AD7980_15 Datasheet, PDF (1/29 Pages) Analog Devices – 16-Bit, 1 MSPS PulSAR ADC in MSOP/LFCSP

Data Sheet
16-Bit, 1 MSPS PulSAR ADC in MSOP/LFCSP
AD7980
FEATURES
16-bit resolution with no missing codes
Throughput: 1 MSPS
Low power dissipation
4 mW at 1 MSPS (VDD only)
7 mW at 1 MSPS (total)
70 µW at 10 kSPS
INL: ±0.6 LSB typical, ±1.25 LSB maximum
SINAD: 91.25 dB at 10 kHz
THD: −110 dB at 10 kHz
Pseudo differential analog input range
0 V to VREF with VREF between 2.5 V to 5.5 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 compatible
Daisy-chain multiple ADCs and busy indicator
10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP,
same space as SOT-23
Wide operating temperature range: −40°C to +125°C
APPLICATIONS
Battery-powered equipment
Communications
ATE
Data acquisitions
Medical instruments
APPLICATION DIAGRAM EXAMPLE
2.5V TO 5V 2.5V
0 TO VREF
REF VDD ^VIO
IN+
SDI
AD7980 ^SCK
IN–
SDO
GND
CNV
1.8V TO 5.0V
3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)
Figure 1.
GENERAL DESCRIPTION
The AD7980¹ is a 16-bit, successive approximation, analog-to-
digital 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.
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 AD7980 is housed in a 10-lead MSOP or a 10-lead LFCSP
with operation specified from −40°C to +125°C.
1 _{Protected by U.S. Patent 6,703,961.}
Table 1. MSOP, LFCSP 14-/16-/18-Bit PulSAR® ADC
Type
100 kSPS
250 kSPS
18-Bit
AD7989-1¹
AD7691¹
16-Bit
14-Bit
AD7680
AD7683
AD7684
AD7988-1¹
AD7940
1 _{Pin-for-pin compatible.}
AD7685¹
AD7687¹
AD7694
AD7942¹
400 kSPS to 500 kSPS
AD7690¹
AD7989-5¹
AD7686¹
AD7688¹
AD7693¹
AD7988-5¹
AD7946¹
≥1000 kSPS
AD7982¹
AD7984¹
AD7980¹
AD7983¹
Rev. D
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