ADA4097-1BUJZ-R5 datasheet(24/27 Pages) AD

24 / 27 page

ADA4097-1

Data Sheet

Rev. 0 | Page 24 of 27

GROUNDING

Use ground and power planes where possible to reduce the

resistance and inductance of the supply and ground returns.

Place bypass capacitors as close as possible to the ±VS supply

pins, with the other ends connected to the ground plane. It is

recommended to use a bypass capacitor of at least 0.1 μF when

driving light loads (load currents < 100 μA), and more capacitance

when driving heavier loads. Routing from the output to the load

and return to the ground plane must have minimal loop area to

keep inductance to a minimum.

ESD PROTECTION WHEN POWERED

ICs react to ESD strikes differently when unpowered vs.

powered, which falls under IEC-61000-4-2 standards (see

the Absolute Maximum Ratings section). A device that

performs well under HBM conditions can perform poorly

under International Electrotechnical Commission (IEC)

conditions. The ADA4097-1 is thoroughly abused with ESD

strikes under IEC conditions to create a front-end circuit

protection scheme that protects the device if subjected to ESD

strikes. Figure 63 and Figure 64 show two different protection

schemes that extend the protection of the ADA4097-1 to ±8 kV

ESD strikes.

Consider the following when selecting components:



A component size of 0805 or larger to reduce chance of

arc-over.



Pulse withstanding, thick film resistors.



C0G MLCC with a minimum rating of 100 V.



Bidirectional, transient voltage suppression (TVS) diodes.

In the circuit shown in Figure 63, R1 is a 220 Ω, Panasonic,

0805, ERJ-P6 series, and C1 is a 100 pF, Yageo, 0805, 100 V,

C0G/NPO.

IN+

VIN

V+

1VOUT

4 VEE

VCC

V–

ADVANTAGES DISADVANTAGES

INEXPENSIVE

(~5 CENTS)

R1 INTRODUCES

THERMAL NOISE

SMALL

FOOTPRINT

RC NETWORK

LIMITS SPEED

MINIMAL

LEAKAGE

NEED TO CAREFULLY

CHARACTERIZE

CAPACITOR

NOT AS ROBUST

AGAINST REPEATED

STRIKES

GND

Figure 63. ESD Protection Circuit (RC Network)

In the circuit shown in Figure 64, R1 is a 220 Ω, Panasonic,

0805, ERJ-P6 series, and D1 is a Bourns CDSOD323-T36SC.

An ESD varistor can be considered for D1.

For more information on system level ESD considerations, see

the technical article, When Good Electrons Go Bad: How to

Protect Your Analog Front End, on the Analog Devices, Inc.,

website.

ADA4097-1BUJZ-R5 датащи(PDF) 24 Page - Analog Devices

ADA4097-1BUJZ-R5 датащи(HTML) 24 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

датащи скачать

ссылки URL