High Voltage, Low Noise, Low Distortion, Unity …

1 high voltage , low noise , Low distortion , Unity -Gain Stable, high Speed Op Amp Data Sheet ada4898 -1/ ada4898 -2. FEATURES CONNECTION DIAGRAM. Ultralow noise ada4898 -1. TOP VIEW. nV/ Hz (Not to Scale). pA/ Hz NC 1 8 PD. nV/ Hz at 10 Hz IN 2 7 +VS. +IN 3 6 VOUT. Ultralow distortion : 93 dBc at 500 kHz VS 4 5 NC. 07037-001. Wide supply voltage range: 5 V to 16 V. high speed NC = NO CONNECT. 3 dB bandwidth: 65 MHz (G = +1) Figure 1. Single 8-Lead ada4898 -1 SOIC_N_EP (RD-8-1). Slew rate: 55 V/ s ada4898 -2. Unity gain stable TOP VIEW. (Not to Scale). Low input offset voltage : 160 V maximum VOUT1 1 8 +VS. Low input offset voltage drift: 1 V/ C. IN1 2 7 VOUT2. Low input bias current: A. Low input bias current drift: 2 nA/ C +IN1 3 6 IN2.

2 07037-050. Supply current: 8 mA VS 4 5 +IN2. Power-down feature for single 8-lead package Figure 2. Dual 8-Lead ada4898 -2 SOIC_N_EP (RD-8-2). APPLICATIONS. Instrumentation Active filters DAC buffers SAR ADC drivers Optoelectronics GENERAL DESCRIPTION. 10 10. The ada4898 -1/ ada4898 -2 are ultralow noise and distortion , Unity gain stable, voltage feedback op amps that are ideal for use in 16-bit and 18-bit systems with power supplies from 5 V to CURRENT. 16 V. The ada4898 -1/ ada4898 -2 feature a linear, low noise voltage noise (nV/ Hz). CURRENT noise (pA/ Hz). input stage and internal compensation that achieves high slew rates and low noise . voltage . 1 1. With the wide supply voltage range, low offset voltage , and wide bandwidth, the ada4898 -1/ ada4898 -2 are extremely versatile, and feature a cancellation circuit that reduces input bias current.

3 The ada4898 -1/ ada4898 -2 are available in an 8-lead SOIC. package that features an exposed metal paddle to improve power dissipation and heat transfer to the negative supply plane. This 1 10 100 1k 10k 100k 07037-002. EPAD offers a significant thermal relief over traditional plastic FREQUENCY (Hz). packages. The ada4898 -1/ ada4898 -2 are rated to work over Figure 3. Input voltage noise and Current noise vs. Frequency the extended industrial temperature range of 40 C to +105 C. Rev. E Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use.

4 Specifications subject to change without notice. No One Technology Way, Box 9106, Norwood, MA 02062-9106, license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 2008 2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support ada4898 -1/ ada4898 -2 Data Sheet TABLE OF CONTENTS. Features .. 1 Test 13. Applications .. 1 Theory of Operation .. 14. Connection Diagram .. 1 PD (Power-Down) Pin for the 14. General Description .. 1 Applications Information .. 15. Revision History .. 2 Higher Feedback Resistor Gain Operation .. 15. 3 Recommended Values for Various 15. 15 V Supply .. 3 noise .. 16. 5 V Supply.

5 4 Circuit Considerations .. 16. Absolute Maximum Ratings .. 5 PCB Layout .. 16. Thermal Resistance .. 5 Power Supply Bypassing .. 16. Maximum Power Dissipation .. 5 Grounding .. 16. ESD Caution .. 5 Outline Dimensions .. 17. Pin Configurations and Function Descriptions .. 6 Ordering Guide .. 17. Typical Performance Characteristics .. 7. REVISION HISTORY. 5/15 Rev. D to Rev. E 6/09 Rev. A to Rev. B. Deleted Hz to 10 Hz noise Section, Figure 45, and Changes to General Description Section ..1. Figure 46; Renumbered Sequentially .. 14 Changes to Specifications Section ..3. Updated Outline Dimensions .. 17 Changes to Figure 29 and Figure 31 .. 11. Changes to Ordering Guide .. 17 Added Figure 32 .. 12. Added Figure 41 .. 13. 5/12 Rev.

6 C to Rev. D Changes to PD (Power-Down) Pin Section .. 14. Changes to Figure 2 Caption .. 1 Added Table 6 .. 14. Updated Outline Dimensions .. 17 Changes to Figure 15. Changes to Ordering Guide .. 17. 8/08 Rev. 0 to Rev. A. 2/10 Rev. B to Rev. C Changes to General Description Section ..1. Added ada4898 -2 .. Throughout Changes to Table Changes to 1 Changes to Figure Changes to Table 1 .. 3 Changes to Figure 10. Changes to Table 2 .. 4 Changes to Figure 29 and Figure 32 .. 11. Changes to Figure 38, Figure 40, Figure 41 .. 14 Added Hz to 10 Hz noise 14. Changes to Figure 46 .. 15 Added Figure 42 and Figure 43; Renumbered Sequentially .. 14. Changes to Figure 47 .. 16 Changes to Grounding 16. Changes to PCB Layout Section .. 17 Updated Outline Dimensions.

7 17. Changes to Ordering Guide .. 20. 5/08 Revision 0: Initial Version Rev. E | Page 2 of 20. Data Sheet ada4898 -1/ ada4898 -2. SPECIFICATIONS. 15 V SUPPLY. TA = 25 C, G = +1, RF = 0 , RG open, RL = 1 k to GND (for G > 1, RF = 100 ), unless otherwise noted. Table 1. Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE. 3 dB Bandwidth VOUT = 100 mV p-p 65 MHz VOUT = 2 V p-p 14 MHz Bandwidth for dB Flatness G = +2, VOUT = 2 V p-p MHz Slew Rate VOUT = 5 V step 55 V/ s Settling Time to VOUT = 5 V step 85 ns noise / distortion PERFORMANCE. Harmonic distortion SFDR f = 100 kHz, VOUT = 2 V p-p 116 dBc f = 500 kHz, VOUT = 2 V p-p 93 dBc f = 1 MHz, VOUT = 2 V p-p 79 dBc Input voltage noise f = 1 kHz nV/ Hz Input Current noise f = 1 kHz pA/ Hz DC PERFORMANCE.

8 Input Offset voltage RF = 1 k , see Figure 43 20 125 V. Input Offset voltage Drift RF = 1 k , see Figure 43 1 V/ C. Input Bias Current RF = 1 k , see Figure 43 A. Input Bias Offset Current RF = 1 k , see Figure 43 A. Input Bias Current Drift RF = 1 k , see Figure 43 2 nA/ C. Open-Loop Gain VOUT = 5 V 99 103 dB. INPUT CHARACTERISTICS. Input Resistance Differential mode 5 k . Common mode 30 M . Input Capacitance Differential mode pF. Common mode pF. Input Common-Mode voltage Range See Figure 43 11 V. Common-Mode Rejection Ratio VCM = 2 V 103 126 dB. PD (POWER-DOWN) PIN ( ada4898 -1). PD Input Voltages Chip powered down 14 V. Chip enabled 13 V. PD Turn On Time VOUT = 100 mV p-p 100 ns PD Turn Off Time VOUT = 100 mV p-p 20 s Input Leakage Current PD = +VS A.

9 PD = VS A. OUTPUT CHARACTERISTICS. Output voltage Swing RL // (RF + RG) = 500 , see Figure 43 to + to + V. RL // (RF + RG) = 1 k , see Figure 43 to + to + V. Linear Output Current f = 100 kHz, SFDR = 70 dBc, RL = 150 40 mA. Short-Circuit Current Sinking/sourcing 150 mA. Off Isolation f = 1 MHz, PD = VS 80 dB. POWER SUPPLY. Operating Range V. Quiescent Current per Amplifier PD = +VS mA. PD = VS mA. Positive Power Supply Rejection Ratio +VS = 15 V to 17 V, VS = 15 V 98 107 dB. Negative Power Supply Rejection Ratio +VS = 15 V, VS = 15 V to 17 V 100 114 dB. Rev. E | Page 3 of 20. ada4898 -1/ ada4898 -2 Data Sheet 5 V SUPPLY. TA = 25 C, G = +1, RF = 0 , RG open, RL = 1 k to GND (for G > 1, RF = 100 ), unless otherwise noted. Table 2.

10 Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE. 3 dB Bandwidth VOUT = 100 mV p-p 57 MHz VOUT = 2 V p-p 12 MHz Bandwidth for dB Flatness G = +2, VOUT = 2 V p-p 3 MHz Slew Rate VOUT = 2 V step 50 V/ s Settling Time to VOUT = 2 V step 90 ns noise / distortion PERFORMANCE. Harmonic distortion SFDR f = 100 kHz, VOUT = 2 V p-p 110 dBc f = 500 kHz, VOUT = 2 V p-p 95 dBc f = 1 MHz, VOUT = 2 V p-p 78 dBc Input voltage noise f = 1 kHz nV/ Hz Input Current noise f = 1 kHz pA/ Hz DC PERFORMANCE. Input Offset voltage RF = 1 k , see Figure 43 30 160 V. Input Offset voltage Drift RF = 1 k , see Figure 43 1 V/ C. Input Bias Current RF = 1 k , see Figure 43 A. Input Bias Offset Current RF = 1 k , see Figure 43 A. Input Bias Current Drift RF = 1 k , see Figure 43 2 nA/ C.