Datasheet AD7741 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
| Pages / Page | 13 / 2 — AD7741–SPECIFICATIONS (VDD = +4.75 V to +5.25 V; VREF = +2.5 V; fCLKIN = … |
| Revision | A |
| File Format / Size | PDF / 238 Kb |
| Document Language | English |
AD7741–SPECIFICATIONS (VDD = +4.75 V to +5.25 V; VREF = +2.5 V; fCLKIN = 6.144 MHz; all specifications TMIN to
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Text Version of Document
AD7741–SPECIFICATIONS (VDD = +4.75 V to +5.25 V; VREF = +2.5 V; fCLKIN = 6.144 MHz; all specifications TMIN to TMAX unless otherwise noted.) B and Y Version1 Parameter2 Min Typ Max Units Conditions/Comments
DC PERFORMANCE Integral Nonlinearity fCLKIN = 200 kHz3 ±0.012 % of Span4 fCLKIN = 3 MHz3 ±0.012 % of Span fCLKIN = 6.144 MHz ±0.024 % of Span VDD > 4.8 V Offset Error ±40 mV Gain Error 0 +0.8 +1.6 % of Span Offset Error Drift3 ±30 μV/°C Gain Error Drift3 ±16 ppm of Span/°C Power Supply Rejection Ratio3 –63 dB ΔVDD = ±5% ANALOG INPUT5 Input Current ±50 ±100 nA Input Voltage Range 0 VREF V +2.5 V REFERENCE (REFIN/OUT) REFIN Nominal Input Voltage 2.5 V Input Impedance6 N/A REFOUT Output Voltage 2.38 2.50 2.60 V Output Impedance3 1 kΩ Reference Drift3 ±50 ppm/°C Line Rejection –60 dB Reference Noise (0.1 Hz to 10 Hz)3 100 μV p-p LOGIC OUTPUT Output High Voltage, VOH 4.0 V Output Sourcing 800 μA7 Output Low Voltage, VOL 0.4 V Output Sinking 1.6 mA7 Minimum Output Frequency 0.05 fCLKIN Hz VIN = 0 V Maximum Output Frequency 0.45 fCLKIN Hz VIN = VREF LOGIC INPUT PD ONLY Input High Voltage, VIH 2.4 V Input Low Voltage, VIL 0.8 V Input Current ±100 nA Pin Capacitance 6 10 pF CLKIN ONLY Input High Voltage, VIH 3.5 V Input Low Voltage, VIL 0.8 V Input Current ±2 μA Pin Capacitance 6 10 pF CLOCK FREQUENCY Input Frequency 6.144 MHz For Specified Performance POWER REQUIREMENTS VDD 4.75 5.25 V IDD (Normal Mode) 8 mA Output Unloaded IDD (Power-Down) 15 35 μA Power-Up Time3 30 μs Coming Out of Power-Down Mode NOTES 1Temperature ranges: B Version –40°C to +85°C: Y Version: –40°C to +105°C. 2See Terminology. 3Guaranteed by design and characterization, not production tested. 4Span = Maximum Output Frequency–Minimum Output Frequency. 5The absolute voltage on the input pin must not go more positive than V DD – 2.25 V or more negative than GND. 6Because this pin is bidirectional, any external reference must be capable of sinking/sourcing 400 μA in order to overdrive the internal reference. 7These logic levels apply to CLKOUT only when it is loaded with one CMOS load. Specifications subject to change without notice. –2– REV. A
DC PERFORMANCE Integral Nonlinearity fCLKIN = 200 kHz3 ±0.012 % of Span4 fCLKIN = 3 MHz3 ±0.012 % of Span fCLKIN = 6.144 MHz ±0.024 % of Span VDD > 4.8 V Offset Error ±40 mV Gain Error 0 +0.8 +1.6 % of Span Offset Error Drift3 ±30 μV/°C Gain Error Drift3 ±16 ppm of Span/°C Power Supply Rejection Ratio3 –63 dB ΔVDD = ±5% ANALOG INPUT5 Input Current ±50 ±100 nA Input Voltage Range 0 VREF V +2.5 V REFERENCE (REFIN/OUT) REFIN Nominal Input Voltage 2.5 V Input Impedance6 N/A REFOUT Output Voltage 2.38 2.50 2.60 V Output Impedance3 1 kΩ Reference Drift3 ±50 ppm/°C Line Rejection –60 dB Reference Noise (0.1 Hz to 10 Hz)3 100 μV p-p LOGIC OUTPUT Output High Voltage, VOH 4.0 V Output Sourcing 800 μA7 Output Low Voltage, VOL 0.4 V Output Sinking 1.6 mA7 Minimum Output Frequency 0.05 fCLKIN Hz VIN = 0 V Maximum Output Frequency 0.45 fCLKIN Hz VIN = VREF LOGIC INPUT PD ONLY Input High Voltage, VIH 2.4 V Input Low Voltage, VIL 0.8 V Input Current ±100 nA Pin Capacitance 6 10 pF CLKIN ONLY Input High Voltage, VIH 3.5 V Input Low Voltage, VIL 0.8 V Input Current ±2 μA Pin Capacitance 6 10 pF CLOCK FREQUENCY Input Frequency 6.144 MHz For Specified Performance POWER REQUIREMENTS VDD 4.75 5.25 V IDD (Normal Mode) 8 mA Output Unloaded IDD (Power-Down) 15 35 μA Power-Up Time3 30 μs Coming Out of Power-Down Mode NOTES 1Temperature ranges: B Version –40°C to +85°C: Y Version: –40°C to +105°C. 2See Terminology. 3Guaranteed by design and characterization, not production tested. 4Span = Maximum Output Frequency–Minimum Output Frequency. 5The absolute voltage on the input pin must not go more positive than V DD – 2.25 V or more negative than GND. 6Because this pin is bidirectional, any external reference must be capable of sinking/sourcing 400 μA in order to overdrive the internal reference. 7These logic levels apply to CLKOUT only when it is loaded with one CMOS load. Specifications subject to change without notice. –2– REV. A
