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AD7982

Analog Devices
Part Number AD7982
Manufacturer Analog Devices
Description 1 MSPS PulSAR ADC
Published Jan 5, 2007
Detailed Description www.DataSheet4U.com 18-bit, 1 MSPS PulSAR™ ADC in MSOP/QFN Preliminary Technical Data 18-bit resolution with no missing...
Datasheet PDF File AD7982 PDF File

AD7982
AD7982

Overview
www.
DataSheet4U.
com 18-bit, 1 MSPS PulSAR™ ADC in MSOP/QFN Preliminary Technical Data 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 2.
5 TO 5V 2.
5V AD7982 APPLICATION DIAGRAM EXAMPLE IN+ REF VDD VIO SDI SCK SDO GND CNV 1.
8 TO 5V 3- OR 4-WIRE INTERFACE (SPI, , CS DAISY CHAIN) ±10V, ±5V, .
.
ADA4941 AD7982 IN– Figure 1.
GENERAL DESCRIPTION The AD7982 is a 18-bit, successive approximation, analog-todigital 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.
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 100 kSPS Type 18Bit 16Bit AD76...


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