AD7667

PRELIMINARY TECHNICAL DATA
a
16-Bit 1 MSPS SAR Unipolar ADC with Ref Preliminary Technical Data AD7667*
FEATURES Throughput: 1 MSPS (Warp Mode) 800 kSPS (Normal Mode) INL: ±2.5 LSB Max (±0.0038% of Full Scale) 16 Bits Resolution with No Missing Codes Analog Input Voltage Range: 0 V to 2.5 V No Pipeline Delay Parallel and Serial 5 V/3 V Interface SPITM/QSPITM/MICROWIRETM/DSP Compatible Single 5 V Supply Operation Power Dissipation 112 mW Typ without REF, 122 mW Typ with REF 15 ␮W @ 100 SPS Power-Down Mode: 7 ␮W Max Package: 48-Lead Quad Flat Pack (LQFP); 48-Lead Chip Scale Package (LFCSP); Pin-to-Pin Compatible with PulSAR ADCs APPLICATIONS Data Acquisition Instrumentation Digital Signal Processing Spectrum Analysis Medical Instruments Battery-Powered Systems Process Control
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© Analog Devices, Inc., 2002
PRELIMINARY TECHNICAL DATA
AD7667 –SPECIFICATIONS (–40؇C to +85؇C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.)
Parameter RESOLUTION ANALOG INPUT Voltage Range Operating Input Voltage Analog Input CMRR Input Current Input Impedance THROUGHPUT SPEED Complete Cycle Throughput Rate Time Between Conversions Complete Cycle Throughput Rate Complete Cycle Throughput Rate DC ACCURACY Integral Linearity Error No Missing Codes Transition Noise Full-Scale Error2 Unipolar Zero Error2 Power Supply Sensitivity AC ACCURACY Signal-to-Noise Spurious Free Dynamic Range Total Harmonic Distortion Signal-to-(Noise+Distortion) –3 dB Input Bandwidth SAMPLING DYNAMICS Aperture Delay Aperture Jitter Transient Response REFERENCE Internal Reference Voltage Internal Reference Source Current Internal Reference Temp Drift Internal Reference Temp Drift Turn-on Settling Time External Reference Voltage Range External Reference Current Drain Temperature Pin Voltage Output @ 25؇C Conditions Min 16 VIN – VINGND VIN VINGND fIN = 10 kHz 1 MSPS Throughput 0 –0.1 –0.1 TBD 11 See Analog Input Section 1 1000 1 1.25 800 1.5 666 +2.5 0.7 REF = 2.5 V AVDD = 5 V ± 5% fIN = 100 kHz fIN = 100 kHz fIN = 45 kHz fIN = 100 kHz fIN = 100 kHz –60 dB Input, fIN = 100 kHz ±TBD ±TBD 90 100 -100 -100 90 30 TBD 2 5 Full-Scale Step @ 25؇C TBD 2.5 TBD 250 TBD ±TBD ±TBD VREF +3 +0.5 Typ Max Unit Bits V V V dB µA
CLOCK
PDREF
RD CS SER/PAR OB/2C
PDBUF
PD RESET
CONTROL LOGIC AND CALIBRATION CIRCUITRY
BYTESWAP
WARP IMPULSE CNVST
PulSAR Selection
Type / kSPS Pseudo Differential
–40؇C to +85؇C 0؇C to +70؇C
2.3 1 MSPS Throughput
TBD TBD
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 interface ports. It features a very high sampling rate mode (Warp) and, for asynchronous conversion rate applications, a fast mode (Normal) and, for low power applications, a reduced power mode (Impulse) where the power is scaled with the throughput. 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.
REV. PrA
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.
*Patent pending. SPI and QSPI are trademarks of Motorola Inc. MICROWIRE ia a trademark of National Semiconductor Corporation
1. Fast Throughput The AD7667 is a 1 MSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. 2. Internal Reference The AD7667 has an internal reference and allows for an external reference to be used. 3. Superior INL The AD7667 has a maximum integral nonlinearity of 2.5 LSB with no missing 16-bit code. 4. Single-Supply Operation The AD7667 operates from a single 5 V supply and dissipates a typical of 112 mW. In impulse mode, its power dissipation decreases with the throughput. It consumes 7 µW maximum when in power-down. 5. Serial or Parallel Interface Versatile parallel or 2-wire serial interface arrangement compatible with both 3 V or 5 V logic.