LTC1992 Family
Low Power, Fully Differential
Input/Output
Amplifier/Driver Family
FEATURES
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■
■
■
■
■
■
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■
DESCRIPTIO
Adjustable Gain and Fixed Gain Blocks of 1, 2, 5
and 10
±0.3%
(Max) Gain Error from –40°C to 85°C
3.5ppm/°C Gain Temperature Coefficient
5ppm Gain Long Term Stability
Fully Differential Input and Output
C
LOAD
Stable up to 10,000pF
Adjustable Output Common Mode Voltage
Rail-to-Rail Output Swing
Low Supply Current: 1mA (Max)
High Output Current: 10mA (Min)
Specified on a Single 2.7V to
±5V
Supply
DC Offset Voltage <2.5mV (Max)
Available in 8-Lead MSOP Package
The LTC
®
1992 product family consists of five fully differ-
ential, low power amplifiers. The LTC1992 is an uncon-
strained fully differential amplifier. The LTC1992-1,
LTC1992-2, LTC1992-5 and LTC1992-10 are fixed gain
blocks (with gains of 1, 2, 5 and 10 respectively) featuring
precision on-chip resistors for accurate and ultrastable
gain. All of the LTC1992 parts have a separate internal
common mode feedback path for outstanding output
phase balancing and reduced second order harmonics.
The V
OCM
pin sets the output common mode level inde-
pendent of the input common mode level. This feature
makes level shifting of signals easy.
The amplifiers’ differential inputs operate with signals
ranging from rail-to-rail with a common mode level from
the negative supply up to 1.3V from the positive supply.
The differential input DC offset is typically 250µV. The rail-
to-rail outputs sink and source 10mA. The LTC1992 is
stable for all capacitive loads up to 10,000pF.
The LTC1992 can be used in single supply applications
with supply voltages as low as 2.7V. It can also be used
with dual supplies up to
±5V.
The LTC1992 is available in
an 8-pin MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Differential Driver/Receiver
Differential Amplification
Single-Ended to Differential Conversion
Level Shifting
Trimmed Phase Response for Multichannel Systems
TYPICAL APPLICATIO
Single-Supply, Single-Ended to Differential Conversion
10k
5V
10k
0V
–5V
10k
0.01µF
INPUT SIGNAL
FROM A
±5V
SYSTEM
V
IN
1
7
2
8
5V
3
5V
4
5V
2.5V
0V
5V
2.5V
0V
OUTPUT SIGNAL
FROM A
SINGLE-SUPPLY SYSTEM
1992 TA01a
– +
V
MID
V
OCM
6
10k
V
IN
(5V/DIV)
+OUT
(2V/DIV)
–OUT
1992 TA01b
LTC1992
5
+ –
U
0V
–5V
5V
0V
1992f
U
U
1
LTC1992 Family
ABSOLUTE
AXI U
RATI GS
Total Supply Voltage (+V
S
to –V
S
) .......................... 12V
Maximum Voltage
on any Pin .......... (–V
S
– 0.3V)
≤
V
PIN
≤
(+V
S
+ 0.3V)
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 5)
LTC1992CMS8/LTC1992-XCMS8/
LTC1992IMS8/LTC1992-XIMS8 ..........–40°C to 85°C
LTC1992HMS8/LTC1992-XHMS8 .....–40°C to 125°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
–IN
V
OCM
+V
S
+OUT
1
2
3
4
8
7
6
5
+IN
V
MID
–V
S
–OUT
+
+–
–
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/W
ORDER PART
NUMBER
LTC1992CMS8
LTC1992IMS8
LTC1992HMS8
MS8 PART
MARKING
LTYU
LTZC
LTAGR
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
U
U
W
W W
U
W
(Note 1)
Specified Temperature Range (Note 6)
LTC1992CMS8/LTC1992-XCMS8/
LTC1992IMS8/LTC1992-XIMS8 ..........–40°C to 85°C
LTC1992HMS8/LTC1992-XHMS8 .....–40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
TOP VIEW
–IN
V
OCM
+V
S
+OUT
1
2
3
4
8
7
6
5
+IN
V
MID
–V
S
–OUT
–
+–
+
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/W
ORDER PART
NUMBER
LTC1992-1CMS8
LTC1992-1IMS8
LTC1992-1HMS8
LTC1992-2CMS8
LTC1992-2IMS8
LTC1992-2HMS8
LTC1992-5CMS8
LTC1992-5IMS8
LTC1992-5HMS8
LTC1992-10CMS8
LTC1992-10IMS8
LTC1992-10HMS8
MS8 PART
MARKING
LTACJ
LTACM
LTAFZ
LTYV
LTZD
LTAGA
LTACK
LTACN
LTAJH
LTACL
LTACP
LTAJJ
1992f
LTC1992 Family
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. +V
S
= 5V, –V
S
= 0V, V
INCM
= V
OUTCM
= V
OCM
= 2.5V, unless otherwise
noted. V
OCM
is the voltage on the V
OCM
pin. V
OUTCM
is defined as (+V
OUT
+ –V
OUT
)/2. V
INCM
is defined as (+V
IN
+ –V
IN
)/2. V
INDIFF
is
defined as (+V
IN
– –V
IN
). V
OUTDIFF
is defined as (+V
OUT
– –V
OUT
). Specifications applicable to all parts in the LTC1992 family.
SYMBOL
V
S
I
S
PARAMETER
Supply Voltage Range
Supply Current
V
S
= 2.7V to 5V
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
●
ALL C AND I GRADE
MIN
TYP
MAX
2.7
0.65
0.75
0.7
0.8
±0.25
±0.25
±0.25
10
10
10
75
80
1
±
0.1
–85
±0.5
±1
±2
10
10
10
(–V
S
)+0.5V
500
±2
2.44
2.60
2.50
2.29
2.50
2.69
2.61
2.52
0.02
0.10
0.20
4.90
4.85
4.75
4.99
4.90
4.81
0.02
0.10
0.20
4.90
4.85
4.65
4.99
4.89
4.80
– 4.99
– 4.90
– 4.80
–4.90
–4.75
–4.65
0.10
0.25
0.35
0.10
0.25
0.35
2.56
11
1.0
1.2
1.2
1.5
±2.5
±2.5
±2.5
ALL H GRADE
MIN
TYP
MAX
2.7
0.65
0.8
0.7
0.9
±0.25
±0.25
±0.25
10
10
10
72
80
1
±0.1
–85
±0.5
±1
±2
10
10
10
11
1.0
1.5
1.2
1.8
±4
±4
±4
UNITS
V
mA
mA
mA
mA
mV
mV
mV
µV/°C
µV/°C
µV/°C
dB
V
S
=
±5V
●
V
OSDIFF
Differential Offset Voltage
(Input Referred) (Note 7)
Differential Offset Voltage Drift
(Input Referred) (Note 7)
Power Supply Rejection Ratio
(Input Referred) (Note 7)
V
S
= 2.7V
V
S
= 5V
V
S
=
±5V
V
S
= 2.7V
V
S
= 5V
V
S
=
±5V
V
S
= 2.7V to
±5V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
∆V
OSDIFF
/∆T
PSRR
G
CM
Common Mode Gain(V
OUTCM
/V
OCM
)
Common Mode Gain Error
Output Balance (∆V
OUTCM
/(∆V
OUTDIFF
) V
OUTDIFF
= –2V to +2V
Common Mode Offset Voltage
(V
OUTCM
– V
OCM
)
Common Mode Offset Voltage Drift
V
S
= 2.7V
V
S
= 5V
V
S
=
±5V
V
S
= 2.7V
V
S
= 5V
V
S
=
±5V
±0.3
–60
±12
±15
±18
±0.35
–60
±15
±17
±20
%
dB
mV
mV
mV
µV/°C
µV/°C
µV/°C
V
OSCM
∆V
OSCM
/∆T
V
OUTCMR
R
INVOCM
I
BVOCM
V
MID
V
OUT
Output Signal Common Mode Range
(Voltage Range for the V
OCM
Pin)
Input Resistance, V
OCM
Pin
Input Bias Current, V
OCM
Pin
Voltage at the V
MID
Pin
Output Voltage, High
(Note 2)
Output Voltage, Low
(Note 2)
Output Voltage, High
(Note 2)
Output Voltage, Low
(Note 2)
Output Voltage, High
(Note 2)
Output Voltage, Low
(Note 2)
V
S
= 2.7V, Load = 10k
V
S
= 2.7V, Load = 5mA
V
S
= 2.7V,Load = 10mA
V
S
= 2.7V, Load = 10k
V
S
= 2.7V, Load = 5mA
V
S
= 2.7V, Load = 10mA
V
S
= 5V, Load = 10k
V
S
= 5V, Load = 5mA
V
S
= 5V, Load = 10mA
V
S
= 5V, Load = 10k
V
S
= 5V, Load = 5mA
V
S
= 5V, Load = 10mA
V
S
=
±5V,
Load = 10k
V
S
=
±5V,
Load = 5mA
V
S
=
±5V,
Load = 10mA
V
S
=
±5V,
Load = 10k
V
S
=
±5V,
Load = 5mA
V
S
=
±5V,
Load = 10mA
V
S
= 2.7V to
±5V
(+V
S
)–1.3V (–V
S
)+0.5V
500
±2
2.43
2.60
2.50
2.29
2.50
2.69
2.61
2.52
0.02
0.10
0.20
4.90
4.80
4.70
4.99
4.90
4.81
0.02
0.10
0.20
4.85
4.80
4.60
4.99
4.89
4.80
–4.98
–4.90
–4.80
(+V
S
)–1.3V
V
MΩ
pA
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
2.57
V
V
V
V
0.10
0.25
0.41
V
V
V
V
V
V
0.10
0.30
0.42
V
V
V
V
V
V
–4.85
–4.75
–4.55
V
V
V
1992f
3
LTC1992 Family
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. +V
S
= 5V, –V
S
= 0V, V
INCM
= V
OUTCM
= V
OCM
= 2.5V, unless otherwise
noted. V
OCM
is the voltage on the V
OCM
pin. V
OUTCM
is defined as (+V
OUT
+ –V
OUT
)/2. V
INCM
is defined as (+V
IN
+ –V
IN
)/2. V
INDIFF
is
defined as (+V
IN
– –V
IN
). V
OUTDIFF
is defined as (+V
OUT
– –V
OUT
). Specifications applicable to all parts in the LTC1992 family.
SYMBOL
I
SC
PARAMETER
Output Short-Circuit Current
Sourcing (Notes 2,3)
Output Short-Circuit Current Sinking
(Notes 2,3)
A
VOL
Large-Signal Voltage Gain
CONDITIONS
V
S
= 2.7V, V
OUT
= 1.35V
V
S
= 5V, V
OUT
= 2.5V
V
S
=
±5V,
V
OUT
= 0V
V
S
= 2.7V, V
OUT
=1.35V
V
S
= 5V, V
OUT
= 2.5V
V
S
=
±5V,
V
OUT
= 0V
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
ALL C AND I GRADE
MIN
TYP
MAX
20
20
20
13
13
13
30
30
30
30
30
30
80
ALL H GRADE
MIN
TYP
MAX
20
20
20
13
13
13
30
30
30
30
30
30
80
UNITS
mA
mA
mA
mA
mA
mA
dB
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
+V
S
= 5V, –V
S
= 0V, V
INCM
= V
OUTCM
= V
OCM
= 2.5V, unless otherwise noted. V
OCM
is the voltage on the V
OCM
pin. V
OUTCM
is defined as
(+V
OUT
+ –V
OUT
)/2. V
INCM
is defined as (+V
IN
+ –V
IN
)/2. V
INDIFF
is defined as (+V
IN
– –V
IN
). V
OUTDIFF
is defined as (+V
OUT
– –V
OUT
).
Specifications applicable to the LTC1992 only.
LTC1992CMS8
LTC1992ISM8
MIN
TYP
MAX
●
●
●
●
SYMBOL
I
B
I
OS
R
IN
C
IN
e
n
i
n
V
INCMR
CMRR
SR
GBW
PARAMETER
Input Bias Current
Input Offset Current
Input Resistance
Input Capacitance
CONDITIONS
V
S
= 2.7V to
±5V
V
S
= 2.7V to
±5V
LTC1992HMS8
MIN
TYP
MAX
2
0.1
500
3
35
1
69
0.5
90
1.5
3.2
3.5
4.0
UNITS
pA
pA
MΩ
pF
nV/√Hz
fA/√Hz
V
dB
V/µs
MHz
MHz
MHz
2
0.1
500
3
35
1
250
100
400
150
Input Referred Noise Voltage Density f = 1kHz
Input Noise Current Density
Input Signal Common Mode Range
Common Mode Rejection Ratio
(Input Referred)
Slew Rate (Note 4)
Gain-Bandwidth Product
(f
TEST
= 100kHz)
T
A
= 25°C
LTC1992CMS8
LTC1992IMS8/
LTC1992HMS8
V
INCM
= –0.1V to 3.7V
f = 1kHz
●
●
●
●
●
(–V
S
)– 0.1V (+V
S
)– 1.3V (–V
S
)– 0.1V (+V
S
)– 1.3V
69
0.5
3.0
2.5
1.9
90
1.5
3.2
3.0
3.5
4.0
4.0
3.0
1.9
1992f
4
LTC1992 Family
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. +V
S
= 5V, –V
S
= 0V, V
INCM
= V
OUTCM
= V
OCM
= 2.5V, unless otherwise
noted. V
OCM
is the voltage on the V
OCM
pin. V
OUTCM
is defined as (+V
OUT
+ –V
OUT
)/2. V
INCM
is defined as (+V
IN
+ –V
IN
)/2. V
INDIFF
is
defined as (+V
IN
– –V
IN
). V
OUTDIFF
is defined as (+V
OUT
– –V
OUT
). Typical values are at T
A
= 25°C. Specifications apply to the
LTC1992-1 only.
LTC1992-1CMS8
LTC1992-1IMS8
MIN
TYP
MAX
●
●
●
ELECTRICAL CHARACTERISTICS
SYMBOL
G
DIFF
PARAMETER
Differential Gain
Differential Gain Error
Differential Gain Nonlinearity
Differential Gain Temperature Coefficient
CONDITIONS
LTC1992-1HMS8
MIN
TYP
MAX
1
±0.1
50
3.5
45
22
55
0.5
30
– 0.1V to 4.9V
60
1.5
3
±0.35
UNITS
V/V
%
ppm
ppm/°C
nV/√Hz
kΩ
V
dB
V/µs
MHz
1
±0.1
50
3.5
45
22.5
55
0.5
30
60
1.5
3
±0.3
e
n
R
IN
V
INCMR
CMRR
SR
GBW
Input Referred Noise Voltage Density (Note 7) f = 1kHz
Input Resistance, Single-Ended +IN, –IN Pins
Input Signal Common Mode Range
Common Mode Rejection Ratio
(Amplifier Input Referred) (Note 7)
Slew Rate (Note 4)
Gain-Bandwidth Product
f
TEST
= 180kHz
V
S
= 5V
V
INCM
= –0.1V to 3.7V
●
●
37.5
38
– 0.1V to 4.9V
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
+V
S
= 5V, –V
S
= 0V, V
INCM
= V
OUTCM
= V
OCM
= 2.5V, unless otherwise noted. V
OCM
is the voltage on the V
OCM
pin. V
OUTCM
is defined as
(+V
OUT
+ –V
OUT
)/2. V
INCM
is defined as (+V
IN
+ –V
IN
)/2. V
INDIFF
is defined as (+V
IN
– –V
IN
). V
OUTDIFF
is defined as (+V
OUT
– –V
OUT
).
Typical values are at T
A
= 25°C. Specifications apply to the LTC1992-2 only.
LTC1992-2CMS8
LTC1992-2IMS8
MIN
TYP
MAX
●
●
●
SYMBOL
G
DIFF
PARAMETER
Differential Gain
Differential Gain Error
Differential Gain Nonlinearity
Differential Gain Temperature Coefficient
CONDITIONS
LTC1992-2HMS8
MIN
TYP
MAX
2
±0.1
50
3.5
45
22
55
0.7
30
– 0.1V to 4.9V
60
2
4
±0.35
UNITS
V/V
%
ppm
ppm/°C
nV/√Hz
kΩ
V
dB
V/µs
MHz
2
±0.1
50
3.5
45
22.5
55
0.7
30
60
2
4
±0.3
e
n
R
IN
V
INCMR
CMRR
SR
GBW
Input Referred Noise Voltage Density (Note 7) f = 1kHz
Input Resistance, Single-Ended +IN, –IN Pins
Input Signal Common Mode Range
Common Mode Rejection Ratio
(Amplifier Input Referred) (Note 7)
Slew Rate (Note 4)
Gain-Bandwidth Product
f
TEST
= 180kHz
V
S
= 5V
V
INCM
= –0.1V to 3.7V
●
●
37.5
38
– 0.1V to 4.9V
1992f
5
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