LTC6915 datasheet, PDF - EEWORLD Datasheet

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LTC6915: DescriptionZero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain; File Size282KB，16 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC6915 Overview

Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain

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LTC6915

Zero Drift, Precision

Instrumentation Amplifier with

Digitally Programmable Gain

FEATURES

DESCRIPTIO

14 Levels of Programmable Gain

125dB CMRR Independent of Gain

Gain Accuracy 0.1% (Typ)

Maximum Offset Voltage of 10µV

Maximum Offset Voltage Drift: 50nV/°C

Rail-to-Rail Input and Output

Parallel or Serial (SPI) Interface for Gain Setting

Supply Operation: 2.7V to

±5.5V

Typical Noise: 2.5µV

P-P

(0.01Hz to 10Hz)

16-Lead SSOP and 12-Lead DFN Packages

The LTC

6915 is a precision programmable gain instru-

mentation amplifier. The gain can be programmed to 0, 1,

2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096

through a parallel or serial interface. The CMRR is typically

125dB with a dual 5V supply with any programmed gain.

The offset is below 10µV with a temperature drift of less

than 50nV/°C.

The LTC6915 uses charge balanced sampled data tech-

niques to convert a differential input voltage into a single

ended signal that is in turn amplified by a zero-drift

operational amplifier.

The differential inputs operate from rail-to-rail and the

single-ended output swings from rail-to-rail. The LTC6915

can be used in single power supply applications as low as

2.7V, or with dual

±5V

supplies. The LTC6915 is available

in a 16-lead SSOP package and a 12-lead DFN surface

mount package.

, LTC and LT are registered trademarks of Linear Technology Corporation.

APPLICATIO S

Thermocouple Amplifiers

Electronic Scales

Medical Instrumentation

Strain Gauge Amplifier

High Resolution Data Acquisition

TYPICAL APPLICATIO

Differential Bridge Amplifier with Gain Programmed through the Serial Interface

LTC6915 SSOP PACKAGE

3 IN

2 IN

R < 10k

RESISTOR

ARRAY

REF 13

11 PARALLEL_SERIAL

4-BIT

LATCH

HOLD_THRU 5

0.1µF

Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7

8-BIT

SHIFT-REGISTER

SHDN

DGND

–

6915 TA01

OUT 15

–

MUX

6 CS(D0)

7 D

(D1)

8 CLK(D2)

9 D

OUT

(D3)

µP

TO OTHER

DEVICES

SENSE 14

6915f

LTC6915 Related Products

	LTC6915	LTC6915CDE	LTC6915CGN	LTC6915HGN	LTC6915IGN	LTC6915IDE
Description	Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain	Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain	Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain	Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain	Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain	Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain
Brand Name	-	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	-	incompatible	incompatible	incompatible	incompatible	incompatible
Maker	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
Parts packaging code	-	DFN	SSOP	SSOP	SSOP	DFN
package instruction	-	HVSSON, SOLCC12,.12,20	SSOP, SSOP16,.25	SSOP, SSOP16,.25	SSOP, SSOP16,.25	HVSSON, SOLCC12,.12,20
Contacts	-	12	16	16	16	12
Manufacturer packaging code	-	DE/UE	GN	GN	GN	DE/UE
Reach Compliance Code	-	not_compliant	_compli	not_compliant	not_compliant	not_compliant
ECCN code	-	EAR99	EAR99	EAR99	EAR99	EAR99
Amplifier type	-	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER
Maximum average bias current (IIB)	-	0.01 µA	0.01 µA	0.01 µA	0.01 µA	0.01 µA
Nominal bandwidth (3dB)	-	0.2 MHz	0.2 MHz	0.2 MHz	0.2 MHz	0.2 MHz
Minimum Common Mode Rejection Ratio	-	85 dB	85 dB	85 dB	85 dB	85 dB
Maximum input offset current (IIO)	-	0.003 µA	0.003 µA	0.003 µA	0.003 µA	0.003 µA
Maximum input offset voltage	-	10 µV	10 µV	10 µV	10 µV	10 µV
JESD-30 code	-	R-PDSO-N12	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-N12
JESD-609 code	-	e0	e0	e0	e0	e0
length	-	4 mm	4.8895 mm	4.8895 mm	4.8895 mm	4 mm
Humidity sensitivity level	-	1	1	1	1	1
maximum nonlinearity	-	0.0015%	0.0015%	0.0015%	0.0015%	0.0015%
Number of functions	-	1	1	1	1	1
Number of terminals	-	12	16	16	16	12
Maximum operating temperature	-	70 °C	70 °C	125 °C	85 °C	85 °C
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	HVSSON	SSOP	SSOP	SSOP	HVSSON
Encapsulate equivalent code	-	SOLCC12,.12,20	SSOP16,.25	SSOP16,.25	SSOP16,.25	SOLCC12,.12,20
Package shape	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	235	235	235	235	235
power supply	-	2.7/+-5 V	2.7/+-5 V	2.7/+-5 V	2.7/+-5 V	2.7/+-5 V
Certification status	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	0.85 mm	1.727 mm	1.727 mm	1.727 mm	0.85 mm
Nominal slew rate	-	0.2 V/us	0.2 V/us	0.2 V/us	0.2 V/us	0.2 V/us
Supply voltage upper limit	-	11 V	11 V	11 V	11 V	11 V
Nominal supply voltage (Vsup)	-	3 V	3 V	3 V	3 V	3 V
surface mount	-	YES	YES	YES	YES	YES
technology	-	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	-	COMMERCIAL	COMMERCIAL	AUTOMOTIVE	INDUSTRIAL	INDUSTRIAL
Terminal surface	-	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)
Terminal form	-	NO LEAD	GULL WING	GULL WING	GULL WING	NO LEAD
Terminal pitch	-	0.5 mm	0.635 mm	0.635 mm	0.635 mm	0.5 mm
Terminal location	-	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	20	20	20	20	20
width	-	3 mm	3.899 mm	3.899 mm	3.899 mm	3 mm

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