Datasheet AD7989-1, AD7989-5 (Analog Devices) - 3

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Data Sheet AD7989-1/AD7989-5 SPECIFICATIONS
VDD = 2.5 V, VIO = 1.71 V to 5.5 V, VREF = 5 V, TA = −40°C to +85°C, unless otherwise noted.
Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
RESOLUTION 18 Bits ANALOG INPUT Voltage Range IN+ − IN− −VREF +VREF V Absolute Input Voltage IN+ and IN− −0.1 VREF + 0.1 V Common-Mode Input Range IN+ and IN− VREF × 0.475 VREF × 0.5 VREF × 0.525 V Analog Input Common Mode Rejection fIN = 450 kHz 67 dB Ratio (CMRR) Leakage Current at 25°C Acquisition phase 200 nA Input Impedance See the Analog Inputs section ACCURACY No Missing Codes 18 Bits Differential Nonlinearity Error (DNL) −0.85 ±0.5 +1.5 LSB Integral Nonlinearity Error (INL) −2 ±1 +2 LSB Transition Noise VREF = 5 V 1.05 LSB1 Gain Error, T 2 MIN to TMAX −0.023 +0.004 +0.023 % of FS Gain Error Temperature Drift ±1 ppm/°C Zero Error, T 2 MIN to TMAX ±100 +700 μV Zero Temperature Drift 0.5 ppm/°C Power Supply Rejection Ratio (PSRR) VDD = 2.5 V ± 5% 90 dB THROUGHPUT AD7989-1 Conversion Rate 0 100 kSPS AD7989-5 Conversion Rate 0 500 kSPS Transient Response Full-scale step 400 ns AC ACCURACY Dynamic Range VREF = 5 V 97 99 dB3 VREF = 2.5 V 93 dB3 Oversampled Dynamic Range4 fO = 1 kSPS 126 dB3 Signal-to-Noise Ratio (SNR) fIN = 1 kHz, VREF = 5 V 95.5 98 dB3 fIN = 1 kHz, VREF = 2.5 V 92.5 dB3 Spurious-Free Dynamic Range (SFDR) fIN = 10 kHz −115 dB3 Total Harmonic Distortion5 (THD) fIN = 10 kHz −120 dB3 Signal-to-Noise-and-Distortion Ratio (SINAD) fIN = 1 kHz, VREF = 5 V 97 dB3 1 LSB means least significant bit. With the ±5 V input range, 1 LSB is 38.15 μV. 2 See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference. 3 All specifications expressed in decibels are referred to a full-scale input range (FSR) and tested with an input signal at 0.5 dB below full scale, unless otherwise specified. 4 Dynamic range is obtained by oversampling the ADC running at a throughput, fS, of 500 kSPS followed by postdigital filtering with an output word rate of fO. 5 Tested fully in production at fIN = 1 kHz. Rev. B | Page 3 of 24 Document Outline Features Applications General Description Typical Applications Circuit Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Inputs Driver Amplifier Choice Single-Ended to Differential Driver Voltage Reference Input Power Supply Digital Interface CSB Mode, 3-Wire CSB Mode, 4-Wire Chain Mode Applications Information Interfacing to Blackfin® DSP Layout Evaluating AD7989-1/AD7989-5 Performance Outline Dimensions Ordering Guide