AD7980 Datasheet, PDF (1/22 Pages) Analog Devices – 16-bit, 1 MSPS PulSAR ADC in MSOP/QFN

16-bit, 1 MSPS PulSAR^® ADC in MSOP/QFN
Preliminary Technical Data
16-bit resolution with no missing codes
Throughput: 1MSPS
Low Power dissipation: 7.5 mW @ 1MSPS, 75 μW @ 10kSPS
INL: ±1 LSB typ, ±2 LSB max
S/(N + D): 91.5 dB @ 20 kHz
THD: −101 dB @ 20 kHz
Pseudo-differential analog input range
0 V to VREF with VREF between 2.5V to 5.5V
Any input range and easy to drive with the ADA4841
No pipeline delay
Single-supply 2.5V operation with 1.8 V/2.5 V/3 V/5 V logic
interface
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
Daisy-chain multiple ADCs and BUSY indicator
10-lead package: MSOP (MSOP-8 size) and
QFN (LFCSP), 3 mm × 3 mm same space as SOT-23
APPLICATIONS
Battery-powered equipment
Communications
ATE
Data acquisitions
Medical instruments
Table 1. MSOP, QFN(LFCSP)/SOT-23 14, 16 and18-Bit ADC
Type
100
kSPS
250
kSPS
400-
500
kSPS
1 MSPS
ADC
Driver
18Bit
AD7691¹ AD7690¹
ADA4941
ADA4841
16Bit AD7680 AD7685¹ AD7686¹ AD7980¹ ADA4941
AD7683 AD7687¹ AD7688¹
ADA4841
AD7684 AD7694 AD7693¹
14Bit AD7940 AD7942¹ AD7946¹
1 _{Pin-for-pin compatible.}
AD7980
APPLICATION DIAGRAM EXAMPLE
0.5V TO 5V 5V
0 TO VREF
REF VDD ^VIO
IN+
SDI
AD7980 ^SCK
IN–
SDO
GND
CNV
1.8V TO VDD
3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)
Figure 1.
GENERAL DESCRIPTION
The AD7980 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 up to 5.5V.
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 QFN
(LFCSP) with operation specified from −40°C to +85°C.
Rev Pr C
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