Datasheet > ADA4805-1

ADA4805-1

更新时间： 2024-12-02 01:03:03

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
25页	772K
描述
0.2 Î¼V/Â°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifiers

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ADA4805-1 数据手册

0.2 µV/°C Offset Drift, 105 MHz Low Power,

Low Noise, Rail-to-Rail Amplifiers

ADA4805-1/ADA4805-2

Data Sheet

FEATURES

TYPICAL APPLICATIONS CIRCUIT

+7.5V

Low input offset voltage: 125 µV (maximum)

Low input offset voltage drift

5V REF

ADA4805-1/

ADA4805-2

ADR435

VDD

0.2 µV/°C (typical)

1.5 µV/°C (maximum)

100nF

10µF

0.1µF

Ultralow supply current: 500 µA per amplifier

Fully specified at V_S= 3 V, 5 V, 5 V

High speed performance

−3 dB bandwidth: 105 MHz

Slew rate: 160 V/µs

+7.5V

ADA4805-1/

0V TO

REF

ADA4805-2

REF VDD

IN+

IN–

20Ω

AD7980

GND

Settling time to 0.1%: 35 ns

Rail-to-rail outputs

2.7nF

Input common-mode range: −V_S− 0.1 V to +V_S− 1 V

Low noise: 5.9 nV/√Hz at 100 kHz; 0.6 pA/√Hz at 100 kHz

Low distortion: −102 dBc/−126 dBc HD2/HD3 at 100 kHz

Low input bias current: 470 nA (typical)

Dynamic power scaling

Turn-on time: 3 µs (maximum) fully settled

Small packaging

6-lead SC70, 6-lead SOT-23, and 8-lead MSOP

Figure 1. Driving the AD7980 with the ADA4805-1/ADA4805-2

The Analog Devices, Inc., proprietary extra fast complementary

bipolar (XFCB) process allows both low voltage and low current

noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-1/ADA4805-2

operate over a wide range of supply voltages from 1.5 V to

5 V, as well as single 3 V and 5 V supplies, making them ideal

for high speed, low power instruments.

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

and a 10-lead LFCSP package. These amplifiers are rated to

work over the industrial temperature range of −40°C to +125°C.

APPLICATIONS

High resolution, high precision analog-to-digital converter

(ADC) drivers

Battery-powered instrumentation

Micropower active filters

Portable point of sales terminals

Active RFID readers

INPUT FREQUENCY = 10kHz

SNR = 89.4dB

–20

THD = 104dB

SINAD = 89.3dB

–40

Photo multipliers

ADC reference buffers

–60

–80

GENERAL DESCRIPTION

–100

–120

–140

–160

–180

The ADA4805-1/ADA4805-2 are high speed voltage feedback,

rail-to-rail output amplifiers with an exceptionally low

quiescent current of 500 µA, making them ideal for low power,

high resolution data conversion systems. Despite being low

power, these amplifiers provide excellent overall performance.

They offer a high bandwidth of 105 MHz at a gain of +1, a high

slew rate of 160 V/µs, and a low input offset voltage of 125 µV

(maximum).

FREQUENCY (kHz)

Figure 2. FFT Plot for the Circuit Configuration in Figure 1

Table 1. Complementary ADCs to the ADA4805-1/ADA4805-2

A shutdown pin allows further reduction of the quiescent

supply current to 2.9 µA. For power sensitive applications, the

shutdown mode offers a very fast turn-on time of 3 µs. This

allows the user to dynamically manage the power of the

amplifier by turning the amplifier off between ADC samples.

Throughput Resolution SNR

Product ADC Power (mW) (MSPS)

(Bits)

(dB)

AD7982

AD7984

AD7980

AD7685

7.0

10.5

4.0

1.33

98.5

0.25

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

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Technical Support

www.analog.com

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与ADA4805-1相关器件

型号	品牌	获取价格	描述	数据表
ADA4805-1AKSZ-EBZ	ADI	获取价格	0.2 Î¼V/Â°C Offset Drift, 105 MHz Low Power,
ADA4805-1AKSZ-R2	ADI	获取价格	0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplif
ADA4805-1AKSZ-R7	ADI	获取价格	0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplif
ADA4805-1ARJZ-EBZ	ADI	获取价格	0.2 Î¼V/Â°C Offset Drift, 105 MHz Low Power,
ADA4805-1ARJZ-R2	ADI	获取价格	0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplif
ADA4805-1ARJZ-R7	ADI	获取价格	0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplif
ADA4805-2	ADI	获取价格	0.2 Î¼V/Â°C Offset Drift, 105 MHz Low Power,
ADA4805-2ACPZ-EBZ	ADI	获取价格	0.2 Î¼V/Â°C Offset Drift, 105 MHz Low Power,
ADA4805-2ACPZ-R2	ADI	获取价格	Dual, 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail
ADA4805-2ACPZ-R7	ADI	获取价格	Dual, 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail

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