16-Bit, 100 kSPS PulSAR,
Differential ADC in MSOP
AD7684
FEATURES
APPLICATIONS
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process control
APPLICATION DIAGRAM
0.5V TO VDD 2.7V TO 5.5V
VREF
0
REF
VDD
+IN
–IN
VREF
DCLOCK
AD7684
DOUT
3-WIRE SPI
INTERFACE
CS
GND
04302-001
16-bit resolution with no missing codes
Throughput: 100 kSPS
INL: ±1 LSB typical, ±3 LSB maximum
True differential analog input range: ±VREF
0 V to VREF with VREF up to VDD on both inputs
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 MSOP package
0
Figure 1.
Table 1. MSOP, QFN (LFCSP)/SOT-23
14-/16-/18-Bit PulSAR ADC
400 kSPS
to
500 kSPS
AD7690
100
kSPS
250
kSPS
AD7691
AD7684
AD7687
AD7688
AD7693
16-Bit Pseudo
AD7680
AD7685
AD7686
Differential
AD7683
AD7694
14-Bit Pseudo
Differential
AD7940
AD7942
Type
18-Bit True
Differential
16-Bit True
Differential
AD7946
≥ 1000
kSPS
AD7982
AD7984
ADC
Driver
ADA4941
ADA4841
ADA4941
ADA4841
AD7980
ADA4841
ADA4841
GENERAL DESCRIPTION
The AD7684 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, 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 the voltage difference
between +IN and –IN pins. The reference voltage, REF, is
applied externally and can be set up to the supply voltage. Its
power scales linearly with throughput.
The AD7684 is housed in an 8-lead MSOP, with an operating
temperature specified from −40°C to +85°C.
Rev. A
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
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