ISL28256FAZ-T7 datasheet(10/14 Pages) INTERSIL

tên linh kiện	ISL28256FAZ-T7

Giải thích chi tiết về linh kiện	39uA Micropower Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps

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10 / 14 page

10

FN6154.2

February 27, 2007

Applications Information

Introduction

The ISL28156 is a single BiMOS rail-to-rail input, output

(RRIO) operational amplifier with an enable feature. The

ISL28256 is a dual version without the enable feature. Both

devices are designed to operate from single supply (2.4V to

5.0V) or dual supplies (±1.2V to ±2.5V) while drawing only

39

μA of supply current per amplifier. This combination of low

power and precision performance makes this device suitable

for a variety of low power applications including battery

powered systems.

Rail-to-Rail Input/Output

These devices feature bipolar inputs which have an input

common mode range that extends up to 0.5V beyond the v+

rail, and to within 10mV of the V- rail. The CMOS outputs

typically swing to within about 4mV of the supply rails with a

100k

Ω load. The NMOS sinks current to swing the output in

the negative direction. The PMOS sources current to swing the

output in the positive direction.

Input Protection

All input terminals have internal ESD protection diodes to both

positive and negative supply rails, limiting the input voltage to

within one diode beyond the supply rails. They also contain

back-to-back diodes across the input terminals. For

applications where the input differential voltage is expected to

exceed 0.5V, external series resistors must be used to ensure

the input currents never exceed 5mA (Figure 35).

Enable/Disable Feature

The ISL28156 offers an EN pin that disables the device

when pulled up to at least 2.0V. In the disabled state (output

in a high impedance state), the part consumes typically

10µA. By disabling the part, multiple ISL28156 parts can be

connected together as a MUX. In this configuration, the

outputs are tied together in parallel and a channel can be

selected by the EN pin. The EN pin also has an internal pull

down. If left open, the EN pin will pull to the negative rail and

the device will be enabled by default.

Pin Descriptions

ISL28156

(6 Ld SOT-23)

ISL28156

(8 Ld SO)

ISL28256

(8 Ld MSOP)

PIN NAME

FUNCTION

EQUIVALENT CIRCUIT

1, 5

NC

Not connected

42

2 (A)

6 (B)

IN-

Inverting input

Circuit 1

33

3 (A)

5 (B)

IN+

Non-inverting

input

(See circuit 1)

2

4

V-

Negative supply

16

1 (A)

7 (B)

OUT

Output

Circuit 2

6

7

8

V+

Positive supply

5

8

ENABLE

Chip enable

Circuit 3

IN-

V+

V-

IN+

V+

V-

OUT

V+

V-

CE

FIGURE 35. INPUT CURRENT LIMITING

-

+

RIN

RL

VIN

VOUT

ISL28156, ISL28256

Số phần tương tự - ISL28256FAZ-T7

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Intersil Corporation	ISL28256FBZ	820Kb / 13P	39關A Micropower Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps
	ISL28256FBZ	826Kb / 13P	Low Input Bias Current Op Amps
	ISL28256FBZ-T7	820Kb / 13P	39關A Micropower Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps
	ISL28256FBZ-T7	826Kb / 13P	Low Input Bias Current Op Amps
	ISL28256FUZ	820Kb / 13P	39關A Micropower Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps

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