TSM6025AEUR [SILICON]

A 2.5V, Low-Power/Low-Dropout Precision Voltage Reference;


型号：	TSM6025AEUR
厂家：	SILICON
描述：	A 2.5V, Low-Power/Low-Dropout Precision Voltage Reference
文件：	总10页 (文件大小：1219K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TSM6025

A +2.5V, Low-Power/Low-Dropout Precision Voltage Reference

FEATURES

DESCRIPTION



Alternate Source for MAX6025

Initial Accuracy:

The TSM6025 is a 3-terminal, series-mode 2.5-V

precision voltage reference and is a pin-for-pin,

alternate source for the MAX6025 voltage reference.

Like the MAX6025, the TSM6025 consumes only

27μA of supply current at no-load, exhibits an initial

output voltage accuracy of less than 0.2%, and a low

output voltage temperature coefficient of 15ppm/°C.

In addition, the TSM6025’s output stage is stable for

all capacitive loads to 2200pF and is capable of

sinking and sourcing load currents up to 500μA.

0.2% (max) – TSM6025A

0.4% (max) – TSM6025B



Temperature Coefficient:

15ppm/°C (max) – TSM6025A

25ppm/°C (max) – TSM6025B

Quiescent Supply Current: 35μA (max)

Low Supply Current Change with V_IN: <1μA/V

Output Source/Sink Current: ±500μA

Low Dropout at 500μA Load Current: 100mV

Load Regulation: 0.14μV/μA

Line Regulation : 25μV/V



Since the TSM6025 is a series-mode voltage

reference, its supply current is not affected by

changes in the applied supply voltage unlike two-

terminal shunt-mode references that require an

external resistor. The TSM6025’s small form factor

and low supply current operation combine to make it

an ideal choice in low-power, precision applications.

Stable with C_LOADup to 2200pF

APPLICATIONS

Industrial and Process-Control Systems

Hard-Disk Drives

Battery-Operated Equipment

Data Acquisition Systems

Hand-Held Equipment

The TSM6025 is fully specified over the -40°C to

+85°C temperature range and is available in a 3-pin

SOT23 package.

Precision 3V/5V Systems

Smart Industrial Transmitters

TYPICAL APPLICATION CIRCUIT

Output Voltage Temperature Drift

2.5035

THREE TYPICAL DEVICES

2.5025

DEVICE #1

2.5015

DEVICE #2

2.5005

2.4995

DEVICE #3

2.4985

-40

-15

TEMPERATURE DRIFT- °C

Page 1

TSM6025

ABSOLUTE MAXIMUM RATINGS

IN to GND.................................................................-0.3V to +13.5V

OUT to GND.................................................................... -0.3V to 7V

Short Circuit to GND or IN (V_IN< 6V)..............................Continuous

Output Short Circuit to GND or IN (V_IN≥ 6V) .............................. 60s

Continuous Power Dissipation (T_A= +70°C)

Operating Temperature Range................................. -40°C to +85°C

Storage Temperature Range.................................. -65°C to +150°C

Lead Temperature (Soldering, 10s)...................................... +300°C

3-Pin SOT23 (Derate at 4.0mW/°C above +70°C)..........320mW

Electrical and thermal stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These

are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections

of the specifications is not implied. Exposure to any absolute maximum rating conditions for extended periods may affect device reliability and

lifetime.

PACKAGE/ORDERING INFORMATION

PART

MARKING

ORDER NUMBER

TSM6025AEUR+

TSM6025AEUR+T

TSM6025BEUR+

TSM6025BEUR+T

CARRIER QUANTITY

Tape

-----

& Reel

ACX

Tape

3000

& Reel

Tape

-----

& Reel

ACY

Tape

3000

& Reel

Lead-free Program: Silicon Labs supplies only lead-free packaging.

Consult Silicon Labs for products specified with wider operating temperature ranges.

Page 2

TSM6025 Rev. 1.0

TSM6025

ELECTRICAL CHARACTERISTICS

V_IN= +5V, I_OUT= 0, T_A= T_MINto T_MAX, unless otherwise noted. Typical values are at T_A= +25°C. See Note 1.

PARAMETER

OUTPUT

SYMBOL CONDITIONS

MIN

TYP

2.500

MAX

UNITS

2.495

-0.20

2.490

-0.40

2.505

0.20

2.510

0.40

TSM6025A

TSM6025B

TSM6025A

TSM6025B

Output Voltage

V_OUT

T_A= +25°C

T_A= 0°C to +70°C

T_A= -40°C to +85°C

T_A= 0°C to +70°C

T_A= -40°C to +85°C

Output Voltage Temperature

Coefficient (See Note 2)

V_OUT

ppm/°C

∆V_OUT

∆V_IN

∆V_OUT

∆I_OUT

Line Regulation

(V_OUT+ 0.2V) ≤ V_IN≤ 12.6V

140

μV/V

Sourcing: 0 ≤ I_OUT≤ 500μA

Sinking: -500μA ≤ I_OUT≤ 0

0.14

0.18

0.60

0.80

Load Regulation

μV/μA

Dropout Voltage (See Note 5)

OUT Short-Circuit Current

V_IN-V_OUTI_OUT= 500μA

100

200

V_OUTShort to GND

V_OUTShort to IN

I_SC

Temperature Hysteresis

(See Note 3)

130

ppm

∆V_OUT

time

ppm/

1000hr

Long-Term Stability

DYNAMIC

1000hr at T_A= +25°C

f = 0.1Hz to 10Hz

f = 10Hz to 10kHz

125

μV_P-P

μV_RMS

Noise Voltage

e_OUT

∆V_OUT

∆V_IN

C_OUT

Ripple Rejection

_IN= 5V ±100mV, f = 120Hz

Capacitive-Load Stability Range

INPUT

See Note 4

2.2

Supply Voltage Range

Quiescent Supply Current

Change in Supply Current

V_IN

I_IN

I_IN/V_IN

Guaranteed by line-regulation test

V_OUT+ 0.2

12.6

2.0

μA

μA/V

(V_OUT+ 0.2V) ≤ V_IN≤ 12.6V

Note 1: All devices are 100% production tested at T_A= +25°C and are guaranteed by characterization for T_A= T_MINto T_MAX, as specified.

Note 2: Temperature Coefficient is measured by the “box” method; i.e., the maximum ∆V_OUTis divided by the maximum ∆T.

Note 3: Temperature hysteresis is defined as the change in the +25°C output voltage before and after cycling the device from T_MINto T_MAX

Note 4: Not production tested; guaranteed by design.

Note 5: Dropout voltage is the minimum input voltage at which V_OUTchanges ≤0.2% from V_OUTat V_IN= 5.0V.

TSM6025 Rev. 1.0

Page 3

TSM6025

TYPICAL PERFORMANCE CHARACTERISTICS

V_IN= +5V; I_OUT= 0mA; T_A= +25°C, unless otherwise noted.

Output Voltage Temperature Drift

Long-Term Output Voltage Drift

2.5035

2.502

2.501

2.500

2.499

2.498

THREE TYPICAL DEVICES

DEVICE A

THREE TYPICAL DEVICES

2.5025

2.5015

2.5005

2.4995

2.4985

DEVICE #1

DEVICE #2

DEVICE B

DEVICE C

DEVICE #3

250

500

750

1000

-40

-15

TIME - Hours

TEMPERATURE DRIFT- °C

Line Regulation – ΔV_OUT/ΔV_IN

Dropout Voltage vs Source Current

300

200

100

0.4

0.3

0.2

0.1

T_A= -40°C

T_A= +25°C

T_A= +85°C

T_A= +25°C

T_A= +85°C

T_A= -40°C

-100

1000

200

400

600

800

SUPPLY VOLTAGE - Volt

SOURCE CURRENT- µA

Load Regulation – ΔV_OUT/ΔI_LOAD

Power Supply Rejection vs Frequency

0.4

0.2

100

V_CC=+5.5V±0.25V

T_A= -40°C

T_A= +85°C

T_A= +25°C

-0.2

0.1

-0.4

0.01

-500

-250

250

500

100

10k

100k

LOAD CURRENT- µA

FREQUENCY - Hz

Page 4

TSM6025 Rev. 1.0

TSM6025

TYPICAL PERFORMANCE CHARACTERISTICS

V_IN= +5V; I_OUT= 0mA; T_A= +25°C, unless otherwise noted.

Supply Current vs Input Voltage

Supply Current vs Temperature

V_CC=+12.5V

V_CC=+7.5V

V_CC= +2.5V, +5.5V

TEMPERATURE - °C

-40

-15

INPUT VOLTAGE - Volt

Output Impedance vs Frequency

0.1Hz to 10Hz Output Noise

10k

100

46µVpp

0.1

100

10k

0.1

FREQUENCY - Hz

1s/DIV

Power-On Transient Response

Small-signal Load Transient Response

I_OUT= 0µA → 50µA → 0µA

200µs/DIV

10µs/DIV

TSM6025 Rev. 1.0

Page 5

TSM6025

TYPICAL PERFORMANCE CHARACTERISTICS

V_IN= +5V; I_OUT= 0mA; T_A= +25°C, unless otherwise noted.

Large-signal Load Transient Response

Line Transient Response

I_OUT= 0mA → 1mA → 0mA

V_IN=5V±0.25V, AC-Coupled

10µs/DIV

2µs/DIV

Page 6

TSM6025 Rev. 1.0

TSM6025

PIN FUNCTIONS

NAME FUNCTION

Supply Voltage Input

OUT

GND

+2.5V Output

Ground

DESCRIPTION/THEORY OF OPERATION

The TSM6025 incorporates a precision 1.25-V

bandgap reference that is followed by a output

amplifier configured to amplify the base bandgap

output voltage to a 2.5-V output. The design of the

bandgap reference incorporates proprietary circuit

design techniques to achieve its low temperature

coefficient of 15ppm/°C and initial output voltage

accuracy less than 0.2%. The design of the output

amplifier’s frequency compensation does not require

a separate compensation capacitor and is stable

with capacitive loads up to 2200pF. The design of

the output amplifier also incorporates low headroom

design as it can source and sink load currents to

500μA with a dropout voltage less than 200mV.

APPLICATIONS INFORMATION

Power Supply Input Capacitive Bypass

than 1μA/V. Since the TSM6025 is a series-mode

reference, load current is drawn from the supply

voltage only when required. In this case, circuit

efficiency is maintained at all applied supply

voltages. Reducing power dissipation and extending

battery life are the net benefits of improved circuit

efficiency.

As shown in the Typical Application Circuit, the V_IN

pin of the TSM6025 should be bypassed to GND

with a 0.1uF ceramic capacitor for optimal line-

transient performance. Consistent with good analog

circuit engineering practice, the capacitor should be

placed in as close proximity to the TSM6025 as

practical with very short pcb track lengths.

On the other hand, an external resistor in series with

the supply voltage is required by two-terminal,

shunt-mode references. In this case, as the supply

voltage changes, so does the quiescent supply

current of the shunt reference. In addition, the

external resistor’s tolerance and temperature

coefficient contribute two additional factors that can

affect the circuit’s supply current. Therefore,

maximizing circuit efficiency with shunt-mode

references becomes an exercise involving three

variables. Additionally, shunt-mode references must

be biased at the maximum expected load current

even if the load current is not present at all times.

Output/Load Capacitance Considerations

As mentioned previously, the TSM6025 does not

require a separate, external capacitor at V_OUTfor

transient response stability as it is stable for

capacitive loads up to 2200pF. On the other hand

and for improved large-signal line and load

regulation, the use of a capacitor at V_OUTwill provide

a reservoir of charge in reserve to absorb large-

signal load or line transients. This in turn improves

the TSM6025’s V_OUTsettling time. If large load and

line transients are not expected in the application,

then the TSM6025 can be used without an external

capacitor at V_OUTthereby reducing the overall circuit

footprint.

When the applied supply voltage is less than the

minimum specified input voltage of the TSM6025 (for

example, during the power-up transition), the

TSM6025 can draw up to 200μA above its nominal,

steady-state supply current. To ensure reliable

power-up behavior, the input power source must

have sufficient reserve power to provide the extra

supply current drawn during the power-up transition.

Supply Current

The TSM6025 exhibits excellent dc line regulation

as its supply current changes slightly as the applied

supply voltage is increased. While its supply current

is 35μA maximum, the change in its supply current

as a function of supply voltage (its ∆I_IN/∆V_IN) is less

TSM6025 Rev. 1.0

Page 7

TSM6025

Output Voltage Hysteresis

combined turn-on and settling time to within 0.1% of

its 2.5V final value is approximately 340μs.

Reference output voltage thermal hysteresis is the

change in the reference’s +25°C output voltage after

temperature cycling from +85°C to +25°C and from -

40°C to +25°C. Thermal hysteresis is caused by

differential package stress impressed upon the

TSM6025’s internal bandgap core transistors and

depends on whether the reference IC was previously

at a higher or lower temperature. At 130ppm, the

TSM6025’s typical temperature hysteresis is equal

to 0.33mV with respect to a 2.5V output voltage.

A Positive and Negative Low-Power Voltage

Reference

The circuit in Figure 1 uses a CD4049 hex inverter

and a few external capacitors as the power supply to

a dual-supply precision op amp to form a ±2.5V

precision, bipolar output voltage reference around

the TSM6025. The CD4049-based circuit is a

discrete charge pump voltage doubler/inverter that

generates ±6V supplies for any industry-standard

OP-07 or equivalent precision op amp.

Voltage Reference Turn-On Time

With a (V_IN– V_OUT) voltage differential larger than

200mV and I_LOAD= 0mA, the TSM6025’s typical

Figure 1: Positive and Negative 2.5V References from a Single +3V or +5V Supply

Page 8

TSM6025 Rev. 1.0

TSM6025

PACKAGE OUTLINE DRAWING

3-Pin SOT23 Package Outline Drawing

(N.B., Drawings are not to scale)

Patent Notice

Silicon Labs invests in research and development to help our customers differentiate in the market with innovative low-power, small size,

analog-intensive mixed-signal solutions. Silicon Labs' extensive patent portfolio is a testament to our unique approach and world-class

engineering team.

The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.

Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the

use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or

parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty,

representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any

liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation

consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended

to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where

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Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.

Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.

Silicon Laboratories, Inc.

Page 9

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TSM6025 Rev. 1.0

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TSM6025AEUR [SILICON]

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