LT1994IMS8#PBF Linear Technology, LT1994IMS8#PBF Datasheet

IC DIFF AMP/DRIVER LN 8-MSOP

LT1994IMS8#PBF

Manufacturer Part Number
LT1994IMS8#PBF
Description
IC DIFF AMP/DRIVER LN 8-MSOP
Manufacturer
Linear Technology
Type
Differential Amplifierr
Datasheet

Specifications of LT1994IMS8#PBF

Amplifier Type
Differential
Number Of Circuits
1
Output Type
Differential
Slew Rate
65 V/µs
Gain Bandwidth Product
70MHz
Current - Input Bias
18µA
Voltage - Input Offset
3000µV
Current - Supply
14.8mA
Current - Output / Channel
85mA
Voltage - Supply, Single/dual (±)
2.375 V ~ 12.6 V, ±1.188 V ~ 6.3 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
No. Of Amplifiers
1
Input Offset Voltage
3mV
Gain Db Max
1dB
Bandwidth
70MHz
Supply Voltage Range
2.375V To 12.6V
Supply Current
14.8mA
Amplifier Case Style
MSOP
Rohs Compliant
Yes
Number Of Channels
1
Number Of Elements
1
Power Supply Requirement
Single/Dual
Common Mode Rejection Ratio
55dB
Voltage Gain Db
100dB
Unity Gain Bandwidth Product (typ)
70MHz
Input Resistance
0.7@3VMohm
Input Bias Current
45@5V@-40C TO 8nA
Single Supply Voltage (typ)
3/5/9/12V
Dual Supply Voltage (typ)
±3/±5V
Power Supply Rejection Ratio
69dB
Rail/rail I/o Type
Rail to Rail Output
Single Supply Voltage (min)
2.375V
Single Supply Voltage (max)
12.6V
Dual Supply Voltage (min)
±1.1875V
Dual Supply Voltage (max)
±6.3V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
8
Package Type
MSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
-3db Bandwidth
-
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT1994IMS8#PBFLT1994IMS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1994IMS8#PBF
Manufacturer:
ALTERA
0
Company:
Part Number:
LT1994IMS8#PBF
Manufacturer:
LINEAR进口
Quantity:
20 000
Company:
Part Number:
LT1994IMS8#PBFLT1994IMS8#TRPBF
Manufacturer:
LT
Quantity:
2 100
Company:
Part Number:
LT1994IMS8#PBFLT1994IMS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
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n
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n
n
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n
APPLICATIONS
n
n
n
n
n
TYPICAL APPLICATION
Fully Differential Input and Output
Wide Supply Range: 2.375V to 12.6V
Rail-to-Rail Output Swing
Low Noise: 3nV/√Hz
Low Distortion, 2V
Adjustable Output Common Mode Voltage
Unity-Gain Stable
Gain-Bandwidth: 70MHz
Slew Rate: 65V/μs
Large Output Current: 85mA
DC Voltage Offset <2mV Max
Open-Loop Gain: 100V/mV
Low Power Shutdown
8-Pin MSOP or 3mm × 3mm DFN Package
Differential Input A/D Converter Driver
Single-Ended to Differential Conversion
Differential Amplifi cation with Common Mode
Translation
Rail-to-Rail Differential Line Driver/Receiver
Low Voltage, Low Noise, Differential Signal
Processing
2V
V
P-P
IN
0.1μF
A/D Preamplifi er: Single-Ended Input to Differential Output
499Ω
499Ω
V
3V
+
with Common Mode Level Shifting
OCM
P-P
+
499Ω
499Ω
LT1994
, 1MHz: –94dBc
0.1μF
V
24.9Ω
24.9Ω
OCM
= 1.5V
47pF
A
LTC1403A-1
A
IN
IN
+
GND
V
3V 10μF
DD
CONV
V
SD0
SCK
REF
DESCRIPTION
The LT
tion, fully differential input/output amplifi er optimized for
3V, single-supply operation. The LT1994’s output common
mode voltage is independent of the input common mode
voltage, and is adjustable by applying a voltage on the
V
path provides accurate output phase balancing and reduced
even-order harmonics. This makes the LT1994 ideal for
level shifting ground referenced signals for driving dif-
ferential input, single-supply ADCs.
The LT1994 output can swing rail-to-rail and is capable
of sourcing and sinking up to 85mA. In addition to the
low distortion characteristics, the LT1994 has a low input
referred voltage noise of 3nV/√Hz. This part maintains
its performance for supply voltages as low as 2.375V. It
draws only 13.3mA of supply current and has a hardware
shutdown feature that reduces current consumption to
225μA.
The LT1994 is available in an 8-pin MSOP or 8-pin DFN
package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
10μF
OCM
50.4MHz
1994 TA01
Low Noise, Low Distortion
®
pin. A separate internal common mode feedback
Output Amplifi er/Driver
1994 is a high precision, very low noise, low distor-
Fully Differential Input/
–100
–110
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
LT1994 Driving an LTC1403A-1 1MHz
0
0
Sine Wave, 8192 Point FFT Plot
f
f
INPUT = 2V
SINGLE ENDED
SFDR = 93dB
SAMPLE
IN
= 1.001MHz
= 2.8Msps
0.35
P-P
FREQUENCY (MHz)
,
0.70
LT1994
1.05
1994 TA01b
1.40
1994fb
1

Related parts for LT1994IMS8#PBF

LT1994IMS8#PBF Summary of contents

Page 1

... The LT1994 is available in an 8-pin MSOP or 8-pin DFN package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 3V 10μF V SD0 ...

Page 2

... LT1994MPDD#PBF LT1994MPDD#TRPBF LT1994CMS8#PBF LT1994CMS8#TRPBF LT1994IMS8#PBF LT1994IMS8#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 499Ω 800Ω mid-supply voltage (See Figure 1) unless otherwise noted – )/2. V ...

Page 4

LT1994 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 499Ω 800Ω mid-supply voltage (See Figure 1) unless otherwise noted – )/2. ...

Page 5

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 499Ω 800Ω mid-supply voltage (See Figure 1) unless otherwise noted – )/2. V ...

Page 6

LT1994 TYPICAL PERFORMANCE CHARACTERISTICS Differential Input Referred Voltage Offset vs Temperature 500 1. 1.5V OCM 250 FOUR TYPICAL UNITS 0 –250 –500 –750 –50 – TEMPERATURE (°C) ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Input Common Mode Rejection vs Frequency 100 V ICM OSDIFF 10k 100k 1M 10M 100M FREQUENCY (Hz) 1995 G10 Differential ...

Page 8

LT1994 TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Step Response 25pF LOAD + OUT 0pF LOAD 499Ω 100mV , IN P-P SINGLE ENDED – OUT 20ns/DIV 1994 G18 Supply Current vs ...

Page 9

PIN FUNCTIONS + – (Pins 1, 8): Noninverting and Inverting Input Pins of the Amplifi er, Respectively. For best performance highly recommended that stray capacitance be kept to an absolute minimum by keeping printed circuit ...

Page 10

LT1994 APPLICATIONS INFORMATION Functional Description The LT1994 is a small outline, wideband, low noise and low distortion fully-differential amplifi er with accurate output-phase balancing. The LT1994 is optimized to drive low voltage, single-supply, differential input ana- log-to-digital converters (ADCs). The ...

Page 11

APPLICATIONS INFORMATION General Amplifi er Applications As levels of integration have increased and, correspond- ingly, system supply voltages decreased, there has been a need for ADCs to process signals differentially in order to maintain good signal-to-noise ratios. These ADCs are ...

Page 12

LT1994 APPLICATIONS INFORMATION V is defi ned as the average of the two input voltages, ICM V and V (also called the input common mode INP INM voltage • ICM INP INM ...

Page 13

APPLICATIONS INFORMATION Input Common Mode Voltage Range The LT1994’s input common mode voltage (V as the average of the two input voltages, V – It extends from V to approximately 1.25V below V input common mode range depends on the ...

Page 14

LT1994 APPLICATIONS INFORMATION A plot of this equation and a plot of the noise generated by the feedback components are shown in Figure 6. The LT1994’s input referred voltage noise contributes the equivalent noise of a 560Ω resistor. When the ...

Page 15

APPLICATIONS INFORMATION In general, the die temperature can be estimated from the ambient temperature T , and the device power dis- A sipation • θ The power ...

Page 16

LT1994 APPLICATIONS INFORMATION 0.1μF ceramic capacitor in single-supply applications. This will help prevent thermal noise from the internal 80kΩ-80kΩ voltage divider (25nV/√Hz) and other exter- nal sources of noise from being converted to differential noise due to mismatches in the ...

Page 17

TYPICAL APPLICATIONS Differential 1st Order Lowpass Filter Maximum –3dB frequency (f ) 2MHz 3dB Stopband attenuation: –6dB at 2 • f 3dB C11 R11 R21 – 0.1μ – LT1994 8 0.1μF ...

Page 18

LT1994 TYPICAL APPLICATIONS 3. Calculate R3, R2 and R1 using the standard 5% C2 value, the specifi and the specifi ed passband 3dB gain (Gn) ≤ ≤ MHz and Gain Gain 3 ...

Page 19

PACKAGE DESCRIPTION 3.5 0.05 1.65 0.05 2.15 0.05 (2 SIDES) 0.25 0.05 0.50 BSC 2.38 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. DRAWING ...

Page 20

... LT1994 I 2 OUT 8 0.1μ 1μF 140Ω 1k 82pF 120pF 82pF 1μF 140Ω 0.1μF 120pF 120pF LT1994 Q 2 OUT 8 0.1μ 1μF 140Ω 1k 82pF 1994 TA02 LT 0309 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 1994fb ...

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