intersil ISL21007 DATA SHEET

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ISL21007

Data Sheet April 12, 2007

Precision, Low Noise FGA™ Voltage
References

The ISL21007 FGA™ voltage references are extremely low
power, high precision, and low noise voltage references
fabricated on Intersil’s proprietary Floating Gate Analog
technology. The ISL21007 features very low noise (4µV

P-P

for 0.1Hz to 10Hz) and very low operating current (150µA,
Max). In addition, the ISL21007 family features guaranteed
initial accuracy as low as ±0.5mV.

This combination of high initial accuracy, low drift, and low
output noise performance of the ISL21007 enables versatile
high performance control and data acquisition applications
with low power consumption.

Available Options

ACCURACY

INITIAL

(mV)

TEMPCO.

(ppm/°C)

V

OUT

OPTION

PART NUMBER

ISL21007BFB812Z 1.250 ±0.5 3
ISL21007CFB812Z 1.250 ±1.0 5
ISL21007DFB812Z 1.250 ±2.0 10
ISL21007BFB825Z 2.500 ±0.5 3
ISL21007CFB825Z 2.500 ±1.0 5
ISL21007DFB825Z 2.500 ±2.0 10

(V)

FN6326.1

Features

• Reference Output Voltage . . . . . . . . . . . . . . .1.25V, 2.50V

• Initial Accuracy. . . . . . . . . . . . . . . . . . . .±0.5mV (B grade)

• Input Voltage Range: . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V

• Low Output Voltage Noise . . . . . . 4µV

(0.1Hz to 10Hz)

P-P

• Supply Current. . . . . . . . . . . . . . . . . . . . . . . .150µA (Max)

• Temperature Coefficient. . . . . . . . . . . .3ppm/°C (B grade)

• Operating Temperature Range. . . . . . . . .-40°C to +125°C

• Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ld SOIC

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• High Resolution A/Ds and D/As

• Digital Meters

• Bar Code Scanners

• Basestations

• Battery Management/Monitoring

• Industrial/Instrumentation Equipment

Pinout

GND or NC

VIN
DNC
GND

ISL21007

(8 LD SOIC)

TOP VIEW

1
2
3
4

8

DNC

7

DNC

6

VOUT

5

TRIM

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Copyright Intersil Americas Inc. 2007. All Rights Reserved

Ordering Information

ISL21007

PART NUMBER

(Note) PART MARKING

ISL21007BFB812Z 21007BF Z12 1.250 ±0.5mV, 3ppm/°C -40 to +125 8 Ld SOIC M8.15
ISL21007CFB812Z 21007CF Z12 1.250 ±1.0mV, 5ppm/°C -40 to +125 8 Ld SOIC M8.15
ISL21007DFB812Z 21007DF Z12 1.250 ±2.0mV, 10ppm/°C -40 to +125 8 Ld SOIC M8.15
ISL21007BFB825Z 21007BF Z25 2.500 ±0.5mV, 3ppm/°C -40 to +125 8 Ld SOIC M8.15
ISL21007CFB825Z 21007CF Z25 2.500 ±1.0mV, 5ppm/°C -40 to +125 8 Ld SOIC M8.15
ISL21007DFB825Z 21007DF Z25 2.500 ±2.0mV, 10ppm/°C -40 to +125 8 Ld SOIC M8.15

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

*Add “-TK” suffix for tape and reel

V

OPTION

OUT

(V) GRADE

TEMP. RANGE

(°C)

PACKAGE

(Pb-Free) PKG. DWG. #

2

FN6326.1

April 12, 2007

Pin Descriptions

PIN NUMBER PIN NAME DESCRIPTION

1 GND or NC Ground Connection
2 VIN Power Supply Input Connection
4 GND Voltage Reference Output Connection
5 TRIM Allows user trim ±2.5%
6 VOUT Do Not Connect; Internal Connection – Must Be Left Floating

3, 7, 8 DNC Do Not Connect; Internal Connection - Must Be Left Floating

Typical Application Circuit

ISL21007

SPI BUS

1

+3V

C1
10µF

X79000

1

SCK

2

A0

3

A1

4

A2

5

SI

6

SO

7

/RDY

8

UP

9

DOWN

10

OE

/CS
CLR
VCC

VH

VL

VREF

VSS

VOUT
VBUF

VFB

20
19
18
17
16
15
14
13
12
11

LOW NOISE DAC OUTPUT

GND

2

VIN

3

NC

4

GND

ISL21007-12, 25

FIGURE 1. TYPICAL APPLICATION PRECISION 12-BIT SUBRANGING DAC

NC
NC

VOUT

NC

8
7

6
5

C1

0.001µF

3

FN6326.1

April 12, 2007

ISL21007

Absolute Voltage Ratings Thermal Information

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

Max Voltage V
Max Voltage V

to Gnd. . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6.5V

IN

to Gnd (10s). . . . . . . . . . . . . . .-0.5V to V

OUT

OUT

+ 1

Voltage on “DNC” pins. . . . No connections permitted to these pins.

Lead Temperature, soldering (10s) . . . . . . . . . . . . . . . . . . . .+260°C

ESD Rating

Human Body Model (HBM) . . . . . . . . . . . . . . . . . . . . . . . . . . .6kV

Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .600V

Charged Device Model (CDM). . . . . . . . . . . . . . . . . . . . . . . . .2kV

Recommended Operating Conditions

Temperature Range (Industrial). . . . . . . . . . . . . . . .-40°C to +125°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

IMPORT ANT NOTE: A ll p arameters having Min/Max specificati ons are gua ranteed. Typ values are for informati on purposes only. Unless otherwise noted, all test s are at
the specified temperature and are pulsed tests, theref ore: T

NOTE:

is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

1. θ

JA

= TC = T

J

A

Continuous Power Dissipation (T

8 Lead SOIC derate 5.88mW/°C above +70°C . . . . . . 471mW

= +70°C) (Note 1)

A

Pb-free reflow profile. . . . . . . . . . . . . . . . . . . . . . . . . . see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

Common Electrical Specifications (ISL21007-12 , -25)T

= -40°C to +125°C, unless otherwise specified.

A

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

V

IN

V

OA

Input Voltage Range 2.7 5.5 V
V

Accuracy @ TA = +25°C ISL21007B -0.5 +0.5 mV

OUT

ISL21007C -1.0 +1.0 mV
ISL21007D -2.0 +2.0 mV

TC V

OUT

Output Voltage Temperature
Coefficient (Note 2)

ISL21007B 3 ppm/°C
ISL21007C 5 ppm/°C
ISL21007D 10 ppm/°C

I

IN

ΔV

/Δt Long Term Stability (Note 4) TA = +25°C TBD ppm/√1kHr s

OUT

Supply Current 75 150 µA

Trim Range ±2.0 ±2.5 %
t

R

Turn on Settling Time V

= ±0.1% 120 µs

OUT

Ripple Rejection f = 10kHz 60 dB
e

N

V

N

Output Voltage Noise 0.1Hz ≤ f ≤ 10Hz 4 µV
Broadband Voltage Noise 10Hz ≤ f ≤ 1kHz 2.2 µV

RMS

Noise Density f = 1kHz 60 nV/√Hz

Electrical Specifications (ISL21007-12, V

= 1.250V) V

OUT

= 3.0V, TA = -40°C to +125°C, unless otherwise specified.

IN

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

V

ΔV
ΔV

I

SC

ΔV

OUT

OUT

OUT

OUT

/ΔV
/ΔI

/ΔT

OUT

A

Output Voltage 1.250 V
Line Regulation 2.7V < VIN < 5.5V 100 700 µV/V

IN

Load Regulation Sourcing: 0mA ≤ I

Sinking: -7mA ≤ I

Short Circuit Current TA = +25°C, V

≤ 7mA 10 100 µV/mA

OUT

≤ 0mA 20 150 µV/mA

OUT

tied to GND 40 mA

OUT

Thermal Hysteresis (Note 3) ΔTA = +165°C 50 ppm

P-P

4

FN6326.1

April 12, 2007

ISL21007

Electrical Specifications (ISL21007-25, V

= 2.50V) V

OUT

= 3.0V, TA = -40°C to +125°C, unless otherwise specified

IN

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

V

ΔV
ΔV

I

SC

ΔV

OUT

OUT
OUT

OUT

/ΔV
/ΔI

/ΔT

OUT

Output Voltage 2.500 V
Line Regulation 2.7V < VIN < 5.5V 50 200 µV/V

IN

Load Regulation Sourcing: 0mA ≤ I

Sinking: -5mA ≤ I
Short Circuit Current TA = +25°C, V
Thermal Hysteresis (Note 3) ΔTA = +165°C 50 ppm

A

≤ 5mA 10 100 µV/mA

OUT

≤ 0mA 20 150 µV/mA

OUT

tied to GND 50 mA

OUT

NOTES:

2. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in V

is divided by the

OUT

temperature range; in this case, -40°C to +125°C = +165°C.

3. Thermal Hysteresis is the change of V
at T

= +25°C for the device under test. The device is temperature cycled and a second V

A

between the initial V
from +25°C to +125°C to -40°C to +25°C.

reading and the second V

OUT

measured @ TA = +25°C after temperature cycling over a specified range, ΔTA. V

OUT

reading is then expressed in ppm. For Δ TA = +165°C, the device under test is cycled

OUT

measurement is taken at +25°C. The difference

OUT

is read initially

OUT

4. FGA voltage reference long term drift is a logarithmic characteristic. Changes that occur after the first few hundred hours of operation are
significantly smaller with time, asymptotically approaching zero beyond 1,000 hours. Because of this decreasing characteristics, long term drift
is specified in ppm/√1kHrs.

Typical Performance Curves (ISL21007-12) (R

120

100

80

60

(µA)

IN

I

40

20

0

2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

FIGURE 2. IIN vs VIN (3 UNITS)

UNIT 3

V

IN

UNIT 1

UNIT 2

(V)

= 100kΩ)

EXT

95
90

+125°C

85
80
75

(µA)

IN

I

70
65
60

2.5 3.0 3.5 4.0 4.5 5.0 5.5

FIGURE 3. I

+25°C

-40°C

V

(V)

IN

vs VIN OVER TEMPERATURE

IN

(V)

OUT

V

1.25015

= 3.0V)

1.25010

IN

1.25005

1.25000

1.24995

1.24990

1.24985

1.24980

(NORMALIZED TO 1.25V A T V

UNIT 3

UNIT 1

2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)

FIGURE 4. LINE REGULATION (3 UNITS)

5

UNIT 2

150
100

+125°C

50

= 3.0V)

0

IN

-50

-100

(µV)

O

-150

ΔV

-200

-250

(NORMALIZED TO V

-300

2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

+25°C

V

-40°C

(V)

IN

FIGURE 5. LINE REGULATION OVER TEMPERATURE

FN6326.1

April 12, 2007