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AD7274BUJ-REEL

Description
3MSPS,10-/12-Bit ADCs in 8-Lead TSOT
CategoryAnalog mixed-signal IC    converter   
File Size394KB,28 Pages
ManufacturerADI
Websitehttps://www.analog.com
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AD7274BUJ-REEL Overview

3MSPS,10-/12-Bit ADCs in 8-Lead TSOT

3 MSPS,10-/12-Bit
ADCs in 8-Lead TSOT
AD7273/AD7274
FEATURES
Throughput rate: 3 MSPS
Specified for V
DD
of 2.35 V to 3.6 V
Power consumption
11.4 mW at 3 MSPS with 3 V supplies
Wide input bandwidth
70 dB SNR at 1 MHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface
SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
Temperature range: −40°C to +125°C
Power-down mode: 0.1 μA typ
8-lead TSOT package
8-lead MSOP package
FUNCTIONAL BLOCK DIAGRAM
V
DD
AGND
V
IN
V
REF
T/H
10-/12-BIT
SUCCESSIVE
APPROXIMATION
ADC
SCLK
CONTROL
LOGIC
SDATA
CS
DGND
Figure 1.
GENERAL DESCRIPTION
The AD7273/AD7274 are 10-/12-bit, high speed, low power,
successive approximation ADCs, respectively. The parts operate
from a single 2.35 V to 3.6 V power supply and feature
throughput rates of up to 3 MSPS. Each part contains a low
noise, wide bandwidth track-and-hold amplifier that can handle
input frequencies in excess of 55 MHz.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the devices to interface
with microprocessors or DSPs. The input signal is sampled on
the falling edge of CS, and the conversion is also initiated at this
point. The conversion rate is determined by the SCLK. There
are no pipeline delays associated with these parts.
The AD7273/AD7274 use advanced design techniques to
achieve very low power dissipation at high throughput rates.
The reference for the parts is applied externally and can be in
the range of 1.4 V to V
DD
. This allows the widest dynamic input
range to the ADC.
Table 1.
Part Number
AD7273
1
AD7274
1
AD7276
AD7277
AD7278
1
Resolution
10
12
12
10
8
Package
8-lead MSOP
8-Lead TSOT
8-lead MSOP
8-Lead TSOT
8-lead MSOP
6-Lead TSOT
8-lead MSOP
6-Lead TSOT
8-lead MSOP
6-Lead TSOT
Parts contain external reference pin.
PRODUCT HIGHLIGHTS
1. 3 MSPS ADCs in an 8-lead TSOT package.
2. High throughput with low power consumption.
3. Flexible power/serial clock speed management.
Allows maximum power efficiency at low throughput rates.
4. Reference can be driven up to the power supply.
5. No pipeline delay.
6. The parts feature a standard successive approximation ADC
with accurate control of the sampling instant via a CS input
and once-off conversion control.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
04973-001
AD7273/AD7274

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