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AD7845AR Datasheet(PDF) 2 Page - Analog Devices |
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AD7845AR Datasheet(HTML) 2 Page - Analog Devices |
2 / 12 page (VDD = +15 V, 5%, VSS = –15 V, 5%, VREF = +10 V, AGND = DGND = O V, VOUT connected to RFB. VOUT load = 2 k , 100 pF. All specifications TMIN to TMAX unless otherwise noted.) REV. B –2– AD7845–SPECIFICATIONS1 Parameter J Version K Version A Version B Version S Version T Version Units Test Conditions/Comments ACCURACY Resolution 12 12 12 12 12 12 Bits 1 LSB = V REF 212 = 2.4 mV Relative Accuracy at +25 °C ±1 ±1/2 ±1 ±1/2 ±1 ±1/2 LSB max All Grades Are Guaranteed TMIN to TMAX ±1 ±3/4 ±1 ±3/4 ±1 ±3/4 LSB max Monotonic over Temperature Differential Nonlinearity ±1 ±1 ±1 ±1 ±1 ±1 LSB max DAC Register Loaded with Zero Code Offset Error All 0s. at +25 °C ±2 ±1 ±2 ±1 ±2 ±1mV max TMIN to TMAX ±3 ±2 ±3 ±2 ±4 ±3mV max Offset Temperature Coefficient; ( ∆Offset/∆Temperature)2 ±5 ±5 ±5 ±5 ±5 ±5 µV/°C typ Gain Error ±3 ±2 ±3 ±2 ±3 ±2 LSB max RFB, VOUT Connected ±6 ±6 ±6 ±6 ±6 ±6 LSB max RC, VOUT Connected, VREF = +5 V ±6 ±6 ±6 ±6 ±6 ±6 LSB max RB, VOUT Connected, VREF = +5 V ±7 ±7 ±7 ±7 ±7 ±7 LSB max RA, VOUT Connected, VREF = +2.5 V Gain Temperature Coefficient; ( ∆Gain/∆Temperature)2 ±2 ±2 ±2 ±2 ±2 ±2 ppm of FSR/ °CR FB, VOUT Connected typ REFERENCE INPUT Input Resistance, Pin 17 8888 88 k Ω min Typical Input Resistance = 12 k Ω 16 16 16 16 16 16 k Ω max APPLICATION RESISTOR RATIO MATCHING 0.5 0.5 0.5 0.5 0.5 0 5 % max Matching Between RA, RB, RC DIGITAL INPUTS VIH (Input High Voltage) 2.4 2.4 2.4 2.4 2.4 2.4 V min VIL (Input Low Voltage) 0.8 0.8 0.8 0.8 0.8 0.8 V max IIN (Input Current) ±1 ±1 ±1 ±1 ±1 ±1 µA max Digital Inputs at 0 V and VDD CIN (Input Capacitance) 2 7777 77 pF max POWER SUPPLY 4 VDD Range 14.25/15.75 14.25/15.75 14.25/15.75 14.25/15.75 14.25/15.75 14.25/15.75 V min/V max VSS Range –14.25/–15.75 –14.25/–15.75 –14.25/–15.75 –14.25/–15.75 –14.25/–15.75 –14.25/–15.75 V min/V max Power Supply Rejection ∆Gain/∆V DD ±0.01 ±0.01 ±0.01 ±0.01 ±0.01 ±0.01 % per % max VDD = +15 V ± 5%, V REF = –10 V ∆Gain/∆V SS ±0.01 ±0.01 ±0.01 ±0.01 ±0.01 ±0.01 % per % max VSS = –15 V ± 5%. IDD 6666 66 mA max VOUT Unloaded ISS 4444 44 mA max VOUT Unloaded AC PERFORMANCE CHARACTERISTICS These characteristics are included for Design Guidance and are not subject to test. DYNAMIC PERFORMANCE Output Voltage Settling Time 5555 55 µs max To 0.01% of Full-Scale Range V OUT Load = 2 kΩ, 100 pF. DAC Register Alternately Loaded with All 0s and All 1s. Typically 2.5 µs at 25°C. Slew Rate 11 11 11 11 11 11 V/ µs typ V OUT Load = 2 kΩ, 100 pF. Digital-to-Analog 55 55 55 55 55 55 nV–s typ Measured with V REF = 0 V. Glitch Impulse DAC Register Alternately Loaded with All 0s and All 1s. Multiplying Feedthrough 5555 55 mV p-p typ V REF = ± 10 V, 10 kHz Sine Wave Error3 DAC Register Loaded with All 0s. Unity Gain Small Signal Bandwidth 600 600 600 600 600 600 kHz typ V OUT, RFB Connected. DAC Loaded with All 1s V REF = 100 mV p-p Sine Wave. Full Power Bandwidth 175 175 175 175 175 175 kHz typ V OUT, RFB Connected. DAC Loaded with All 1s. V REF = 20 V p-p Sine Wave. R L = 2 kΩ. Total Harmonic Distortion –90 –90 –90 –90 –90 –90 dB typ V REF = 6 V rms, 1 kHz Sine Wave. OUTPUT CHARACTERISTICS5 Open Loop Gain 85 85 85 85 85 85 dB min VOUT, RFB Not Connected VOUT = ±10 V, R L = 2 k Ω Output Voltage Swing ±10 ±10 ±10 ±10 ±10 ±10 V min RL = 2 k Ω, C L = 100 pF Output Resistance 0.2 0.2 0.2 0.2 0.2 0.2 Ω typ RFB, VOUT Connected, Short Circuit Current @ +25 °C 11 11 11 11 11 11 mA typ VOUT Shorted to AGND Output Noise Voltage Includes Noise Due to Output (0.1 Hz to 10 Hz) @ +25 °C 2222 22 µV rms typ Amplifier and Johnson Noise f = 10 Hz 250 250 250 250 250 250 nV/ √Hz typ of RFB f = 100 Hz 100 100 100 100 100 100 nV/ √Hz typ f = 1 kHz 50 50 50 50 50 50 nV/ √Hz typ f = 10 kHz 50 50 50 50 50 50 nV/ √Hz typ f = 100 kHz 50 50 50 50 50 50 nV/ √Hz typ NOTES 1Temperature ranges are as follows: J, K Versions: 0 °C to +70°C; A, B Versions: –40°C to +85°C; S, T Versions: –55°C to +125°C. 2Guaranteed by design and characterization, not production tested. 3The metal lid on the ceramic D-24A package is connected to Pin 12 (DGND). 4The device is functional with a power supply of ± 12 V. 5Minimum specified load resistance is 2 k Ω. Specifications subject to change without notice. |
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