EVAL-AD7982SDZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-AD7982SDZ' PDF : 26 Pages View PDF
Data Sheet
18-Bit, 1 MSPS PulSAR ADC in MSOP/LFCSP
AD7982
FEATURES
FUNCTIONAL BLOCK DIAGRAM
High performance
2.5V TO 5V 2.5V
True differential analog input range: ±VREF
0 V to VREF with VREF between 2.5 V to 5 V
Easy to drive with the ADA4941-1 or ADA4940-1
Throughput: 1 MSPS
Zero latency architecture
18-bit resolution with no missing codes
INL: ±1 LSB typical, ±2 LSB maximum
±10V, ±5V, ..
ADA4940-1/
ADA4941-1
REF VDD VIO
IN+
SDI
AD7982 SCK
IN–
GND
SDO
CNV
1.8V TO 5V
3- OR 4-WIRE
INTERFACE
(SPI, CS
DAISY CHAIN)
Dynamic range: 99 dB, VREF = 5 V
SNR: 98 dB at fIN = 1 kHz, VREF = 5 V
THD: −119 dB at fIN = 1 kHz, VREF = 5 V
Figure 1.
GENERAL DESCRIPTION
SINAD: 97 dB at fIN = 1 kHz, VREF = 5 V
The AD7982 is an 18-bit, successive approximation, analog-to-
Low power dissipation
digital converter (ADC) that operates from a single power supply,
Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and
VDD. The AD7982 contains a low power, high speed, 18-bit
5 V logic interface
sampling ADC and a versatile serial interface port. On the CNV
4 mW at 1 MSPS (VDD only)
rising edge, the AD7982 samples the voltage difference between
7 mW at 1 MSPS (total)
the IN+ and IN− pins. The voltages on these pins usually swing
70 μW at 10 kSPS
Proprietary serial interface
SPI-/QSPI™/ MICROWIRE™-/DSP-compatible1
in opposite phases between 0 V and VREF. The reference voltage,
VREF, is applied externally and can be set independent of the
supply voltage, VDD. Its power scales linearly with throughput.
Ability to daisy-chain multiple ADCs and busy indicator
10-lead MSOP and 3 mm × 3 mm 10-lead LFCSP
Wide operating temperature range: −40°C to +85°C
The serial peripheral interface (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
APPLICATIONS
busy indicator. The AD7982 is compatible with 1.8 V, 2.5 V, 3 V,
Automated test equipment
and 5 V logic, using the separate VIO supply.
Data acquisition systems
Medical instruments
Machine automation
The AD7982 is available in a 10-lead MSOP or a 10-lead LFCSP
with operation specified from −40°C to +85°C.
1 Protected by U.S. Patent 6,703,961.
Table 1. MSOP, LFCSP 16-/18-/20-Bit Precision SAR ADCs and SAR ADC-Based μModule Data Acquisition Solutions
Type
≤100 kSPS ≤250 kSPS ≤500 kSPS ≤1000 kSPS ≤2000 kSPS μModule Data Acquisition Solutions
Differential
20-Bit
18-Bit
16-Bit
AD7989-11 AD76911
AD7684
AD76871
AD40221
AD40111
AD76901
AD7989-51
AD76881
AD76931
AD79161
AD40211
AD40071
AD79821
AD79841
AD40051
AD79151
AD40201
AD40031
AD40011
Pseudo Differential
18-Bit
16-Bit
AD7988-11
AD7680
AD7683
AD76851
AD7694
AD40101
AD40081
AD7988-51
AD76861
AD40061
AD40041
AD79801
AD79831
AD40021
AD40001
ADAQ7980
ADAQ7988
1 Pin for pin compatible.
Rev. E
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