REEL7 pin-compatible with AD7472ARU-REEL7?

No, AD7470ARU-REEL7 and AD7472ARU-REEL7 share the same 24-lead TSSOP package and pinout, but differ in data bus width: AD7470ARU-REEL7 outputs DB0–DB9 (10-bit), while AD7472ARU-REEL7 outputs DB0–DB11 (12-bit). Pins DB10 and DB11 are no-connect on AD7470ARU-REEL7.