ANALOG DEVICES AD7980 Technical data

V

F

16-Bit, 1 MSPS PulSAR ADC in MSOP/QFN

FEATURES

16-bit resolution with no missing codes
Throughput: 1 MSPS
Low power dissipation: 7.0 mW @ 1 MSPS, 70 μW @ 10 kSPS
INL: ±0.6 LSB typical, ±1.25 LSB maximum
SINAD: 91.25 dB @ 10 kHz
THD: −110 dB @ 10 kHz
Pseudo differential analog input range

0 V to 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
Serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
Daisy-chain multiple ADCs and busy indicator
10-lead MSOP and 10-lead, 3 mm × 3 mm, QFN (LFCSP),

same space as SOT-23
Wide operating temperature range: −40°C to +125°C

APPLICATIONS

Battery-powered equipment
Communications
AT E
Data acquisitions
Medical instruments

with V

REF

between 2.5 V to 5.5 V

REF

AD7980

APPLICATION DIAGRAM EXAMPLE

2.5V TO 5V2.5

0 TO VRE

IN+

IN–

REF

AD7980

GND

VDD

Figure 1.

VIO

SDI

SCK

SDO

CNV

GENERAL DESCRIPTION

The AD7980 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.

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 +125°C.

1.8V TO 5V

3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)

06392-001

Table 1. MSOP, QFN (LFCSP) 14-/16-/18-Bit PulSAR® ADC

Type 100 kSPS 250 kSPS 400 kSPS to 500 kSPS 1000 kSPS ADC Driver

18-Bit AD76911 AD76901 AD79821 ADA4941
ADA4841
16-Bit AD7680 AD7685

1

AD7686

1

AD79801 ADA4941

AD7683 AD76871 AD76881 ADA4841
AD7684 AD7694 AD76931
14-Bit AD7940 AD79421 AD79461

1

Pin-for-pin compatible.

Rev. B

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