ada4932 Analog Devices, Inc., ada4932 Datasheet

ada4932

Manufacturer Part Number

ada4932

Description

Low Power Differential Adc Driver

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADA4932.pdf (28 pages)

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FEATURES

High performance at low power

High speed

Low power: 9.6 mA per amplifier

Low harmonic distortion

Low input voltage noise: 3.6 nV/√Hz

±0.5 mV typical input offset voltage

Externally adjustable gain

Can be used with fractional differential gains

Differential-to-differential or single-ended-to-differential

Adjustable output common-mode voltage

Wide supply range: +3 V to ±5 V

Available in 16-lead and 24-lead LFCSP packages

APPLICATIONS

ADC drivers

Single-ended-to-differential converters

IF and baseband gain blocks

Differential buffers

Line drivers

GENERAL DESCRIPTION

The ADA4932-x is the next generation AD8132 with higher

performance, and lower noise and power consumption. It is an

ideal choice for driving high performance ADCs as a single-ended-

to-differential or differential-to-differential amplifier. The output

common-mode voltage is user adjustable by means of an internal

common-mode feedback loop, allowing the ADA4932-x output

to match the input of the ADC. The internal feedback loop also

provides exceptional output balance as well as suppression of

even-order harmonic distortion products.

With the ADA4932-x, differential gain configurations are easily

realized with a simple external four-resistor feedback network that

determines the closed-loop gain of the amplifier.

The ADA4932-x is fabricated using the Analog Devices, Inc.,

proprietary silicon-germanium (SiGe) complementary bipolar

process, enabling it to achieve low levels of distortion and noise

at low power consumption. The low offset and excellent dynamic

performance of the ADA4932-x make it well suited for a wide

variety of data acquisition and signal processing applications.

Rev. 0

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 registered trademarks are the property of their respective owners.

−3 dB bandwidth of 560 MHz, G = 1

0.1 dB gain flatness to 300 MHz

Slew rate: 2800 V/µs, 25% to 75%

Fast 0.1% settling time of 9 ns

100 dB SFDR @ 10 MHz

90 dB SFDR @ 20 MHz

operation

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

Tel: 781.329.4700

Fax: 781.461.3113

The ADA4932-x is available in a Pb-free, 3 mm × 3 mm 16-lead

LFCSP (ADA4932-1, single) or a Pb-free, 4 mm × 4 mm 24-lead

LFCSP (ADA4932-2, dual). The pinout has been optimized to

facilitate PCB layout and minimize distortion. The ADA4932-1

and the ADA4932-2 are specified to operate over the −40°C to

+105°C temperature range; both operate on supplies between

+3 V and ±5 V.

–100

–110

–120

–130

–140

Figure 3. Harmonic Distortion vs. Frequency at Various Gains

–40

–50

–60

–70

–80

–90

100k

FUNCTIONAL BLOCK DIAGRAMS

ADA4932-1/ADA4932-2

Differential ADC Driver

+FB1

–FB2

OUT, dm

–IN1

+IN2

–FB

+FB

+IN

–IN

HD2, G = 1

HD3, G = 1

HD2, G = 2

HD3, G = 2

= 2V p-p

Figure 1. ADA4932-1

Figure 2. ADA4932-2

ADA4932-1

ADA4932-2

FREQUENCY (Hz)

12 PD

11 –OUT

10 +OUT

9 V

18 +OUT1

17 V

16 –V

15 –V

14 PD2

13 –OUT2

10M

Low Power

OCM

OCM1

www.analog.com

100M

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