ETC LT6202CS8

LT6202/LT6203/LT6204
Single/Dual/Quad 100MHz,
Rail-to-Rail Input and Output,
Ultralow 1.9nV√Hz Noise, Low Power Op Amps
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DESCRIPTIO
FEATURES
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The LT®6202/LT6203/LT6204 are single/dual/quad low
noise, rail-to-rail input and output unity gain stable op
amps that feature 1.9nV/√Hz noise voltage and draw only
2.5mA of supply current per amplifier. These amplifiers
combine very low noise and supply current with a 100MHz
gain bandwidth product, a 25V/µs slew rate, and are
optimized for low supply signal conditioning systems.
Low Noise Voltage: 1.9nV/√Hz (100kHz)
Low Supply Current: 3mA/Amp Max
Gain Bandwidth Product: 100MHz
Low Distortion: –80dB at 1MHz
Low Offset Voltage: 500µV Max
Wide Supply Range: 2.5V to 12.6V
Input Common Mode Range Includes Both Rails
Output Swings Rail-to-Rail
Common Mode Rejection Ratio 90dB Typ
Unity Gain Stable
Low Noise Current: 1.1pA/√Hz
Output Current: 30mA Min
Single in SOT-23, Dual in MSOP,
Quad in SSOP Package
Operating Temperature Range –40°C to 85°C
The LT/6202/LT6203/LT6204 have an input range that
includes both supply rails and an output that swings within
30mV of either supply rail to maximize the signal dynamic
range in low supply applications. These amplifiers maintain their performance for supplies from 2.5V to 12.6V and
are specified at 3V, 5V and ±5V supplies. Harmonic
distortion is less than – 80dBc at 1MHz making these
amplifiers suitable in low power data acquisition systems.
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APPLICATIO S
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Low Noise, Low Power Signal Processing
Active Filters
Rail-to-Rail Buffer Amplifiers
Driving A/D Converters
DSL Receivers
Battery Powered/Battery Backed Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
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The LT6202 is available in the 5-pin SOT-23 and the 8-pin
SO, while the LT6203 comes in 8-pin SO and MSOP
packages with standard op amp pinouts. For compact
layouts the quad LT6204 is available in the 16-pin SSOP
and 14-pin SO packages. These devices can be used as
plug-in replacements for many op amps to improve input/
output range and noise performance.
TYPICAL APPLICATIO
Low Noise 4- to 2-Wire Local Echo Cancellation Differential Receiver
Line Receiver Integrated Noise 25kHz to 150kHz
5.0
–
4.5
1/2 LT1739
+
1k
50Ω
1k
–
1/2 LT6203
1:1
VD
LINE
DRIVER
VL
100Ω
LINE
•
+
•
VR
LINE
RECEIVER
+
1/2 LT1739
–
1k
3.5
3.0
2.5
2.0
1.5
1.0
0
–
50Ω
4.0
0.5
1/2 LT6203
+
INTEGRATED NOISE (µVRMS)
2k
0
1k
20
40
60 80 100 120 140 160
BANDWIDTH (kHz)
6203 • TA01b
2k
6203 TA01a
620234f
1
LT6202/LT6203/LT6204
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W W
W
ABSOLUTE
AXI U RATI GS (Note 1)
Total Supply Voltage (V+ to V–) ............................ 12.6V
Input Current (Note 2) ........................................ ±40mA
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 4) ...–40°C to 85°C
Specified Temperature Range (Note 5) ....–40°C to 85°C
Junction Temperature ........................................... 150°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
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W
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PACKAGE/ORDER I FOR ATIO
–
+
MS8 PACKAGE
8-LEAD PLASTIC MSOP
+
8 V
OUT A 1
–IN A 2
+IN A 3
V
–
TJMAX = 150°C, θJA = 250°C/W
7 OUT B
–
+
–
S5 PACKAGE
5-LEAD PLASTIC SOT-23
7 OUT B
6 –IN B
5 +IN B
–
+
4 –IN
+IN 3
1
2
3
4
–
V– 2
OUT A
–IN A
+IN A
V–
8 V+
+
5 V+
OUT 1
+
TOP VIEW
TOP VIEW
TOP VIEW
4
6 –IN B
5 +IN B
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 250°C/W
TJMAX = 150°C, θJA = 190°C/W
ORDER PART
NUMBER
S5 PART
MARKING*
ORDER PART
NUMBER
MS8 PART
MARKING
ORDER PART
NUMBER
S8 PART
MARKING
LT6202CS5
LT6202IS5
LTG6
LT6203CMS8
LT6203IMS8
LTB2
LTB3
LT6203CS8
LT6203IS8
6203
6203I
V–
4
–
+
7
V+
–IN A
2
6
OUT
+IN A
3
5
NC
OUT A
V
+
+IN B
14 OUT D
OUT A 1
–
+IN 3
NC
13 –IN D
–IN A 2
+
–IN 2
8
12 +IN D
+IN A 3
1
–
+
A
D
11 V
4
5
S8 PACKAGE
8-LEAD PLASTIC SO
–IN B
6
TJMAX = 150°C, θJA = 190°C/W
OUT B
7
+
–B
+
C–
–
+
V
+IN B 5
9 –IN C
–IN B 6
8 OUT C
OUT B 7
TJMAX = 150°C, θJA = 150°C/W
–
+
A
OUT D
15 –IN D
14 +IN D
D
4
10 +IN C
S PACKAGE
14-LEAD PLASTIC SO
16
–
NC 1
TOP VIEW
TOP VIEW
+
TOP VIEW
13 V
+
–B
NC 8
+
C–
–
12 +IN C
11 –IN C
10 OUT C
9
NC
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
TJMAX = 150°C, θJA = 135°C/W
ORDER PART
NUMBER
S8 PART
MARKING
ORDER PART
NUMBER
ORDER PART
NUMBER
GN PART
MARKING
LT6202CS8
LT6202IS8
6202
6202I
LT6204CS
LT6204IS
LT6204CGN
LT6204IGN
6204
6204I
*The temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
620234f
2
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
unless otherwise noted.
TA = 25°C, VS =5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply,
SYMBOL
PARAMETER
CONDITIONS
TYP
MAX
UNITS
VOS
Input Offset Voltage
VS = 5V, 0V, VCM = Half Supply
LT6203, LT6204, LT6202S8
LT6202 SOT-23
0.1
0.1
0.5
0.7
mV
mV
VS = 3V, 0V, VCM = Half Supply
LT6203, LT6204, LT6202S8
LT6202 SOT-23
0.6
0.6
1.5
1.7
mV
mV
VS = 5V, 0V, VCM = V + to V –
LT6203, LT6204, LT6202S8
LT6202 SOT-23
0.25
0.25
2.0
2.2
mV
mV
VS = 3V, 0V, VCM = V + to V –
LT6203, LT6204, LT6202S8
LT6202 SOT-23
1.0
1.0
3.5
3.7
mV
mV
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
VCM = Half Supply
VCM = V– to V+
0.15
0.3
0.8
1.8
mV
mV
Input Bias Current
VCM = Half Supply
VCM = V+
VCM = V –
–1.3
1.3
–3.3
2.5
µA
µA
µA
4.7
11.3
µA
0.1
0.6
µA
1
1
1.1
µA
µA
µA
IB
∆IB
IB Shift
VCM
MIN
–7.0
–8.8
= V – to V+
IB Match (Channel-to-Channel) (Note 6)
IOS
Input Offset Current
VCM = Half Supply
VCM = V+
VCM = V –
0.12
0.07
0.12
Input Noise Voltage
0.1Hz to 10Hz
800
Input Noise Voltage Density
f = 100kHz, VS = 5V
f = 10kHz, VS = 5V
2
2.9
Input Noise Current Density, Balanced
Input Noise Current Density, Unbalanced
f = 10kHz, VS = 5V
0.75
1.1
Input Resistance
Common Mode
Differential Mode
4
12
MΩ
kΩ
CIN
Input Capacitance
Common Mode
Differential Mode
1.8
1.5
pF
pF
AVOL
Large Signal Gain
VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2
VS = 5V, VO = 1V to 4V, RL = 100 to VS/2
VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2
40
8.0
17
70
14
40
V/mV
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VS = 5V, VCM = V – to V+
VS = 5V, VCM = 1.5V to 3.5V
VS = 3V, VCM = V – to V+
60
80
56
83
100
80
dB
dB
dB
en
in
PSRR
4.5
nV/√Hz
nV/√Hz
pA/√Hz
pA/√Hz
CMRR Match (Channel-to-Channel)(Note 6)
VS = 5V, VCM = 1.5V to 3.5V
85
120
dB
Power Supply Rejection Ratio
VS = 2.5V to 10V, VCM = 0V
60
74
dB
PSRR Match (Channel-to-Channel) (Note 6)
VS = 2.5V to 10V, VCM = 0V
70
100
dB
Minimum Supply Voltage (Note 7)
VOL
nVP-P
Output Voltage Swing LOW Saturation
(Note 8)
2.5
No Load
ISINK = 5mA
VS = 5V, ISINK = 20mA
VS = 3V, ISINK = 15mA
V
5
85
240
185
30
190
460
350
mV
mV
mV
mV
620234f
3
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
unless otherwise noted.
TA = 25°C, VS =5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply,
SYMBOL
PARAMETER
CONDITIONS
VOH
Output Voltage Swing HIGH Saturation
(Note 8)
No Load
ISOURCE = 5mA
VS = 5V, ISOURCE = 20mA
VS = 3V, ISOURCE = 15mA
MIN
ISC
Short-Circuit Current
VS = 5V
VS = 3V
IS
Supply Current per Amp
VS = 5V
VS = 3V
2.5
2.3
GBW
Gain Bandwidth Product
Frequency = 1MHz, VS = 5V
90
SR
Slew Rate
VS = 5V, AV = –1, RL = 1k, VO = 4V
17
24
V/µs
FPBW
Full Power Bandwidth (Note 10)
VS = 5V, VOUT = 3VP-P
1.8
2.5
MHz
tS
Settling Time
0.1%, VS = 5V, VSTEP = 2V, AV = –1, RL = 1k
85
ns
±30
±25
TYP
MAX
UNITS
25
90
325
225
75
210
600
410
mV
mV
mV
mV
±45
±40
mA
mA
3.0
2.85
mA
mA
MHz
The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V;
VCM = VOUT = half supply, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
VS = 5V, 0V, VCM = Half Supply
LT6203, LT6204, LT6202S8
LT6202 SOT-23
VOS TC
IB
∆IB
TYP
MAX
●
●
0.2
0.2
0.7
0.9
mV
mV
VS = 3V, 0V, VCM = Half Supply
LT6203, LT6204, LT6202S8
LT6202 SOT-23
●
●
0.6
0.6
1.7
1.9
mV
mV
VS = 5V, 0V, VCM = V + to V –
LT6203, LT6204, LT6202S8
LT6202 SOT-23
●
●
0.7
0.7
2.5
2.7
mV
mV
VS = 3V, 0V, VCM = V + to V –
LT6203, LT6204, LT6202S8
LT6202 SOT-23
●
●
1.2
1.2
4.0
4.2
mV
mV
Input Offset Voltage Drift (Note 9)
VCM = Half Supply
●
3.0
9.0
µV/°C
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
VCM = Half Supply
VCM = V – to V +
●
●
0.15
0.5
0.9
2.3
mV
mV
Input Bias Current
VCM = Half Supply
VCM = V +
VCM = V –
●
●
●
–1.3
1.3
–3.3
2.5
µA
µA
µA
●
4.7
11.3
µA
●
0.1
0.6
µA
0.15
0.10
0.15
1
1
1.1
µA
µA
µA
IB Shift
VCM
= V – to V +
IB Match (Channel-to-Channel) (Note 6)
MIN
–7.0
–8.8
UNITS
IOS
Input Offset Current
VCM = Half Supply
VCM = V +
VCM = V –
●
●
●
AVOL
Large Signal Gain
VS = 5V, VO = 0.5V to 4.5V,RL = 1k to VS /2
VS = 5V, VO = 1.5V to 3.5V,RL = 100 to VS /2
VS = 3V, VO = 0.5V to 2.5V,RL = 1k to VS /2
●
●
●
35
6.0
15
60
12
36
V/mV
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VS = 5V, VCM = V – to V +
VS = 5V, VCM = 1.5V to 3.5V
VS = 3V, VCM = V – to V +
●
●
●
60
78
56
83
97
75
dB
dB
dB
CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, VCM = 1.5V to 3.5V
●
83
100
dB
620234f
4
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over 0°C < TA < 70°C
temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
PSRR
Power Supply Rejection Ratio
VS = 3V to 10V, VCM = 0V
●
60
70
dB
PSRR Match (Channel-to-Channel)(Note 6)
VS = 3V to 10V, VCM = 0V
●
70
100
dB
●
3.0
Minimum Supply Voltage (Note 7)
MAX
UNITS
V
VOL
Output Voltage Swing LOW Saturation
(Note 8)
No Load
ISINK = 5mA
ISINK = 15mA
●
●
●
5.0
95
260
35
200
365
mV
mV
mV
VOH
Output Voltage Swing HIGH Saturation
(Note 8)
No Load
ISOURCE = 5mA
VS = 5V, ISOURCE = 20mA
VS = 3V, ISOURCE = 15mA
●
●
●
●
50
115
360
260
100
230
635
430
mV
mV
mV
mV
ISC
Short-Circuit Current
VS = 5V
VS = 3V
●
●
IS
Supply Current per Amp
VS = 5V
VS = 3V
●
●
3.1
2.75
GBW
Gain Bandwidth Product
Frequency = 1MHz
●
87
SR
Slew Rate
VS = 5V, AV = –1, RL = 1k, VO = 4V
●
15
21
V/µs
FPBW
Full Power Bandwidth (Note 10)
VS = 5V, VOUT = 3VP-P
●
1.6
2.2
MHz
±20
±20
±33
±30
mA
mA
3.85
3.50
mA
mA
MHz
The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half
supply, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
VS = 5V, 0V, VCM = Half Supply
LT6203, LT6204, LT6202S8
LT6202 SOT-23
VOS TC
IB
∆IB
TYP
MAX
●
●
0.2
0.2
0.8
1.0
mV
mV
VS = 3V, 0V, VCM = Half Supply
LT6203, LT6204, LT6202S8
LT6202 SOT-23
●
●
0.6
0.6
2.0
2.2
mV
mV
VS = 5V, 0V, VCM = V + to V –
LT6203, LT6204, LT6202S8
LT6202 SOT-23
●
●
1.0
1.0
3.0
3.5
mV
mV
VS = 3V, 0V, VCM = V + to V –
LT6203, LT6204, LT6202S8
LT6202 SOT-23
●
●
1.4
1.4
4.5
4.7
mV
mV
Input Offset Voltage Drift (Note 9)
VCM = Half Supply
●
3.0
9.0
µV/°C
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
VCM = Half Supply
VCM = V – to V+
●
●
0.3
0.7
1.0
2.5
mV
mV
Input Bias Current
VCM = Half Supply
VCM = V+
VCM = V –
●
●
●
–1.3
1.3
–3.3
2.5
µA
µA
µA
●
4.7
11.3
µA
●
0.1
0.6
µA
●
●
●
0.2
0.2
0.2
1
1.1
1.2
µA
µA
µA
IB Shift
VCM
= V – to V+
IB Match (Channel-to-Channel) (Note 6)
IOS
Input Offset Current
VCM = Half Supply
VCM = V+
VCM = V –
MIN
–7.0
–8.8
UNITS
620234f
5
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over –40°C < TA < 85°C
temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
AVOL
Large Signal Gain
VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS /2
VS = 5V, VO = 1.5V to 3.5V, RL = 100 to VS /2
VS = 3V, VO = 0.5V to 2.5V,RL = 1k to VS /2
●
●
●
32
4.0
13
60
10
32
V/mV
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VS = 5V, VCM = V – to V+
VS = 5V, VCM = 1.5V to 3.5V
VS = 3V, VCM = V – to V+
●
●
●
60
75
56
80
95
75
dB
dB
dB
CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, VCM = 1.5V to 3.5V
●
80
100
dB
Power Supply Rejection Ratio
VS = 3V to 10V, VCM = 0V
●
60
70
dB
PSRR Match (Channel-to-Channel) (Note 6) VS = 3V to 10V, VCM = 0V
●
70
100
dB
Minimum Supply Voltage (Note 7)
●
3.0
PSRR
MAX
UNITS
V
VOL
Output Voltage Swing LOW Saturation
(Note 8)
No Load
ISINK = 5mA
ISINK = 15mA
●
●
●
6
95
210
35
210
400
mV
mV
mV
VOH
Output Voltage Swing HIGH Saturation
(Note 8)
No Load
ISOURCE = 5mA
VS = 5V, ISOURCE = 20mA
VS = 3V, ISOURCE = 15mA
●
●
●
●
55
125
370
270
110
240
650
450
mV
mV
mV
mV
ISC
Short-Circuit Current
VS = 5V
VS = 3V
●
●
IS
Supply Current per Amp
VS = 5V
VS = 3V
●
●
3.3
3.0
GBW
Gain Bandwidth Product
Frequency = 1MHz
●
83
SR
Slew Rate
VS = 5V, AV = –1, RL = 1k, VO = 4V
●
12
17
V/µs
FPBW
Full Power Bandwidth (Note 10)
VS = 5V, VOUT = 3VP-P
●
1.3
1.8
MHz
MIN
±15
±15
±25
±23
mA
mA
4.1
3.65
mA
mA
MHz
TA = 25°C, VS = ±5V; VCM = VOUT = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
TYP
MAX
VOS
Input Offset Voltage
LT6203, LT6204, LT6202S8
VCM = 0V
VCM = V+
VCM = V –
1.0
2.6
2.3
2.5
5.5
5.0
mV
mV
mV
LT6202 SOT-23
VCM = 0V
VCM = V+
VCM = V –
1.0
2.6
2.3
2.7
6.0
5.5
mV
mV
mV
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
VCM = 0V
VCM = V – to V+
0.2
0.4
1.0
2.0
mV
mV
Input Bias Current
VCM = Half Supply
VCM = V+
VCM = V –
–1.3
1.3
–3.8
3.0
µA
µA
µA
5.3
12.5
µA
0.1
0.6
µA
0.15
0.2
0.35
1
1.2
1.3
µA
µA
µA
IB
∆IB
IB Shift
VCM
= V – to V+
IB Match(Channel-to-Channel) (Note 6)
IOS
Input Offset Current
VCM = Half Supply
VCM = V+
VCM = V –
–7.0
–9.5
UNITS
620234f
6
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
TA = 25°C, VS = ±5V; VCM = VOUT = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
Input Noise Voltage
0.1Hz to 10Hz
800
Input Noise Voltage Density
f = 100kHz
f = 10kHz
1.9
2.8
Input Noise Current Density, Balanced
Input Noise Current Density, Unbalanced
f = 10kHz
0.75
1.1
Input Resistance
Common Mode
Differential Mode
4
12
MΩ
kΩ
CIN
Input Capacitance
Common Mode
Differential Mode
1.8
1.5
pF
pF
AVOL
Large Signal Gain
VO = ±4.5V, RL = 1k
VO = ±2.5V, RL = 100
75
11
130
19
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VCM = V – to V+
VCM = –2V to 2V
65
85
85
98
dB
dB
CMRR Match (Channel-to-Channel)(Note 6)
VCM = –2V to 2V
85
120
dB
en
in
MIN
TYP
MAX
UNITS
nVP-P
4.5
nV/√Hz
nV/√Hz
pA/√Hz
pA/√Hz
Power Supply Rejection Ratio
VS = ±1.25V to ±5V
60
74
dB
PSRR Match (Channel-to-Channel)(Note 6)
VS = ±1.25V to ±5V
70
100
dB
VOL
Output Voltage Swing LOW Saturation
(Note 8)
No Load
ISINK = 5mA
ISINK = 20mA
5
87
245
30
190
460
mV
mV
mV
VOH
Output Voltage Swing HIGH Saturation
(Note 8)
No Load
ISOURCE = 5mA
ISOURCE = 20mA
40
95
320
95
210
600
mV
mV
mV
ISC
Short-Circuit Current
IS
Supply Current per Amp
PSRR
±30
±40
2.8
mA
3.5
mA
GBW
Gain Bandwidth Product
Frequency = 1MHz
70
100
MHz
SR
Slew Rate
AV = –1, RL = 1k, VO = 4V
18
25
V/µs
FPBW
Full Power Bandwidth (Note 10)
VOUT = 3VP-P
1.9
2.6
MHz
tS
Settling Time
0.1%, VSTEP = 2V, AV = –1, RL = 1k
78
ns
dG
Differential Gain (Note 11)
AV = 2, RF = RG = 499Ω, RL = 2k
0.05
%
dP
Differential Phase (Note 11)
AV = 2, RF = RG = 499Ω, RL = 2k
0.03
DEG
The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = ±5V; VCM = VOUT = 0V, unless otherwise
noted.
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT6203, LT6204, LT6202S8
VCM = 0V
VCM = V+
VCM = V –
LT6202 SOT-23
VCM = 0V
VCM = V+
VCM = V –
MIN
TYP
MAX
UNITS
●
●
●
1.6
3.2
2.8
2.8
6.8
5.8
mV
mV
mV
●
●
●
1.6
3.2
2.8
3.0
7.3
6.3
mV
mV
mV
620234f
7
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over 0°C < TA < 70°C
temperature range. VS = ±5V; VCM = VOUT = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
TYP
MAX
UNITS
VOS TC
Input Offset Voltage Drift (Note 9)
VCM = Half Supply
●
7.5
24
µV/°C
Input Offset Voltage Match
(Channel-to-Channel)(Note 6)
VCM = 0V
VCM = V – to V+
●
●
0.2
0.5
1.0
2.2
mV
mV
Input Bias Current
VCM = Half Supply
VCM = V+
VCM = V –
●
●
●
–1.4
1.8
–4.3
3.6
µA
µA
µA
VCM = V – to V+
●
5.4
13
µA
●
0.15
0.7
µA
0.1
0.2
0.4
1
1.2
1.4
µA
µA
µA
IB
∆IB
IB Shift
IB match (Channel-to-Channel) (Note 6)
MIN
–7.0
–10
IOS
Input Offset Current
VCM = Half Supply
VCM = V+
VCM = V –
●
●
●
AVOL
Large Signal Gain
VO = ±4.5V, RL = 1k
VO = ±2V, RL = 100
●
●
70
10
120
18
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VCM = V – to V+
VCM = –2V to 2V
●
●
65
83
84
95
dB
dB
CMRR Match (Channel-to-Channel) (Note 6)
VCM = –2V to 2V
●
83
110
dB
Power Supply Rejection Ratio
VS = ±1.5V to ±5V
●
60
70
dB
PSRR Match (Channel-to-Channel)(Note 6)
VS = ±1.5V to ±5V
●
70
100
dB
VOL
Output Voltage Swing LOW Saturation
(Note 8)
No Load
ISINK = 5mA
ISINK = 15mA
●
●
●
6
95
210
30
200
400
mV
mV
mV
VOH
Output Voltage Swing HIGH Saturation
(Note 8)
No Load
ISOURCE = 5mA
ISOURCE = 20mA
●
●
●
65
125
350
120
240
625
mV
mV
mV
ISC
Short-Circuit Current
PSRR
●
±25
±34
mA
IS
Supply Current per Amp
●
3.5
GBW
Gain Bandwidth Product
Frequency = 1MHz
●
95
4.3
MHz
mA
SR
Slew Rate
AV = –1, RL = 1k, VO = 4V
●
16
22
V/µs
FPBW
Full Power Bandwidth (Note 10)
VOUT = 3VP-P
●
1.7
2.3
MHz
The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = ±5V; VCM = VOUT = 0V, unless otherwise
noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT6203, LT6204, LT6202S8
VCM = 0V
VCM = V+
VCM = V –
VOS TC
MIN
TYP
MAX
UNITS
●
●
●
1.7
3.8
3.5
3.0
7.5
6.6
mV
mV
mV
LT6202 SOT-23
VCM = 0V
VCM = V+
VCM = V –
●
●
●
1.7
3.8
3.5
3.2
7.7
6.7
mV
mV
mV
Input Offset Voltage Drift (Note 9)
VCM = Half Supply
●
7.5
24
µV/°C
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
VCM = 0V
VCM = V – to V+
●
●
0.3
0.6
1.0
2.5
mV
mV
620234f
8
LT6202/LT6203/LT6204
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over –40°C < TA < 85°C
temperature range. VS = ±5V; VCM = VOUT = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
IB
Input Bias Current
VCM = Half Supply
VCM = V+
VCM = V –
●
●
●
VCM = V – to V+
∆IB
IB Shift
IB Match (Channel-to-Channel) (Note 6)
MIN
TYP
MAX
–7.0
–1.4
1.8
–4.5
3.6
µA
µA
µA
●
5.4
13
µA
●
0.15
0.7
µA
0.15
0.3
0.5
1
1.2
1.6
µA
µA
µA
–10
UNITS
IOS
Input Offset Current
VCM = Half Supply
VCM = V+
VCM = V –
●
●
●
AVOL
Large Signal Gain
VO = ±4.5V, RL = 1k
VO = ±2V RL = 100
●
●
60
6.0
110
13
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VCM = V – to V+
VCM = –2V to 2V
●
●
65
80
84
95
dB
dB
CMRR Match (Channel-to-Channel) (Note 6)
VCM = –2V to 2V
●
80
110
dB
Power Supply Rejection Ratio
VS = ±1.5V to ±5V
●
60
70
dB
PSRR Match (Channel-to-Channel)(Note 6)
VS = ±1.5V to ±5V
●
70
100
dB
VOL
Output Voltage Swing LOW Saturation
(Note 8)
No Load
ISINK = 5mA
ISINK = 15mA
●
●
●
7
98
260
32
205
500
mV
mV
mV
VOH
Output Voltage Swing HIGH Saturation
(Note 8)
No Load
ISOURCE = 5mA
ISOURCE = 20mA
●
●
●
70
130
360
130
250
640
mV
mV
mV
ISC
Short-Circuit Current
PSRR
●
±15
±25
mA
IS
Supply Current per Amp
●
3.8
GBW
Gain Bandwidth Product
Frequency = 1MHz
●
90
MHz
SR
Slew Rate
AV = –1, RL = 1k, VO = 4V
●
13
18
V/µs
FPBW
Full Power Bandwidth (Note 10)
VOUT = 3VP-P
●
1.4
1.9
MHz
Note 1: Absolute maximum ratings are those values beyond which the life
of the device may be impaired.
Note 2: Inputs are protected by back-to-back diodes and diodes to each
supply. If the inputs are taken beyond the supplies or the differential input
voltage exceeds 0.7V, the input current must be limited to less than 40mA.
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: The LT6202C/LT6202I, LT6203C/LT6203I and LT6204C/LT6204I
are guaranteed functional over the temperature range of –40°C and 85°C.
Note 5: The LT6202C/LT6203C/LT6204C are guaranteed to meet specified
performance from 0°C to 70°C. The LT6202C/LT6203C/LT6204C are
designed, characterized and expected to meet specified performance from
–40°C to 85°C, but are not tested or QA sampled at these temperatures.
The LT6202I/LT6203I/LT6204I are guaranteed to meet specified
performance from –40°C to 85°C.
4.5
mA
Note 6: Matching parameters are the difference between the two amplifiers
A and D and between B and C of the LT6204; between the two amplifiers
of the LT6203. CMRR and PSRR match are defined as follows: CMRR and
PSRR are measured in µV/V on the identical amplifiers. The difference is
calculated between the matching sides in µV/V. The result is converted to
dB.
Note 7: Minimum supply voltage is guaranteed by power supply rejection
ratio test.
Note 8: Output voltage swings are measured between the output and
power supply rails.
Note 9: This parameter is not 100% tested.
Note 10: Full-power bandwidth is calculated from the slew rate:
FPBW = SR/2πVP
Note 11: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Measurement Set. The resolution of this equipment is 0.1% and 0.1°. Ten
identical amplifier stages were cascaded giving an effective resolution of
0.01% and 0.01°.
620234f
9
LT6202/LT6203/LT6204
U W
TYPICAL PERFOR A CE CHARACTERISTICS
VOS Distribution, VCM = V+
VOS Distribution, VCM = 0V
45
40
60
VS = 5V, 0V
S8
VOS Distribution, VCM = V–
60
VS = 5V, 0V
S8
50
VS = 5V, 0V
S8
50
30
25
20
15
NUMBER OF UNITS
NUMBER OF UNITS
NUMBER OF UNITS
35
40
30
20
40
30
20
10
10
10
5
0
–250
–150
–50 0 50
150
INPUT OFFSET VOLTAGE (µV)
LT6202/03/04 G01
Offset Voltage vs Input
Common Mode Voltage
12
TA = 125°C
4
TA = –55°C
1.0
TA = 125°C
0.5
TA = 25°C
0
2
–0.5
0
–1.0
2
8
12
6
10
4
TOTAL SUPPLY VOLTAGE (V)
14
TA = –55°C
3
5
2
4
0
1
INPUT COMMON MODE VOLTAGE (V)
–1
10
OUTPUT SATURATION VOLTAGE (V)
0
–1
–2
–3
VCM = 0V
–4
–5
–6
–50 –35 –20 –5 10 25 40 55
TEMPERATURE (°C)
70
85
LT6202/03/04 G07
TA = –55°C
–4
TA = 25°C
TA = 125°C
6
–1
0
4
5
1
2
3
COMMON MODE VOLTAGE (V)
Output Saturation Voltage vs
Load Current (Output High)
10
VS = 5V, 0V
1
TA = 125°C
0.1
TA = 25°C
0.01
0.001
0.01
TA = –55°C
1
10
0.1
LOAD CURRENT (mA)
6
LT6202/03/04 G06
Output Saturation Voltage vs
Load Current (Output Low)
VS = 5V, 0V
1
–2
LT6202/03/04 G05
Input Bias Current vs Temperature
VCM = 5V
0
–6
LT6202/03/04 G04
2
VS = 5V, 0V
VS = 5V, 0V
TYPICAL PART
OUTPUT SATURATION VOLTAGE (V)
TA = 25°C
INPUT BIAS CURRENT (µA)
OFFSET VOLTAGE (mV)
SUPPLY CURRENT (mA)
6
2
1.5
8
0
INPUT BIAS CURRENT (µA)
Input Bias Current vs
Common Mode Voltage
2.0
10
3
LT6202/03/04 G03
LT6202/03/04 G02
Supply Current vs Supply Voltage
(Both Amplifiers)
4
0
–800 –600 –400 –200 0 200 400 600 800
INPUT OFFSET VOLTAGE (µV)
0
–800–600 –400 –200 0 200 400 600 800 1000
INPUT OFFSET VOLTAGE (µV)
250
100
LT6202/03/04 G08
VS = 5V, 0V
1
TA = 125°C
TA = 25°C
0.1
0.01
0.001
0.01
TA = –55°C
1
10
0.1
LOAD CURRENT (mA)
100
LT6202/03/04 G09
620234f
10
LT6202/LT6203/LT6204
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Output Short-Circuit Current vs
Power Supply Voltage
Minimum Supply Voltage
10
4
TA = 125°C
2
TA = 25°C
0
–2
–4
TA = –55°C
–6
–8
1.5
2 2.5 3 3.5 4 4.5
TOTAL SUPPLY VOLTAGE (V)
1.5
40
TA = 25°C
20
TA = –55°C
0
SINKING
TA = –55°C
–20
TA = 25°C
–40
–60
5
VS = 5V, 0V
TA = 25°C
4
4.5
3.5
3
POWER SUPPLY VOLTAGE (±V)
0
15
VS = ±5V
TA = 25°C
RL = 1k
–0.5
RL = 100Ω
–1.0
1.0
0.5
RL = 100Ω
–1.0
–1.5
–1.5
–2.0
–2.0
–2.5
RL = 1k
0
–0.5
1
2
3
OUTPUT VOLTAGE (V)
4
5
–5 –4 –3 –2 –1 0 1 2 3
OUTPUT VOLTAGE (V)
LT6202/03/04 G13
100
TOTAL NOISE VOLTAGE (nV/√Hz)
VS = ±5V
120
100
80
60
VS = ±2.5V
40
VS = ±1.5V
20
0
20
40 60 80 100 120 140 160
TIME AFTER POWER-UP (s)
LT6202/03/04 G16
TA = 125°C
5
0
TA = 25°C
–5
TA = –55°C
4
–15
20 40
–80 –60 –40 –20 0
OUTPUT CURRENT (mA)
5
VS = ±2.5V
VCM = 0V
f = 100kHz
Input NoiseVoltage vs Frequency
45
TOTAL SPOT NOISE
40
10
AMPLIFIER SPOT
NOISE VOLTAGE
1
RESISTOR
SPOT
NOISE
100k
LT6202/03/04 G17
VS = 5V, 0V
TA = 25°C
PNP ACTIVE
VCM = 0.5V
30
25
20
15
10
0
100
1k
10k
TOTAL SOURCE RESISTANCE (Ω)
NPN ACTIVE
VCM = 4.5V
35
5
0.1
10
80
60
LT6202/03/04 G15
Total Noise vs
Total Source Resistance
TA = 25°C
140
VS = ±5V
LT6202/03/04 G14
Warm-Up Drift vs Time
(LT6203S8)
160
3.0
–10
–2.5
0
2.5
1.5
2.0
1.0
OUTPUT VOLTAGE (V)
10
OFFSET VOLTAGE (mV)
1.0
0.5
LT6202/03/04 G12
1.5
INPUT VOLTAGE (mV)
INPUT VOLTAGE (mV)
5
Offset Voltage vs Output Current
2.0
0
RL = 100Ω
Open-Loop Gain
1.5
CHANGE IN OFFSET VOLTAGE (µV)
–0.5
–1.0
–1.5
2.5
2.5
0.5
RL = 1k
0
LT6202/03/04 G11
Open-Loop Gain
2.0
0.5
–2.5
2
LT6202/03/04 G10
2.5
1.0
–2.0
TA = 125°C
–80
1.5
–10
1
60
VS = 3V, 0V
TA = 25°C
2.0
TA = 125°C
NOISE VOLTAGE (nV√Hz)
CHANGE IN OFFSET VOLTAGE (mV)
6
2.5
SOURCING
INPUT VOLTAGE (mV)
OUTPUT SHORT-CIRCUIT CURRENT (mA)
80
8
0
Open-Loop Gain
BOTH ACTIVE
VCM = 2.5V
10
100
1k
10k
FREQUENCY (Hz)
100k
LT6202/03/04 G18
620234f
11
LT6202/LT6203/LT6204
U W
TYPICAL PERFOR A CE CHARACTERISTICS
12
BALANCED SOURCE
RESISTANCE
VS = 5V, 0V
TA = 25°C
6
5
UNBALANCED NOISE CURRENT (pA/√Hz)
PNP ACTIVE
VCM = 0.5V
4
3
BOTH ACTIVE
VCM = 2.5V
2
NPN ACTIVE
VCM = 4.5V
1
1000
PNP ACTIVE
VCM = 0.5V
8
6
BOTH ACTIVE
VCM = 2.5V NPN ACTIVE
VCM = 4.5V
4
2
1k
10k
FREQUENCY (Hz)
100k
100
1k
10k
FREQUENCY (Hz)
LT6202/03/04 G19
70
PHASE MARGIN
100
TIME (2s/DIV)
LT6202/03/04 G20
VS = 3V, 0V
80
70
100
70
80
60
60
50
PHASE
VS = ±5V
VS = 3V, 0V
50
40
40
30
20
CL = 5pF
RL = 1k
VCM = 0V
–10
40
–55
–20
100k
10M
100M
FREQUENCY (Hz)
70
80
60
60
50
80
PHASE MARGIN (DEG)
70
SLEW RATE (V/µs)
PHASE MARGIN
100
0
20
GAIN
VCM = 4.5V
VS = 5V, 0V
–10 CL = 5pF
RL = 1k
–20
1M
100k
–40
–60
40
VS = ±5V
30
FALLING
20
–80
1G
10M
100M
FREQUENCY (Hz)
VS = 5V, 0V
RISING
VS = ±2.5V
50
–20
Output Impedance vs Frequency
1000
AV = –1
RF = RG = 1k
RL = 1k
0
VCM = 0.5V
LT6202/03/04 G23
Slew Rate vs Temperature
90
60
40
LT6202/03/04 G22
Gain Bandwidth and Phase Margin
vs Supply Voltage
80
VCM = 0.5V
20
–40
1G
100
VCM = 4.5V
30
10
–80
1M
120
PHASE
40
–20
–60
LT6202/03/04 G21
GAIN BANDWIDTH
0
VS = 3V, 0V
60
125
VS = ±5V
GAIN
20
0
100
Open-Loop Gain vs Frequency
120
10
GAIN BANDWIDTH
120
100k
PHASE (DEG)
VS = ±5V
TA = 25°C
RL = 1k
CL = 5pF
–800
VS = ±2.5V VS = ±5V
100
AV = 10
10
AV = 2
1
0.1
AV = 1
10
60
40
0
2
10
12
8
6
TOTAL SUPPLY VOLTAGE (V)
4
14
LT6202/03/04 G24
0
–55 –25
50
25
75
0
TEMPERATURE (°C)
100
125
LT6202/03/04 G25
0.01
100k
1M
10M
FREQUENCY (Hz)
100M
LT6202/03/04 G26
620234f
12
PHASE (DEG)
60
VS = 3V, 0V
0
25
75
50
TEMPERATURE (°C)
–400
80
60
GAIN (dB)
80
PHASE MARGIN (DEG)
VS = ±5V
–25
0
Open-Loop Gain vs Frequency
90
80
400
LT6202/03/04 G19.1
Gain Bandwidth and Phase
Margin vs Temperature
120
800
– 1200
10
GAIN (dB)
100
VS = 5V, 0V
VCM = VS/2
–1000
0
10
GAIN BANDWITH (MHz)
1200
UNBALANCED SOURCE
RESISTANCE
VS = 5V, 0V
TA = 25°C
10
0
GAIN BANDWITH (MHz)
0.1Hz to 10Hz Output
Voltage Noise
OUTPUT IMPEDANCE (Ω)
BALANCED NOISE CURRENT (pA/√Hz)
7
Unbalanced Noise Current vs
Frequency
OUTPUT VOLTAGE (nV)
Balanced Noise Current vs
Frequency
LT6202/LT6203/LT6204
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
80
–40
TA = 25°C
AV = 1
VS = ±5V
–50
100
COMMON MODE REJECTION RATIO (dB)
VS = 5V, 0V
VCM = VS/2
–60
VOLTAGE GAIN (dB)
80
60
40
–70
–80
–90
–100
20
–110
0
10k
100k
100M
1M
10M
FREQUENCY (Hz)
1G
40
VS = 5V, 0V
AV = 1
1
10
FREQUENCY (MHz)
OVERSHOOT (%)
OVERSHOOT (%)
NEGATIVE
SUPPLY
20
10
25
RS = 20Ω
15
10k
1k
100
100k
1M
FREQUENCY (Hz)
RS = 50Ω
RL = 50Ω
VS = ±5V
AV = 1
TA = 25°C
–
150
25
RS = 50Ω
RL = 50Ω
15
VIN
+
VOUT
500Ω
1mV
1mV
100
50
10
10mV
10mV
5
0
0
10
100
CAPACITIVE LOAD (pF)
1000
0
100
CAPACITIVE LOAD (pF)
10
LT6202/03/04 G29
10
–
VOUT
+
100
1mV
50
1mV
10mV
10mV
0
–4
–3
–2
1
2
–1
0
OUTPUT STEP (V)
3
4
LT6202/03/04 G32
1
2
–1
0
OUTPUT STEP (V)
9
–50
AV = –1
7
6
5
3
VS = ±5V
TA = 25°C
HD2, HD3 < –40dBc
2
10k
4
AV = 1
VS = ±2.5V
VOUT = 2V(P-P)
8
4
3
Distortion vs Frequency
DISTORTION (dBc)
VIN
150
–2
–40
AV = 2
500Ω
500Ω
–3
LT6202/03/04 G31
Maximum Undistorted Output
Signal vs Frequency
OUTPUT VOLTAGE SWING (VP-P)
VS = ±5V
AV = –1
TA = 25°C
–4
1000
LT6202/03/04 G30
Settling Time vs Output Step
(Inverting)
200
100M
Settling Time vs Output Step
(Noninverting)
RS = 20Ω
20
10M
LT6202/03/04 G28
RS = 10Ω
30
RS = 10Ω
5
SETTLING TIME (ns)
30
200
VS = 5V, 0V
AV = 2
35
10
POSITIVE
SUPPLY
40
Series Output Resistor vs
Capacitive Load
40
20
50
LT6202/03/04 G27.1
Series Output Resistor vs
Capacitive Load
30
60
0
–120
0.1
LT6202/03/04 G27
35
VS = 5V, 0V
TA = 25°C
VCM = VS/2
70
SETTLING TIME (ns)
COMMON MODE REJECTION RATIO (dB)
120
Power Supply Rejection Ratio
vs Frequency
Channel Separation vs Frequency
100k
1M
FREQUENCY (Hz)
–60
RL = 100Ω, 3RD
RL = 100Ω, 2ND
–70
–80
RL = 1k, 3RD
–90
RL = 1k, 2ND
10M
LT6202/03/04 G33
–100
10k
100k
1M
FREQUENCY (Hz)
10M
LT6202/03/04 G34
620234f
13
LT6202/LT6203/LT6204
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Distortion vs Frequency
–30
–40
DISTORTION (dBc)
DISTORTION (dBc)
AV = 1
VS = ±5V
VOUT = 2V(P-P)
RL = 100Ω, 3RD
–60
RL = 100Ω, 2ND
–70
–80
–40
AV = 2
VS = ±2.5V
VOUT = 2V(P-P)
–50
–50
RL = 100Ω, 3RD
DISTORTION (dBc)
–40
–50
Distortion vs Frequency
Distortion vs Frequency
RL = 100Ω, 2ND
–60
–70
–80
–90
–70
–80
–90
–90
RL = 1k, 3RD
100k
1M
FREQUENCY (Hz)
RL = 100Ω, 2ND
–60
RL = 1k, 3RD
RL = 1k, 2ND
–100
10k
AV = 2
RL = 100Ω, 3RD
VS = ±5V
VOUT = 2V(P-P)
10M
–100
10k
RL = 1k, 2ND
RL = 1k, 3RD
RL = 1k, 2ND
100k
1M
FREQUENCY (Hz)
10M
–100
10k
100k
1M
FREQUENCY (Hz)
LT6202/03/04 G36
LT6202/03/04 G35
5V Large-Signal Response
10M
LT6202/03/04 G37
5V Small-Signal Response
1V/DIV
50mV/DIV
5V
0V
0V
200ns/DIV
VS = 5V, 0V
AV = 1
RL = 1k
200ns/DIV
VS = 5V, 0V
AV = 1
RL = 1k
LT6202/03/04 G38
±5V Large-Signal Response
LT6202/03/04 G39
Output-Overdrive Recovery
VOUT
VIN
(2V/DIV) (1V/DIV)
2V/DIV
5V
0V
–5V
0V
0V
200ns/DIV
200ns/DIV
VS = ±5V
AV = 1
RL = 1k
LT6202/03/04 G40
VS = 5V, 0V
AV = 2
LT6202/03/04 G41
620234f
14
LT6202/LT6203/LT6204
U
W
U
U
APPLICATIO S I FOR ATIO
Amplifier Characteristics
Input bias current normally flows out of the + and – inputs.
The magnitude of this current increases when the input
common mode voltage is within 1.5V of the negative rail,
and only Q1/Q4 are active. The polarity of this current
reverses when the input common mode voltage is within
1.5V of the positive rail and only Q2/Q3 are active.
Figure 1 shows a simplified schematic of the LT6202/
LT6203/LT6204, which has two input differential amplifiers in parallel that are biased on simultaneously when the
common mode voltage is at least 1.5V from either rail. This
topology allows the input stage to swing from the positive
supply voltage to the negative supply voltage. As the
common mode voltage swings beyond VCC – 1.5V, current
source I1 saturates and current in Q1/Q4 is zero. Feedback
is maintained through the Q2/Q3 differential amplifier, but
with an input gm reduction of 1/2. A similar effect occurs
with I2 when the common mode voltage swings within
1.5V of the negative rail. The effect of the gm reduction is
a shift in the VOS as I1 or I2 saturate.
The second stage is a folded cascode and current mirror
that converts the input stage differential signals to a single
ended output. Capacitor C1 reduces the unity cross
frequency and improves the frequency stability without
degrading the gain bandwidth of the amplifier. The
differential drive generator supplies current to the output
transistors that swing from rail-to-rail.
V+
+
R1
–V
R2
I1
–
VBIAS
Q11
+V
Q5
DESD1
Q6
DESD2
+
Q2
D1
D2
+V
Q3
Q1
C1
CM
+V
Q4
–
DESD3
DESD4
–V
DESD5
DIFFERENTIAL
DRIVE
GENERATOR
Q9
DESD6
Q7
Q8
+V
Q10 –V
R3
R4
I2
R5
D3
V–
6203/04 F01
Figure 1. Simplified Schematic
620234f
15
LT6202/LT6203/LT6204
U
W
U
U
APPLICATIO S I FOR ATIO
Input Protection
There are back-to-back diodes, D1 and D2, across the
+ and – inputs of these amplifiers to limit the differential
input voltage to ±0.7V. The inputs of the LT6202/LT6203/
LT6304 do not have internal resistors in series with the
input transistors. This technique is often used to protect
the input devices from over voltage that causes excessive
currents to flow. The addition of these resistors would
significantly degrade the low noise voltage of these amplifiers. For instance, a 100Ω resistor in series with each
input would generate 1.8nV/√Hz of noise, and the total
amplifier noise voltage would rise from 1.9nV/√Hz to
2.6nV/√Hz. Once the input differential voltage exceeds
±0.7V, steady state current conducted though the protection diodes should be limited to ±40mA. This implies 25Ω
of protection resistance per volt of continuous overdrive
beyond ±0.7V. The input diodes are rugged enough to
handle transient currents due to amplifier slew rate overdrive or momentary clipping without these resistors.
Figure 2 shows the input and output waveforms of the
amplifier driven into clipping while connected in a gain of
AV = 1. When the input signal goes sufficiently beyond the
power supply rails, the input transistors will saturate.
When saturation occurs, the amplifier loses a stage of
phase inversion and the output tries to change states.
Diodes D1 and D2 forward bias and hold the output within
a diode drop of the input signal. In this photo, the input
signal generator is clipping at ±35mA, and the output
transistors supply this generator current through the
protection diodes.
With the amplifier connected in a gain of AV ≥ 2, the output
can invert with very heavy input overdrive. To avoid this
inversion, limit the input overdrive to 0.5V beyond the
power supply rails.
ESD
The LT6202/LT6203/LT6204 have reverse-biased ESD
protection diodes on all inputs and outputs as shown in
Figure 1. If these pins are forced beyond either supply,
unlimited current will flow through these diodes. If the
current is transient and limited to one hundred milliamps
or less, no damage to the device will occur.
Noise
The noise voltage of the LT6202/LT6203/LT6204 is equivalent to that of a 225Ω resistor, and for the lowest possible
noise it is desirable to keep the source and feedback
resistors at or below this value, i.e. RS + RG||RFB ≤ 225Ω.
With RS + RG||RFB = 225Ω the total noise of the amplifier
is: en = √(1.9nV)2 + (1.9nV)2 = 2.7nV. Below this resistance
value, the amplifier dominates the noise, but in the resistance region between 225Ω and approximately 10kΩ, the
noise is dominated by the resistor thermal noise. As the
total resistance is further increased, beyond 10k, the noise
current multiplied by the total resistance eventually dominates the noise.
The product of en • √ISUPPLY is an interesting way to gauge
low noise amplifiers. Many low noise amplifiers with low
en have high ISUPPLY current. In applications that require
low noise with the lowest possible supply current, this
product can prove to be enlightening. The LT6202/LT6203/
LT6204 have an en, √ISUPPLY product of 3.2 per amplifier,
yet it is common to see amplifiers with similar noise
specifications have an en • √ISUPPLY product of 4.7 to 13.5.
For a complete discussion of amplifier noise, see the
LT1028 data sheet.
OV
LT6202/03/04 F02
Figure 2. VS = ±2.5V, AV = 1 with Large Overdrive
620234f
16
LT6202/LT6203/LT6204
U
TYPICAL APPLICATIO S
Low Noise, Low Power 1MΩ AC
Photodiode Transimpedance Amplifier
Figure 3 shows the LT6202 applied as a transimpedance
amplifier (TIA). The LT6202 forces the BF862 ultralownoise JFET source to 0V, with R3 ensuring that the JFET
has an IDRAIN of 1mA. The JFET acts as a source follower,
buffering the input of the LT6202 and making it suitable for
the high impedance feedback elements R1 and R2. The
BF862 has a minimum IDSS of 10mA and a pinchoff voltage
between –0.3V and –1.2V. The JFET gate and the LT6202
output therefore sit at a point slightly higher than one
+
VS
R1
499k
R2
499k
–
C1
1pF
+
LT6202
VOUT
R3
4.99k
VS = ±5V
–
LT6202/03/04 F03
VS
Precision Low Noise, Low Power, 1MΩ
Photodiode Transimpedance Amplifier
Figure 4 shows the LT6202 applied as a transimpedance
amplifier (TIA), very similar to that shown in Figure 3. In
this case, however, the JFET is not allowed to dictate the
DC-bias conditions. Rather than being grounded, the
LT6202’s noninverting input is driven by the LTC2050 to
the exact state necessary for zero JFET gate voltage. The
noise performance is nearly identical to that of the circuit
in Figure 3, with the additional benefit of excellent DC
performance. Input offset was measured at under 200µV
and output noise was within 2mVP-P over a 20MHz bandwidth.
PHILIPS
BF862
VBIAS–
pinchoff voltage below ground (typically about –0.6V).
When the photodiode is illuminated, the current must
come from the LT6202’s output through R1 and R2, as in
a normal TIA. Amplifier input noise density and gainbandwidth product were measured at 2.4nV/Hz and
100MHz, respectively. Note that because the JFET has a
high gm, approximately 1/80Ω, its attenuation looking into
R3 is only about 2%. Gain-bandwidth product was measured at 100MHz and the closed-loop bandwidth using a
3pF photodiode was approximately 1.4MHz.
Figure 3. Low Noise, Low Power 1MΩ
AC Photodiode Transimpedance Amplifier
VS+
C1
1pF
–
VBIAS–
–
R5
10k
+
LTC2050HV
+
R2
499k
PHILIPS
BF862
C2
0.1µF
R4
10M
R1
499k
C3
1µF
LT6202
VOUT
R3
4.99k
VS = ±5V
VS–
LT6202/03/04 F04
Figure 4. Precision Low Noise, Low Power Transimpedance Amplifier
620234f
17
LT6202/LT6203/LT6204
U
TYPICAL APPLICATIO S
Single-Supply 16-Bit ADC Driver
Figure 5 shows the LT6203 driving an LTC1864 unipolar
16-bit A/D converter. The bottom half of the LT6203 is in
a gain-of-one configuration and buffers the 0V negative
full-scale signal VLOW into the negative input of the
LTC1864. The top half of the LT6203 is in a gain-of-ten
configuration referenced to the buffered voltage VLOW and
drives the positive input of the LTC1864. The input range
of the LTC1864 is 0V to 5V, but for best results the input
range of VIN should be from VLOW (about 0.4V) to about
0.82V. Figure 6 shows an FFT obtained with a 10.1318kHz
coherent input waveform, from 8192 samples with no
windowing or averaging. Spurious free dynamic range is
seen to be about 100dB.
VIN = 0.6VDC
±200mVAC
Although the LTC1864 has a sample rate far below the gain
bandwidth of the LT6203, using this amplifier is not
necessarily a case of overkill. The designer is reminded
that A/D converters have sample apertures that are vanishingly small (ideally, infinitesimally small) and make demands on the upstream circuitry far in excess of what is
implied by the innocent-looking sample rate. In addition,
when an A/D converter takes a sample, it applies a small
capacitor to its inputs with a fair amount of glitch energy
and expects the voltage on the capacitor to settle to the
true value very quickly. Finally, the LTC1864 has a 20MHz
analog input bandwidth and can be used in undersampling
applications, again requiring a source bandwidth higher
than Nyquist.
5V
R3
100Ω
+
1/2 LT6203
–
R1
1k
+
C1
470pF
VLOW = 0.4VDC
R2
110Ω
+
–
LTC1864
16-BIT
250kSPS
SERIAL
DATA
OUT
R4
100Ω
1/2 LT6203
–
LT6202/03/04 F05
SFDR (dB)
Figure 5. Single-Supply 16-Bit ADC Driver
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
fS = 250ksps
fIN = 10.131836kHz
0 12.5 25 37.5 50 62.5 75 82.5 100 112.5 125
FREQUENCY (kHz)
LT6202/03/04 F06
Figure 6. FFT Showing 100dB SFDR
620234f
18
LT6202/LT6203/LT6204
U
PACKAGE DESCRIPTIO
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.189 – .196*
(4.801 – 4.978)
.045 ±.005
16 15 14 13 12 11 10 9
.254 MIN
.009
(0.229)
REF
.150 – .165
.229 – .244
(5.817 – 6.198)
.0165 ± .0015
.150 – .157**
(3.810 – 3.988)
.0250 TYP
RECOMMENDED SOLDER PAD LAYOUT
1
.015 ± .004
× 45°
(0.38 ± 0.10)
.007 – .0098
(0.178 – 0.249)
.053 – .068
(1.351 – 1.727)
2 3
4
5 6
7
8
.004 – .0098
(0.102 – 0.249)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. CONTROLLING DIMENSION: INCHES
INCHES
2. DIMENSIONS ARE IN
(MILLIMETERS)
3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
.008 – .012
(0.203 – 0.305)
.0250
(0.635)
BSC
GN16 (SSOP) 0502
620234f
19
LT6202/LT6203/LT6204
U
PACKAGE DESCRIPTIO
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
3.2 – 3.45
(.126 – .136)
0.42 ± 0.04
(.0165 ± .0015)
TYP
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.65
(.0256)
BSC
8
7 6 5
0.52
(.206)
REF
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
3.00 ± 0.102
(.118 ± .004)
NOTE 4
4.90 ± 0.15
(1.93 ± .006)
DETAIL “A”
0° – 6° TYP
GAUGE PLANE
0.53 ± 0.015
(.021 ± .006)
DETAIL “A”
1
2 3
4
1.10
(.043)
MAX
0.86
(.034)
REF
0.18
(.077)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
NOTE:
BSC
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
0.13 ± 0.076
(.005 ± .003)
MSOP (MS8) 0802
620234f
20
LT6202/LT6203/LT6204
U
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 ±.005
.050 BSC
8
7
6
5
N
N
.245
MIN
.160 ±.005
1
.030 ±.005
TYP
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
.053 – .069
(1.346 – 1.752)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
1
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
2
3
4
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
SO8 0502
620234f
21
LT6202/LT6203/LT6204
U
PACKAGE DESCRIPTIO
S Package
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.337 – .344
(8.560 – 8.738)
NOTE 3
.045 ±.005
.050 BSC
14
N
12
11
10
9
8
N
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
1
.030 ±.005
TYP
13
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
2
3
4
5
.053 – .069
(1.346 – 1.752)
NOTE:
1. DIMENSIONS IN
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
7
.004 – .010
(0.101 – 0.254)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
6
.050
(1.270)
BSC
S14 0502
620234f
22
LT6202/LT6203/LT6204
U
PACKAGE DESCRIPTIO
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62
MAX
0.95
REF
2.90 BSC
(NOTE 4)
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45 TYP
5 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
S5 TSOT-23 0302
620234f
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.
23
LT6202/LT6203/LT6204
U
TYPICAL APPLICATIO
Low Noise Differential Amplifier with Gain Adjust and Common Mode Control
C3
5pF
C1
270pF
R1
402Ω
0dB
VIN–
R2
200Ω
6dB
R10, 402Ω
V+
R3
100Ω
–
12dB
R4
402Ω
R9
402Ω
–
1/2 LT6203
+
0dB
VIN+
C2
22pF
R7, 402Ω
VOUT+
V+
R5
200Ω
6dB
1/2 LT6203
RA
+
RB
R6
100Ω
VOUT–
0.1µF
R8
402Ω
OUTPUT VCM =
12dB
(
)
RB
V+
RA + R B
LT6202/03/04 F07
RELATIVE DIFFERENTIAL GAIN (1dB/DIV)
Low Noise Differential Amplifier
Frequency Response
G = 0dB
G = 6dB
G = 12dB
50k
1M
FREQUENCY (Hz)
5M
LT6202/03/04 F08
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1028
Single, Ultralow Noise 50MHz Op Amp
1.1nV/√Hz
LT1677
Single, Low Noise Rail-to-Rail Amplifier
3V Operation, 2.5mA, 4.5nV/√Hz, 60µV Max V0S
LT1722/LT1723/LT1724
Single/Dual/Quad Low Noise Precision Op Amps
70V/µs Slew Rate, 400µV Max VOS, 3.8nV/√Hz, 3.7mA
LT1800/LT1801/LT1802
Single/Dual/Quad Low Power 80MHz Rail-to-Rail Op Amps
8.5nV/√Hz, 2mA Max Supply
LT1806/LT1807
Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifiers
2.5V Operation, 550µV Max VOS, 3.5nV/√Hz
LT6200
Single Ultralow Noise Rail-to-Rail Amplifier
0.95nV/√Hz, 165MHz Gain Bandwidth
620234f
24
Linear Technology Corporation
LT/TP 1002 2K • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
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 LINEAR TECHNOLOGY CORPORATION 2002