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Analog Devices - 100 kSPS/500 kSPS PulSAR ADCs

Numéro de référence AD7989-5
Description 100 kSPS/500 kSPS PulSAR ADCs
Fabricant Analog Devices 
Logo Analog Devices 





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AD7989-5 fiche technique
Data Sheet
18-Bit, 100 kSPS/500 kSPS
PulSAR ADCs in MSOP/LFCSP
AD7989-1/AD7989-5
FEATURES
GENERAL DESCRIPTION
Low power dissipation
AD7989-1
400 μW at 100 kSPS (VDD only)
700 μW at 100 kSPS (total)
AD7989-5
2 mW at 500 kSPS (VDD only)
3.5 mW at 500 kSPS (total)
18-bit resolution with no missing codes
Throughput: 100 kSPS (AD7989-1)/500 kSPS (AD7989-5)
INL: ±1 LSB typical, 2 LSB maximum
SNR: 98 dB at 1 kHz, VREF = 5 V
SINAD: 97 dB at 1 kHz
THD: −120 dB at 10 kHz
Dynamic range: 99 dB, VREF = 5 V
True differential analog input range: ±VREF
0 V to VREF with VREF between 2.4 V and 5.1 V
No pipeline delay
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic
interface
Proprietary serial interface: SPI-/QSPI™-/MICROWIRE™-/DSP-
compatible1
Ability to daisy-chain multiple ADCs
10-lead package: MSOP and 3 mm × 3 mm LFCSP
APPLICATIONS
Battery-powered equipment
Data acquisition systems
Medical instruments
Seismic data acquisition systems
The AD7989-1/AD7989-5 are 18-bit, successive approximation,
analog-to-digital converters (ADCs) that operate from a single
power supply, VDD. They contain a low power, high speed,
18-bit sampling ADC and a versatile serial interface port. On
the CNV rising edge, the AD7989-1/AD7989-5 sample the
voltage difference between the IN+ and IN− pins. The voltages
on these pins usually swing in opposite phases between 0 V and
VREF. The reference voltage, REF, is applied externally and can
be set independent of the supply voltage, VDD. Its power scales
linearly with throughput.
The AD7989-1/AD7989-5 are serial peripheral interface (SPI)
compatible, which features the ability, using the SDI input, to
daisy-chain several ADCs on a single 3-wire bus. It is compatible
with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.
The AD7989-1/AD7989-5 are available in a 10-lead MSOP or a
10-lead LFCSP with operation specified from −40°C to +85°C.
Table 1. MSOP, LFCSP 14-/16-/18-Bit PulSAR® ADCs
Bits 100 kSPS 250 kSPS 400 kSPS to 500 kSPS ≥1000 kSPS
181 AD7989-12 AD76912 AD76902
AD79822
AD7989-52
AD79842
161 AD7684
AD76872 AD76882
163 AD7680
AD76852
AD76932
AD76862
AD79802
AD7683
AD7694 AD7988-52
AD79832
AD7988-12
143 AD7940
AD79422 AD79462
1 True differential.
2 Pin-for-pin compatible.
3 Pseudo differential.
TYPICAL APPLICATIONS CIRCUIT
2.5V TO 5V 2.5V
±10V, ±5V, ..
ADA4941-1
REF VDD VIO
IN+ SDI/CS
AD7989-1/ SCK
AD7989-5
IN–
SDO
GND CNV
Figure 1.
1.8V TO 5.5V
3- OR 4-WIRE
INTERFACE
(SPI, CS,
DAISY CHAIN)
1 Protected by U.S. Patent 6,703,961.
Rev. A
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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