Datasheet ADA4938-1/ADA4938-2 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Ultralow Distortion Differential ADC Driver (Dual) |
| Pages / Page | 26 / 5 — Data Sheet. ADA4938-1/ADA4938-2. SINGLE-SUPPLY OPERATION. ±DIN to ±OUT … |
| Revision | B |
| File Format / Size | PDF / 605 Kb |
| Document Language | English |
Data Sheet. ADA4938-1/ADA4938-2. SINGLE-SUPPLY OPERATION. ±DIN to ±OUT Performance. Table 3. Parameter. Conditions. Min. Typ. Max. Unit
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Data Sheet ADA4938-1/ADA4938-2 SINGLE-SUPPLY OPERATION
TA = 25°C, +VS = 5 V, −VS = 0 V, VOCM = +VS/2, RT = 61.9 Ω, RG = RF = 200 Ω, G = +1, RL, dm = 1 kΩ, unless otherwise noted. All specifications refer to single-ended input and differential output, unless otherwise noted. For gains other than G = 1, values for RF and RG are shown in Table 11.
±DIN to ±OUT Performance Table 3. Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth VOUT = 0.1 V p-p 1000 MHz Bandwidth for 0.1 dB Flatness VOUT = 2 V p-p 150 MHz Large Signal Bandwidth VOUT = 2 V p-p 750 MHz Slew Rate VOUT = 2 V p-p 3900 V/µs Settling Time VOUT = 2 V p-p 6.5 ns Overdrive Recovery Time VIN = 2.5 V to 0 V step, G = +2 4 ns NOISE/HARMONIC PERFORMANCE Second Harmonic VOUT = 2 V p-p, 10 MHz −110 dBc VOUT = 2 V p-p, 50 MHz −79 dBc Third Harmonic VOUT = 2 V p-p, 10 MHz −100 dBc VOUT = 2 V p-p, 50 MHz −79 dBc Input Voltage Noise f = 10 MHz 2.6 nV/√Hz Noise Figure G = +4, f = 10 MHz 15.8 dB Input Current Noise f = 10 MHz 4.8 pA/√Hz Crosstalk (ADA4938-2) f = 100 MHz −85 dB INPUT CHARACTERISTICS Offset Voltage VOS, dm = VOUT, dm/2; VDIN+ = VDIN− = VOCM = 2.5 V 1 4 mV TMIN to TMAX variation ±4 µV/°C Input Bias Current −18 −13 µA TMIN to TMAX variation −0.01 µA/°C Input Resistance Differential 6 MΩ Common mode 3 MΩ Input Capacitance 1 pF Input Common-Mode Voltage −VS + 0.3 to +VS − 1.6 V CMRR ∆VOUT, dm/∆VIN, cm; ∆VIN, cm = ±1 V −80 dB OUTPUT CHARACTERISTICS Output Voltage Swing Maximum ∆VOUT; single-ended output −VS + 1.2 to +VS − 1.2 V Linear Output Current Per amplifier, RL, dm = 20 Ω, f = 10 MHz ±65 mA Output Balance Error ∆VOUT, cm/∆VOUT, dm; ∆VOUT, dm = 1 V −60 dB Rev. B | Page 5 of 26 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS REVISION HISTORY SPECIFICATIONS DUAL-SUPPLY OPERATION ±DIN to ±OUT Performance VOCM to ±OUT Performance SINGLE-SUPPLY OPERATION ±DIN to ±OUT Performance VOCM to ±OUT Performance ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Maximum Power Dissipation ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUTS TERMINOLOGY THEORY OF OPERATION ANALYZING AN APPLICATION CIRCUIT SETTING THE CLOSED-LOOP GAIN ESTIMATING THE OUTPUT NOISE VOLTAGE THE IMPACT OF MISMATCHES IN THE FEEDBACK NETWORKS CALCULATING THE INPUT IMPEDANCE OF AN APPLICATION CIRCUIT INPUT COMMON-MODE VOLTAGE RANGE IN SINGLE-SUPPLY APPLICATIONS TERMINATING A SINGLE-ENDED INPUT SETTING THE OUTPUT COMMON-MODE VOLTAGE LAYOUT, GROUNDING, AND BYPASSING HIGH PERFORMANCE ADC DRIVING OUTLINE DIMENSIONS ORDERING GUIDE
Data Sheet ADA4938-1/ADA4938-2 SINGLE-SUPPLY OPERATION
TA = 25°C, +VS = 5 V, −VS = 0 V, VOCM = +VS/2, RT = 61.9 Ω, RG = RF = 200 Ω, G = +1, RL, dm = 1 kΩ, unless otherwise noted. All specifications refer to single-ended input and differential output, unless otherwise noted. For gains other than G = 1, values for RF and RG are shown in Table 11.
±DIN to ±OUT Performance Table 3. Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth VOUT = 0.1 V p-p 1000 MHz Bandwidth for 0.1 dB Flatness VOUT = 2 V p-p 150 MHz Large Signal Bandwidth VOUT = 2 V p-p 750 MHz Slew Rate VOUT = 2 V p-p 3900 V/µs Settling Time VOUT = 2 V p-p 6.5 ns Overdrive Recovery Time VIN = 2.5 V to 0 V step, G = +2 4 ns NOISE/HARMONIC PERFORMANCE Second Harmonic VOUT = 2 V p-p, 10 MHz −110 dBc VOUT = 2 V p-p, 50 MHz −79 dBc Third Harmonic VOUT = 2 V p-p, 10 MHz −100 dBc VOUT = 2 V p-p, 50 MHz −79 dBc Input Voltage Noise f = 10 MHz 2.6 nV/√Hz Noise Figure G = +4, f = 10 MHz 15.8 dB Input Current Noise f = 10 MHz 4.8 pA/√Hz Crosstalk (ADA4938-2) f = 100 MHz −85 dB INPUT CHARACTERISTICS Offset Voltage VOS, dm = VOUT, dm/2; VDIN+ = VDIN− = VOCM = 2.5 V 1 4 mV TMIN to TMAX variation ±4 µV/°C Input Bias Current −18 −13 µA TMIN to TMAX variation −0.01 µA/°C Input Resistance Differential 6 MΩ Common mode 3 MΩ Input Capacitance 1 pF Input Common-Mode Voltage −VS + 0.3 to +VS − 1.6 V CMRR ∆VOUT, dm/∆VIN, cm; ∆VIN, cm = ±1 V −80 dB OUTPUT CHARACTERISTICS Output Voltage Swing Maximum ∆VOUT; single-ended output −VS + 1.2 to +VS − 1.2 V Linear Output Current Per amplifier, RL, dm = 20 Ω, f = 10 MHz ±65 mA Output Balance Error ∆VOUT, cm/∆VOUT, dm; ∆VOUT, dm = 1 V −60 dB Rev. B | Page 5 of 26 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS REVISION HISTORY SPECIFICATIONS DUAL-SUPPLY OPERATION ±DIN to ±OUT Performance VOCM to ±OUT Performance SINGLE-SUPPLY OPERATION ±DIN to ±OUT Performance VOCM to ±OUT Performance ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Maximum Power Dissipation ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUTS TERMINOLOGY THEORY OF OPERATION ANALYZING AN APPLICATION CIRCUIT SETTING THE CLOSED-LOOP GAIN ESTIMATING THE OUTPUT NOISE VOLTAGE THE IMPACT OF MISMATCHES IN THE FEEDBACK NETWORKS CALCULATING THE INPUT IMPEDANCE OF AN APPLICATION CIRCUIT INPUT COMMON-MODE VOLTAGE RANGE IN SINGLE-SUPPLY APPLICATIONS TERMINATING A SINGLE-ENDED INPUT SETTING THE OUTPUT COMMON-MODE VOLTAGE LAYOUT, GROUNDING, AND BYPASSING HIGH PERFORMANCE ADC DRIVING OUTLINE DIMENSIONS ORDERING GUIDE
