Datasheet

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LT1413

Single Supply Operation:

■

Input Goes Below Ground

■

Output Swings to Ground Sinking Current

■

No Pull-Down Resistors Needed

■

Phase Reversal Protection

At 5V, 0V Low Cost Grade Specifications:

■

280µV Max Offset Voltage

■

380µV Max in S8 Package

■

0.8nA Max Offset Current

■

480µA Max Supply Current per Amplifier

■

0.5µV/°C Drift

■

1.4 Million Voltage Gain

■

950kHz Gain-Bandwidth Product

■

0.55µV

P-P

, 0.1Hz to 10Hz Noise

The LT1413 is a low cost, upgraded version of Linear

Technology’s industry standard LT1013 dual, single sup-

ply op amp. The LT1413 is optimized for single 5V appli-

cations, although ±15V specifications are also provided

for completeness.

In the design of the LT1413, particular emphasis has been

placed on low cost plastic and SO-8 package performance:

60µV offset voltage, 0.1nA offset current, in excess of

10mA output current at 330µA supply current and 140dB

channel separation are some of the specifications achieved.

Other dual, single supply amplifiers are available to

complement the LT1413 family: the micropower LT1078’s

supply current is 10 times lower with a 4.5 fold speed

performance degradation compared to the LT1413. Con-

versely, the LT1211, LT1213 and LT1215 duals have 4 to

14 times higher supply current, but also 13 to 50 times

higher speed.

Protected by U.S. Patent 4,775,884.

ESCRIPTIO

Single Supply, Dual

Precision Op Amp

■

Single Supply Systems

■

Two and Three Op Amp Instrumentation Amplifiers

■

Active Filters

■

Battery-Powered Systems

■

Strain Gauge and Bridge Amplifiers

+90V, –3V Common-Mode Range

Difference Amplifier (A

= 1)

Distribution of Input Offset Voltage

(In Plastic DIP, N8 Package)

INPUT OFFSET VOLTAGE (µV)

–300

PERCENT OF UNITS

–200

–100 0 100

LT1413 • TA01

200 300

= 5V, 0V

= 25°C

LT1413 • TA03

10M

–

10M

1/2 LT1413

10M

OUTPUT

20mV TO 8V

INPUT

1.5mV

125µV)

11M

80kHz

OUTPUT OFFSET =

(INPUT REFERRED =

INPUT RESISTANCE =

BANDWIDTH =

(THE 0.1nA TYPICAL OFFSET CURRENT

PERMITS THE USE OF 1MΩ RESISTORS)

ITY

Summary of content (8 pages)

PAGE 1
LT1413 Single Supply, Dual Precision Op Amp U FEATURES DESCRIPTIO Single Supply Operation: ■ Input Goes Below Ground ■ Output Swings to Ground Sinking Current ■ No Pull-Down Resistors Needed ■ Phase Reversal Protection At 5V, 0V Low Cost Grade Specifications: ■ 280µV Max Offset Voltage ■ 380µV Max in S8 Package ■ 0.8nA Max Offset Current ■ 480µA Max Supply Current per Amplifier ■ 0.5µV/°C Drift ■ 1.4 Million Voltage Gain ■ 950kHz Gain-Bandwidth Product ■ 0.55µV P-P, 0.
PAGE 2
LT1413 W W W AXI U U ABSOLUTE RATI GS Supply Voltage ..................................................... ±22V Differential Input Voltage ...................................... ±30V Input Voltage .................................................................. Equal to Positive Supply Voltage 5V Below Negative Supply Voltage Output Short-Circuit Duration ......................... Indefinite Operating Temperature Range ............... – 40°C to 85°C Storage Temperature Range ................
PAGE 3
LT1413 ELECTRICAL CHARACTERISTICS SYMBOL SR GBW IS VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C, unless otherwise noted. PARAMETER CONDITIONS Maximum Output Voltage Swing Output Low, No Load Output Low, 600Ω to GND Output Low, ISINK = 1mA Output High, No Load Output High, 600Ω to GND AV = 1 fO ≤ 100kHz (Note 4) Slew Rate Gain-Bandwidth Product Supply Current per Amplifier Channel Separation Minimum Supply Voltage MIN 4.1 3.4 0.
PAGE 4
LT1413 ELECTRICAL CHARACTERISTICS VS = ±15V, TA = 25°C, unless otherwise noted. SYMBOL PARAMETER CONDITIONS (Note 1) VOS Input Offset Voltage LT1413N8 LT1413S8 IOS IB Input Offset Current Input Bias Current Input Voltage Range CMRR PSRR AVOL VOUT SR IS Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Slew Rate Supply Current per Amplifier MIN LT1413ACN8 TYP MAX 75 0.1 8 13.5 13.8 – 15.0 – 15.3 100 117 103 120 1500 5000 ±13 ±14 0.
PAGE 5
LT1413 U W TYPICAL PERFOR A CE CHARACTERISTICS Distribution of Input Offset Voltage (In S8 Package) Output Saturation vs Sink Current vs Temperature Supply Current vs Temperature 10 30 20 15 10 5 0 –400 –300 –200 –100 0 100 200 300 400 INPUT OFFSET VOLTAGE (µV) V + = 5V TO 30V V – = 0V 400 VS = ± 15V 350 ISINK = 10mA SATURATION VOLTAGE (V) PERCENT OF UNITS 25 SUPPLY CURRENT PER AMPLIFIER (µA) VS = 5V, 0V TA = 25°C VS = 5V, 0V 1 ISINK = 5mA ISINK = 1mA 0.
PAGE 6
LT1413 U W TYPICAL PERFOR A CE CHARACTERISTICS Voltage Gain vs Frequency Channel Separation vs Frequency Gain, Phase vs Frequency 140 20 VOLTAGE GAIN (dB) 80 60 VS = ± 15V 40 VS = 5V, 0V 20 120 ±15V 140 10 ±15V GAIN 0 5V, 0V 160 180 5V, 0V 200 0 TA = 25°C VS = 5V, 0V VIN = 3Vp-p RL = 2k 100 PHASE SHIFT (DEGREES) PHASE 100 140 LIMITED BY THERMAL INTERACTION 120 RS = 1kΩ 100 80 LIMITED BY PIN TO PIN CAPACITANCE –10 – 20 0.01 0.1 60 1 0.
PAGE 7
LT1413 U W U U APPLICATIONS INFORMATION Single Supply Operation The LT1413 is fully specified for single supply operation, i.e., when the negative supply is 0V. Input common-mode range includes ground; the output swings within a few millivolts of ground. If the input is more than a few hundred millivolts below ground, two distinct problems can occur on previous single supply designs, such as the LM124, LM158, OP-21 and OP-221.
PAGE 8
LT1413 W W SIMPLIFIED SCHEMATIC 1/2 LT1413 V+ 1k 3.5µA 3.5µA 11µA 10µA 11µA 800Ω 80µA Q36 Q32 Q35 Q30 Q3 Q6 Q4 V– J1 Q5 Q25 3.9k Q27 Q1 400Ω IN – Q33 21pF Q26 2.5pF Q17 2.4k 18Ω 16k Q16 Q21 OUTPUT Q2 Q28 600Ω 400Ω Q18 IN+ Q22 4pF Q12 Q10 Q29 Q31 Q19 Q11 75pF V– Q14 Q15 100pF Q24 Q8 Q9 Q34 2k 10pF Q7 5k 5k 30Ω 15µA 18µA 48k 600Ω 600Ω 15µA LT1413 • TA26 U PACKAGE DESCRIPTION 0.300 – 0.320 (7.620 – 8.128) N8 Package, 8-Lead Plastic DIP 0.045 – 0.065 (1.