LTC6652AHMS8-2.048-PBF datasheet(9/16 Pages) LINER

Part #	LTC6652AHMS8-2.048-PBF

Description	Precision Low Drift Low Noise Buffered Reference

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Manufacturer	LINER [Linear Technology]

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LTC6652

9

6652fb

Bypass and Load Capacitors

The LTC6652 voltage references do not require an input

capacitor, but a 0.1μF capacitor located close to the part

improves power supply rejection.

The LTC6652 voltage references are stable with or without

a capacitive load. For applications where an output capaci-

tor is beneﬁcial, a value of 0.1μF to 10μF is recommended

depending on load conditions. The Typical Performance

Characteristics section includes a plot illustrating a region

of marginal stability. Either no or low value capacitors for

any load current are acceptable. For loads that sink current

or light loads that source current, a 0.1μF to 10μF capacitor

has stable operation. For heavier loads that source current

a 0.5μF to 10μF capacitor range is recommended.

The transient response for a 0.5V step on VIN with and

without an output capacitor is shown in Figures 2 and 3,

respectively.

The LTC6652 references with an output of 2.5V and above

are guaranteed to source and sink 5mA. The 1.25V and

2.048V versions are guaranteed to source 5mA and sink

1mA. The test circuit for transient load step response is

shown in Figure 1. Figures 4 and 5 show a 5mA source

and sink load step response without a load capacitor,

respectively.

Start-Up

The start-up characteristic of the LTC6652 is shown in

Figures 8 and 9. Note that the turn-on time is affected by

the value of the output capacitor.

BLOCK DIAGRAM

APPLICATIONS INFORMATION

VIN

SHDN

GND

VOUT

6652 BD

BANDGAP

3

6

2

4

–

+

Figure 1. Transient Load Test Circuit

VIN

3V

2, 3

6

100Ω

4, 5, 7, 8

CIN

0.1μF

COUT

1μF

VGEN

0.5V

6652 F01

LTC6652-2.5

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