ADA4941-1YCPZ-R7 Analog Devices Inc, ADA4941-1YCPZ-R7 Datasheet
ADA4941-1YCPZ-R7
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ADA4941-1YCPZ-R7 Summary of contents
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... The ADA4941-1 is manufactured on ADI’s proprietary second- generation XFCB process, which enables the amplifier to achieve 18-bit performance on low supply currents. The ADA4941-1 is available in a small 8-lead LFCSP as well as a standard 8-lead SOIC and is rated to work over the extended industrial temperature range, −40°C to +125°C. ...
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... ADA4941-1 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution .................................................................................. 6 Pin Configuration and Function Descriptions ............................. 7 Typical Performance Characteristics ............................................. 8 Theory of Operation ...................................................................... 15 Basic Operation .......................................................................... 15 DC Error Calculations ............................................................... 16 REVISION HISTORY 8/10—Rev Rev. B Added Caption to Figure 1 .............................................................. 1 Added Exposed Pad Notation to Figure 4 and Table 6 ...
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... Each single-ended output 20% overshoot 200 mV p-p O PSRR = V /Δ OS Disabled, DIS = High Enabled, DIS = Low Disabled, DIS = High Enabled, DIS = Low Rev Page ADA4941-1 Min Typ Max Unit 21 30 MHz 4.6 6.5 MHz 320/650 ns 22 V/μs 300 ns −116/−112 dBc − ...
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... ADA4941 25° OUT+ connected 2 Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Overdrive Recovery Time Slew Rate Settling Time 0.005% NOISE/DISTORTION PERFORMANCE Harmonic Distortion RTO Voltage Noise Input Current Noise DC PERFORMANCE Differential Output Offset Voltage Differential Input Offset Voltage Drift Single-Ended Input Offset Voltage ...
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... OS −4 +3 Each single-ended output 20% overshoot 200 mV p-p O PSRR = V /Δ OS Disabled, DIS = High Enabled, DIS = Low Disabled, DIS = High Enabled, DIS = Low Rev Page ADA4941-1 Min Typ Max Unit 23 32 MHz 5.2 7.5 MHz 200/650 ns 26 V/μs 980 ns −118/−119 dBc −109/−112 dBc − ...
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... Even temporarily exceeding this temperature limit can change the stresses that the package exerts on the die, permanently shifting the parametric performance of the ADA4941-1. Exceeding a junction temperature of 150°C for an extended period can result in changes in the silicon devices potentially causing failure ...
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... Positive Power Supply Noninverting Output Inverting Output Negative Power Supply Disable Input Exposed Paddle. The exposed pad is not electrically connected to the device typically soldered to ground or a power plane on the PCB that is thermally conductive. Rev Page DIS 6 V– OUT– 5 ADA4941-1 ...
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... ADA4941-1 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 –11 –12 –13 –14 – +3V S – FREQUENCY (MHz) Figure 5. Small Signal Frequency Response for Various Power Supplies –1 –2 –3 –4 –5 –6 – ...
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... FREQUENCY (MHz) Figure 15. Frequency Response for Various Output Amplitudes – p VREF = MIDSUPPLY –80 –90 HD3 –110 HD2 HD2 0 100 FREQUENCY (kHz) Figure 16. Distortion vs. Frequency for Various Loads ADA4941 p 1000 = 0.1V p-p 1000 R = 2kΩ 1kΩ 500Ω L 1000 ...
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... ADA4941-1 – 10kHz – –85 –95 –105 HD3 –115 HD2 –125 HD2 HD3 –135 OUTPUT AMPLITUDE (V p-p) Figure 17. Distortion vs. Output Amplitude for Various Supplies (G = +2) – p –65 VREF = MIDSUPPLY –70 –75 –80 –85 –90 –95 –100 –105 HD2 –110 –115 HD3 – ...
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... Figure 26. Large Signal Transient Response for Various Supplies 2 12V p-p 1 –0.6 4 –1.2 3 –1.8 2 1µs/DIV –2 ± –2 –4 –6 1µs/DIV –8 = ± Rev Page ADA4941 ± 12V p ±2. p ±1. p 200ns/DIV ERROR = 2 × V – × 1µs/DIV Figure 27 ...
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... ADA4941-1 0 –10 –20 –30 –40 +PSRR –50 –60 –PSRR –70 –80 –90 –100 –110 0.001 0.01 0.1 1 FREQUENCY (MHz) Figure 29. Power Supply Rejection Ratio vs. Frequency 3 S– 3 + ± +3V S 1.5 1.0 –40 – TEMPERATURE (°C) Figure 30. Power Supply Current vs. Temperature ...
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... BIAS 2.0 80 100 120 Figure 40. REF Input Bias Current vs. REF Input Voltage Rev Page ADA4941 100 1k 10k 100k FREQUENCY (Hz) Figure 38. Input Current Noise vs. Frequency V = ± 0.5 1.5 2.5 3.5 4 ...
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... ADA4941 ± –40 – TEMPERATURE (°C) Figure 41. Disable Supply Current vs. Temperature for Various Supplies 40µs/DIV Figure 42. Disable Assert Time –40 VIN = 50mV p-p –50 –60 –70 –80 –90 –100 –110 0 FREQUENCY (MHz) Figure 43. Disabled Input-to-Output Isolation vs. Frequency 1kΩ ∞ DIS = HIGH ...
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... THEORY OF OPERATION The ADA4941 low power, single-ended input, differential output amplifier optimized for driving high resolution ADCs. Figure 47 illustrates how the ADA4941-1 is typically connected. The amplifier is composed of an uncommitted amplifier, A1, driving a precision inverter, A2. The negative input brought out to Pin 1 (FB), allowing for user-programmable gain ...
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... VON_error = −( VOP_error ) + 2[ V (8) The differential output voltage error V difference between VOP_error and VON_error: V The output offset voltage of each amplifier in the ADA4941-1 also includes the effects of finite common-mode rejection ratio OUT+ 4 (CMRR), power supply rejection ratio (PSRR), and dc open- + VOP loop gain (A – ...
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... REF S– Figure 52. Noise Sources Figure 52 shows the major contributors to the ADA4941-1 differential output voltage noise. The differential output noise mean-square voltage equals the sum of twice the noise mean- _REF = 0 Ω S square voltage contributions from the noninverting channel (A1), plus the noise mean-square voltage terms associated with the inverting channel (A2) ...
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... ADA4941-1 Table 10. Output Voltage Noise 2.4 Differential Amplifier Shown in Figure 48 Noise Source Typical Value VOP Contribution (nV√Hz) vn_A1 2.1 nV/√Hz 2.5 ip_A1 1 pA/√Hz 1 in_A1 1 pA/√Hz 1 √4 kTR 4 nV/√ nV/√Hz 1.8 √4 kTR G √4 kTR 3.6 nV/√Hz 4.4 S vn_inverter 9.2 nV/√ ...
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... FREQUENCY RESPONSE VS. CLOSED-LOOP GAIN The operational amplifiers used in the ADA4941-1 are voltage feedback with an open-loop frequency response that can be approximated with the integrator response, as shown in Figure 53. 100 0.001 0.01 0.1 1 FREQUENCY (MHz) Figure 53. ADA4941-1 Op Amp Open-Loop Gain vs. Frequency For each amplifier, the frequency response can be approximated by the following equations: ⎛ ...
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... For ac signals, rms analysis is required. DISABLE FEATURE The ADA4941-1 includes a disable feature that can be asserted to minimize power consumption in a device that is not needed at a particular time. When asserted, the disable feature does not place the device output in a high impedance or tristate condition ...
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... ADDING A 3-POLE, SALLEN-KEY FILTER The noninverting amplifier in the ADA4941-1 can be used as the buffer amplifier of a Sallen-Key filter. A 3-pole, low-pass filter can be designed to limit the signal bandwidth in front of an ADC. The input signal first passes through the noninverting stage where it is filtered. The filtered signal is then passed through the inverting stage to obtain the complementary output. 562Ω ...
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... V reference that is buffered by one of the AD8032 amplifiers and applied to the AD7687 REF input, providing a differential input full-scale level The reference voltage is also divided by two and buffered to supply the midsupply REF level of 1.5 V for the ADA4941-1. 562Ω 562Ω VIN 3.9nF ADR443 ...
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... ADA4941-1YRZ −40°C to +125°C ADA4941-1YRZ-RL −40°C to +125°C ADA4941-1YRZ-R7 −40°C to +125°C ADA4941-1YCPZ-R2 −40°C to +125°C ADA4941-1YCPZ-RL −40°C to +125°C ADA4941-1YCPZ-R7 −40°C to +125°C ADA4941-1YCP-EBZ ADA4941-1YR-EBZ RoHS Compliant Part. 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4 ...
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... ADA4941-1 NOTES ©2006–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05704-0-8/10(B) Rev Page ...