AD7660_15 Datasheet, PDF (1/20 Pages) Analog Devices – 16-Bit, 100 kSPS PulSAR

a
16-Bit, 100 kSPS PulSAR^®
Unipolar CMOS ADC
AD7660^*
FEATURES
Throughput: 100 kSPS
INL: ؎3 LSB Max (؎0.0046% of Full-Scale)
16-Bit Resolution with No Missing Codes
S/(N+D): 87 dB Min @ 10 kHz, 90 dB Typ @ 45 kHz
THD: –96 dB Max @ 10 kHz
Analog Input Voltage Range: 0 V to 2.5 V
Both AC and DC Specifications
No Pipeline Delay
Parallel and Serial 5 V/3 V Interface
SPI^®/QSPI™/MICROWIRE™/DSP Compatible
Single 5 V Supply Operation
21 mW Typical Power Dissipation, 21 ␮W @ 100 SPS
Power-Down Mode: 7 ␮W Max
Package: 48-Lead Quad Flatpack (LQFP)
48-Lead Chip Scale Package (LFCSP)
Pin-to-Pin Compatible with the AD7664
APPLICATIONS
Data Acquisition
Battery-Powered Systems
PCMCIA
Instrumentation
Automatic Test Equipment
Scanners
Medical Instruments
Process Control
GENERAL DESCRIPTION
The AD7660 is a 16-bit, 100 kSPS, charge redistribution SAR,
analog-to-digital converter that operates from a single 5 V power
supply. The part contains an internal conversion clock, error cor-
rection circuits, and both serial and parallel system interface ports.
The AD7660 is hardware factory-calibrated and is comprehen-
sively 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.
It is fabricated using Analog Devices’ high performance,
0.6 micron CMOS process with correspondingly low cost and is
available in a 48-lead LQFP and a tiny 48-lead LFCSP with
operation specified from –40∞C to +85∞C.
FUNCTIONAL BLOCK DIAGRAM
AVDD AGND REF REFGND
DVDD DGND
IN
INGND
AD7660
SWITCHED
CAP DAC
SERIAL
PORT
16
PD
RESET
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
PARALLEL
INTERFACE
OVDD
OGND
D[15:0]
BUSY
RD
CS
SER/PAR
OB/2C
CNVST
Table I. PulSAR Selection
Type/kSPS 100–250
500–570
800–1000
Pseudo
Differential
True Bipolar
AD7651
AD7650/AD7652 AD7653
AD7660/AD7661 AD7664/AD7666 AD7667
AD7663
AD7665
AD7671
True
Differential
18-Bit
AD7675
AD7678
AD7676
AD7679
AD7677
AD7674
Simultaneous/
Multichannel
AD7654
AD7655
PRODUCT HIGHLIGHTS
1. Fast Throughput
The AD7660 is a 100 kSPS, charge redistribution, 16-bit
SAR ADC with internal error correction circuitry.
2. Superior INL
The AD7660 has a maximum integral nonlinearity of 3 LSBs
with no missing 16-bit code.
3. Single-Supply Operation
The AD7660 operates from a single 5 V supply and only
dissipates 21 mW typical. Its power dissipation decreases
with the throughput to, for instance, only 21 mW at a 100 SPS
throughput. It consumes 7 mW maximum when in power-down.
4. Serial or Parallel Interface
Versatile parallel or 2-wire serial interface arrangement com-
patible with both 3 V or 5 V logic.
*Patent pending
REV. D
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