AD7677_15 Datasheet, PDF (1/20 Pages) Analog Devices – 16-Bit, 1 LSB INL, 1 MSPS

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16-Bit, 1 LSB INL, 1 MSPS
Differential ADC
AD7677
FEATURES
Throughput: 1 MSPS
INL: ؎1 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
Single 5 V Supply Operation
115 mW Typical Power Dissipation, 15 ␮W @ 100 SPS
Power-Down Mode: 7 ␮W Max
Packages: 48-Lead Quad Flatpack (LQFP)
48-Lead Frame Chip Scale (LFCSP)
Pin-to-Pin Compatible Upgrade of the AD7664/AD7675/
AD7676
APPLICATIONS
CT Scanners
Data Acquisition
Instrumentation
Spectrum Analysis
Medical Instruments
Battery-Powered Systems
Process Control
FUNCTIONAL BLOCK DIAGRAM
AVDD AGND REF REFGND
AD7677
IN+
SWITCHED
IN–
CAP DAC
PD
RESET
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
WARP IMPULSE CNVST
DVDD DGND
SERIAL
PORT
16
PARALLEL
INTERFACE
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 AD7677 is a 16-bit, 1 MSPS, 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 AD7677 is hardware factory calibrated and comprehen-
sively 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 features a very high sampling rate mode (Warp); a fast
mode (Normal) for asynchronous conversion rate applica-
tions; and, for low power applications, a reduced power mode
(Impulse) where the power is scaled with the throughput.
The AD7677 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 AD7677 has a maximum integral nonlinearity of 1 LSB
with a no missing 16-bit code.
2. Superior AC Performances
The AD7677 has a minimum dynamic of 92 dB, 94 dB typical.
3. Fast Throughput
The AD7677 is a 1 MSPS, charge redistribution, 16-bit SAR
ADC with internal error correction circuitry.
4. Single-Supply Operation
The AD7677 operates from a single 5 V supply and typically
dissipates only 115 mW. Its power dissipation decreases
with the 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 inter-
face arrangement compatible with both 3 V or 5 V logic.
REV. A
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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