16-Bit, 100 kSPS, a Differential ADC AD7675 FEATURES FUNCTIONAL BLOCK DIAGRAM Throughput: 100 kSPS AVDD AGND REF REFGND DVDD DGND INL: 1.5 LSB Max ( 0.0015% of Full Scale) 16 Bits Resolution with No Missing Codes OVDD S/(N+D): 94 dB Typ 45 kHz AD7675 OGND THD: 110 dB Typ 45 kHz SERIAL PORT Differential Input Range: 2.5 V IN+ SWITCHED SER/PAR Both AC and DC Specifications CAP DAC IN BUSY No Pipeline Delay 16 Parallel (8 Bits/16 Bits) and Serial 5 V/3 V Interface DATA 15:0 PARALLEL CLOCK SPI/QSPI/MICROWIRE/DSP Compatible CS INTERFACE PD Single 5 V Supply Operation CONTROL LOGIC AND RD CALIBRATION CIRCUITRY RESET 15 mW Typical Power Dissipation, 15 W 100 SPS OB/2C Power-Down Mode: 7 W Max BYTESWAP Packages: 48-Lead Quad Flatpack (LQFP), CNVST 46-Lead Frame Chip Scale (LFCSP) Pin-to-Pin Compatible with the AD7660 Replacement of AD676, AD677 PulSAR Selection APPLICATIONS Type/kSPS 100250 500570 1000 CT Scanners Pseudo AD7660 AD7650 Data Acquisition Differential AD7664 Instrumentation Spectrum Analysis True Bipolar AD7663 AD7665 AD7671 Medical Instruments True Differential AD7675 AD7676 AD7677 Battery-Powered Systems Process Control GENERAL DESCRIPTION PRODUCT HIGHLIGHTS The AD7675 is a 16-bit, 100 kSPS, charge redistribution SAR, 1. Excellent INL fully differential analog-to-digital converter that operates from a The AD7675 has a maximum integral nonlinearity of 1.5 LSB single 5 V power supply. The part contains a high speed 16-bit with no missing 16-bit code. sampling ADC, an internal conversion clock, error correction 2. Superior AC Performances circuits, and both serial and parallel system interface ports. The AD7675 has a minimum dynamic of 92 dB, 94 dB typical. The AD7675 is hardware factory calibrated and is comprehensively 3. Fast Throughput tested to ensure such ac parameters as signal-to-noise ratio (SNR) The AD7675 is a 100 kSPS, charge redistribution, 16-bit and total harmonic distortion (THD), in addition to the more SAR ADC with internal error correction circuitry. traditional dc parameters of gain, offset, and linearity. 4. Single-Supply Operation It is fabricated using Analog Devices high performance, 0.6 The AD7675 operates from a single 5 V supply and typically micron CMOS process and is available in a 48-lead LQFP or a dissipates only 17 mW. Its power dissipation decreases tiny 48-lead LFCSP with operation specified from 40C to +85C. with the throughput to, for instance, only 15 W at a 100 SPS throughput. It consumes 7 W 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties that Tel: 781/329-4700 www.analog.com may result from its use. No license is granted by implication or otherwise Fax: 781/326-8703 Analog Devices, Inc., 2002 under any patent or patent rights of Analog Devices.AD7675SPECIFICATIONS (40 C to +85 C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.) Parameter Conditions Min Typ Max Unit RESOLUTION 16 Bits ANALOG INPUT Voltage Range V V V +V V IN+ IN REF REF Operating Input Voltage V V to AGND 0.1 +3 V IN+, IN Analog Input CMRR f = 10 kHz 79 dB IN Input Current 100 kSPS Throughput 1 A Input Impedance See Analog Input Section THROUGHPUT SPEED Complete Cycle 10 s Throughput Rate 0 100 kSPS DC ACCURACY 1 Integral Linearity Error 1.5 +1.5 LSB No Missing Codes 16 Bits Transition Noise 0.35 LSB 2 +Full-Scale Error 22 +22 LSB 2 Full-Scale Error 22 +22 LSB 2 Zero Error 8 +8 LSB Power Supply Sensitivity AVDD = 5 V 5% 0.5 LSB AC ACCURACY 3 Signal-to-Noise f = 20 kHz 92 94 dB IN 3 f = 45 kHz 94 dB IN 3 Spurious Free Dynamic Range f = 20 kHz 104.5 110 dB IN 3 f = 45 kHz 110 dB IN 3 Total Harmonic Distortion f = 20 kHz 110 103.5 dB IN 3 f = 45 kHz 110 dB IN 3 Signal-to-(Noise+Distortion) f = 20 kHz 92 94 dB IN 3 f = 45 kHz 94 dB IN 3 f = 45 kHz, 60 dB Input 34 dB IN 3 dB Input Bandwidth 3.9 MHz SAMPLING DYNAMICS Aperture Delay 2ns Aperture Jitter 5 ps rms Transient Response Full-Scale Step 8.75 s REFERENCE External Reference Voltage Range 2.3 2.5 AVDD 1.85 V External Reference Current Drain 100 kSPS Throughput 35 A DIGITAL INPUTS Logic Levels V 0.3 +0.8 V IL V 2.0 DVDD + 0.3 V IH I 1 +1 A IL I 1 +1 A IH DIGITAL OUTPUTS Data Format Parallel or Serial 16-Bit Conversion Results Available Pipeline Delay Immediately After Completed Conversion V I = 1.6 mA 0.4 V OL SINK V I = 100 A OVDD 0.6 V OH SOURCE POWER SUPPLIES Specified Performance AVDD 4.75 5 5.25 V DVDD 4.75 5 5.25 V 4 OVDD 2.7 5.25 V Operating Current 300 kSPS Throughput AVDD 3mA 5 DVDD 750 A 5 OVDD 7.5 A 5 Power Dissipation 100 kSPS Throughput 17 25 mW 100 SPS Throughput 15 W 5 In Power-Down Mode 7 W 7 TEMPERATURE RANGE Specified Performance T to T 40 +85 C MIN MAX NOTES 1 LSB means Least Significant Bit. With the 2.5 V input range, one LSB is 76.3 V. 2 See Definition of Specifications section. These specifications do not include the error contribution from the external reference. 3 All specifications in dB are referred to a full-scale input FS. Tested with an input signal at 0.5 dB below full-scale unless otherwise specified. 4 The max should be the minimum of 5.25 V and DVDD + 0.3 V. 5 Tested in Parallel Reading Mode. 6 With OVDD below DVDD + 0.3 V and all digital inputs forced to DVDD or DGND, respectively. 7 Contact factory for extended temperature range. Specifications subject to change without notice. 2 REV. A