LINER LT6012 1.3mhz, 20î¼a power efficient rail-to-rail i/o op amp Datasheet

LTC6258/LTC6259/LTC6260
1.3MHz, 20µA Power
Efficient Rail-to-Rail I/O
Op Amps
DESCRIPTION
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Gain Bandwidth Product: 1.3MHz
Low Quiescent Current: 20µA
C-Load™ Op Amp Drives all Capacitive Loads
Offset Voltage: 400µV Maximum
Rail-to-Rail Input and Output
Supply Voltage Range: 1.8V to 5.25V
EMI Rejection Ratio: 45dB at 1GHz
Input Bias Current: 75nA Maximum
CMRR/PSRR: 95dB/90dB
Shutdown Current: 7µA Maximum
Operating Temperature Range: –40°C to 125°C
Single in 6-Lead TSOT-23, 2mm × 2mm DFN
Packages
Dual in 8-Lead MS8, MS10, TS0T-23, 2mm × 2mm
DFN Packages
Quad in MS16 Package
APPLICATIONS
n
n
n
n
The LTC®6258/LTC6259/LTC6260 are single/dual/quad
operational amplifiers with low noise, low power, low
supply voltage, and rail-to-rail inputs and outputs. They
are unity gain stable with or without capacitive loads. They
feature 1.3MHz gain-bandwidth product, 0.24V/µs slew rate
while consuming only 20µA of supply current per amplifier
operating on supply voltages ranging from 1.8V to 5.25V.
The combination of low supply current, low supply voltage, high gain bandwidth product and low noise makes
the LTC6258 family unique among rail-to-rail input/output
op amps with similar supply current. These operational
amplifiers are ideal for power efficient applications.
For applications that require power-down, the LTC6258
in 2mm × 2mm DFN and LTC6259 MS10 packages
respectively offer shutdown which reduces the current
consumption to 7µA maximum.
The LTC6258 family can be used as plug-in replacements
for many commercially available op amps to reduce power
and improve input/output range and performance.
Micropower Active Filters
Portable Instrumentation
Battery or Solar Powered Systems
Automotive Electronics
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Over-The-Top and C-Load are trademarks of Analog Devices, Inc. All other trademarks are the
property of their respective owners.
TYPICAL APPLICATION
Low Noise Reference
Reference Buffer Noise Density
5000
5V
LT6656
IN
OUT
GND
–
+
22µF
OP AMP, 44µF CLOAD
OP AMP
FILTERED REFERENCE
REFERENCE OUTPUT
INSTRUMENT ONLY
4500
OUT
LTC6258
22µF
22µF
6258960 TA01
4000
NOISE DENSITY (nV/√Hz)
V+
RIN1
2.7k
3500
3000
2500
2000
* 2.7K + 22µF FILTER
1500
1000
500
0
0.01
0.1
1
10
FREQUENCY (kHz)
100
6258960 TA01a
6258960fa
For more information www.linear.com/LTC6258
1
LTC6258/LTC6259/LTC6260
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage: V+ – V–............................................5.5V
Input Voltage .................................... V– – 0.2 to V+ + 0.2
Input Current: +IN, –IN, SHDN (Note 2)................ ±10mA
Output Current: OUT............................................ ±20mA
Output Short-Circuit Duration (Note 3)............. Indefinite
Operating Temperature Range (Note 4)...... –40°C to 125°C
Specified Temperature Range (Note 5)
LTC6258I/LTC6259I/LTC6260I.............–40°C to 85°C
LTC6258H/LTC6259H/LTC6260H....... –40°C to 125°C
Maximum Junction Temperature........................... 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TS8, MS8, MS only................................................ 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
7
V–
+IN 2
V– 3
8 V+
OUTA 1
6 OUT
–INA 2
5 –IN
4 SHDN
5 +INB
DC PACKAGE
8-LEAD (2mm × 2mm × 0.8mm) PLASTIC DFN
TJMAX = 150°C, qJA = 80°C/W (NOTE 6)
EXPOSED PAD (PIN 9) IS V–, MUST BE SOLDERED TO PCB
TJMAX = 150°C, qJA = 80°C/W (NOTE 6)
EXPOSED PAD (PIN 7) IS V–, MUST BE SOLDERED TO PCB
TOP VIEW
1
2
3
4
8
7
6
5
–
+
6 –INB
V– 4
DC PACKAGE
6-LEAD (2mm × 2mm × 0.8mm) PLASTIC DFN
+
–
OUTA
–INA
+INA
V–
7 OUTB
9
V–
+INA 3
TOP VIEW
V+
OUTB
–INB
+INB
OUTA
–INA
+INA
V–
1
2
3
4
–
+
8
7
6
5
+
–
V+ 1
V+
OUTB
–INB
+INB
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, qJA = 163°C/W (NOTE 6)
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
TJMAX = 150°C, qJA = 195°C/W (NOTE 6)
TOP VIEW
1
2
3
4
5
–
+
+
–
OUTA
–INA
+INA
V–
SHDNA
10
9
8
7
6
OUTA
–INA
+INA
V+
+INB
–INB
OUTB
NC
V+
OUTB
–INB
+INB
SHDNB
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 150°C, qJA = 160°C/W (NOTE 6)
1
2
3
4
5
6
7
8
–
+
+
–
+
–
TOP VIEW
+
–
16
15
14
13
12
11
10
9
OUTD
–IND
+IND
V–
+INC
–INC
OUTC
NC
MS PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 150°C, qJA = 125°C/W (NOTE 6)
TOP VIEW
6 V+
V– 2
+IN 3
+
–
OUT 1
5 SHDN
4 –IN
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 150°C, qJA = 192°C/W (NOTE 6)
6258960fa
2
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
ORDER INFORMATION
http://www.linear.com/product/LTC6258#orderinfo
TAPE AND REEL (MINI)
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
SPECIFIED
TEMPERATURE RANGE
LTC6258IS6#TRMPBF
LTC6258IS6#TRPBF
LTGWD
6-Lead Plastic TSOT-23
–40°C to 85°C
LTC6258HS6#TRMPBF
LTC6258HS6#TRPBF
LTGWD
6-Lead Plastic TSOT-23
–40°C to 125°C
LTC6258IDC#TRMPBF
LTC6258IDC#TRPBF
LGZS
6-Lead Plastic DFN (2mm × 2mm × 0.8mm)
–40°C to 85°C
LTC6258HDC#TRMPBF
LTC6258HDC#TRPBF
LGZS
6-Lead Plastic DFN (2mm × 2mm × 0.8mm)
–40°C to 125°C
LTC6259ITS8#TRMPBF
LTC6259ITS8#TRPBF
LTGWX
8-Lead Plastic TSOT-23
–40°C to 85°C
LTC6259HTS8#TRMPBF
LTC6259HTS8#TRPBF
LTGWX
8-Lead Plastic TSOT-23
–40°C to 125°C
LTC6259IDC#TRMPBF
LTC6259IDC#TRPBF
LGWT
8-Lead (2mm × 2mm × 0.8mm) Plastic DFN
–40°C to 85°C
LTC6259HDC#TRMPBF
LTC6259HDC#TRPBF
LGWT
8-Lead (2mm × 2mm × 0.8mm) Plastic DFN
–40°C to 125°C
LTC6259IMS8#PBF
LTC6259IMS8#TRPBF
LTGWW
8-Lead Plastic MSOP
–40°C to 85°C
LTC6259HMS8#PBF
LTC6259HMS8#TRPBF
LTGWW
8-Lead Plastic MSOP
–40°C to 125°C
LTC6259IMS#PBF
LTC6259IMS8#TRPBF
LTGWY
10-Lead Plastic MSOP
–40°C to 85°C
LTC6259HMS#PBF
LTC6259HMS8#TRPBF
LTGWY
10-Lead Plastic MSOP
–40°C to 125°C
LTC6260IMS#PBF
LTC6260IMS#TRPBF
6260
16-Lead Plastic MSOP
–40°C to 85°C
TUBE
LTC6260HMS#PBF
LTC6260HMS#TRPBF
6260
16-Lead Plastic MSOP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Parts ending with PBF are RoHS and WEEE Compliant.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/.
5V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 5V, VCM = VOUT = VSUPPLY/2, CL = 10pF, VSHDN is unconnected.
SYMBOL PARAMETER
VOS
Input Offset Voltage
CONDITIONS
VCM
= V – + 0.3V
VCM = V + – 0.3V
∆VOS/∆T
IB
IOS
en
Input Offset Voltage Drift
Input Bias Current (Note 7)
Input Offset Current
MIN
TYP
MAX
UNITS
–400
100
400
1000
µV
µV
–400
100
400
1000
µV
µV
l –1000
l –1000
VCM = V – + 0.3V, V+ – 0.3V
1.5
µV/°C
= V – + 0.3V
l
–75
–5
75
nA
VCM = V + – 0.3V
l
–75
0
75
nA
VCM
= V – + 0.3V
l
–75
–1
75
nA
VCM
= V + – 0.3V
l
–75
–1
75
VCM
Input Voltage Noise Density
f = 1kHz
Input Noise Voltage
f = 0.1Hz to 10Hz
in
Input Current Noise Density
RIN
Input Resistance
f = 1kHz, VCM = 0V to 4V
f = 1kHz, VCM = 4V to 5V
Differential
Common Mode
38
1
10
nA
nV/√Hz
2
µVP-P
500
500
fA/√Hz
fA/√Hz
MΩ
MΩ
6258960fa
For more information www.linear.com/LTC6258
3
LTC6258/LTC6259/LTC6260
5V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 5V, VCM = VOUT = VSUPPLY/2, CL = 10pF, VSHDN is unconnected.
SYMBOL PARAMETER
CONDITIONS
CIN
Input Capacitance
CMRR
Common Mode Rejection Ratio
Differential
Common Mode
VCM = 0.3V to 3.5V
VCM = –0.1V to 5.1V
IVR
PSRR
Input Voltage Range
Power Supply Rejection Ratio
AV
Supply Voltage Range
Large Signal Gain
Output Swing Low (Input Overdrive 30mV).
Measured from V–
Supply Current per Amplifier
5.1
5.25
40
10
80
l
145
l
25
l
ISOURCE = 1mA
35
l
100
l
l
l
4
1
16
11
20
l
ISHDN
Shutdown Pin Current
VIL
VIH
tON
tOFF
GBW
SHDN Input Low Voltage
SHDN Input High Voltage
Turn-On Time
Turn-Off Time
Gain-Bandwidth Product
VSHDN = 0.6V
VSHDN = 1.5V
Disable
Enable
SHDN Toggle from 0V to 5V
SHDN Toggle from 5V to 0V
f = 10kHz
l
l
l
tS
Settling Time, 0.5V to 4.5V, Unity Gain
SR
Slew Rate
FPBW
THD+N
Full Power Bandwidth (Note 8)
Total Harmonic Distortion and Noise
ILEAK
Output Leakage Current in Shutdown
%MP
EMIRR
Large Signal Overshoot
Electromagnetic Interference Rejection Ratio
0.1%
0.01%
AV = –1, VOUT = 0.5V to 4.5V, CLOAD = 10pF,
RF = RG = 10kΩ
4VP-P
f = 500Hz, AV = 2, RL = 4kΩ, VOUTP-P = 1V
VIN = 2.25V to 2.75V
VSHDN = 0V, VOUT = 0V
VSHDN = 0V, VOUT = 5V
VIN = 0.5V to 4.5V, AV = 1, CL = 100nF
Input Power –10dB to Input Pins at 1GHz
60
0
l
l
l
l
l
1.5
1.0
0.4
0.2
0.1
40
50
105
120
180
250
40
65
55
100
140
350
10
4
Supply Current in Shutdown
MAX
90
12
No Load
ISOURCE = 100µA
IS
l
TYP
0.65
1.2
95
95
l
Output Swing High (Input Overdrive 30mV).
Measured from V+
Output Short-Circuit Current
l
66
64
–0.1
78
68
1.8
14
2.8
3.5
0.5
No Load
ISINK = 1mA
ISC
l
l
VOUT = 0.5V to 4.5V, RLOAD = 100k
ISINK = 100µA
VOH
l
l
l
VCM = 0.4V, VS = 1.8V to 5.25V
VOUT = 0.5V to 4.5V, RLOAD = 10k
VOL
MIN
152
7
1.3
14
18
0.24
20
0.025
72
100
100
2.7
45
23
25
5
7
200
15
0.6
UNITS
pF
pF
dB
dB
V
dB
dB
V
V/mV
V/mV
V/mV
V/mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
µA
µA
µA
µA
nA
nA
V
V
µs
µs
MHz
MHz
µs
µs
V/µs
V/µs
kHz
%
dB
nA
nA
%
dB
6258960fa
4
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
1.8V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 1.8V, VCM = VOUT = 0.4V, CL = 10pF, VSHDN is
unconnected.
SYMBOL PARAMETER
VOS
Input Offset Voltage
CONDITIONS
VCM
= V– + 0.3V
VCM = V+ – 0.3V
∆VOS/∆T
IB
IOS
en
Input Offset Voltage Drift
Input Bias Current (Note 7)
Input Offset Current
–400
100
400
1000
µV
µV
l –1000
1.5
µV/°C
2
75
nA
5
75
nA
VCM
= V– + 0.3V
l
–75
2
75
nA
VCM
= V+ – 0.3V
l
–75
2
75
RIN
Input Resistance
Differential
Common Mode
CIN
Input Capacitance
Differential
Common Mode
CMRR
Common Mode Rejection Ratio
VCM = 0.2V to 1.6V
38
nA
nV/√Hz
2
µVP-P
500
500
fA/√Hz
fA/√Hz
1
10
MΩ
MΩ
0.65
1.2
pF
pF
90
dB
dB
l
70
61
l
–0.1
90
l
78
68
dB
dB
15
1.6
50
l
V/mV
V/mV
4
0.4
10
l
V/mV
V/mV
VCM = 0.4V, VS = 1.8V to 5.25V
VOUT = 0.5V to 1.3V, RLOAD = 100k
VOUT = 0.5V to 1.3V, RLOAD = 10k
Output Swing Low (Input Overdrive 30mV),
Measured from V–
µV
µV
–75
f = 1kHz, VCM = 0V to 0.8V
f = 1kHz, VCM = 1V to 1.8V
VOL
400
1000
–75
f = 0.1Hz to 10Hz
Large Signal Gain
100
l
Input Current Noise Density
AV
–400
l –1000
l
Input Noise Voltage
Input Voltage Range
UNITS
VCM = V+ – 0.3V
VCM
in
Power Supply Rejection Ratio
MAX
= V– + 0.3V
f = 1kHz, VCM = 0.4V
IVR
TYP
VCM = V– + 0.3V, V+ – 0.3V
Input Voltage Noise Density
PSRR
MIN
No Load
1.9
15
30
50
mV
mV
80
110
130
mV
mV
150
200
230
mV
mV
l
ISINK = 100µA
l
ISINK = 1mA
l
V
6258960fa
For more information www.linear.com/LTC6258
5
LTC6258/LTC6259/LTC6260
1.8V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 1.8V, VCM = VOUT = 0.4V, CL = 10pF, VSHDN is
unconnected.
SYMBOL PARAMETER
VOH
Output Swing High (Input Overdrive 30mV),
Measured from V+
CONDITIONS
MIN
No Load
TYP
MAX
25
40
50
mV
mV
35
60
100
mV
mV
95
140
300
mV
mV
l
ISOURCE = 100µA
l
ISOURCE = 1mA
l
ISC
IS
Output Short-Circuit Current
UNITS
4
1
10
l
17
10
20
l
21
23
µA
µA
1.0
1.5
2
µA
µA
50
0
80
10
nA
nA
0.5
V
Supply Current per Amplifier
Supply Current in Shutdown
l
ISHDN
Shutdown Pin Current
VSHDN = 0.5V
VSHDN = 1.5V
l
l
VIL
SHDN Input Low Voltage
Disable
l
VIH
SHDN Input High Voltage
Enable
l
1.5
mA
mA
V
tON
Turn-On Time
SHDN Toggle From 0V to 1.8V
47
µs
tOFF
Turn-Off Time
SHDN Toggle From 1.8V to 0V
17
µs
GBW
Gain-Bandwidth Product
f = 10kHz
1.3
MHz
MHz
7
12
µs
µs
l
TS
Settling Time, 0.3V to 1.5V, Unity Gain
0.1%
0.01%
SR
Slew Rate
AV = –1, VOUT = 0.3V to 1.5V, CLOAD = 10pF
RF = RG = 10kΩ
FPBW
Full Power Bandwidth (Note 8)
1.2VP-P
THD+N
Total Harmonic Distortion and Noise
f = 500Hz, AV = 2, RL = 4kΩ, VOUTP-P = 1V
VIN = 0.65V to 0.15V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The inputs are protected by back-to-back diodes as well as ESD
protection diodes to each power supply. If the differential input voltage
exceeds 1.4V or the input extends more than 500mV beyond the power
supply, the input current should be limited to less than 10mA.
Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 4: LTC6258I/LTC6259I/LTC6260I and LTC6258H/LTC6259H/
LTC6260H are guaranteed functional over the temperature range of
–40°C to 125°C.
l
1.0
0.4
0.16
0.1
0.22
V/µs
V/µs
58
kHz
0.04
68
%
dB
Note 5: The LTC6258I/LTC6259I/LTC6260I are guaranteed to meet
specified performance from –40°C to 85°C. The LTC6258H/LTC6259H/
LTC6260H are guaranteed to meet specified performance from –40°C to
125°C.
Note 6: Thermal resistance varies with the amount of PC board metal
connected to the package. The specified values are for short traces
connected to the leads.
Note 7: The input bias current is the average of the currents into the
positive and negative input pins.
Note 8: Full power bandwidth is calculated from the slew rate FPBW =
SR/π • VP-P.
6258960fa
6
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
TYPICAL PERFORMANCE CHARACTERISTICS
Input VOS Histogram
100
VS = ±2.5V
VCM = 0V
300
70
200
60
100
50
40
30
VOS (µV)
80
70
60
50
40
–200
20
20
–300
10
10
–400
250
0
–350 –250 –150 –50 50
VOS (µV)
350
6258 G01
9
200
VS = ±2.5V
VCM=0V
HGRADE
IND
10
250
–500
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
350
6258 G02
6258 G03
VOS vs Common Mode
Voltage
160
8
VOS (µV)
7
6
5
500
VCM = 0.4V
120
300
80
200
40
100
0
–40
4
0
–100
–80
–200
2
–120
–300
1
–160
–400
0
–200
1.8
3
–5 –4 –3 –2 –1 0 1 2 3
DISTRIBUTION (µV/°C)
4
5
2.4
3.0
3.6
4.2
SUPPLY VOLTAGE (V)
4.8
6258 G04
Input Bias Current vs Common
Mode Voltage
VOS vs IOUT
20
VS = ±2.5V
VCM = 0V
–40°C
25°C
125°C
0.6
VS = 5V
16
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1
2
3
4
5
6258 G07
0.5
1.5
20
+IN
–IN
VS = 1.8V
16
12
8
4
0
–4
–8
–12
–20
2.5
3.5
VCM (V)
4.5
5.5
6258 G06
Input Bias Current vs Common
Mode Voltage
–16
–5 –4 –3 –2 –1 0 1
IOUT (mA)
–500
–0.5
INPUT BIAS CURRENT (nA)
0.8
5.4
6258 G05
INPUT BIAS CURRENT (nA)
1.0
VS = 5V
400
VOS (µV)
11
150
VOS vs Supply Voltage (25°C)
Input Offset Drift Distribution
VOS (mV)
0
–100
30
150
VS = ±2.5V
VCM = 0V
400
80
0
–350 –250 –150 –50 50
VOS (µV)
NUMBER OF UNITS
VOS vs Temperature
500
VS = ±2.5V
VCM = 2.2V
90
NUMBER OF PARTS
NUMBER OF PARTS
90
Input VOS Histogram
100
+IN
–IN
12
8
4
0
–4
–8
–12
–16
0
0.5
1
1.5
2
2.5 3
VCM (V)
3.5
4
4.5
5
6258 G08
–20
0
0.3
0.6
0.9
1.2
VCM (V)
1.5
1.8
6258 G09
6258960fa
For more information www.linear.com/LTC6258
7
LTC6258/LTC6259/LTC6260
TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias Current
vs Supply Voltage
10
20
+IB (nA)
–IB (nA)
15
INPUT BIAS CURRENT (nA)
INPUT BIAS CURRENT (nA)
6
4
2
0
–2
–4
–6
–8
2.3
2.8 3.3 3.8 4.3
SUPPLY VOLTAGE (V)
4.8
5
0
–5
+IB, VCM = 2V
–IB, VCM = 2V
+IB, VCM = –2V
–IB, VCM = –2V
–10
SUPPLY CURRENT (µA)
10
5
10
40
70
TEMPERATURE (°C)
100
130
SATURATION VOLTAGE FROM TOP RAIL (mV)
VCM = 0.4V
15
–20
–100
–150
–40°C/5V
25°C/5V
85°C/5V
125°C/5V
–40°C/1.8V
25°C/1.8V
85°C/1.8V
125°C/1.8V
–200
–250
–300
–350
0
10
125°C
25°C
–40°C
2.8 3.3 3.8 4.3
SUPPLY VOLTAGE (V)
4.8
5.3
6258 G16
0
0.5
1
1.5 2 2.5 3 3.5
SUPPLY VOLTAGE (V)
4
0.5
1
1.5
LOAD CURRENT (mA)
2
350
250
200
150
100
50
0
0
0.5
1
1.5
LOAD CURRENT (mA)
2
6258 G15
0.1Hz to 10Hz Output
Voltage Noise
5
VS = ±2.5V
VCM = 0.4V
AV = 1
4
25
3
20
15
10
0
1.8
125°C
25°C
–40°C
2.3
2.8 3.3 3.8 4.3
SUPPLY VOLTAGE (V)
5
–40°C/5V
25°C/5V
85°C/5V
125°C/5V
–40°C/1.8V
25°C/1.8V
85°C/1.8V
125°C/1.8V
300
VCM = 0.4V
5
4.5
6258 G12
NOISE VOLTAGE (µV)
MAXIMUM SINKING CURRENT (mA)
MAXIMUM SOURCING CURRENT (mA)
30
15
2.3
0
Output Short-Circuit Current
vs Supply Voltage (Sinking)
20
25°C
–40°C
125°C
6258 G14
VCM = 0.4V
0
1.8
6
Output Saturation Voltage
vs Load Current
–50
Output Short-Circuit Current
vs Supply Voltage (Sourcing)
5
8
2
0
6258 G13
25
10
Output Saturation Voltage
vs Load Current
20
0
–50
12
6262 G11
Supply Current
vs Temperature Per Channel
VS = 5V
VS = 1.8V
14
4
–20
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
5.3
VS = 5V
VCM = 0.4V
16
6258 G10
25
18
10
–15
–10
1.8
20
VS = ±2.5V
SUPPLY CURRENT (uA)
VCM = 0.4V
SATURATION VOLTAGE FROM BOTTOM RAIL (mV)
8
Supply Current vs Supply Voltage
per Channel
Input Bias Current vs Temperature
4.8
5.3
6259 G17
2
1
0
–1
–2
–3
–4
–5
0
1
2
3
4 5 6
TIME (s)
7
8
9
10
6258 G18
6258960fa
8
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
TYPICAL PERFORMANCE CHARACTERISTICS
Noise Voltage Density
vs Frequency
Input Referred Current Noise
vs Frequency
400
350
300
250
200
150
100
50
1
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
1
1
1kHz
500Hz
0.01
0.1
GAIN (dB)
72
20
63
10
54
0
45
–10
36
–20
27
1
–50
10k
10
60
50
40
5
4
40
30
20
20
10
10
6258 G25
5
Capacitive Load Handling
Overshoot vs Capacitive Load
50
30
10M
2.6
3.4
4.2
SUPPLY VOLTAGE (V)
6258 G24
OVERSHOOT (%)
70
60
PSRR (dB)
CMRR (dB)
0
1.8
VS = 5V
VCM = 0.4V
90
70
100k
1M
FREQUENCY (Hz)
0.1
0
10M
100k
1M
FREQUENCY (Hz)
100
80
10k
RISING
FALLING
Power Supply Rejection Ratio
vs Frequency
VCM = ±2.5V
VCM = 0V
1k
0.2
6258 G23
80
0
0.3
9
6258 G23
Common Mode Rejection Ratio
vs Frequency
90
18
GAIN
PHASE
–40
VS = 5V
VSTEP = VS – 1V
0.4 AV = –1
RG=RF = 10kΩ
81
30
–30
1kHz
500Hz
100
VS = ±2.5V
VCM = 0V
40
6259 G21
0.5
90
PHASE
THD+N (%)
50
1
Slew Rate vs Supply Voltage
Gain and Phase vs Frequency
0.1
VOUTP-P (V)
0.1
VOUTP–P (V)
6258 G20
VS = ±2.5V
VCM = 0V
AV = 2
RG = RF = 10kΩ
0.1
0.01
0.01
1
FREQUENCY (MHz)
Total Harmonic Distortion
and Noise
0.01
0.01
0.1
0.1
6258 G19
1
VS = ±0.9V
VCM = 0V
AV = 2
RG = RF = 10kΩ
VS = 2.5V
VCM = 0V
SLEW RATE (V/µs)
0
10
THD+N (%)
VS = ±2.5V
VCM = 0V
450
INPUT REFERRED CURRENT NOISE (pA/√Hz)
INPUT REFERRED VOLTAGE NOISE (nV/√Hz)
500
Total Harmonic Distortion
and Noise
0
100
VS = ±2.5V
VCM = 0V
AV = 1
VIN = ±2V
3
2
1
1k
10k
100k
FREQUENCY (Hz)
1M
10M
6258 G26
0
0.01
0.1
1
10
CAPACITIVE LOAD (nF)
100
6258 G27
6258960fa
For more information www.linear.com/LTC6258
9
LTC6258/LTC6259/LTC6260
TYPICAL PERFORMANCE CHARACTERISTICS
Large-Signal Response
50
2.0
40
0
–0.5
10pF
100pF
1nF
10nF
100nF
–1.0
–1.5
–2.0
–2.5
0
200
0.4
0
–10
CLOAD
CLOAD
CLOAD
CLOAD
CLOAD
–20
–30
–40
400
600
TIME (µs)
0.6
10
800
–50
1000
0
200
= 10pF
= 100pF
= 1nF
= 10nF
= 100nF
400
600
TIME (µs)
10k
–0.8
800
10
0
–10
CLOAD
CLOAD
CLOAD
CLOAD
CLOAD
–20
–30
–40
–50
0
200
= 10pF
= 100pF
= 1nF
= 10nF
= 100nF
400
600
TIME (µs)
800
1000
10
1
AV = 10
AV = 1
0.1
0.01
0.1
1
FREQUENCY (kHz)
10
EMI REJECTION RATIO (dB)
SUPPLY CURRENT (µA)
15
10
TA = 125°C
TA = 25°C
TA = –40°C
5
0
0
0.4
0.8
1.2
VSHDN (V)
1.6
2
6258 G33
Electromagnetic Interference
Rejection Ratio
VS = 2.5V
VCM = 0V
INPUT POWER = –10dBm
90
10
TA = 125°C
TA = 25°C
TA = –40°C
1.6
1000
VS = 5V
VCM = 0.4V
6258 G32
100
0.8
1.2
VSHDN (V)
800
Supply Current vs SHDN Pin
Voltage
100
15
0.4
400
600
TIME (µs)
20
20
0
200
6258 G30
1k
VS = 1.8V
VCM = 0.4V
5
0
25
Supply Current vs SHDN Pin
Voltage
0
–1.0
VS = ±2.5V
VCM = 0V
6258 G31
25
1000
SUPPLY CURRENT (µA)
OUTPUT IMPEDANCE (Ω)
VOLTAGE (mV)
20
CLOAD = 10pF
CLOAD = 100pF
CLOAD = 1nF
CLOAD = 10nF
CLOAD = 100nF
–0.6
Output Impedance vs Frequency
VS = ±0.9V
AV = 1
RLOAD = 100kΩ
30
0.0
–0.2
6259 G30
Small-Signal Response
40
0.2
–0.4
6258 G28
50
VS = ±0.9V
AV = 1
RLOAD = 100kΩ
0.8
20
VOLTAGE (mV)
0.5
VS = ±2.5V
AV = 1
RLOAD = 100kΩ
30
VS = ±2.5V
AV = 1
RLOAD = 100kΩ
1.0
Large-Signal Response
1.0
VOLTAGE (V)
1.5
VOLTAGE (V)
Small-Signal Response
2.5
80
70
60
50
40
30
+IN
–IN
20
10
2
0
10
6258 G34
100
1000
FREQUENCY (MHz)
10000
6258 G35
6258960fa
10
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
PIN FUNCTIONS
–IN: Inverting Input of the Amplifier. Voltage range of this
pin can go from V– – 0.1V to V+ + 0.1V.
+IN: Noninverting Input of Amplifier. This pin has the same
voltage range as –IN.
V+: Positive Power Supply. Typically the voltage is from
1.8V to 5.25V. Split supplies are possible as long as the
voltage between V+ and V– is between 1.8V and 5.25V. A
bypass capacitor of 0.1µF as close to the part as possible
should be used between power supply pins or between
supply pins and ground.
V–: Negative Power Supply. It is normally tied to ground.
It can also be tied to a voltage other than ground as long
as the voltage between V+ and V– is from 1.8V to 5.25V.
If it is not connected to ground, bypass it with a capacitor
of 0.1µF as close to the part as possible.
SHDN: Active Low Shutdown. Shutdown threshold is 0.6V
above negative rail. If left unconnected, the amplifier will
be on.
OUT: Amplifier Output. Rail-to rail amplifier output capable
of delivering 4mA.
6258960fa
For more information www.linear.com/LTC6258
11
LTC6258/LTC6259/LTC6260
SIMPLIFIED SCHEMATIC
V+
R3
R6
+
V+
I2
R5
Q15
V–
ESDD1
R4
+
ESDD2
C2
I1
Q12
Q11
ESDD5
Q13
+IN
SHDN
LOGIC
D6
D8
D5
D7
Q5
Q4
–IN
Q1
CC
Q2
ESDD3
ESDD4
V–
Q3
+
VBIAS
Q9
V–
BUFFER AND
OUTPUT BIAS
Q10
V+
OUT
I3
ESDD6
Q8
Q16
C1
Q17
Q18
Q19
Q7
Q14
Q6
R1
V–
R2
6258960 F01
Figure 1. LTC6258/LTC6259/LTC6260 Simplified Schematic
6258960fa
12
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
OPERATION
The LTC6258 family input signal range extends beyond the
negative and positive power supplies. Figure 1 depicts a
Simplified Schematic of the amplifier. The input stage is
comprised of two differential amplifiers, a PNP stage Q1/
Q2 and NPN stage Q3/Q4 that are active over different
ranges of common mode input voltage. The PNP stage
is active between the negative power supply to approximately 1V below the positive supply. As the input voltage
approaches the positive supply, transistor Q5 will steer the
tail current I1 to the current mirror Q6/Q7, activating the
NPN differential pair and the PNP pair becomes inactive
for the remaining input common mode range. Also for the
input stage, devices Q17, Q18 and Q19 act to cancel the
bias current of the PNP input pair. When Q1/Q2 is active,
the current in Q16 is controlled to be the same as the
current Q1/Q2. Thus, the base current of Q16 is normally
equal to the base current of the input devices of Q1/Q2.
Similar circuitry (not shown) is used to cancel the base
current of Q3/Q4. The buffer and output bias stage uses
a special compensation technique to take full advantage
of the process technology to drive high capacitive loads.
The common emitter topology of Q14/Q15 enables the
output to swing from rail to rail.
6258960fa
For more information www.linear.com/LTC6258
13
LTC6258/LTC6259/LTC6260
APPLICATIONS INFORMATION
Low Supply Voltage and Low Power Consumption
Ground Sensing and Rail to Rail Output
The LTC6258 family of operational amplifiers can operate with power supply voltages from 1.8V to 5.25V. Each
amplifier draws 20µA. The low supply voltage capability
and low supply current are ideal for portable applications.
The LTC6258 family delivers over 4mA of output drive
current. The output stage is a rail-to-rail topology that
is capable of swinging to within 300mV of either rail. If
output swing to the negative rail is required, an external
pull down resistor to a negative supply can be added.
For 5V/0V op amp supplies, a pull down resistor of 10k
to –2V will allow a ‘true zero’ output swing. In this case,
the output can swing all the way to the bottom rail while
maintaining 45dB of open loop gain. Since the inputs
can go 100mV beyond either rail, the op amp can easily
perform ‘true ground’ sensing.
High Capacitive Load Driving Capability and Wide
Bandwidth
The LTC6258 family is optimized for wide bandwidth low
power applications. They have a high gain-bandwidth
to power ratio and are unity gain stable. When the load
capacitance increases, the increased capacitance at the
output pushes the non-dominant pole to lower frequency
in the open loop frequency response, worsening the phase
and gain margin. The LTC6258 family are designed to
directly drive up to 100nF of capacitive load in unity gain
configuration (see Typical Performance Characteristics,
Capacitive Load Handling).
Low Input Referred Noise
The LTC6258 family provides a low input referred noise of
38nV/√Hz at 1kHz. The average noise voltage density over
a 100kHz bandwidth is less than 80nV/√Hz. The LTC6258
family is ideal for low noise and low power signal processing applications.
Low Input Offset Voltage
The LTC6258 family has a low offset voltage of 400μV,
which is essential for precision applications. The offset
voltage is trimmed with a proprietary trim algorithm to
ensure low offset voltage over the entire common mode
voltage range.
Low Input Bias Current
The LTC6258 family uses a bias current cancellation circuit
to compensate for the base current of the input transistors.
When the input common mode voltage is within 200mV of
either rail, the bias cancellation circuit is no longer active.
For common mode voltages ranging from 0.2V above the
negative supply to 0.2V below the positive supply, the
low input bias current allows the amplifiers to be used in
applications with high resistance sources.
The maximum output current is a function of total supply
voltage. As the supply voltage to the amplifier increases,
the maximum output current also increases. Attention must
be paid to keep the junction temperature of the IC below
150°C when the output is in continuous short-circuit. The
output of the amplifier has reverse-biased diodes connected to each supply. The output should not be forced
more than 0.5V beyond either supply, otherwise current
will flow through these diodes.
EMI Rejection
Electromagnetic interference (EMI) rejection is built into
the LTC6258 op amp family. Rejection is measured by
injecting 200mVP-P (–10dBm) RF signal into the pins and
measuring the offset change (delta_VOS). The rejection
ratio is calculated as 20log (100mV/delta_VOS).
Input Protection and Output Overdrive
To prevent breakdown of the input transistors, the input
stages are protected against a large differential input
voltage by two pairs of back-to-back diodes, D5 to D8. If
the differential input voltage exceeds 1.4V, the current in
these diodes must be limited to less than 10mA. These
amplifiers are not intended for open loop applications such
as comparators. When the output stage is overdriven,
internal limiting circuitry is activated to improve overdrive
recovery. In some applications, this circuitry may draw as
much as 1mA supply current.
6258960fa
14
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
APPLICATIONS INFORMATION
ESD
Active Filter
The LTC6258 family has reverse-biased ESD protection
diodes on all inputs and output as shown in Figure 1.
The bandpass filter Figure 3a is AC-coupled to an input.
As a result, LTC6259 input does not place a burden on
the previous stage to develop an absolute common mode
voltage. A simple resistor divider with RA1 and RA2
provides biasing for the LTC6259 inputs. Pegging the op
amp inputs to a fixed voltage helps to reduce distortion
that might arise with moving common mode. This filter is
centered at 10kHz. The exact resistance and capacitance
values can be tweaked upwards or downwards, depending
on whether lowest resistor noise or lowest total supply
current is more important.
Supply Voltage Ramping
Fast ramping of the supply voltage can cause a current
glitch in the internal ESD protection circuits. Depending on
the supply inductance, this could result in a supply voltage transient that exceeds the maximum rating. A supply
voltage ramp time of greater than 1ms is recommended.
Feedback Components
Care must be taken to ensure that the pole formed by the
feedback resistors and the parasitic capacitance at the
inverting input does not degrade stability. For example, in
a gain of +2 configuration with gain and feedback resistors of 100k, a poorly designed circuit board layout with
parasitic capacitance of 5pF (part +PC board) at the amplifier’s inverting input will cause the amplifier to oscillate
due to a pole formed at 640kHz. An additional capacitor of
4.7pF across the feedback resistor as shown in Figure 2
will eliminate any ringing or oscillation.
C1
4.7nF
R2
21k
IN
R1
10k
R8
10k
C3
4.7nF
C2
4.7nF
R3
562Ω
V+
CD2
0.1µF
–
+
CD1
1µF
Shutdown
The single and dual versions have package options with
SHDN pins that can shut down the amplifier to less than
7µA supply current. The SHDN pin voltage needs to be
within 0.6V of V– for the amplifier to shut down. During
shutdown, the output is in a high output impedance state.
When left floating, the SHDN pin is internally pulled up
to the positive supply and the amplifier remains enabled.
U1
OUT
LT6259
RA2
499k
RA1
499k
V+
6258 F03a
Figure 3a. 10kHz Bandpass Filter
5dB
5dB/DIV
4.7pF
100k
–45dB
6258 F03b
–
100k
LTC6258
CPAR
+
VIN
VOUT
Figure 3b. Frequency Response of
10kHz Bandpass Filter of Figure 3a
6258960 F02
Figure 2.
6258960fa
For more information www.linear.com/LTC6258
15
LTC6258/LTC6259/LTC6260
APPLICATIONS INFORMATION
4.7nF
21k
V+
154k
MOD
OUT
GND
+
V
LTC6992-1
10k
V+
976k
0.1µF
10k
4.7nF
0.1µF
4.7nF
–
+
OUT
LT6258
562Ω
DIV
SET
154k
1µF
182k
499k
499k
V+
6258 F04a
Figure 4a. Low Power Squarewave - Sinewave Oscillator
Low Power Sine Wave Generator
5.0
Figures 4b and 4c show the LTC6992-1 output and bandpass
filter output. THD of the sine wave is –30.5 dBc. Note, even
harmonics that appear in the distortion products of the
filtered output already appear in the source square wave.
4.0
LTC6992–1 OUTPUT (V)
A low power sine wave generator can be derived by driving a
square wave into the bandpass filter. A complete schematic
is shown in Figure 4a. The LTC6992-1 easily configures
as a 50% duty cycle 10kHz square wave, and can drive
the relatively benign loading seen in the bandpass filter.
3.0
2.0
1.0
0
50µs/Div
6258 F04b
Figure 4b. Low Power Sine Generator
Low Noise Reference
20
FILTERED OUTPUT
SQUARE WAVE
0
AMPLITUDE (dB)
The LT6656 is a 1µA precision series voltage reference.
Yet with low power comes low drive current capability
and higher noise. The LTC6259 can be used as a buffer that follows a filter to enhance the utilization of the
LT6656 in low power applications. Figure 5a shows such
a configuration. First a very low cutoff frequency follows
the LT6656 output (RIN1 and CIN1, lower than 5Hz cutoff).
Choice of filter resistor RIN1 is such that the bias current in
the LTC6259, multiplied by the resistance value, is lower
than the nominal offset voltage of the op amp. CIN1 can
be larger or smaller, with more or less filtering accordingly. The voltage withstanding requirement of CIN1 is low,
resulting in large capacitance in a small volume.
–20
–40
–60
–80
–100
–120
0
10 20 30 40 50 60 70 80 90 100
FREQUENCY (kHz)
6258 F04c
Figure 4c. FFT
6258960fa
16
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
APPLICATIONS INFORMATION
5V
V+
LT6656
IN
OUT
–
+
RIN1
2.7k
GND
OUT
LTC6258
22µF
22µF
22µF
6258960 F05a
Figure 5a. Low Noise Reference Use LT6656 for a Low Current Starting Reference
Voltage spectral noise densities are shown in Figure 5b.
Larger noise from the reference below 10kHz noticeably
drops down once a filter (RIN1 and CIN1) follow the reference. The op amp, configured in unity gain, with a large
44µF load, remains stable and contributes only a small
amount of low frequency noise. Figure 5c shows the transient response of the combination of RIN1-CIN1 filter and
op amp circuit, with and without the 44µF output capacitor.
5000
4000
3500
3000
2500
2000
1000
500
0
0.01
Figure 6a shows a voltage controlled LED drive circuit.
When VIN is at 0V, the op amp supply current is nominally
20μA. The offset, for example, could be 450µV, appears
across R1, inducing a 0.45mA current in the LED. Some
applications want a guaranteed zero LED current at
VIN = 0, and this is the purpose of R5. R5 forces 2.5μA
current through R7, creating a negative 0.6mV sense offset.
This offset guarantees a zero LED current.
0.1
1
10
FREQUENCY (kHz)
100
6258 F05b
Figure 5b. Noise Density, Reference Buffer
3.0
2.8
2.6
INPUT
NO 44µF OUTPUT CAP
ADD 44µF OUTPUT CAP
2.4
VOLTS (V)
Analog LED Control
* 2.7k + 22µF FILTER
1500
Figure 5c shows the time domain response of the reference buffer.
The total measured supply current consumption is 21µA.
OP AMP, 44µF CLOAD
OP AMP
FILTERED REFERENCE
REFERENCE OUTPUT
INSTRUMENT ONLY
4500
NOISE DENSITY (nVrms/rt(Hz))
This circuit takes advantage of the ability of the LTC6259 to
drive large capacitive loads. Use of a large output capacitor
attached to the LT6659 enables significant bypassing of
follow-on circuits that use the reference voltage. In total, the
combination of LT6656 and LTC6259, in this configuration,
develops a reference voltage, with low noise, at low power,
and with appreciably large available bypass capacitance.
2.2
2.0
1.8
1.6
1.4
1.2
1.0
200ms/Div
6258 F05c
Figure 5c. Reference Buffer Transient Response
6258960fa
For more information www.linear.com/LTC6258
17
LTC6258/LTC6259/LTC6260
APPLICATIONS INFORMATION
5V
D1
D
R5
2M
VIN
–
+
R2
97.6k
C1
100nF
R3
2.2k
LTC6258
R4
51Ω
C2
10nF
M1
2N7002
VG
R7
237Ω
R6
100k
R1
1Ω
6258 F06a
Figure 6a. Lower Power LED Driver with Voltage Command
100
MEASURED
CALCULATED
LED CURRENT (mA)
80
60
40
20
20 µA SUPPLY WHEN LED OFF
0
0
1
2
3
INPUT VOLTAGE (V)
4
5
6258 F06b
Figure 6b. LED Current
Indeed, the circuit works nicely. Once the input voltage is
near 0, the LED current output is 0 and the total supply
current is 20µA. Gain from the input voltage to LED current is 0.022A/V, as can be taken from the R2/R3 voltage
divider and the sense resistor value.
LED Current =
VIN
R3
•
R1 R2+R3
Self-Oscillating LED Driver
Taking the circuit of the above application a step further,
the circuit of Figure 7a combines edge detection with use
of the shutdown pin of the LTC6259. R2 and R3 bring in
a divided down copy of the supply voltage as a reference
into the positive terminal. The op amp forces this voltage
on the sense resistor RSENSE in “LED ON” operation. In
that sense this circuit is similar to the one above.
However, whereas the previous circuit assumes an
always-on operation mode, this new circuit hijacks the
shutdown pin. C2 can AC couple fast action signals into
the signal VC. Hence when the gate voltage VG increases
when “LED ON” begins, VC will suddenly rise. VC connects
to the shutdown pin; a rising edge on the shutdown pin
enables the LTC6259, which is already active, to stay on.
However, M3 is also on while M1 is on, and as a result
will work with R9 to charge C2 slowly until VC falls below
the shutdown threshold. At that moment, the active low
shutdown kicks in, and the LTC6259 turns off. A negative
falling VG voltage again feeds through C2, and a falling
VC and hence a falling shutdown pin voltage keeps the
circuit in an “LED OFF” state for some time. M3 turns off,
and C2 discharges until VC is high enough to reactivate
the LTC6259.
It may seem a bit odd to develop such a circuit when a
microprocessor or a LTC6992 can provide on-off capability in combination with a single MOSFET and resistor. The
problem with those circuits, however, is the lack of control
over the LED current. In the circuit of this application, a
voltage is controlled across a sense resistor. There is no
dependence on the LED voltage in how much current drives
the LED. And generation of the on-off, or blinking, comes
with the addition of only a handful of low cost components.
6258960fa
18
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
APPLICATIONS INFORMATION
5V
CF
470nF
R2
275k
R3
15k
–
+
C1
1nF
LED
U2
R4
51Ω
R7
470k
D
VG
LTC6258
RF
VC
100Ω
RGATE
10k
M1
2N7002
M3
2N7002
VG
R9
140k
C2
1µF
R8
1M
VC
R5
1M
RSENSE
10Ω
6258 F07a
The figure shows the sense resistor voltage (red) and the
shutdown pin voltage (blue). The shutdown voltage is
tied to VC; the gate drive couples through C2 as already
described.
300.0
4.0
240.0
3.0
180.0
2.0
120.0
1.0
0
60.0
–1.0
0
–60.0
50ms/Div
6258 F07b
SHUTDOWN PIN VOLTAGE (V)
It is interesting to note that the LED current depends on
the supply in this implementation in as much as the supply
feeds through R2 and R3 to create a reference. The supply
also figures into the time of the on and off cycle since the
supply powers the edge detection and relaxation part of
the circuitry. When the supply falls, the LED current drops
and the cycle time increases. This change of behavior
can help in battery powered LED blinking applications to
predict end of life.
SENSE RESISTOR VOLTAGE (mV)
Figure 7a. LED Driver with Self-Oscillation
–2.0
Figure 7b. LED Blinker Circuit
Components RF and CF may apparently slow edges down
greatly. Adding this much delay is not essential, but it can
help to smooth out any hiccups that occur when the part
goes through a startup sequence after the shutdown pin
goes inactive. 47µs as a time constant is insignificant in
the time scale of the blinking (10’s or 100’s of ms). The
47µs is much smaller than any time constant associated
with C2 and its resistors.
6258960fa
For more information www.linear.com/LTC6258
19
LTC6258/LTC6259/LTC6260
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTCLTC6258#packaging for the most recent package drawings.
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
0.62
MAX
2.90 BSC
(NOTE 4)
0.95
REF
1.22 REF
3.85 MAX 2.62 REF
1.4 MIN
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45
6 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
1.90 BSC
S6 TSOT-23 0302
6258960fa
20
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
TS8 Package
8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637 Rev A)
0.40
MAX
2.90 BSC
(NOTE 4)
0.65
REF
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.22 – 0.36
8 PLCS (NOTE 3)
0.65 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
1.95 BSC
TS8 TSOT-23 0710 REV A
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
6258960fa
For more information www.linear.com/LTC6258
21
LTC6258/LTC6259/LTC6260
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660 Rev G)
0.889 ±0.127
(.035 ±.005)
5.10
(.201)
MIN
3.20 – 3.45
(.126 – .136)
3.00 ±0.102
(.118 ±.004)
(NOTE 3)
0.65
(.0256)
BSC
0.42 ± 0.038
(.0165 ±.0015)
TYP
8
7 6 5
0.52
(.0205)
REF
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
3.00 ±0.102
(.118 ±.004)
(NOTE 4)
4.90 ±0.152
(.193 ±.006)
DETAIL “A”
0° – 6° TYP
GAUGE PLANE
0.53 ±0.152
(.021 ±.006)
DETAIL “A”
1
2 3
4
1.10
(.043)
MAX
0.86
(.034)
REF
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
BSC
0.1016 ±0.0508
(.004 ±.002)
MSOP (MS8) 0213 REV G
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
6258960fa
22
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661 Rev F)
0.889 ±0.127
(.035 ±.005)
5.10
(.201)
MIN
3.20 – 3.45
(.126 – .136)
3.00 ±0.102
(.118 ±.004)
(NOTE 3)
0.50
0.305 ±0.038
(.0197)
(.0120 ±.0015)
BSC
TYP
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
10 9 8 7 6
3.00 ±0.102
(.118 ±.004)
(NOTE 4)
4.90 ±0.152
(.193 ±.006)
DETAIL “A”
0.497 ±0.076
(.0196 ±.003)
REF
0° – 6° TYP
GAUGE PLANE
1 2 3 4 5
0.53 ±0.152
(.021 ±.006)
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.86
(.034)
REF
1.10
(.043)
MAX
0.17 – 0.27
(.007 – .011)
TYP
0.50
(.0197)
BSC
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.1016 ±0.0508
(.004 ±.002)
MSOP (MS) 0213 REV F
6258960fa
For more information www.linear.com/LTC6258
23
LTC6258/LTC6259/LTC6260
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6260#packaging for the most recent package drawings.
MS Package
16-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1669 Rev A)
0.889 ±0.127
(.035 ±.005)
5.10
(.201)
MIN
3.20 – 3.45
(.126 – .136)
4.039 ±0.102
(.159 ±.004)
(NOTE 3)
0.50
(.0197)
BSC
0.305 ±0.038
(.0120 ±.0015)
TYP
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
DETAIL “A”
3.00 ±0.102
(.118 ±.004)
(NOTE 4)
4.90 ±0.152
(.193 ±.006)
0° – 6° TYP
0.280 ±0.076
(.011 ±.003)
REF
16151413121110 9
GAUGE PLANE
0.53 ±0.152
(.021 ±.006)
DETAIL “A”
0.18
(.007)
SEATING
PLANE
1.10
(.043)
MAX
0.17 – 0.27
(.007 – .011)
TYP
1234567 8
0.50
(.0197)
BSC
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.86
(.034)
REF
0.1016 ±0.0508
(.004 ±.002)
MSOP (MS16) 0213 REV A
6258960fa
24
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6258#packaging for the most recent package drawings.
DC6 Package
6-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1703 Rev C)
0.70 ±0.05
2.55 ±0.05
1.15 ±0.05 0.60 ±0.10
(2 SIDES)
PACKAGE
OUTLINE
0.25 ±0.05
0.50 BSC
1.37 ±0.10
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
R = 0.125
TYP
0.60 ±0.10
(2 SIDES)
0.40 ±0.10
4
6
2.00 ±0.10
(4 SIDES)
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
PIN 1 NOTCH
R = 0.20 OR
0.25 × 45°
CHAMFER
R = 0.05
TYP
0.200 REF
0.75 ±0.05
3
(DC6) DFN REV C 0915
1
0.25 ±0.05
0.50 BSC
1.37 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WCCD-2)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
6258960fa
For more information www.linear.com/LTC6258
25
LTC6258/LTC6259/LTC6260
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
DC8 Package
8-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1719 Rev A)
0.70 ±0.05
2.55 ±0.05
1.15 ±0.05 0.64 ±0.05
(2 SIDES)
PACKAGE
OUTLINE
0.25 ±0.05
0.45 BSC
1.37 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
R = 0.05
TYP
2.00 ±0.10
(4 SIDES)
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
R = 0.115
TYP
5
8
0.40 ±0.10
0.64 ±0.10
(2 SIDES)
PIN 1 NOTCH
R = 0.20 OR
0.25 × 45°
CHAMFER
(DC8) DFN 0409 REVA
4
0.200 REF
1
0.23 ±0.05
0.45 BSC
0.75 ±0.05
1.37 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
6258960fa
26
For more information www.linear.com/LTC6258
LTC6258/LTC6259/LTC6260
REVISION HISTORY
REV
DATE
DESCRIPTION
A
04/17
Added SOT-23 package.
PAGE NUMBER
1, 2, 3, 20
6258960fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection
of its circuits
as described
herein will not infringe on existing patent rights.
For more
information
www.linear.com/LTC6258
27
LTC6258/LTC6259/LTC6260
TYPICAL APPLICATION
LED Driver with Self Oscillation
LED Blinker Current
R3
15k
–
+
C1
1nF
U2
R4
51Ω
R7
470k
D
VG
LTC6258
RF
VC
100Ω
RGATE
10k
M1
2N7002
M3
2N7002
VG
R9
140k
RSENSE
10Ω
C2
1µF
R8
1M
VC
R5
1M
6258 TA03
300.0
4.0
240.0
3.0
180.0
2.0
120.0
1.0
0
60.0
–1.0
0
–60.0
50ms/Div
6258 TA04
SHUTDOWN PIN VOLTAGE (V)
R2
275k
LED
SENSE RESISTOR VOLTAGE (mV)
5V
CF
470nF
–2.0
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC6255/LTC6256/ 6.5MHz, 65µA Power Efficient RR Op Amp
LTC6257
6.5MHz, 65µA, RR IN/OUT, 1.8V to 5.25V
LTC6261/LTC6262/ 30MHz, 240µA Power Efficient RR Op Amp
LTC6263
30MHz, 240µA, RR IN/OUT, 1.8V to 5.25V
LTC6246/LTC6247/ 180MHz, 1mA, Power Efficient Rail-to-Rail Op Amps
LTC6248
180MHz GBW, 1mA, 500μV VOS, RR In/Out, 2.5V to 5.25V, 90V/µs
Slew Rate
LT1498/LT1499
10MHz, 6V/µs, Dual/Quad,Rail-to-Rail Input and Output,
Precision C-Load Op Amps
10MHz GBW, 1.7mA, 475μV VOS, RR In/Out, 2.2V to ±15V, 10nF CLOAD
LTC6081/LTC6082
Precision Dual/Quad CMOS Rail-to-Rail Input/Output
Amplifiers
3.6MHz GBW, 330μA, 70μV VOS, RR In/Out, 2.7V to 5.5V, 100dB CMRR
LTC2050/LTC2051/ Zero-Drift Operational Amplifiers in SOT-23
LTC2052
3MHz GBW, 800μA, 3μV VOS, V– to V+ – 1V In, RR Out, 2.7V to 6V, 130dB
CMRR/PSRR
LTC1050/LTC1051/ Precision Zero-Drift, Operational Amplifierwith Internal
LTC1052
Capacitors
2.5MHz GBW, 1mA, 5μV VOS, V– to V+ – 2.3V In, RR Out, 4.75V to 16V,
120dB CMRR, 125dB PSRR
LTC6084/LTC6085
Dual/Quad 1.5MHz, Rail-to-Rail, CMOS Amplifiers
1.5MHz GBW, 110μA, 750μV VOS, RR In/Out, 2.5V to 5.5V
LT1783
1.25MHz, Over-The-Top® Micropower, Rail-to-Rail Input
and Output Op Amp in SOT-23
1.25MHz GBW, 300μA, 800μV VOS, RR In/Out, 2.5V to 18V
LT1637/LT1638/
LT1639
1.1MHz, 0.4V/μs Over-The-Top Micropower, Rail-to-Rail
Input and Output Op Amps
1.1MHz GBW, 250μA, 350μV VOS, RR In/Out, 2.7V to 44V, 110dB CMRR
LTC2054/LTC2055
Single/Dual Micropower Zero-Drift Operational Amplifiers
500kHz GBW, 150μA, 3μV VOS, V– to V+ – 0.5V In, RR Out, 2.7V to 6V
LT6010/LT6011/
LT6012
135μA, 14nV/√Hz, Rail-to-Rail Output Precision Op Amp
with Shutdown
330kHz GBW, 135μA, 35μV VOS, V– + 1.0V to V+ – 1.2V In, RR Out,
2.7V to 36V
LT1782
Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and 200kHz GBW, 55μA, 800μV VOS, RR In/Out, 2.5V to 18V
Output Op Amp
LT1636
Over-The-Top, Micropower Rail-to-Rail, Input and Output
Op Amp
200kHz GBW, 50μA, 225μV VOS, RR In/Out, 2.7V to 44V, –40°C to 125°C
LT1490A/LT1491A
Dual/Quad Over-The-Top, Micropower Rail-to-Rail Input
and Output Op Amps
200kHz GBW, 50μA, 500μV VOS, RR In/Out, 2V to 44V
LT2178/LT2179
17μA Max, Dual and Quad, Single Supply, Precision
Op Amps
85kHz GBW, 17μA, 70μV VOS, RR In/Out, 5V to 44V
LT6000/LT6001/
LT6002
Single, Dual and Quad, 1.8V, 13μA Precision Rail-to-Rail
Op Amps
50kHz GBW, 16μA , 600μV VOS(MAX), RR In/Out, 1.8V to 18V
6258960fa
28
LT 0417 REV A • PRINTED IN USA
www.linear.com/LTC6258
For more information www.linear.com/LTC6258
 LINEAR TECHNOLOGY CORPORATION 2017