
16-Bit, 100 kSPS PulSAR
ADC in MSOP/QFN
AD7683
FEATURES
16-bit resolution with no missing codes
Throughput: 100 kSPS
INL
:
±1 LSB typ, ±3 LSB max
Pseudodifferential analog input range
0 V to V
REF
with V
REF
up to VDD
Single-supply operation: 2.7 V to 5.5 V
Serial interface SPI/QSPI/MICROWIRE/DSP-compatible
Power dissipation : 4 mW @ 5 V, 1.5 mW @ 2.7 V,
150 μW @ 2.7 V/10 kSPS
Standby current: 1 nA
8-lead package: MSOP package and
1 (LFCSP) (SOT-23 size)
Improved 2
nd
source to ADS8320 and ADS8325
Rev. 0
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infringements of patents or other rights of third parties that may result from its use.
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APPLICATIONS
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process control
APPLICATION DIAGRAM
AD7683
REF
GND
VDD
+IN
–IN
DCLOCK
D
OUT
CS
3-WIRE SPI
0.5V TO VDD 2.7V TO 5.5V
0 TO V
REF
0
Figure 1.
Table 1. MSOP, QFN (LFCSP)/SOT-23, 16-Bit PulSAR ADC
Type
100 kSPS
True Differential
AD7684
Pseudo
Differential/Unipolar
Unipolar
AD7680
250 kSPS
AD7687
AD7685
AD7694
500 kSPS
AD7688
AD7686
AD7683
GENERAL DESCRIPTION
The AD7683 is a 16-bit, charge redistribution, successive
approximation, PulSAR analog-to-digital converter (ADC)
that operates from a single power supply, VDD, between 2.7 V
to 5.5 V. It contains a low power, high speed, 16-bit sampling
ADC with no missing codes (B grade), an internal conversion
clock, and a serial, SPI-compatible interface port. The part also
contains a low noise, wide bandwidth, short aperture delay,
track-and-hold circuit. On the CS falling 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 the supply voltage. Its power scales linearly with
throughput.
The AD7683 is housed in an 8-lead MSOP or an 8-lead QFN
(LFCSP) package, with an operating temperature specified from
40°C to +85°C.
1
QFN package in development. Contact factory for samples and availability.