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AD7667 Folha de dados(PDF) 1 Page - Analog Devices

Nome de Peças AD7667
Descrição Electrónicos  Unipolar ADC with Reference
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AD7667 Folha de dados(HTML) 1 Page - Analog Devices

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16-Bit 1 MSPS PulSAR®
Unipolar ADC with Reference
AD7667
Rev. 0
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.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
FEATURES
2.5 V internal reference: typical drift 3 ppm/°C
Guaranteed max drift 15 ppm/°C
Throughput:
1 MSPS (Warp mode)
800 kSPS (Normal mode)
666 kSPS (Impulse mode)
INL: ±2.0 LSB max (±0.0038% of full scale)
16-bit resolution with no missing codes
S/(N+D): 88 dB min @ 20 kHz
THD: –96 dB max @ 20 kHz
Analog input voltage range: 0 V to 2.5 V
No pipeline delay
Parallel and serial 5 V/3 V interface
SPI
®/QSPITM/MICROWIRETM/DSP compatible
Single 5 V supply operation
Power dissipation
87 mW typ @ 666 kSPS, 130 µW @ 1 kSPS without REF
133 mW typ @1 MSPS with REF
48-lead LQFP and 48-lead LFCSP packages
Pin-to-pin compatible with AD7671, AD7677
APPLICATIONS
Data acquisition
Medical instruments
Digital signal processing
Battery-powered systems
Process control
GENERAL DESCRIPTION
The AD7667 is a 16-bit, 1 MSPS, charge redistribution SAR
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, internal reference, error
correction circuits, and both serial and parallel system inter-
face ports. It features a very high sampling rate mode (Warp), a
fast mode (Normal) for asynchronous applications, and a
reduced power mode (Impulse) for low power applications
where power is scaled with the throughput. The AD7667 is
hardware factory-calibrated and comprehensively tested to
ensure ac parameters such as signal-to-noise ratio (SNR) and
total harmonic distortion (THD) in addition to the more
traditional dc parameters of gain, offset, and linearity. Operation
is specified from –40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
SWITCHED
CAP DAC
16
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
CLOCK
AD7667
DATA[15:0]
BUSY
RD
CS
SER/PAR
OB/2C
OGND
OVDD
DGND
DVDD
AVDD
AGND
REF REFGND
IN
INGND
PD
RESET
SERIAL
PORT
PARALLEL
INTERFACE
CNVST
WARP
IMPULSE
REF
REFBUFIN
PDBUF
PDREF
BYTESWAP
Figure 1.
Table 1. PulSAR Selection
Type/kSPS
100–250
500–570
800–
1000
Pseudo-
Differential
AD7651
AD7660/AD7661
AD7650/AD7652
AD7664/AD7666
AD7653
AD7667
True Bipolar
AD7663
AD7665
AD7671
True
Differential
AD7675
AD7676
AD7677
18-Bit
AD7678
AD7679
AD7674
Multichannel/
Simultaneous
AD7654
AD7655
PRODUCT HIGHLIGHTS
1.
Fast Throughput.
The AD7667 is a 1 MSPS, charge redistribution, 16-bit SAR
ADC with internal error correction circuitry.
2.
Superior INL.
The AD7667 has a maximum integral nonlinearity of
2.0 LSBs with no missing 16-bit codes.
3.
Internal Reference.
The AD7667 has an internal reference with a typical
temperature drift of 3 ppm/°C.
4.
Single-Supply Operation.
The AD7667 operates from a single 5 V supply. In Impulse
mode, its power dissipation decreases with throughput.
5.
Serial or Parallel Interface.
Versatile parallel or 2-wire serial interface arrangement is
compatible with both 3 V and 5 V logic.


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