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AD7982 Datasheet(PDF) 1 Page - Analog Devices

Part No. AD7982
Description  18-bit, 1 MSPS PulSAR ADC in MSOP/QFN
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7982 Datasheet(HTML) 1 Page - Analog Devices

 
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18-bit, 1 MSPS PulSAR™ ADC in MSOP/QFN
Preliminary Technical Data
AD7982
Rev PrC
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
©2006 Analog Devices, Inc. All rights reserved.
18-bit resolution with no missing codes
Throughput: 1MSPS
Low Power dissipation: 7.5 mW @ 1MSPS, 75 μW @ 10kSPS
INL: ±1 LSB typ, ±2.5 LSB max
Dynamic range: 99 dB
True differential analog input range: ±VREF
0 V to VREF with VREF between 2.5V to 5.0V
Any input range and easy to drive with the ADA4941
No pipeline delay
Single-supply 2.5V operation with 1.8 V/2.5 V/3 V/5 V logic
interface
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
Daisy-chain multiple ADCs and BUSY indicator
10-lead package: MSOP (MSOP-8 size) and
QFN (LFCSP), 3 mm × 3 mm same space as SOT-23
APPLICATIONS
Battery-powered equipment
Data acquisitions
Instrumentation
Medical instruments
Seismic Data Acquisition Systems
Table 1. MSOP, QFN(LFCSP)/SOT-23 14, 16 and18-Bit ADC
Type
100
kSPS
250
kSPS
400-
500
kSPS
1000
kSPS
ADC
Driver
18Bit
AD76911
AD76901
AD79821
ADA4941
ADA4841
16Bit
AD7680
AD7683
AD7684
AD76851
AD76871
AD7694
AD76861
AD76881
AD76931
AD79801
ADA4941
ADA4841
14Bit
AD7940
AD79421
AD79461
1 Pin-for-pin compatible.
APPLICATION DIAGRAM EXAMPLE
AD7982
REF
GND
VDD
IN+
IN–
VIO
SDI
SCK
SDO
CNV
1.8 TO 5V
3- OR 4-WIRE
INTERFACE
(SPI, , CS
DAISY CHAIN)
2.5 TO 5V 2.5V
ADA4941
±10V, ±5V, ..
Figure 1.
GENERAL DESCRIPTION
The AD7982 is a 18-bit, successive approximation, analog-to-
digital converter (ADC) that operates from a single power
supply, VDD. It contains a low power, high speed, 18-bit
sampling ADC and a versatile serial interface port. On the CNV
rising edge, it samples the voltage difference between IN+ and
IN− pins. The voltages on these pins usually swing in opposite
phase between 0 V and REF. The reference voltage, REF, is
applied externally and can be set independently of the supply
voltage, VDD.
Its power scales linearly with throughput.
The SPI-compatible serial interface also features the ability,
using the SDI input, to daisy chain several ADCs on a single,
3-wire bus and provides an optional BUSY indicator. It is
compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate
supply VIO.
The AD7982 is housed in a 10-lead MSOP or a 10-lead QFN
(LFCSP) with operation specified from −40°C to +85°C.


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