LT6234IS8 [Linear]
60MHz, Rail-to-Rail Output, 1.9nV / SIGME Hz, 1.15mA Op Amp Family; 为60MHz ，轨至轨输出， 1.9nV / Hz的SIGME ， 1.15毫安运算放大器系列
| 型号： | LT6234IS8 |
| 厂家： | 
Linear |
| 描述： | 60MHz, Rail-to-Rail Output, 1.9nV / SIGME Hz, 1.15mA Op Amp Family |
| 文件： | 总24页 (文件大小：720K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT6233/LT6233-10/
LT6234/LT6235
60MHz, Rail-to-Rail Output,
1.9nV/√Hz, 1.15mA Op Amp Family
U
DESCRIPTIO
FEATURES
The LT®6233/LT6234/LT6235 are single/dual/quad low
noise, rail-to-rail output unity gain stable op amps that
feature 1.9nV/√Hz noise voltage and draw only 1.15mA of
supply current per amplifier. These amplifiers combine
very low noise and supply current with a 60MHz gain
bandwidth product, a 17V/µs slew rate and are optimized
for low supply voltage signal conditioning systems. The
LT6233-10 is a single amplifier optimized for higher gain
applications resulting in higher gain bandwidth and slew
rate. The LT6233 and LT6233-10 include an enable pin
that can be used to reduce the supply current to less than
10µA.
■
Low Noise Voltage: 1.9nV/√Hz
■
Low Supply Current: 1.15mA/Amp Max
■
Low Offset Voltage: 350µV Max
■
Gain Bandwidth Product:
LT6233: 60MHz; AV ≥ 1
LT6233-10: 375MHz; AV ≥ 10
■
Wide Supply Range: 3V to 12.6V
■
Output Swings Rail-to-Rail
■
Common Mode Rejection Ratio 115dB Typ
■
Output Current: 30mA
■
Operating Temperature Range –40°C to 85°C
■
LT6233 Shutdown to 10µA Maximum
■
LT6233/LT6233-10 in SOT-23 Package
The amplifier family has an output that swings within
50mV of either supply rail to maximize the signal dynamic
range in low supply applications and is specified on 3.3V,
5V and ±5V supplies. The en • √ISUPPLY product of 2.1 per
amplifier is among the most noise efficient of any op amp.
■
Dual LT6234 in Tiny DFN Package
U
APPLICATIO S
■
Ultrasound Amplifiers
The LT6233/LT6233-10 is available in the 6-lead SOT-23
package and the LT6234 dual is available in the 8-pin SO
package with standard pinouts. For compact layouts, the
dual is also available in a tiny dual fine pitch leadless
package (DFN). The LT6235 is available in the 16-pin
SSOP package.
■
Low Noise, Low Power Signal Processing
■
Active Filters
■
Driving A/D Converters
■
Rail-to-Rail Buffer Amplifiers
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
Noise Voltage and Unbalanced
Noise Current vs Frequency
Low Noise Low Power Instrumentation Amplifier
+
V
S
6
5
4
3
2
1
0
6
5
4
3
2
1
0
V
T
CM
= ±2.5V
= 25°C
= 0V
+
R4
R6
S
A
V
IN
499Ω
499Ω
1/2 LT6234
+
V
S
R2
475Ω
+
–
R1
49.9Ω
LT6233
V
OUT
EN
NOISE VOLTAGE
NOISE CURRENT
R3
R5
499Ω
R7
499Ω
475Ω
–
V
S
1/2 LT6234
–
IN
A
= 20
I
E
= 3mA
S
= 8µV
V
BW = 2.8MHz
= ±1.5V to ±5V
INPUT REFERRED,
N
RMS
–
10
100
1k
10k
100k
V
S
V
S
MEASUREMENT BW = 4MHz
FREQUENCY (Hz)
623345 TA01a
623345 TA01b
623345f
1
LT6233/LT6233-10/
LT6234/LT6235
W W
U W
ABSOLUTE AXI U RATI GS (Note 1)
Total Supply Voltage (V+ to V–) ............................ 12.6V Junction Temperature........................................... 150°C
Input Current (Note 2) ........................................ ±40mA Junction Temperature (DD Package) ................... 125°C
Output Short-Circuit Duration (Note 3)............ Indefinite Storage Temperature Range ..................–65°C to 150°C
Operating Temperature Range (Note 4) ...–40°C to 85°C Storage Temperature Range
Specified Temperature Range (Note 5)....–40°C to 85°C (DD Package) ...................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
U
W
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
TOP VIEW
LT6233CS6
LT6234CDD
LT6234IDD
TOP VIEW
+
OUT A
–IN A
+IN A
1
2
3
4
8
7
6
5
V
LT6233IS6
+
OUT 1
–
6 V
OUT B
–IN B
+IN B
–
+
LT6233CS6-10
LT6233IS6-10
5 ENABLE
4 –IN
V
2
–
+
–
+IN 3
V
S6 PACKAGE
S6 PART
DD PART
6-LEAD PLASTIC SOT-23
DD PACKAGE
MARKING*
MARKING*
8-LEAD (3mm × 3mm) PLASTIC DFN
T
JMAX = 150°C, θJA = 250°C/W
TJMAX = 125°C, θJA = 160°C/W
UNDERSIDE METAL CONNECTED TO V–
(PCB CONNECTION OPTIONAL)
LAET
LTAFL
LTAFM
TOP VIEW
ORDER PART
NUMBER
ORDER PART
NUMBER
OUT A
–IN A
+IN A
1
2
3
4
5
6
7
8
16 OUT D
15 –IN D
TOP VIEW
–
+
+–A
LT6235CGN
LT6235IGN
LT6234CS8
LT6234IS8
D
C
+
OUT A
1
2
3
4
8
7
6
5
V
14
13
12
11
10
9
+IN D
+
–
V
V
–IN A
OUT B
–IN B
+IN B
–
+
+
+
–
+IN B
–IN B
OUT B
NC
+IN C
–IN C
OUT C
NC
+IN A
–
+
–B
–
V
GN PART
MARKING
S8 PART
MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 190°C/W
6235
6235I
6234
6234I
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
TJMAX = 150°C, θJA = 135°C/W
*The temperature grade is identified by a label on the shipping container.Consult LTC Marketing for parts specified with wider operating temperature ranges.
623345f
2
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
TA = 25°C, VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply,
ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6233S6, LT6233S6-10
LT6234S8, LT6235GN
LT6234DD
100
50
75
500
350
450
µV
µV
µV
OS
Input Offset Voltage Match
80
450
µV
(Channel-to-Channel) (Note 6)
I
I
Input Bias Current
1.5
0.04
0.04
220
1.9
3
µA
µA
µA
B
I Match (Channel-to-Channel) (Note 6)
B
0.3
0.3
Input Offset Current
OS
Input Noise Voltage
0.1Hz to 10Hz
nV
P-P
e
Input Noise Voltage Density
Input Noise Current Density, Balanced Source
f = 10kHz, V = 5V
3
nV/√Hz
n
S
i
f = 10kHz, V = 5V, R = 10k
0.43
0.78
pA/√Hz
pA/√Hz
n
S
S
Unbalanced Source f = 10kHz, V = 5V, R = 10k
S
S
Input Resistance
Input Capacitance
Large-Signal Gain
Common Mode
Differential Mode
22
25
MΩ
kΩ
C
A
Common Mode
Differential Mode
2.5
4.2
pF
pF
IN
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
73
18
140
35
V/mV
V/mV
VOL
S
O
L
S
R = 1k to V /2
L
S
V = 3.3V, V = 0.65V to 2.65V, R = 10k to V /2
53
11
100
20
V/mV
V/mV
S
O
L
S
R = 1k to V /2
L
S
V
Input Voltage Range
Guaranteed by CMRR, V = 5V, 0V
1.5
1.15
4
2.65
V
V
CM
S
V = 3.3V, 0V
S
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
90
85
115
110
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V = 5V, V = 1.5V to 4V
90
90
95
3
115
115
115
dB
dB
dB
V
S
CM
V = 3V to 10V
S
PSRR Match (Channel-to-Channel) (Note 6)
Minimum Supply Voltage (Note 7)
V = 3V to 10V
S
V
V
Output Voltage Swing LOW (Note 8)
No Load
4
75
165
125
40
mV
mV
mV
mV
OL
OH
I
= 5mA
180
320
240
SINK
V = 5V, I
= 15mA
= 10mA
SINK
S
SINK
V = 3.3V, I
S
Output Voltage Swing HIGH (Note 8)
Short-Circuit Current
No Load
5
85
220
165
50
mV
mV
mV
mV
I
= 5mA
195
410
310
SOURCE
V = 5V, I
= 15mA
S
SOURCE
V = 3.3V, I
S
= 10mA
SOURCE
I
I
V = 5V
±40
±35
±55
±50
mA
mA
SC
S
V = 3.3V
S
Supply Current per Amplifier
Disabled Supply Current per Amplifier
1.05
0.2
1.15
10
mA
µA
S
+
ENABLE = V – 0.35V
623345f
3
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
TA = 25°C, VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply,
ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
–75
0.3
UNITS
µA
V
I
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
ENABLE = 0.3V
–25
ENABLE
V
V
L
+
V – 0.35
V
H
+
ENABLE = V – 0.35V, V = 1.5V to 3.5V
0.2
500
76
10
µA
ns
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
L S
ON
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
GBW
Gain Bandwidth Product
Frequency = 1MHz, V = 5V
LT6233-10
55
320
MHz
MHz
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 0.5V to 4.5V
10
15
80
V/µs
V/µs
S
V
L
O
LT6233-10, V = 5V, A = –10, R = 1k,
S
V
L
V = 0.5V to 4.5V
O
FPBW
Full Power Bandwidth
V = 5V, V
= 3V (Note 9)
1.06
1.6
2.2
MHz
MHz
ns
S
OUT
P-P
LT6233-10, HD = HD ≤ 1%
2
3
t
Settling Time (LT6233, LT6234, LT6235)
0.1%, V = 5V, V
= 2V, A = –1, R = 1k
175
S
S
STEP
V
L
The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half
supply, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6233S6, LT6233S6-10
LT6234S8, LT6235GN
LT6234DD
●
●
●
600
450
550
µV
µV
µV
OS
Input Offset Voltage Match
●
500
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
V
= Half Supply
●
●
●
●
0.5
3.0
3.5
0.4
0.4
µV/°C
µA
OS
CM
I
I
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
Large-Signal Gain
µA
OS
A
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
●
●
47
12
V/mV
V/mV
VOL
S
O
L
S
R = 1k to V /2
L
S
V = 3.3V, V = 0.65V to 2.65V, R = 10k to V /2
●
●
40
7.5
V/mV
V/mV
S
O
L
S
R = 1k to V /2
L
S
V
Input Voltage Range
Guaranteed by CMRR, V = 5V, 0V
●
●
1.5
1.15
4
2.65
V
V
CM
S
V = 3.3V, 0V
S
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
●
●
90
85
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
CMRR Match (Channel-to-Channel) (Note 6) V = 5V, V = 1.5V to 4V
●
●
●
●
90
90
95
3
dB
dB
dB
V
S
CM
Power Supply Rejection Ratio
V = 3V to 10V
S
PSRR Match (Channel-to-Channel) (Note 6) V = 3V to 10V
S
Minimum Supply Voltage (Note 7)
V
Output Voltage Swing LOW (Note 8)
No Load
= 5mA
●
●
●
●
50
mV
mV
mV
mV
OL
I
195
360
265
SINK
V = 5V, I
= 15mA
S
SINK
= 10mA
SINK
V = 3.3V, I
S
623345f
4
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over 0°C < TA < 70°C
temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Output Voltage Swing HIGH (Note 8)
No Load
●
●
●
●
60
mV
mV
mV
mV
OH
I
= 5mA
205
435
330
SOURCE
V = 5V, I
= 15mA
= 10mA
SOURCE
S
SOURCE
V = 3.3V, I
S
I
I
I
Short-Circuit Current
V = 5V
V = 3.3V
S
●
●
±35
±30
mA
mA
SC
S
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
1.39
mA
µA
S
+
ENABLE = V – 0.25V
ENABLE = 0.3V
1
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
–85
0.3
µA
V
ENABLE
V
V
L
+
V – 0.25
V
H
+
ENABLE = V – 0.25V, V = 1.5V to 3.5V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
500
120
ns
ON
L
S
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 0.5V to 4.5V
S
9
V/µs
V/µs
V
L
O
LT6233-10, A = –10, R = 1k,
75
V
L
V = 0.5V to 4.5V
O
FPBW
Full Power Bandwidth (Note 9)
LT6233, V = 5V, V
= 3V
P-P
●
955
kHz
S
OUT
The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half
supply, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6233S6, LT6233S6-10
LT6234S8, LT6235GN
LT6234DD
●
●
●
700
550
650
µV
µV
µV
OS
Input Offset Voltage Match
●
550
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
V
= Half Supply
●
●
●
●
0.5
3
µV/°C
µA
OS
CM
I
I
4
B
I Match (Channel-to-Channel) (Note 6)
B
0.4
0.5
µA
Input Offset Current
Large-Signal Gain
µA
OS
A
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
●
●
45
11
V/mV
V/mV
VOL
S
O
L
S
R = 1k to V /2
L
S
V = 3.3V, V = 0.65V to 2.65V,R = 10k to V /2
●
●
38
7
V/mV
V/mV
S
O
L
S
R = 1k to V /2
L
S
V
Input Voltage Range
Guaranteed by CMRR, V = 5V, 0V
●
●
1.5
1.15
4
2.65
V
V
CM
S
V = 3.3V, 0V
S
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
●
●
90
85
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V = 5V, V = 1.5V to 4V
●
●
90
90
dB
dB
S
CM
V = 3V to 10V
S
623345f
5
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over –40°C < TA < 85°C
temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
95
3
TYP
MAX
UNITS
dB
PSRR Match (Channel-to-Channel) (Note 6)
Minimum Supply Voltage (Note 7)
Output Voltage Swing LOW (Note 8)
V = 3V to 10V
S
●
●
V
V
V
No Load
●
●
●
●
50
mV
mV
mV
mV
OL
OH
I
= 5mA
195
370
275
SINK
V = 5V, I
V = 3.3V, I
S
= 15mA
S
SINK
= 10mA
SINK
Output Voltage Swing HIGH (Note 6)
Short-Circuit Current
No Load
●
●
●
●
60
mV
mV
mV
mV
I
= 5mA
210
445
335
SOURCE
V = 5V, I
V = 3.3V, I
S
= 15mA
S
SOURCE
= 10mA
SOURCE
I
I
I
V = 5V
●
●
±30
±20
mA
mA
SC
S
V = 3.3V
S
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
1.46
mA
µA
S
+
ENABLE = V – 0.2V
ENABLE = 0.3V
1
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
–100
0.3
µA
V
ENABLE
V
V
L
+
V – 0.2V
V
H
+
ENABLE = V – 0.2V, V = 1.5V to 3.5V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
500
135
ns
ON
L
S
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 0.5V to 4.5V
8
V/µs
V/µs
S
V
L
O
LT6233-10, A = –10, R = 1k,
70
V
L
V = 0.5V to 4.5V
O
FPBW
Full Power Bandwidth (Note 9)
LT6233, V = 5V, V
= 3V
P-P
●
848
kHz
S
OUT
TA = 25°C, VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6233S6, LT6233S6-10
LT6234S8, LT6235GN
LT6234DD
100
50
75
500
350
450
µV
µV
µV
OS
Input Offset Voltage Match
100
450
µV
(Channel-to-Channel) (Note 6)
I
I
Input Bias Current
1.5
0.04
0.04
220
1.9
3
µA
µA
µA
B
I Match (Channel-to-Channel) (Note 6)
B
0.3
0.3
Input Offset Current
OS
Input Noise Voltage
0.1Hz to 10Hz
f = 10kHz
nV
P-P
e
Input Noise Voltage Density
3.0
nV/√Hz
n
i
Input Noise Current Density, Balanced Source
Unbalanced Source
f = 10kHz, R = 10k
0.43
0.78
pA/√Hz
pA/√Hz
n
S
f = 10kHz, R = 10k
S
623345f
6
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
TA = 25°C, VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Resistance
Common Mode
Differential Mode
22
25
MΩ
kΩ
C
A
V
Input Capacitance
Large-Signal Gain
Common Mode
Differential Mode
2.1
3.7
pF
pF
IN
V = ±4.5V, R = 10k
97
28
180
55
V/mV
V/mV
VOL
O
L
R = 1k
L
Input Voltage Range
Guaranteed by CMRR
–3
90
95
90
95
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
V
= –3V to 4V
= –3V to 4V
110
120
115
115
CM
CM
PSRR
V = ±1.5V to ±5V
S
PSRR Match (Channel-to-Channel) (Note 6)
Output Voltage Swing LOW (Note 8)
V = ±1.5V to ±5V
S
V
V
No Load
4
75
165
40
180
320
mV
mV
mV
OL
OH
I
I
= 5mA
= 15mA
SINK
SINK
Output Voltage Swing HIGH (Note 8)
Short-Circuit Current
No Load
5
85
220
50
195
410
mV
mV
mV
I
I
= 5mA
= 15mA
SOURCE
SOURCE
I
I
±40
±55
mA
SC
Supply Current per Amplifier
Disabled Supply Current per Amplifier
1.15
0.2
1.25
10
mA
µA
S
ENABLE = 4.65V
ENABLE = 0.3V
I
ENABLE Pin Current
–35
–85
0.3
µA
V
ENABLE
V
V
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
L
4.65
V
H
ENABLE = 4.65V, V = ±1V
0.2
900
100
10
µA
ns
µs
O
t
t
ENABLE = 5V to 0V, R = 1k
L
ON
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
OFF
L
GBW
Gain Bandwidth Product
Frequency = 1MHz
LT6233-10
42
260
60
375
MHz
MHz
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
12
17
V/µs
V/µs
V
L
O
LT6233-10, A = –10, R = 1k,
115
V
L
V = –2V to 2V
O
FPBW
Full Power Bandwidth
V
= 3V (Note 9)
1.27
1.8
2.2
MHz
MHz
ns
OUT
P-P
LT6233-10, HD = HD ≤ 1%
2
3
t
Settling Time (LT6233, LT6234, LT6235)
0.1%, V
= 2V, A = –1, R = 1k
170
S
STEP
V
L
623345f
7
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over 0°C < TA < 70°C
temperature range. VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6233S6, LT6233S6-10
LT6234S8, LT6235GN
LT6234DD
●
●
●
600
450
550
µV
µV
µV
OS
Input Offset Voltage Match
●
500
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
●
●
●
●
0.5
3
µV/°C
µA
OS
I
I
3.5
0.4
0.4
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
Large-Signal Gain
µA
OS
A
V = ±4.5V,R = 10k
R = 1k
L
●
●
75
22
V/mV
V/mV
VOL
O
L
V
Input Voltage Range
Guaranteed by CMRR
●
●
●
●
●
–3
90
95
90
95
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
V
= –3V to 4V
= –3V to 4V
CM
CM
PSRR
V = ±1.5V to ±5V
S
PSRR Match (Channel-to-Channel) (Note 6)
Output Voltage Swing LOW (Note 8)
V = ±1.5V to ±5V
S
V
V
No Load
●
●
●
50
195
360
mV
mV
mV
OL
OH
I
I
= 5mA
= 15mA
SINK
SINK
Output Voltage Swing HIGH (Note 8)
Short-Circuit Current
No Load
●
●
●
60
205
435
mV
mV
mV
I
= 5mA
= 15mA
SOURCE
SOURCE
I
I
I
●
±35
mA
SC
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
1.53
mA
µA
S
ENABLE = 4.75V
ENABLE = 0.3V
1
I
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
–95
0.3
µA
V
ENABLE
V
V
L
4.75
V
H
ENABLE = 4.75V, V = ±1V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k
900
150
ns
ON
L
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
µs
OFF
L
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
11
V/µs
V/µs
V
L
O
LT6233-10, A = –10, R = 1k,
105
V
L
V = –2V to 2V
O
FPBW
Full Power Bandwidth (Note 9)
LT6233, V
= 3V
●
1.16
MHz
OUT
P-P
623345f
8
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over –40°C < TA < 85°C
temperature range. VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6233S6, LT6233S6-10
LT6234S8, LT6235GN
LT6234DD
●
●
●
700
550
650
µV
µV
µV
OS
Input Offset Voltage Match
●
550
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
●
●
●
●
0.5
3
µV/°C
µA
OS
I
I
4
B
I Match (Channel-to-Channel) (Note 6)
B
0.4
0.5
µA
Input Offset Current
Large-Signal Gain
µA
OS
A
V = ±4.5V,R = 10k
R = 1k
L
●
●
68
20
V/mV
V/mV
VOL
O
L
V
Input Voltage Range
Guaranteed by CMRR
●
●
●
●
●
–3
90
90
90
95
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
V
= –3V to 4V
= –3V to 4V
CM
CM
PSRR
V = ±1.5V to ±5V
S
PSRR Match (Channel-to-Channel) (Note 6)
Output Voltage Swing LOW (Note 8)
V = ±1.5V to ±5V
S
V
V
No Load
●
●
●
50
195
370
mV
mV
mV
OL
OH
I
I
= 5mA
= 15mA
SINK
SINK
Output Voltage Swing HIGH (Note 8)
Short-Circuit Current
No Load
●
●
●
70
210
445
mV
mV
mV
I
I
= 5mA
= 15mA
SOURCE
SOURCE
I
I
●
±30
mA
SC
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
1.61
mA
µA
S
ENABLE = 4.8V
ENABLE = 0.3V
1
I
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
–110
0.3
µA
V
ENABLE
V
V
L
4.8
V
H
ENABLE = 4.8V, V = ±1V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k
900
160
ns
ON
L
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
µs
OFF
L
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
10
V/µs
V/µs
V
L
O
LT6233-10, A = –10, R = 1k,
95
V
L
V = –2V to 2V
O
FPBW
Full Power Bandwidth (Note 9)
LT6233, V
= 3V
●
1.06
MHz
OUT
P-P
623345f
9
LT6233/LT6233-10/
LT6234/LT6235
ELECTRICAL CHARACTERISTICS
Note 1: Absolute maximum ratings are those values beyond which the life
The LT6233I/LT6234I/LT6235I are guaranteed to meet specified
of the device may be impaired.
performance from –40°C to 85°C.
Note 2: Inputs are protected by back-to-back diodes. If 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 6: Matching parameters are the difference between the two amplifiers
A and D and between B and C of the LT6235; between the two amplifiers
of the LT6234. CMRR and PSRR match are defined as follows: CMRR and
PSRR are measured in µV/V on the matched 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
Note 4: The LT6233C/LT6233I the LT6234C/LT6234I, and LT6235C/
LT6235I are guaranteed functional over the temperature range of –40°C
and 85°C.
power supply rails.
Note 9: Full-power bandwidth is calculated from the slew rate:
FPBW = SR/2πV
Note 10: This parameter is not 100% tested.
Note 5: The LT6233C/LT6234C/LT6235C are guaranteed to meet specified
performance from 0°C to 70°C. The LT6233C/LT6234C/LT6235C 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.
P
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6233/LT6234/LT6235)
Supply Current vs Supply Voltage
(Per Amplifier)
Offset Voltage vs Input Common
Mode Voltage
VOS Distribution
2.0
1.5
1.0
0.5
0
500
400
60
50
40
30
20
10
0
V
V
= 5V, 0V
CM
V
= 5V, 0V
S
S
+
= V /2
S8
300
T
= 125°C
= 25°C
A
200
T
100
A
0
–100
–200
–300
–400
–500
T
= –55°C
A
T
A
= –55°C
= 25°C
T
A
T
= 125°C
A
50 100
2
4
8
10
12
14
0.5
1 2
2.5
3 3.5 4 4.5 5
–200 –150 –100 –50
0
150 200
0
6
0
1.5
INPUT OFFSET VOLTAGE (µV)
TOTAL SUPPLY VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
623345 GO1
623345 GO2
623345 GO3
Input Bias Current vs
Common Mode Voltage
Output Saturation Voltage vs
Load Current (Output Low)
Input Bias Current vs Temperature
10
1
6
5
6
5
V
= 5V, 0V
V
= 5V, 0V
V = 5V, 0V
S
S
S
4
4
3
T = 125°C
A
0.1
T
= –55°C
3
A
2
T
= –55°C
A
V
= 4V
CM
2
0.01
0.001
0.0001
T
A
= 125°C
1
V
= 1.5V
CM
T
= 25°C
1
A
T
= 25°C
0
A
0
–1
–2
–1
0.01
0.1
1
10
100
0
1
3
4
5
6
–25
0
50
75 100 125
–1
2
–50
25
LOAD CURRENT (mA)
COMMON MODE VOLTAGE (V)
TEMPERATURE (°C)
623345 GO6
623345 GO4
623345 GO5
623345f
10
LT6233/LT6233-10/
LT6234/LT6235
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6233/LT6234/LT6235)
Output Saturation Voltage vs
Load Current (Output High)
Output Short Circuit Current vs
Power Supply Voltage
Minimum Supply Voltage
10
1
1.0
0.8
80
V
= 5V, 0V
V
= V /2
S
CM S
T
= –55°C
= 125°C
A
60
40
0.6
T
A
0.4
SINKING
T
= 25°C
20
A
0.2
T
= 125°C
0.1
0
A
0
–0.2
–0.4
–0.6
–0.8
–1.0
T
= –55°C
–20
–40
–60
–80
SOURCING
A
T = –55°C
A
T
= 125°C
A
0.01
0.001
T
= –55°C
A
T
= 25°C
A
T
= 25°C
A
T
= 125°C
T
= 25°C
A
A
0.01
0.1
1
10
100
0
0.5
1
1.5
2
2.5
3
3.5 4 4.5 5
2.0
2.5
3.5 4.0 4.5 5.0
1.5
3.0
LOAD CURRENT (mA)
TOTAL SUPPLY VOLTAGE (V)
POWER SUPPLY VOLTAGE (±V)
623345 G07
623345 G08
623345 GO9
Open Loop Gain
Open Loop Gain
Open Loop Gain
2.5
2.0
2.5
2.0
2.5
2.0
V
T
= 3V, 0V
= 25°C
V
T
= 5V, 0V
= 25°C
V
A
= ±5V
S
S
A
S
A
T
= 25°C
1.5
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
R
= 1k
R
L
= 1k
R
L
= 1k
L
0
0
0
R
= 100Ω
R
= 100Ω
L
–0.5
–1.0
–1.5
–2.0
–2.5
L
–0.5
–1.0
–1.5
–2.0
–2.5
–0.5
–1.0
–1.5
–2.0
–2.5
R = 100Ω
L
0.5
1
2
2.5
3
3.5
4
4.5
5
–4 –3
–1
0
1
2
3
4
5
0
0.5
1.0
1.5
2.0
2.5
3.0
0
1.5
–5
–2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
623345 G10
623345 G11
623345 G12
Total Noise vs Total Source
Resistance
Offset Voltage vs Output Current
Warm-Up Drift vs Time
100
10
1
2.0
1.5
40
35
30
25
20
15
10
0
V
= ±5V
V
V
= ±2.5V
CM
T
= 25°C
S
S
A
= 0V
TOTAL NOISE
f = 100kHz
UNBALANCED
SOURCE
V
= ±5V
S
T
= 125°C
A
1.0
RESISTORS
0.5
RESISTOR NOISE
0
V
= ±2.5V
= ±1.5V
30
S
–0.5
–1.0
–1.5
–2.0
AMPLIFIER NOISE VOLTAGE
V
S
T
= –55°C
A
T
= 25°C
A
0.1
–60
–30
0
30
60
90
–90
10
40
50
0
20
10
100
1k
10k
100k
OUTPUT CURRENT (mA)
TOTAL SOURCE RESISTANCE (Ω)
TIME AFTER POWER-UP (s)
623345 G15
623345 G13
623345 G14
623345f
11
LT6233/LT6233-10/
LT6234/LT6235
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6233/LT6234/LT6235)
0.1Hz to 10Hz Output Voltage
Noise
Gain Bandwidth and Phase Margin
vs Temperature
Noise Voltage and Unbalanced
Noise Current vs Frequency
6
5
4
3
2
1
0
6
5
4
3
2
1
0
70
60
50
40
V
T
= ±2.5V
V
= ±2.5V
S
A
S
= 25°C
V
= ±5V
S
V
= 0V
CM
PHASE MARGIN
V
= 3V, 0V
S
100nV
90
80
70
60
50
40
C
= 5pF
L
L
R
= 1k
V
= V /2
CM
S
NOISE VOLTAGE
NOISE CURRENT
–100nV
GAIN BANDWIDTH
V
= ±5V
S
V
= 3V, 0V
5
S
10
100
1k
10k
100k
–25
35
65
95
125
5s/DIV
–55
FREQUENCY (Hz)
TEMPERATURE (°C)
623345 G16
623345 G17
623345 G18
Gain Bandwidth and Phase Margin
vs Supply Voltage
Open Loop Gain vs Frequency
Slew Rate vs Temperature
80
70
60
50
40
30
20
10
0
120
26
24
80
70
60
50
40
C
R
V
= 5pF
T
= 25°C
= 5pF
= 1k
A
= –1
V
L
L
A
L
L
= 1k
C
R
= R = 1k
F G
100
80
= V /2
R
CM
S
PHASE
V
= ±5V FALLING
S
22
20
18
16
14
12
10
60
V
= ±5V RISING
S
V
= ±5V
S
PHASE MARGIN
V
= 3V, 0V
S
40
20
70
60
50
40
30
0
V
= ±5V
S
V
= 3V, 0V
V
= ±2.5V FALLING
–20
–40
–60
–80
S
S
GAIN BANDWIDTH
GAIN
V
= ±2.5V RISING
S
–10
–20
100k
1M
10M
FREQUENCY (Hz)
100M
1G
2
4
8
10
12
14
–35 –15
25 45 65 85 105 125
TEMPERATURE (°C)
0
6
–55
5
TOTAL SUPPLY VOLTAGE (V)
623345 G19
623345 G20
623345 G21
Common Mode Rejection Ratio vs
Frequency
Channel Separation vs Frequency
Output Impedance vs Frequency
1k
100
10
120
100
80
60
40
20
0
–40
V
= 5V, 0V
A
= 1
= 25°C
= ±5V
S
V
A
–50
–60
T
V
S
A
= 10
–70
V
–80
–90
A
= 2
V
–100
–110
–120
–130
–140
A
= 1
V
1
V
V
= 5V, 0V
S
= V /2
CM
S
0.1
10k
100k
1M
10M
100M
1G
100k
1M
10M
100M
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623345 G24
623345 G23
623345 G22
623345f
12
LT6233/LT6233-10/
LT6234/LT6235
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6233/LT6234/LT6235)
Power Supply Rejection Ratio vs
Frequency
Series Output Resistance and
Overshoot vs Capacitive Load
Series Output Resistance and
Overshoot vs Capacitive Load
120
100
80
60
40
20
0
50
45
40
35
30
25
20
15
10
5
50
V
T
= 5V, 0V
= 25°C
= V /2
V
A
= 5V, 0V
= 1
V
A
= 5V, 0V
= 2
S
A
CM
S
V
S
V
45
40
35
30
25
20
15
10
5
R
= 10Ω
V
S
S
R
= 10Ω
S
R
= 20Ω
R
= 20Ω
POSITIVE SUPPLY
S
S
R
= 50Ω
= 50Ω
S
L
R
NEGATIVE SUPPLY
R
R
= 50Ω
= 50Ω
S
L
0
0
1k
10k
100k
1M
10M
100M
10
100
CAPACITIVE LOAD (pF)
1000
10
100
CAPACITIVE LOAD (pF)
1000
FREQUENCY (Hz)
623345 G25
623345 G26
623345 G27
Settling Time vs Output Step
(Non-Inverting)
Settling Time vs Output Step
(Inverting)
Maximum Undistorted Output
Signal vs Frequency
10
9
400
350
300
250
200
150
100
50
400
350
300
250
200
150
100
50
V
= ±5V
= 25°C
= 1
V
= ±5V
= 25°C
= –1
A
= 2
500Ω
S
A
S
A
V
T
T
A
A
A = –1
V
V
V
500Ω
–
+
–
+
V
IN
8
V
V
OUT
OUT
7
V
IN
500Ω
6
1mV
1mV
5
1mV
1mV
10mV
10mV
10mV
10mV
4
V
= ±5V
S
A
3
T
= 25°C
HD , HD < –40dBc
2
3
2
10k
100k
1M
10M
–3 –2 –1
1
2
3
4
–3 –2 –1
1
2
3
4
–4
0
–4
0
FREQUENCY (Hz)
OUTPUT STEP (V)
OUTPUT STEP (V)
623345 G30
623345 G28
623345 G29
Distortion vs Frequency
Distortion vs Frequency
Distortion vs Frequency
–40
–50
–60
–70
–80
–90
–100
–30
–40
–50
–60
–70
–80
–90
–100
–40
–50
–60
–70
–80
–90
–100
V
A
V
= ±5V
= 1
OUT
V
A
V
= ±2.5V
= 2
V
A
V
= ±2.5V
= 1
S
V
S
V
S
V
R
= 1k, 3RD
L
= 2V
= 2V
= 2V
(P–P)
(P–P)
(P–P)
OUT
OUT
R
= 100Ω, 2ND
L
R
= 100Ω, 2ND
L
R
= 100Ω, 2ND
L
R
= 1k, 3RD
L
R
= 1k, 3RD
R
= 100Ω, 3RD
L
L
R
= 100Ω, 3RD
R
= 100Ω, 3RD
L
L
R
= 1k, 2ND
L
R
= 1k, 2ND
R
= 1k, 2ND
L
L
10k
100k
1M
10M
10k
100k
1M
10M
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623345 G32
623345 G33
623345 G31
623345f
13
LT6233/LT6233-10/
LT6234/LT6235
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6233/LT6234/LT6235)
Large Signal Response
Small Signal Response
Distortion vs Frequency
–30
–40
–50
–60
–70
–80
–90
–100
V
A
V
= ±5V
= 2
OUT
S
V
= 2V
(P–P)
2V
R
= 1k, 3RD
L
R
= 100Ω, 2ND
L
0V
0V
R
= 100Ω, 3RD
L
–2V
R
= 1k, 2ND
L
VS = ±2.5V
V = –1
RL = 1k
200ns/DIV
VS = ±2.5V
V = 1
RL = 1k
200ns/DIV
A
A
623345 G35
623345 G36
10k
100k
1M
10M
FREQUENCY (Hz)
623345 G34
Large Signal Response
Output Overdrive Recovery
5V
0V
0V
0V
–5V
VS = ±5V
200ns/DIV
VS = ±2.5V
AV = 3
200ns/DIV
AV = 1
R
L = 1k
623345 G37
623345 G38
(LT6233) ENABLE Characteristics
Supply Current vs ENABLE Pin
Voltage
ENABLE Pin Current vs ENABLE
Pin Voltage
ENABLE Pin Response Time
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
35
30
25
20
15
10
5
V
A
= ±2.5V
= 1
S
V
T
= 125°C
A
T
= –55°C
A
T
= 25°C
5V
0V
A
T
T
= 25°C
A
A
T
= –55°C
A
= 125°C
0.5V
0V
VS = ±2.5V
200µs/DIV
V
IN = 0.5V
V
= ±2.5V
S
AV = 1
0
–2.0
0
1.0
2.0
–1.0
–2.0
0
1.0
2.0
–1.0
RL = 1k
623345 G41
PIN VOLTAGE (V)
PIN VOLTAGE (V)
623345 G39
623345 G40
623345f
14
LT6233/LT6233-10/
LT6234/LT6235
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6233-10)
Gain Bandwidth and Phase Margin
vs Temperature
Series Output Resistance and
Overshoot vs Capacitive Load
Slew Rate vs Temperature
200
180
160
140
120
100
80
70
450
400
350
300
250
200
A
= 10
A = –10
V
V
A
= 5V, 0V
= 10
V
S
V
R = 1k
F
G
V
= ±5V
R
= 10Ω
S
60
50
40
30
20
10
0
S
R
= 100Ω
V
= ±5V FALLING
= ±2.5V RISING
S
GAIN BANDWIDTH
PHASE MARGIN
V
= ±5V RISING
S
R
= 20Ω
S
V
= 3V, 0V
S
R
= 50Ω
S
V
S
70
60
50
40
60
V
= ±5V
V
= ±2.5V FALLING
S
S
40
V
= 3V, 0V
S
20
0
10
100
1000
10000
–25
0
50
75 100 125
–35 –15
25 45 65 85 105 125
TEMPERATURE (°C)
–50
25
–55
5
CAPACITIVE LOAD (pF)
TEMPERATURE (°C)
623345 G44
623345 G42
623345 G43
Gain Bandwidth and Phase Margin
vs Supply Voltage
Open Loop Gain vs Frequency
Gain Bandwidth vs Resistor Load
80
70
120
100
80
400
350
300
250
200
150
100
50
450
375
300
225
A
C
R
V
= 10
= 5pF
= 1k
V = ±5V
T
= 25°C
= 10
= 5pF
= 1k
V
L
L
S
A
V
L
PHASE
T
= 25°C
= 1k
= 100
A
C
A
F
G
R
R
60
= V /2
R
CM
S
L
V
= ±5V
S
50
60
GAIN BANDWIDTH
PHASE MARGIN
GAIN
40
V
= 3V, 0V 40
S
30
20
0
V
= 3V, 0V
S
20
100
50
0
10
–20
V
= ±5V
0
–40
–60
–80
S
–10
–20
100k
0
10M
FREQUENCY (Hz)
100M
1G
0
200
400
600
800
1000
1M
2
4
8
10
12
0
6
TOTAL RESISTOR LOAD (Ω)
TOTAL SUPPLY VOLTAGE (V)
(INCLUDES FEEDBACK R)
623345 G45
623345 G47
623345 G46
Common Mode Rejection Ratio vs
Frequency
Maximum Undistorted Output vs
Frequency
2nd and 3rd Harmonic Distortion vs
Frequency
–30
–40
–50
–60
–70
–80
–90
–100
120
10
9
8
7
6
5
4
3
2
1
0
V
A
V
= ±2.5V
= 10
S
V
V
V
= 5V, 0V
= V /2
S
CM
S
= 2V
R
= 1k, 3RD
(P–P)
OUT
L
100
80
60
40
20
0
R
= 100Ω, 3RD
L
R
= 100Ω, 2ND
L
R
= 1k, 2ND
L
V
= ±5V
= 25°C
= 10
S
A
T
A
V
HD , HD ≤ 40dBc
2
3
10k
100k
1M
10M
10k
100k
1M
10M
100M
1G
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623345 G50
623345 G49
623345 G48
623345f
15
LT6233/LT6233-10/
LT6234/LT6235
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6233-10)
2nd and 3rd Harmonic Distortion vs
Frequency
Large Signal Response
Output-Overload Recovery
–30
–40
–50
–60
–70
–80
–90
–100
V
A
V
= ±5V
= 10
OUT
S
V
= 2V
(P–P)
R
= 1k, 2ND
L
R
= 100Ω, 3RD
L
R
= 100Ω, 2ND
0V
0V
0V
L
R
= 1k, 3RD
L
VS = ±5V
100ns/DIV
VS = 5V, 0V
AV = 10
100ns/DIV
AV = 10
RF = 900Ω, RG = 100Ω
623345 G52
R
F = 900Ω, RG = 100Ω
623345 G53
10k
100k
1M
10M
FREQUENCY (Hz)
623345 G51
Input Referred High Frequency
Noise Spectrum
Small Signal Response
10
2.5V
0
VS = 5V, 0V
V = 10
RF = 900Ω, RG = 100Ω
100ns/DIV
100kHz
20MHz
A
2MHz/DIV
623345 G54
623345 G55
623345f
16
LT6233/LT6233-10/
LT6234/LT6235
U
W
U U
APPLICATIO S I FOR ATIO
Amplifier Characteristics
2.5V
0V
Figure 1 is a simplified schematic of the LT6233/LT6234/
LT6235, which has apairoflownoiseinputtransistors Q1
and Q2. A simple current mirror Q3/Q4 converts the
differential signal to a single-ended output, and these
transistorsaredegeneratedtoreducetheircontributionto
the overall noise.
–2.5V
500µs/DIV
Capacitor C1 reduces the unity cross frequency and
improves the frequency stability without degrading the
gain bandwidth of the amplifier. Capacitor CM sets the
overall amplifier gain bandwidth. The differential drive
generator supplies current to transistors Q5 and Q6 that
swing the output from rail-to-rail.
623345 F02
Figure 2. VS = ±2.5V, AV = 1 with Large Overdrive
handle transient currents due to amplifier slew rate over-
drive and clipping without protection resistors.
The photo of Figure 2 shows the output response to an
input overdrive with the amplifier connected as a voltage
follower. With the input signal low, current source I1
saturates and the differential drive generator drives Q6
into saturation so the output voltage swings all the way to
V–. The input can swing positive until transistor Q2 satu-
rates into current mirror Q3/Q4. When saturation occurs,
the output tries to phase invert, but diode D2 conducts
current from the signal source to the output through the
feedback connection. The output is clamped a diode drop
below the input. In this photo, the input signal generator
is limiting at about 20mA.
+V
+V
Q5
C
M
Q3
Q4
DESD5
V
OUT
–V
+V
C1
DESD2
DESD6
DIFFERENTIAL
DRIVE GENERATOR
DESD1
–V
D2
–V
+V
–V
Q1
Q2
IN
Q6
D1
+V
+V
IN
BIAS
ENABLE
I
1
DESD3
DESD4
–V
–V
623345 F01
Figure 1. Simplified Schematic
With the amplifier connected in a gain of AV ≥ 2, the output
can invert with very heavy overdrive. To avoid this inver-
sion, limit the input overdrive to 0.5V beyond the power
supply rails.
Input Protection
Thereareback-to-backdiodes,D1andD2acrossthe+and
– inputs of these amplifiers to limit the differential input
voltage to ±0.7V. The inputs of the LT6233/LT6234/
LT6235 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
current to flow. The addition of these resistors would
significantly degrade the low noise voltage of these ampli-
fiers. 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, steadystatecurrentconductedthroughtheprotec-
tion diodes should be limited to ±40mA. This implies 25Ω
of protection resistance is necessary per volt of overdrive
beyond ±0.7V. These input diodes are rugged enough to
ESD
The LT6233/LT6234/LT6235 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
ThenoisevoltageoftheLT6233/LT6234/LT6235isequiva-
lent to that of a 225Ω resistor, and for the lowest possible
noise it is desirable to keep the source and feedback
resistance at or below this value, i.e. RS + RG||RFB ≤ 225Ω.
623345f
17
LT6233/LT6233-10/
LT6234/LT6235
U
W
U U
APPLICATIO S I FOR ATIO
For a complete discussion of amplifier noise, see the
LT1028 data sheet.
With RS + RG||RFB = 225Ω the total noise of the
amplifier is:
eN=√(1.9nV)2+(1.9nV)2 = 2.69nV/√Hz
Enable Pin
Below this resistance value, the amplifier dominates the
noise, but in the region between 225Ω and about 30k, the
noise is dominated by the resistor thermal noise. As the
total resistance is further increased beyond 30k, the
amplifier noise current multiplied by the total resistance
eventually dominates the noise.
The LT6233 and LT6233-10 include an ENABLE pin that
shuts down the amplifier to 10µA maximum supply cur-
rent. The ENABLE pin must be driven high to within 0.35V
of V+ to shut down the supply current. This can be
accomplished with simple gate logic; however care must
be taken if the logic and the LT6233 operate from different
supplies. If this is the case, then open drain logic can be
used with a pull-up resistor to ensure that the amplifier
remains off. See Typical Characteristic Curves.
TheproductofeN •√ISUPPLY isaninterestingwaytogauge
low noise amplifiers. Most low noise amplifiers with low
eN have high ISUPPLY current. In applications that require
low noise voltage with the lowest possible supply current,
this product can prove to be enlightening. The LT6233/
LT6234/LT6235 have an eN • √ISUPPLY product of only 2.1
per amplifier, yet it is common to see amplifiers with
similar noise specifications to have eN • √ISUPPLY as high
as 13.5.
The output leakage current when disabled is very low;
however, current can flow into the input protection diodes
D1 and D2 if the output voltage exceeds the input voltage
by a diode drop.
623345f
18
LT6233/LT6233-10/
LT6234/LT6235
U
W
U U
APPLICATIO S I FOR ATIO
Single Supply, Low Noise, Low Power, Bandpass Filter with Gain = 10
Frequency Response Plot of
Bandpass Filter
23
C2
47pF
R1
732Ω
1
f
=
= 1MHz
0
+
2πRC
V
C = √C C , R = R1 = R2
1
2
C1
1000pF
732Ω
0.1µF
R3
R2
f
f
=
MHz, MAXIMUM f = 1MHz
3
0
0
(
)
R
10k
732Ω
f
0
=
V
IN
–
+
–3dB
2.5
LT6233
EN
V
OUT
A
E
= 20dB at f
V
0
= 6µV
INPUT REFERRED
+
N
RMS
I
S
= 1.5mA FOR V = 5V
R4
10k
C3
0.1µF
–7
100k
1M
10M
623345 F03
FREQUENCY (Hz)
623345 F04
Low Power, Low Noise, Single Supply, Instrumentation
Amplifier with Gain = 100
R1
30.9Ω
R2
511Ω
+
C2
2200pF
V
C8
68pF
–
U1
LT6233-10
+
R15
88.7Ω
R10
511Ω
V
V
+
IN1
EN
C1
1µF
R13
2k
–
+
R6
511Ω
U3
V
OUT
LT6233
EN
R3
30.9Ω
R4
511Ω
R16
88.7Ω
C9
68pF
R12
511Ω
+
V
R14
2k
C4
10µF
R5
511Ω
–
V
= 100 (V – V
)
R1 = R3
U2
OUT
IN2
IN1
R2 = R4
LT6233-10
R2
R1
R10
GAIN =
+ 1
R10 = R12
R15 = R16
(
) (R15)
V
+
IN2
EN
INPUT RESISTANCE = R5 = R6
= 310Hz TO 2.5MHz
C3
1µF
f
E
–3dB
= 10µV
INPUT REFERRED
RMS
N
I
S
= 4.7mA FOR V = 5V, 0V
S
623345 F05
623345f
19
LT6233/LT6233-10/
LT6234/LT6235
U
PACKAGE DESCRIPTIO
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
2.90 BSC
(NOTE 4)
0.62
MAX
0.95
REF
1.22 REF
1.4 MIN
1.50 – 1.75
2.80 BSC
3.85 MAX 2.62 REF
(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
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.90 BSC
0.09 – 0.20
(NOTE 3)
S6 TSOT-23 0302
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
623345f
20
LT6233/LT6233-10/
LT6234/LT6235
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115
0.38 ± 0.10
TYP
5
8
0.675 ±0.05
3.5 ±0.05
2.15 ±0.05 (2 SIDES)
1.65 ±0.05
3.00 ±0.10
(4 SIDES)
1.65 ± 0.10
(2 SIDES)
PIN 1
TOP MARK
PACKAGE
OUTLINE
(DD8) DFN 0203
4
1
0.28 ± 0.05
0.75 ±0.05
0.200 REF
0.28 ± 0.05
0.50 BSC
0.50
BSC
2.38 ±0.05
(2 SIDES)
2.38 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. ALL DIMENSIONS ARE IN MILLIMETERS
3. 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
4. EXPOSED PAD SHALL BE SOLDER PLATED
623345f
21
LT6233/LT6233-10/
LT6234/LT6235
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)
.045 ±.005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(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)
SO8 0303
623345f
22
LT6233/LT6233-10/
LT6234/LT6235
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
.009
(0.229)
REF
16 15 14 13 12 11 10 9
.254 MIN
.150 – .165
.229 – .244
.150 – .157**
(5.817 – 6.198)
(3.810 – 3.988)
.0165 ±.0015
.0250 TYP
RECOMMENDED SOLDER PAD LAYOUT
1
2
3
4
5
6
7
8
.015 ± .004
(0.38 ± 0.10)
× 45°
.053 – .068
(1.351 – 1.727)
.004 – .0098
(0.102 – 0.249)
.007 – .0098
(0.178 – 0.249)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
.0250
(0.635)
BSC
.008 – .012
(0.203 – 0.305)
NOTE:
1. CONTROLLING DIMENSION: INCHES
INCHES
2. DIMENSIONS ARE IN
(MILLIMETERS)
GN16 (SSOP) 0502
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
623345f
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 represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
23
LT6233/LT6233-10/
LT6234/LT6235
U
TYPICAL APPLICATIO S
The LT6233 is applied as a transimpedance amplifier with
an I-to-V conversion gain of 10kΩ set by R1. The LT6233
is ideally suited to this application because of its low input
offset voltage and current, and its low noise. This is be-
cause the 10k resistor has an inherent thermal noise of
13nV/√Hz or 1.3pA/√Hz at room temperature, while the
LT6233 contributes only 2nV and 0.8pA /√Hz. So, with
respect to both voltage and current noises, the LT6233 is
actually quieter than the gain resistor.
the photodiode, it induces a current IPD which flows into
the amplifier circuit. The amplifier output falls negative to
maintain balance at its inputs. The transfer function is
therefore VOUT = –IPD • 10k. C1 ensures stability and good
settling characteristics. Output offset was measured
at better than 500µV, so low in part because R2 serves to
cancel the DC effects of bias current. Output noise was
measured at below 1mVP–P on a 20MHz measurement
bandwidth,withC2shuntingR2’sthermalnoise. Asshown
inthescopephoto,therisetimeis45ns,indicatingasignal
bandwidth of 7.8MHz.
Thecircuitusesanavalanchephotodiodewiththecathode
biased to approximately 200V. When light is incident on
Low Power Avalanche Photodiode Transimpedance Amplifier
IS = 1.2mA
Photodiode Amplifier Time Domain Response
≈ 200V BIAS
C1
2.7pF
ADVANCED PHOTONIX
012-70-62-541
WWW.ADVANCEDPHOTONIX.COM
R1
10k
5V
–
R2
10k
LT6233
+
100ns/DIV
–5V
ENABLE
623345 TA02b
623345 TA02a
C2
0.1µF
OUTPUT OFFSET = 500µV TYPICAL
BANDWIDTH = 7.8MHz
OUTPUT NOISE = 1mV
(20MHz MEASUREMENT BW)
P–P
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1028
Single, Ultra Low Noise 50MHz Op Amp
Single, Low Noise Rail-to-Rail Amplifier
Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifier
Single/Dual, Low Noise 165MHz
0.85nV/√Hz
LT1677
3V Operation, 2.5mA, 4.5nV/√Hz, 60µV Max V
OS
LT1806/LT1807
LT6200/LT6201
LT6202/LT6203/LT6204
2.5V Operation, 550µV Max V , 3.5nV/√Hz
OS
0.95nV√Hz, Rail-to-Rail Input and Output
Single/Dual/Quad, Low Noise, Rail-to-Rail Amplifier
1.9nV/√Hz, 3mA Max, 100MHz Gain Bandwidth
623345f
LT/TP 1003 1K • PRINTED IN USA
24 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
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LINEAR TECHNOLOGY CORPORATION 2003
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号：
LT6234IS8#PBF
LT6234 - 60MHz, Rail-to-Rail Output, 1.9nV/rtHz, 1.2mA Op Amp Family; Package: SO; Pins: 8; Temperature Range: -40°C to 85°C
Linear
LT6234IS8#TR
LT6234 - 60MHz, Rail-to-Rail Output, 1.9nV/rtHz, 1.2mA Op Amp Family; Package: SO; Pins: 8; Temperature Range: -40°C to 85°C
Linear
LT6235CGN#PBF
LT6235 - 60MHz, Rail-to-Rail Output, 1.9nV/rtHz, 1.2mA Op Amp Family; Package: SSOP; Pins: 16; Temperature Range: 0°C to 70°C
Linear
LT6235CGN#TR
LT6235 - 60MHz, Rail-to-Rail Output, 1.9nV/rtHz, 1.2mA Op Amp Family; Package: SSOP; Pins: 16; Temperature Range: 0°C to 70°C
Linear
LT6235CGN#TRPBF
LT6235 - 60MHz, Rail-to-Rail Output, 1.9nV/rtHz, 1.2mA Op Amp Family; Package: SSOP; Pins: 16; Temperature Range: 0°C to 70°C
Linear
LT6235IGN#PBF
LT6235 - 60MHz, Rail-to-Rail Output, 1.9nV/rtHz, 1.2mA Op Amp Family; Package: SSOP; Pins: 16; Temperature Range: -40°C to 85°C
Linear
LT6235IGN#TR
LT6235 - 60MHz, Rail-to-Rail Output, 1.9nV/rtHz, 1.2mA Op Amp Family; Package: SSOP; Pins: 16; Temperature Range: -40°C to 85°C
Linear
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