16-Bit, 1.33 MSPS PulSAR ADC in
MSOP/QFN
AD7983
Data Sheet
APPLICATION DIAGRAM
16-bit resolution with no missing codes
Throughput: 1.33 MSPS
Low power dissipation: 10.5 mW typical @ 1.33 MSPS
INL: ±0.6 LSB typical, ±1.0 LSB maximum
SINAD: 91.6 dB @ 10 kHz
THD: −115 dB @ 10 kHz
Pseudo differential analog input range
0 V to VREF with VREF between 2.9 V to 5.5 V
Any input range and easy to drive with the ADA4841
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™-/DSPcompatible1
Daisy-chain multiple ADCs and busy indicator
10-lead MSOP (MSOP-8 size) and 10-lead 3 mm × 3 mm QFN
(LFCSP), SOT-23 size
Wide operating temperature range: −40°C to +85°C
2.9V TO 5V
0 TO VREF
IN+
IN–
2.5V
REF VDD VIO
SDI
AD7983
SCK
SDO
GND
1.8V TO 5V
3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)
CNV
06974-001
FEATURES
Figure 1.
GENERAL DESCRIPTION
The AD7983 is a 16-bit, successive approximation, analog-todigital converter (ADC) that operates from a single power
supply, VDD. It contains a low power, high speed, 16-bit
sampling ADC and a versatile serial interface port. On the CNV
rising edge, it samples an analog input IN+ between 0 V to REF
with respect to a ground sense IN−. The reference voltage, REF,
is applied externally and can be set independent of the supply
voltage, VDD. Its power scales linearly with throughput.
APPLICATIONS
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.
Battery-powered equipment
Communications
ATE
Data acquisitions
Medical instruments
The AD7983 is housed in a 10-lead MSOP or a 10-lead QFN
(LFCSP) with operation specified from −40°C to +85°C.
1
Protected by U.S. Patent 6,703,961.
Table 1. MSOP, QFN (LFCSP) 14-/16-/18-Bit PulSAR® ADC
Type
14-Bit
16-Bit
18-Bit
1
100 kSPS
AD7940
AD7680
AD7683
AD7684
AD7988-1
AD7989-1
250 kSPS
AD79421
AD76851
AD76871
AD7694
AD76911
400 kSPS to 500 kSPS
AD79461
AD76861
AD76881
AD76931
AD7988-5
AD76901
AD7989-5
≥1000 kSPS
ADC Driver
AD79801
AD79831
ADA4941
ADA4841
AD79821
AD79841
ADA4941
ADA4841
Pin-for-pin compatible.
Rev. B
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