AD7693 Datasheet, PDF (1/24 Pages) Analog Devices – 16-Bit, +/-0.65 LSB INL, 500 kSPS PulSAR Differential ADC in MSOP/QFN

16-Bit, +/-0.65 LSB INL, 500 kSPS PulSAR^®
Differential ADC in MSOP/QFN
Preliminary Technical Data
AD7693
FEATURES
16-bit resolution with no missing codes
Throughput: 500 kSPS
INL: +/-0.25 LSB typical, ±0.65 LSB max (±10 ppm of FSR)
Dynamic range: 96.5 dB typical @ 500 kSPS
SINAD: 96 dB typical @ 1 kHz, REF = 5V
THD: −120 dB typical @ 1 kHz. REF = 5V
True differential analog input range: ±VREF
0 V to VREF with VREF up to VDD on both inputs
No pipeline delay
Single-supply 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
Power dissipation
4 mW @ 5 V/100 kSPS
40 μW @ 5 V/1 kSPS
Standby current: 1 nA
10-lead package: MSOP (MSOP-8 size) and
3 mm × 3 mm QFN¹ (LFCSP) (SOT-23 size)
Pin-for-pin compatible with the AD7687, AD7688 and 18-bit
AD7690 and AD7691
APPLICATIONS
Battery-powered equipment
Data acquisitions
Seismic data acquisition systems
DVMs
Instrumentation
Medical instruments
Figure 1. Integral Nonlinearity vs. Code
Rev. PrB
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APPLICATION DIAGRAM
+2.5V TO +5V +5V
±10V, ±5V, ...
ADA4941-1
REF VDD ^VIO
IN+
SDI
SCK
IN–
GND
SDO
CNV
+1.8V TO VDD
3- OR 4-WIRE
INTERFACE
(SPI, DAISY CHAIN, CS)
AD7693
Figure 2.
Table 1. MSOP, QFN¹ (LFCSP)/SOT-23
14-/16-/18-Bit PulSAR ADC
Type
100
kSPS
250
kSPS
400 kSPS
to
500 kSPS
18-Bit
AD7691 AD7690
16-Bit True
Differential
16-Bit Pseudo
Differential/
Unipolar
14-Bit
AD7684
AD7683
AD7680
AD7940
AD7687
AD7685
AD7694
AD7942
AD7688
AD7693
AD7686
AD7946
ADC
Driver
ADA4941-1
ADA4841-x
ADA4941-1
ADA4841-x
ADA4841-x
ADA4841-x
1 _{QFN package in development. Contact sales for samples and availability.}
GENERAL DESCRIPTION
The AD7693 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
with no missing codes, an internal conversion clock, and a
versatile serial interface port. On the CNV rising edge, it
samples the voltage difference between the IN+ and IN− pins.
The voltages on these pins swing in opposite phase between 0 V
and REF. The reference voltage, REF, is applied externally and
can be set up to 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 VIO supply.
The AD7693 is housed in a 10-lead MSOP or a 10-lead QFN¹
(LFCSP) with operation specified from −40°C to +85°C.
1 _{QFN package in development. Contact sales for samples and availability.}
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