AD7484 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD7484
Manufacturer

ADI
ChipWorker Part#

CW543107217
Description

14Bit, 3MSPS SAR ADC
Documentation

Datasheet

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AD7484 Specifications

Attribute	Attribute Value

Part Number	AD7484
Manufacturer	ADI
ChipWorker Part#	CW543107217
Documentation	Datasheet
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Product Lifecycle Status	Unknown

Product Description

Product Details
The AD7484 is a 14-bit, high speed, low power, successive approximation ADC. The part features a parallel interface with throughput rates up to 3 MSPS. The part contains a low noise, wide bandwidth track-and-hold that can handle input frequencies in excess of 40 MHz.
The conversion process is a proprietary algorithmic successive approximation technique that results in no pipeline delays. The input signal is sampled, and a conversion is initiated on the falling edge of the CONVST signal. The conversion process is controlled by an internally trimmed oscillator. Interfacing is via standard parallel signal lines, making the part directly compatible with microcontrollers and DSPs.
The AD7484 provides excellent ac and dc performance specifica-tions. Factory trimming ensures high dc accuracy, resulting in very low INL, offset, and gain errors.
The part uses advanced design techniques to achieve very low power dissipation at high throughput rates. Power consumption in the normal mode of operation is 90 mW. There are two power saving modes: a nap mode, which keeps the reference circuitry alive for a quick power-up while consuming 2.5 mW, and a standby mode that reduces power consumption to a mere 10 μW.
The AD7484 features an on-board 2.5 V reference but can also accommodate an externally provided 2.5 V reference source. The nominal analog input range is 0 V to 2.5 V, but an offset shift capability allows this nominal range to be offset by ±200 mV. This allows the user considerable flexibility in setting the bottom end reference point of the signal range, a useful feature when using single-supply op amps.
The AD7484 also provides an 8% overrange capability via a 15th bit. Therefore, if the analog input range strays outside the nominal range by up to 8%, the user can still accurately resolve the signal by using the 15th bit.
The AD7484 is powered by a 4.75 V to 5.25 V supply. The part also provides a VDRIVE pin that allows the user to set the voltage levels for the digital interface lines. The range for this VDRIVE pin is 2.7 V to 5.25 V. The part is housed in a 48-lead LQFP package and is specified over a −40°C to +85°C temperature range.
Data Sheet, Rev. B, 8/08
### Features and Benefits
Fast throughput rate: 3 MSPS
Wide input bandwidth: 40 MHz
No pipeline delays with SAR ADC
Excellent DC accuracy performance
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Two parallel interface modes
Low power: 90 mW (full power) and 2.5 mW (nap mode)
Standby mode: 2 μA maximum
See Data Sheet for Additional Information
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