Datasheet ADA4805-1, ADA4805-2 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier |
| Pages / Page | 25 / 1 — 0.2 µV/°C Offset Drift, 105 MHz Low Power,. Low Noise, Rail-to-Rail … |
| Revision | B |
| File Format / Size | PDF / 784 Kb |
| Document Language | English |
0.2 µV/°C Offset Drift, 105 MHz Low Power,. Low Noise, Rail-to-Rail Amplifiers. Data Sheet. ADA4805-1. /ADA4805-2. FEATURES
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0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifiers Data Sheet ADA4805-1 /ADA4805-2 FEATURES TYPICAL APPLICATIONS CIRCUIT Low input offset voltage: 125 µV (maximum) +7.5V 5V REF ADA4805-1/ Low input offset voltage drift ADA4805-2 ADR435 0.2 µV/°C (typical) VDD C2 C3 C4 1.5 µV/°C (maximum) 10µF 0.1µF 100nF Ultralow supply current: 500 µA per amplifier Fully specified at V +7.5V S = 3 V, 5 V, ±5 V ADA4805-1/ High speed performance 0V TO ADA4805-2 V REF VDD REF −3 dB bandwidth: 105 MHz IN+ R3 Slew rate: 160 V/µs 20Ω AD7980 IN– Settling time to 0.1%: 35 ns GND C1
010
Rail-to-rail outputs 2.7nF
1345- 1
Input common-mode range: −VS − 0.1 V to +VS − 1 V
Figure 1. Driving the AD7980 with the ADA4805-1/ADA4805-2
Low noise: 5.9 nV/√Hz at 100 kHz; 0.6 pA/√Hz at 100 kHz
The Analog Devices, Inc., proprietary extra fast complementary
Low distortion: −102 dBc/−126 dBc HD2/HD3 at 100 kHz Low input bias current: 470 nA (typical)
bipolar (XFCB) process allows both low voltage and low current
Dynamic power scaling
noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-1/ADA4805-2
Turn-on time: 3 µs (maximum) fully settled
operate over a wide range of supply voltages from ±1.5 V to
Small packaging
±5 V, as well as single 3 V and 5 V supplies, making them ideal
6-lead SC70, 6-lead SOT-23, and 8-lead MSOP
for high speed, low power instruments.
APPLICATIONS
The ADA4805-1 is available in a 6-lead SOT-23 and a 6-lead SC70 package. The ADA4805-2 is available in an 8-lead MSOP
High resolution, high precision analog-to-digital converter
and a 10-lead LFCSP package. These amplifiers are rated to
(ADC) drivers
work over the industrial temperature range of −40°C to +125°C.
Battery-powered instrumentation 0 Micropower active filters INPUT FREQUENCY = 10kHz SNR = 89.4dB Portable point of sales terminals –20 THD = 104dB SINAD = 89.3dB Active RFID readers –40 Photo multipliers –60 B) ADC reference buffers d ( –80 GENERAL DESCRIPTION UDE IT L –100 P
The ADA4805-1/ADA4805-2 are high speed voltage feedback,
AM –120
rail-to-rail output amplifiers with an exceptionally low quiescent current of 500 µA, making them ideal for low power,
–140
high resolution data conversion systems. Despite being low
–160
power, these amplifiers provide excellent overall performance.
–180
They offer a high bandwidth of 105 MHz at a gain of +1, a high
0 10 20 30 40 50 60 70 80
102 slew rate of 160 V/µs, and a low input offset voltage of 125 µV
FREQUENCY (kHz)
1345- 1 Figure 2. FFT Plot for the Circuit Configuration in Figure 1 (maximum). A shutdown pin allows further reduction of the quiescent
Table 1. Complementary ADCs to the ADA4805-1/ ADA4805-2
supply current to 2.9 µA. For power sensitive applications, the
Throughput Resolution SNR Product ADC Power (mW) (MSPS) (Bits) (dB)
shutdown mode offers a very fast turn-on time of 3 µs. This AD7982 7.0 1 18 98 allows the user to dynamically manage the power of the AD7984 10.5 1.33 18 98.5 amplifier by turning the amplifier off between ADC samples. AD7980 4.0 1 16 91 AD7685 10 0.25 16 88
Rev. B 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. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATIONS CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ±5 V SUPPLY 5 V SUPPLY 3 V SUPPLY ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION AMPLIFIER DESCRIPTION INPUT PROTECTION SHUTDOWN OPERATION NOISE CONSIDERATIONS APPLICATIONS INFORMATION SLEW ENHANCEMENT EFFECT OF FEEDBACK RESISTOR ON FREQUENCY RESPONSE COMPENSATING PEAKING IN LARGE SIGNAL FREQUENCY RESPONSE DRIVING LOW POWER, HIGH RESOLUTION SUCCESSIVE APPROXIMATION REGISTER (SAR) ADCs DYNAMIC POWER SCALING SINGLE-ENDED TO DIFFERENTIAL CONVERSION LAYOUT CONSIDERATIONS Ground Plane Power Supply Bypassing OUTLINE DIMENSIONS ORDERING GUIDE
0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifiers Data Sheet ADA4805-1 /ADA4805-2 FEATURES TYPICAL APPLICATIONS CIRCUIT Low input offset voltage: 125 µV (maximum) +7.5V 5V REF ADA4805-1/ Low input offset voltage drift ADA4805-2 ADR435 0.2 µV/°C (typical) VDD C2 C3 C4 1.5 µV/°C (maximum) 10µF 0.1µF 100nF Ultralow supply current: 500 µA per amplifier Fully specified at V +7.5V S = 3 V, 5 V, ±5 V ADA4805-1/ High speed performance 0V TO ADA4805-2 V REF VDD REF −3 dB bandwidth: 105 MHz IN+ R3 Slew rate: 160 V/µs 20Ω AD7980 IN– Settling time to 0.1%: 35 ns GND C1
010
Rail-to-rail outputs 2.7nF
1345- 1
Input common-mode range: −VS − 0.1 V to +VS − 1 V
Figure 1. Driving the AD7980 with the ADA4805-1/ADA4805-2
Low noise: 5.9 nV/√Hz at 100 kHz; 0.6 pA/√Hz at 100 kHz
The Analog Devices, Inc., proprietary extra fast complementary
Low distortion: −102 dBc/−126 dBc HD2/HD3 at 100 kHz Low input bias current: 470 nA (typical)
bipolar (XFCB) process allows both low voltage and low current
Dynamic power scaling
noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-1/ADA4805-2
Turn-on time: 3 µs (maximum) fully settled
operate over a wide range of supply voltages from ±1.5 V to
Small packaging
±5 V, as well as single 3 V and 5 V supplies, making them ideal
6-lead SC70, 6-lead SOT-23, and 8-lead MSOP
for high speed, low power instruments.
APPLICATIONS
The ADA4805-1 is available in a 6-lead SOT-23 and a 6-lead SC70 package. The ADA4805-2 is available in an 8-lead MSOP
High resolution, high precision analog-to-digital converter
and a 10-lead LFCSP package. These amplifiers are rated to
(ADC) drivers
work over the industrial temperature range of −40°C to +125°C.
Battery-powered instrumentation 0 Micropower active filters INPUT FREQUENCY = 10kHz SNR = 89.4dB Portable point of sales terminals –20 THD = 104dB SINAD = 89.3dB Active RFID readers –40 Photo multipliers –60 B) ADC reference buffers d ( –80 GENERAL DESCRIPTION UDE IT L –100 P
The ADA4805-1/ADA4805-2 are high speed voltage feedback,
AM –120
rail-to-rail output amplifiers with an exceptionally low quiescent current of 500 µA, making them ideal for low power,
–140
high resolution data conversion systems. Despite being low
–160
power, these amplifiers provide excellent overall performance.
–180
They offer a high bandwidth of 105 MHz at a gain of +1, a high
0 10 20 30 40 50 60 70 80
102 slew rate of 160 V/µs, and a low input offset voltage of 125 µV
FREQUENCY (kHz)
1345- 1 Figure 2. FFT Plot for the Circuit Configuration in Figure 1 (maximum). A shutdown pin allows further reduction of the quiescent
Table 1. Complementary ADCs to the ADA4805-1/ ADA4805-2
supply current to 2.9 µA. For power sensitive applications, the
Throughput Resolution SNR Product ADC Power (mW) (MSPS) (Bits) (dB)
shutdown mode offers a very fast turn-on time of 3 µs. This AD7982 7.0 1 18 98 allows the user to dynamically manage the power of the AD7984 10.5 1.33 18 98.5 amplifier by turning the amplifier off between ADC samples. AD7980 4.0 1 16 91 AD7685 10 0.25 16 88
Rev. B 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. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATIONS CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ±5 V SUPPLY 5 V SUPPLY 3 V SUPPLY ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION AMPLIFIER DESCRIPTION INPUT PROTECTION SHUTDOWN OPERATION NOISE CONSIDERATIONS APPLICATIONS INFORMATION SLEW ENHANCEMENT EFFECT OF FEEDBACK RESISTOR ON FREQUENCY RESPONSE COMPENSATING PEAKING IN LARGE SIGNAL FREQUENCY RESPONSE DRIVING LOW POWER, HIGH RESOLUTION SUCCESSIVE APPROXIMATION REGISTER (SAR) ADCs DYNAMIC POWER SCALING SINGLE-ENDED TO DIFFERENTIAL CONVERSION LAYOUT CONSIDERATIONS Ground Plane Power Supply Bypassing OUTLINE DIMENSIONS ORDERING GUIDE
