Datasheet ADA4950-1/ADA4950-2 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Low Power Selectable Gain Differential ADC Driver, G = 1, 2, 3 |
| Seiten / Seite | 26 / 4 — ADA4950-1/ADA4950-2. Data Sheet. VOCM to VOUT, cm Performance. Table 2. … |
| Revision | B |
| Dateiformat / Größe | PDF / 608 Kb |
| Dokumentensprache | Englisch |
ADA4950-1/ADA4950-2. Data Sheet. VOCM to VOUT, cm Performance. Table 2. Parameter. Test Conditions/Comments. Min. Typ. Max. Unit
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ADA4950-1/ADA4950-2 Data Sheet VOCM to VOUT, cm Performance Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
VOCM DYNAMIC PERFORMANCE −3 dB Small-Signal Bandwidth VOUT, cm = 100 mV p-p 250 MHz −3 dB Large-Signal Bandwidth VOUT, cm = 2 V p-p 105 MHz Slew Rate VIN = 1.5 V to 3.5 V, 25% to 75% 430 V/µs Input Voltage Noise (Referred to Input) f = 1 MHz 9.8 nV/√Hz VOCM INPUT CHARACTERISTICS Input Voltage Range –VS + 1.2 to V +VS – 1.2 Input Resistance 22 26 32 kΩ Input Offset Voltage V+DIN = V−DIN = 0 V −6 +0.8 +6 mV VOCM CMRR ΔVOUT, dm/ΔVOCM, ΔVOCM = ±1 V −60 −49 dB Gain ΔVOUT, cm/ΔVOCM, ΔVOCM = ±1 V 0.98 1.0 1.01 V/V
General Performance Table 3. Parameter Test Conditions/Comments Min Typ Max Unit
POWER SUPPLY Operating Range 3.0 11 V Quiescent Current per Amplifier 8.8 9.5 10.1 mA TMIN to TMAX variation 31 µA/°C Powered down 0.7 1.0 mA Power Supply Rejection Ratio ΔVOUT, dm/ΔVS, ΔVS = 1 V p-p −96 −84 dB POWER-DOWN (PD) PD Input Voltage Powered down ≤(+VS – 2.5) V Enabled ≥(+VS – 1.8) V Turn-Off Time 600 ns Turn-On Time 28 ns PD Pin Bias Current per Amplifier Enabled PD = 5 V −1.0 +0.2 +1.0 µA Disabled PD = 0 V −250 −180 −140 µA OPERATING TEMPERATURE RANGE −40 +105 °C Rev. B | Page 4 of 26 Document Outline Features Applications General Description Functional Block Diagrams Table of Contents Revision History Specifications ±5 V Operation Differential Inputs to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance 5 V Operation Differential Inputs to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance Absolute Maximum Ratings Thermal Resistance Maximum Power Dissipation ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Test Circuits Terminology Theory of Operation Applications Information Analyzing an Application Circuit Selecting the Closed-Loop Gain Estimating the Output Noise Voltage Calculating the Input Impedance for an Application Circuit Terminating a Single-Ended Input Input Common-Mode Voltage Range Input and Output Capacitive AC Coupling Input Signal Swing Considerations Setting the Output Common-Mode Voltage Layout, Grounding, and Bypassing High Performance ADC Driving Outline Dimensions Ordering Guide
VOCM DYNAMIC PERFORMANCE −3 dB Small-Signal Bandwidth VOUT, cm = 100 mV p-p 250 MHz −3 dB Large-Signal Bandwidth VOUT, cm = 2 V p-p 105 MHz Slew Rate VIN = 1.5 V to 3.5 V, 25% to 75% 430 V/µs Input Voltage Noise (Referred to Input) f = 1 MHz 9.8 nV/√Hz VOCM INPUT CHARACTERISTICS Input Voltage Range –VS + 1.2 to V +VS – 1.2 Input Resistance 22 26 32 kΩ Input Offset Voltage V+DIN = V−DIN = 0 V −6 +0.8 +6 mV VOCM CMRR ΔVOUT, dm/ΔVOCM, ΔVOCM = ±1 V −60 −49 dB Gain ΔVOUT, cm/ΔVOCM, ΔVOCM = ±1 V 0.98 1.0 1.01 V/V
General Performance Table 3. Parameter Test Conditions/Comments Min Typ Max Unit
POWER SUPPLY Operating Range 3.0 11 V Quiescent Current per Amplifier 8.8 9.5 10.1 mA TMIN to TMAX variation 31 µA/°C Powered down 0.7 1.0 mA Power Supply Rejection Ratio ΔVOUT, dm/ΔVS, ΔVS = 1 V p-p −96 −84 dB POWER-DOWN (PD) PD Input Voltage Powered down ≤(+VS – 2.5) V Enabled ≥(+VS – 1.8) V Turn-Off Time 600 ns Turn-On Time 28 ns PD Pin Bias Current per Amplifier Enabled PD = 5 V −1.0 +0.2 +1.0 µA Disabled PD = 0 V −250 −180 −140 µA OPERATING TEMPERATURE RANGE −40 +105 °C Rev. B | Page 4 of 26 Document Outline Features Applications General Description Functional Block Diagrams Table of Contents Revision History Specifications ±5 V Operation Differential Inputs to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance 5 V Operation Differential Inputs to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance Absolute Maximum Ratings Thermal Resistance Maximum Power Dissipation ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Test Circuits Terminology Theory of Operation Applications Information Analyzing an Application Circuit Selecting the Closed-Loop Gain Estimating the Output Noise Voltage Calculating the Input Impedance for an Application Circuit Terminating a Single-Ended Input Input Common-Mode Voltage Range Input and Output Capacitive AC Coupling Input Signal Swing Considerations Setting the Output Common-Mode Voltage Layout, Grounding, and Bypassing High Performance ADC Driving Outline Dimensions Ordering Guide