AD7675_15 Datasheet, PDF (1/20 Pages) Analog Devices – 16-Bit, 100 kSPS

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FEATURES
Throughput: 100 kSPS
INL: ؎1.5 LSB Max (؎0.0015% of Full Scale)
16 Bits Resolution with No Missing Codes
S/(N+D): 94 dB Typ @ 45 kHz
THD: –110 dB Typ @ 45 kHz
Differential Input Range: ؎2.5 V
Both AC and DC Specifications
No Pipeline Delay
Parallel (8 Bits/16 Bits) and Serial 5 V/3 V Interface
SPI™/QSPI™/MICROWIRE™/DSP Compatible
Single 5 V Supply Operation
15 mW Typical Power Dissipation, 15 ␮W @ 100 SPS
Power-Down Mode: 7 ␮W Max
Packages: 48-Lead Quad Flatpack (LQFP),
46-Lead Frame Chip Scale (LFCSP)
Pin-to-Pin Compatible with the AD7660
Replacement of AD676, AD677
APPLICATIONS
CT Scanners
Data Acquisition
Instrumentation
Spectrum Analysis
Medical Instruments
Battery-Powered Systems
Process Control
16-Bit, 100 kSPS,
Differential ADC
AD7675
FUNCTIONAL BLOCK DIAGRAM
AVDD AGND REF REFGND
DVDD DGND
IN+
IN–
PD
RESET
AD7675
SWITCHED
CAP DAC
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
SERIAL
PORT
16
PARALLEL
INTERFACE
CNVST
OVDD
OGND
SER/PAR
BUSY
DATA[15:0]
CS
RD
OB/2C
BYTESWAP
Type/kSPS
Pseudo
Differential
True Bipolar
True Differential
PulSAR Selection
100–250
AD7660
AD7663
AD7675
500–570
AD7650
AD7664
AD7665
AD7676
1000
AD7671
AD7677
GENERAL DESCRIPTION
The AD7675 is a 16-bit, 100 kSPS, charge redistribution SAR,
fully differential analog-to-digital converter that operates from a
single 5 V power supply. The part contains a high speed 16-bit
sampling ADC, an internal conversion clock, error correction
circuits, and both serial and parallel system interface ports.
The AD7675 is hardware factory calibrated and is comprehensively
tested to ensure such ac parameters as signal-to-noise ratio (SNR)
and total harmonic distortion (THD), in addition to the more
traditional dc parameters of gain, offset, and linearity.
It is fabricated using Analog Devices’ high performance, 0.6
micron CMOS process and is available in a 48-lead LQFP or a
tiny 48-lead LFCSP with operation specified from –40°C to +85°C.
PRODUCT HIGHLIGHTS
1. Excellent INL
The AD7675 has a maximum integral nonlinearity of 1.5 LSB
with no missing 16-bit code.
2. Superior AC Performances
The AD7675 has a minimum dynamic of 92 dB, 94 dB typical.
3. Fast Throughput
The AD7675 is a 100 kSPS, charge redistribution, 16-bit
SAR ADC with internal error correction circuitry.
4. Single-Supply Operation
The AD7675 operates from a single 5 V supply and typically
dissipates only 17 mW. Its power dissipation decreases
with the throughput to, for instance, only 15 µW at a 100 SPS
throughput. It consumes 7 µW maximum when in power-down.
5. Serial or Parallel Interface
Versatile parallel (8 bits or 16 bits) or 2-wire serial interface
arrangement compatible with either 3 V or 5 V logic.
SPI and QSPI are trademarks of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Inc.
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no 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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002