Datasheet AD7949-EP (Analog Devices) - 3

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Enhanced Product AD7949-EP SPECIFICATIONS
VDD = 2.3 V to 5.5 V, VIO = 1.8 V to VDD, VREF = VDD, all specifications −55°C to +125°C, unless otherwise noted.
Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
RESOLUTION 14 Bits ANALOG INPUT Voltage Range Unipolar mode 0 +VREF V Bipolar mode −VREF/2 +VREF/2 Absolute Input Voltage Positive input, unipolar and bipolar modes −0.1 VREF + 0.1 V Negative or COM input, unipolar mode −0.1 +0.1 Negative or COM input, bipolar mode VREF/2 − 0.1 VREF/2 VREF/2 + 0.1 Analog Input CMRR fIN = 250 kHz 68 dB Leakage Current at 25°C Acquisition phase 1 nA Input Impedance1 THROUGHPUT Conversion Rate Full Bandwidth2 VDD = 4.5 V to 5.5 V 0 250 kSPS VDD = 2.3 V to 4.5 V 0 200 kSPS ¼ Bandwidth2 VDD = 4.5 V to 5.5 V 0 62.5 kSPS VDD = 2.3 V to 4.5 V 0 50 kSPS Transient Response Full-scale step, full bandwidth 1.8 μs Full-scale step, ¼ bandwidth 14.5 μs ACCURACY No Missing Codes 14 Bits Integral Linearity Error −1 ±0.5 +1 LSB3 Differential Linearity Error −1 ±0.25 +1 LSB Transition Noise REF = VDD = 5 V 0.1 LSB Gain Error4 −5 ±0.5 +5 LSB Gain Error Match −1 ±0.2 +1 LSB Gain Error Temperature Drift ±1 ppm/°C Offset Error4 ±0.5 LSB Offset Error Match −1 ±0.2 +1 LSB Offset Error Temperature Drift ±1 ppm/°C Power Supply Sensitivity VDD = 5 V ± 5% ±0.2 LSB AC ACCURACY5 Dynamic Range 85.6 dB6 Signal-to-Noise fIN = 20 kHz, VREF = 5 V 84.5 85.5 dB fIN = 20 kHz, VREF = 4.096 V internal REF 85 dB fIN = 20 kHz, VREF = 2.5 V internal REF 84 dB SINAD fIN = 20 kHz, VREF = 5 V 84 85 dB fIN = 20 kHz, VREF = 5 V, −60 dB input 33.5 dB fIN = 20 kHz, VREF = 4.096 V internal REF 85 dB fIN = 20 kHz, VREF = 2.5 V internal REF 84 dB Total Harmonic Distortion fIN = 20 kHz −100 dB Spurious-Free Dynamic Range fIN = 20 kHz 108 dB Channel-to-Channel Crosstalk fIN = 100 kHz on adjacent channel(s) −125 dB SAMPLING DYNAMICS −3 dB Input Bandwidth Full bandwidth 1.7 MHz ¼ bandwidth 0.425 MHz Aperture Delay VDD = 5 V 2.5 ns Rev. B | Page 3 of 12 Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Outline Dimensions Ordering Guide