Datasheet AD7678 (Analog Devices) - 5

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AD7678 Parameter Conditions Min Typ Max Unit
DIGITAL INPUTS Logic Levels VIL –0.3 +0.8 V VIH 2.0 DVDD + 0.3 V IIL –1 +1 μA IIH –1 +1 μA DIGITAL OUTPUTS Data Format5 Pipeline Delay6 VOL ISINK = 1.6 mA 0.4 V VOH ISOURCE = –500 μA OVDD – 0.6 V POWER SUPPLIES Specified Performance AVDD 4.75 5 5.25 V DVDD 4.75 5 5.25 V OVDD 2.7 DVDD + 0.37 V Operating Current 100 kSPS Throughput AVDD PDBUF High 2.6 mA DVDD8 1 mA OVDD8 40 μA PDBUF High @ 100 kSPS 18 26 mW PDBUF High @ 1 kSPS 180 μW PDBUF Low @ 100 kSPS 31 mW TEMPERATURE RANGE9 Specified Performance TMIN to TMAX –40 +85 °C 1 See the Analog Inputs section. 2 LSB means Least Significant Bit. With the ±4.096 V input range, 1 LSB is 31.25 μV. 3 See the Definition of Specifications section. The nominal gain error is not centered at zero and is −0.029% of FSR. This specification is the deviation from this nominal value. These specifications do not include the error contribution from the external reference, but do include the error contribution from the reference buffer if used. 4 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. 5 Data format parallel or serial 18-bit. 6 Conversion results are available immediately after completed conversion. 7 The maximum should be the minimum of 5.25 V and DVDD + 0.3 V. 8 Tested in Parallel Reading mode. 9 Contact factory for extended temperature range. Rev. A | Page 4 of 28 Document Outline Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Definition of Specifications Integral Nonlinearity Error (INL) Differential Nonlinearity Error (DNL) Gain Error Zero Error Spurious-Free Dynamic Range (SFDR) Effective Number of Bits (ENOB) Total Harmonic Distortion (THD) Dynamic Range Signal-to-Noise Ratio (SNR) Signal-to-(Noise + Distortion) Ratio (S/[N+D]) Aperture Delay Transient Response Typical Performance Characteristics Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Inputs Driver Amplifier Choice Single-to-Differential Driver Voltage Reference Power Supply Power Dissipation versus Throughput Conversion Control Digital Interface Parallel Interface Serial Interface Master Serial Interface Internal Clock Slave Serial Interface External Clock External Discontinuous Clock Data Read after Conversion External Clock Data Read during Conversion Microprocessor Interfacing SPI Interface (ADSP-219x) Application Hints Layout Evaluating the AD7678’s Performance Outline Dimensions Ordering Guide