Datasheet AD7980 (Analog Devices)

16-Bit, 1 MSPS PulSAR ADC in MSOP/LFCSP Data Sheet AD7980 FEATURES APPLICATION DIAGRAM EXAMPLE 16-bit resolution with no missing codes 2.5V TO 5V 2.5V Throughput: 1 MSPS Low power dissipation 4 mW at 1 MSPS (VDD only) REF VDD VIO 1.8V TO 5.0V 7 mW at 1 MSPS (total) 0 TO VREF SDI IN+ 70 µW at 10 kSPS AD7980 SCK 3- OR 4-WIRE INTERFACE IN– SDO (SPI, DAISY CHAIN, CS) INL: ±0.6 LSB typical, ±1.25 LSB maximum GND CNV
001
SINAD: 91.25 dB at 10 kHz THD: −110 dB at 10 kHz
06392- Figure 1.
Pseudo differential analog input range 0 V to VREF with VREF between 2.5 V to 5.5 V GENERAL DESCRIPTION No pipeline delay
The AD79801 is a 16-bit, successive approximation, analog-to-
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V
digital converter (ADC) that operates from a single power
logic interface
supply, VDD. It contains a low power, high speed, 16-bit
Proprietary serial interface
sampling ADC and a versatile serial interface port. On the CNV
SPI/QSPI/MICROWIRE™/DSP compatible
rising edge, it samples an analog input IN+ between 0 V to REF
Daisy-chain multiple ADCs and busy indicator
with respect to a ground sense IN−. The reference voltage, REF,
10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP,
is applied externally and can be set independent of the supply
same space as SOT-23
voltage, VDD. Its power scales linearly with throughput.
Wide operating temperature range: −40°C to +125°C
The SPI-compatible serial interface also features the ability,
APPLICATIONS
using the SDI input, to daisy-chain several ADCs on a single,
Battery-powered equipment
3-wire bus and provides an optional busy indicator. It is compatible
Communications
with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.
ATE
The AD7980 is housed in a 10-lead MSOP or a 10-lead LFCSP
Data acquisitions
with operation specified from −40°C to +125°C.
Medical instruments
1 Protected by U.S. Patent 6,703,961.
Table 1. MSOP, LFCSP 14-/16-/18-Bit PulSAR® ADC Type 100 kSPS 250 kSPS 400 kSPS to 500 kSPS ≥1000 kSPS
18-Bit AD7989-11 AD76911 AD76901 AD79821 AD7989-51 AD79841 16-Bit AD7680 AD76851 AD76861 AD79801 AD7683 AD76871 AD76881 AD79831 AD7684 AD7694 AD76931 AD7988-11 AD7988-51 14-Bit AD7940 AD79421 AD79461 1 Pin-for-pin compatible.
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Document Outline FEATURES APPLICATIONS APPLICATION DIAGRAM EXAMPLE GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUT DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE MODE, 3-CS WIRE, WITHOUT BUSY INDICATOR CS MODE 3-WIRE WITH BUSY INDICATOR CS MODE 4-WIRE, WITHOUT BUSY INDICATOR CS MODE 4-WIRE WITH BUSY INDICATOR CS CHAIN MODE, WITHOUT BUSY INDICATOR CS CHAIN MODE WITH BUSY INDICATOR APPLICATION HINTS LAYOUT EVALUATING THE PERFORMANCE OF THE AD7980 OUTLINE DIMENSIONS ORDERING GUIDE NOTES NOTES NOTES