P-1
LTC321H
General Description
The LTC321H of single-channel amplifier provides input offset voltage correction for low
offset (maximum 600 µV) and drift (1 µV/℃) through the use of proprietary
techniques. Featuring rail-to-rail input and output swings, and low quiescent current
(typical 90 µA) combined with a wide bandwidth of 1.2 MHz and very low noise (30
nV/√Hz at 1 kHz) makes this family very attractive for a variety of battery-powered
applications such as handsets, tablets, notebooks, and portable medical devices. The low
input bias current supports these amplifiers to be used in applications with mega-ohm
source impedances.
The robust design of the LTC321H amplifier provides ease-of-use to the circuit designer:
unity-gain stability with capacitive loads of up to 500 pF, integrated RF/EMI rejection
filter, no phase reversal in overdrive conditions, and high electro-static discharge (ESD)
protection (4-kV HBM).
The LTC321H amplifier is optimized for operation at voltages as low as +1.8 V (±0.9 V)
and up to +5.5 V (±2.75 V) at the temperature range of 0 ℃ to 70 ℃, and operation at
voltages from +2.0 V (±1.0 V) to +5.5 V (±2.75 V) over the extended temperature range
of −40 ℃ to +125 ℃.
The LTC321H is available in both SOT23-5 and SC70-5 packages.
Features and Benefits
1.2 MHz GBW for Unity-Gain Stable
Precision: ±600 μV Maximum Input Offset Voltage
Low Noise: 30 nV/√Hz at 1 kHz
Micro-Power: 90 μA Supply Current Per Amplifier
Single 1.8 V to 5.5 V Supply Voltage Range at 0 ℃ to 70 ℃
Rail-to-Rail Input and Output
Internal RF/EMI Filter
Extended Temperature Range: −40℃ to +125℃
Applications
Battery-Powered Instruments:
– Consumer, Industrial, Medical, Notebooks
Wireless Charger
Audio Outputs
Sensor Signal Conditioning:
– Sensor Interfaces, Loop-Powered, Active Filters
Wireless Sensors:
– Home Security, Remote Sensing, Wireless Metering
Pin Configurations (Top View)
LTC321H
SOT23-5 / SC70-5
﹢IN
1
﹣VS
2
﹣IN
3
5
﹢VS
4
OUT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
P-2
LTC321H
Pin Description
Symbol
Description
–IN
Inverting input of the amplifier. The voltage range is from (VS– – 0.1V) to (VS+ + 0.1V).
+IN
Non-inverting input of the amplifier. This pin has the same voltage range as –IN.
+VS
Positive power supply. The voltage is from 2.0V to 5.5V. Split supplies are possible
as long as the voltage between VS+ and VS– is from 2.0V to 5.5V.
–VS
Negative power supply. It is normally tied to ground. It can also be tied to a voltage
other than ground as long as the voltage between VS+ and VS– is from 2.0V to 5.5V.
OUT
Amplifier output.
Ordering Information
Type Number
Package Name
Package Quantity
Marking Code
LTC321HXT5/R6
SOT23-5
Tape and Reel, 3 000
321xxx
LTC321HXC5/R6
SC70-5
Tape and Reel, 3 000
321xxx
Limiting Value
In accordance with the Absolute Maximum Rating System (IEC 60134).
Parameter
Absolute Maximum Rating
Supply Voltage, VS+ to VS–
10.0V
Signal Input Terminals: Voltage, Current
VS– – 0.5V to VS+ + 0.5V, ±20mA
Output Short-Circuit
Continuous
Storage Temperature Range
–65℃ to +150℃
Junction Temperature
150℃
Lead Temperature Range (Soldering 10 sec)
260℃
HBM ±4 000V
Electrostatic Discharge Voltage
CDM ±2 000V
MM ±400V
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
LTC321H
P-3
Electrical Characteristics
VS = 5.0V, TA = +25℃, VCM = VS /2, VO = VS /2, and RL = 10kΩ connected to VS /2, unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = −40 to +125 ℃.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
±200
±600
μV
±1
3.5
μV/℃
OFFSET VOLTAGE
VOS
Input offset voltage
VOS TC
Offset voltage drift
TA = −40 to +125 ℃
PSRR
Power supply
rejection ratio
VS = 2.0 to 5.5 V, VCM < VS+ − 2V
80
TA = −40 to +125 ℃
75
110
dB
INPUT BIAS CURRENT
1
IB
Input bias current
IOS
Input offset current
TA = +85 ℃
150
TA = +125 ℃
500
pA
5
pA
6
μVP-P
NOISE
Vn
Input voltage noise
f = 0.1 to 10 Hz
en
Input voltage noise
density
f = 10 kHz
27
f = 1 kHz
30
In
Input current noise
density
f = 1 kHz
10
nV/√Hz
fA/√Hz
INPUT VOLTAGE
VCM
CMRR
Common-mode
voltage range
Common-mode
rejection ratio
VS––0.1
VS = 5.5 V, VCM = −0.1 to 5.6 V
78
VCM = 0 to 5.3 V, TA = −40 to +125 ℃
72
VS = 2.0 V, VCM = −0.1 to 2.1 V
72
VCM = 0 to 1.8 V, TA = −40 to +125 ℃
66
VS++0.1
V
92
83
dB
INPUT IMPEDANCE
CIN
Input capacitance
Differential
2.0
Common mode
3.5
pF
OPEN-LOOP GAIN
AVOL
Open-loop voltage
gain
RL = 50 kΩ, VO = 0.05 to 3.5 V
90
TA = −40 to +125 ℃
85
RL = 2 kΩ, VO = 0.15 to 3.5 V
85
TA = −40 to +125 ℃
80
105
100
dB
FREQUENCY RESPONSE
GBW
Gain bandwidth
product
SR
Slew rate
G = +1, CL = 100 pF,
VO = 1.5 to 3.5 V
THD+N
Total harmonic
distortion + noise
G = +1, f = 1 kHz, VO = 1 VRMS
tS
Settling time
tOR
Overload recovery
time
1.2
MHz
1
V/μs
0.005
%
To 0.1%, G = +1, 1V step
1.5
To 0.01%, G = +1, 1V step
1.8
To 0.1%, VIN * Gain > VS
2.5
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
μs
μs
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
LTC321H
P-4
Electrical Characteristics (continued)
VS = 5.0V, TA = +25℃, VCM = VS /2, VO = VS /2, and RL = 10kΩ connected to VS /2, unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = −40 to +125 ℃.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
OUTPUT
VOH
High output voltage
swing
RL = 50 kΩ
VS+–6
VS+–3
RL = 2 kΩ
VS+–100
VS+–65
VOL
Low output voltage
swing
RL = 50 kΩ
VS–+2
VS–+4
RL = 2 kΩ
VS–+42
VS–+65
ISC
Short-circuit current
Source current through 10Ω
40
Sink current through 10Ω
50
mV
mV
mA
POWER SUPPLY
VS
Operating supply
voltage
IQ
Quiescent current
(per amplifier)
TA = 0 to +70 ℃
1.8
5.5
TA = −40 to +125 ℃
2.0
5.5
90
TA = −40 to +125 ℃
135
170
V
μA
THERMAL CHARACTERISTICS
TA
Operating
temperature range
θJA
Package Thermal
Resistance
–40
+125
SC70-5
333
SOT23-5
190
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
℃
℃/W
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
LTC321H
P-5
Typical Performance Characteristics
At TA = +25℃, VCM = VS /2, and RL = 10kΩ connected to VS /2, unless otherwise noted.
CL=100pF
1V/div
50mV/div
CL=100pF
0.4μs/div
5μs/div
Large Signal Step Response.
Small Signal Step Response.
150
80
120
60
90
40
60
20
30
0
0
-20
-30
-40
1
10
100
1k
Voltage Noise (nV/√Hz)
100
1,000
Phase (deg)
180
AVOL (dB)
120
100
-60
10k 100k 1M 10M
10
1
1
100
Frequency (Hz)
Open-loop Gain and Phase as a function of
Frequency.
100
1M
Input Voltage Noise Spectral Density as a function of
Frequency.
140
90
120
80
100
CMRR (dB)
70
PSRR (dB)
10k
Frequency (Hz)
60
50
40
30
80
60
40
20
20
10
0
0
10
100
1k
10k
100k
1M
10
Frequency (Hz)
Power Supply Rejection Ratio as a function of
Frequency.
100
1k
10k
100k
1M
Frequency (Hz)
Common-mode Rejection Ratio as a function of
Frequency.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
LTC321H
P-6
Typical Performance Characteristics (continued)
At TA = +25℃, VCM = VS /2, and RL = 10kΩ connected to VS /2, unless otherwise noted.
150
Quiescent Current (μA)
Quiescent Current (μA)
150
125
100
75
50
25
0
120
90
60
30
0
1.5
2
2.5
3
3.5
4
4.5
5
5.5
-50
-25
Supply Voltage (V)
Quiescent Current as a function of Supply Voltage.
50
75
100
50
–ISC
40
30
+ISC
20
10
0
65
–ISC
60
55
50
45
+ISC
40
35
30
25
20
2
2.5
3
3.5
4
4.5
5
-50
Short-circuit Current as a function of Supply
Voltage.
600
Sourcing Current
Distribution (Unit)
4
–40℃
125℃
25℃
2
1
0
25
50
75
100
Sinking Current
500
VS = 5V
VCM = –VS
5,000 Sampels
400
300
200
100
0
0
10
20
30
40
50
125
Short-circuit Current as a function of Temperature.
5
3
-25
Temperature (℃)
Supply Voltage (V)
0
125
70
Short-circuit Current (mA)
Short-circuit Current (mA)
25
Quiescent Current as a function of Temperature.
60
Output Voltage (V)
0
Temperature (℃)
60
70
Offset Voltage (μV)
Output Current (mA)
Output Voltage Swing as a function of Output
Current.
Offset Voltage Production Distribution
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
P-7
LTC321H
Application Notes
LOW INPUT BIAS CURRENT
The LTC321H device is a CMOS op-amp and features very
low input offset voltage and input bias current. The low
input bias current allows the amplifiers to be used in
applications with high resistance sources. Care must be
taken to minimize PCB Surface Leakage. See below section
on “PCB Surface Leakage” for more details.
resistive loads (e.g. 100kΩ), the output voltage can typically
swing to within 5mV from the supply rails. With moderate
resistive loads (e.g. 10kΩ), the output can typically swing to
within 10mV from the supply rails and maintain high openloop gain. See the Typical Characteristic curve, Output
Voltage Swing as a function of Output Current, for more
information.
6.0
In applications where low input bias current is critical,
Printed Circuit Board (PCB) surface leakage effects need to
be considered. Surface leakage is caused by humidity, dust
or other contamination on the board. Under low humidity
conditions, a typical resistance between nearby traces is
1012Ω. A 5V difference would cause 5pA of current to flow,
which is greater than the LTC321H’s input bias current at
+25℃ (±1pA, typical). It is recommended to use multi-layer
PCB layout and route the op-amp’s –IN and +IN signal
under the PCB surface.
The effective way to reduce surface leakage is to use a
guard ring around sensitive pins (or traces). The guard ring
is biased at the same voltage as the sensitive pin. An
example of this type of layout is shown in Figure 1 for
Inverting Gain application.
1. For Non-Inverting Gain and Unity-Gain Buffer:
a) Connect the non-inverting pin (+IN) to the input
with a wire that does not touch the PCB surface.
b) Connect the guard ring to the inverting input pin
(–IN). This biases the guard ring to the Common
Mode input voltage.
2. For Inverting Gain and Trans-impedance Gain Amplifiers
(convert current to voltage, such as photo detectors):
a) Connect the guard ring to the non-inverting input
pin (+IN). This biases the guard ring to the same
reference voltage as the op-amp (e.g., VS/2 or
ground).
b) Connect the inverting pin (–IN) to the input with a
wire that does not touch the PCB surface.
5.0
Guard
Ring
+IN
–IN
+VS
Figure 1. Use a guard ring around sensitive pins
AMPLITUDE (V)
PCB SURFACE LEAKAGE
4.0
3.0
2.0
1.0
0.0
-1.0
0
10
20
30
40
50
60
TIME (ms)
Figure 2. No Phase Inversion with Inputs Greater Than the
Power-Supply Voltage
The maximum output current is a function of total supply
voltage. As the supply voltage to the amplifier increases,
the output current capability also increases. Attention must
be paid to keep the junction temperature of the IC below
150℃ when the output is in continuous short-circuit. The
output of the amplifier has reverse-biased ESD diodes
connected to each supply. The output should not be forced
more than 0.5V beyond either supply, otherwise current will
flow through these diodes.
CAPACITIVE LOAD AND STABILITY
The LTC321H can directly drive 500 pF in unity-gain without
oscillation. The unity-gain follower (buffer) is the most
sensitive configuration to capacitive loading. Direct
capacitive loading reduces the phase margin of amplifiers
and this results in ringing or even oscillation. Applications
that require greater capacitive drive capability should use
an isolation resistor between the output and the capacitive
load like the circuit in Figure 3. The isolation resistor RISO
and the load capacitor CL form a zero to increase stability.
The bigger the RISO resistor value, the more stable VOUT will
be. Note that this method results in a loss of gain accuracy
because RISO forms a voltage divider with the RL.
GROUND SENSING AND RAIL TO RAIL
The input common-mode voltage range of the LTC321H
amplifier extends 100mV beyond the supply rails. This is
achieved with a complementary input stage—an N-channel
input differential pair in parallel with a P-channel
differential pair. For normal operation, inputs should be
limited to this range. The absolute maximum input voltage
is 500mV beyond the supplies. Inputs greater than the input
common-mode range but less than the maximum input
voltage, while not valid, will not cause any damage to the
op-amp. Unlike some other op-amps, if input current is
limited, the inputs may go beyond the supplies without
phase inversion, as shown in Figure 2. Since the input
common-mode range extends from (VS− − 0.1V) to (VS+ +
0.1V), the LTC321H op-amp can easily perform ‘true ground’
sensing.
A topology of class AB output stage with common-source
transistors is used to achieve rail-to-rail output. For light
RISO
VOUT
VIN
CL
Figure 3. Indirectly Driving Heavy Capacitive Load
An improvement circuit is shown in Figure 4. It provides DC
accuracy as well as AC stability. The RF provides the DC
accuracy by connecting the inverting signal with the output.
The CF and RISO serve to counteract the loss of phase
margin by feeding the high frequency component of the
output signal back to the amplifier’s inverting input, thereby
preserving phase margin in the overall feedback loop.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
P-8
LTC321H
Application Notes (continued)
CF
RF
RISO
VOUT
VIN
CL
RL
Figure 4. Indirectly Driving Heavy Capacitive Load with DC
Accuracy
For no-buffer configuration, there are two others ways to
increase the phase margin: (a) by increasing the amplifier’s
gain, or (b) by placing a capacitor in parallel with the
feedback resistor to counteract the parasitic capacitance
associated with inverting node.
POWER SUPPLY LAYOUT AND BYPASS
The LTC321H amplifier operates from either a single +2.0V
to +5.5V supply or dual ±1.0V to ±2.75V supplies. For
single-supply operation, bypass the power supply VS with a
ceramic capacitor (i.e. 0.01μF to 0.1μF) which should be
placed close (within 2mm for good high frequency
performance) to the VS pin. For dual-supply operation, both
the VS+ and the VS– supplies should be bypassed to ground
with separate 0.1μF ceramic capacitors. A bulk capacitor
(i.e. 2.2μF or larger tantalum capacitor) within 100mm to
provide large, slow currents and better performance. This
bulk capacitor can be shared with other analog parts.
Good PC board layout techniques optimize performance by
decreasing the amount of stray capacitance at the op-amp’s
inputs and output. To decrease stray capacitance, minimize
trace lengths and widths by placing external components
as close to the device as possible. Use surface-mount
components whenever possible. For the op-amp, soldering
the part to the board directly is strongly recommended. Try
to keep the high frequency big current loop area small to
minimize the EMI (electromagnetic interfacing).
GROUNDING
A ground plane layer is important for the LTC321H circuit
design. The length of the current path speed currents in an
inductive ground return will create an unwanted voltage
noise. Broad ground plane areas will reduce the parasitic
inductance.
INPUT-TO-OUTPUT COUPLING
To minimize capacitive coupling, the input and output signal
traces should not be parallel. This helps reduce unwanted
positive feedback.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
LTC321H
P-9
Typical Application Circuits
The LTC321H amplifier has input bias current in the pA
range. This is ideal in buffering high impedance chemical
sensors, such as pH probes. As an example, the circuit in
Figure 7 eliminates expansive low-leakage cables that that
is required to connect a pH probe (general purpose
combination pH probes, e.g Corning 476540) to metering
ICs such as ADC, AFE and/or MCU. A LTC321H op-amp and
a lithium battery are housed in the probe assembly. A
conventional low-cost coaxial cable can be used to carry
the op-amp’s output signal to subsequent ICs for pH
reading.
DIFFERENTIAL AMPLIFIER
R2
R1
Vn
VOUT
Vp
R3
R4
VREF
SHUNT-BASED CURRENT SENSING AMPLIFIER
Figure 5. Differential Amplifier
The circuit shown in Figure 5 performs the difference
function. If the resistors ratios are equal R4/R3 = R2/R1, then:
VOUT = (Vp – Vn) × R2/R1 + VREF
INSTRUMENTATION AMPLIFIER
RG
VREF
R1
R2
R2
R1
VOUT
V1
V2
VOUT =(V1 V2 )(1
R1 2 R1
) VREF
R2 RG
Figure 6. Instrumentation Amplifier
The LTC321H amplifier is well suited for conditioning sensor
signals in battery-powered applications. Figure 6 shows a
two op-amp instrumentation amplifier, using the LTC321H
op-amp. The circuit works well for applications requiring
rejection of common-mode noise at higher gains. The
reference voltage (VREF) is supplied by a low-impedance
source. In single voltage supply applications, the VREF is
typically VS/2.
The current sensing amplification shown in Figure 8 has a
slew rate of 2πfVPP for the output of sine wave signal, and
has a slew rate of 2fVPP for the output of triangular wave
signal. In most of motor control systems, the PWM
frequency is at 10kHz to 20kHz, and one cycle time is 100μs
for a 10kHz of PWM frequency. In current shunt monitoring
for a motor phase, the phase current is converted to a
phase voltage signal for ADC sampling. This sampling
voltage signal must be settled before entering the ADC. As
the Figure 8 shown, the total settling time of a current
shunt monitor circuit includes: the rising edge delay time
(tSR) due to the op-amp’s slew rate, and the measurement
settling time (tSET). For a 3-shunt solution in motor phase
current sensing, if the smaller duty cycle of the PWM is
defined at 45% (In fact, the phase with minimum PWM duty
cycle, such as 5%, is not detected current directly, and it
can be calculated from the other two phase currents), and
the tSR is required at 20% of a total time window for a phase
current monitoring, in case of a 3.3V motor control system
(3.3V MCU with 12-bit ADC), the op-amp’s slew rate should
be more than:
3.3V / (100μs× 45% × 20%) = 0.37 V/μs
At the same time, the op-amp’s bandwidth should be much
greater than the PWM frequency, like 10 time at least.
tSR
VBUS
tSET
BUFFERED CHEMICAL SENSORS
High side
switch
R1
10MΩ
3V
To ADC,
AFE or MCU
VM
Low side
switch
R2
pH
PROBE
R1
RSHUNT
R2
10MΩ
tSR – Time delay due to op-amp slew rate
tSET – Measurement settling time
tSMP – Sampling time window
To Motor Phase
Coax
tSMP
C1
To MCU
ADC pin
R3
R4
R5
C2
All components contained within the pH probe
Filter
Figure 7. Buffered pH Probe
Offset
Amplification
Figure 8. Current Shunt Monitor Circuit
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
P-10
LTC321H
Tape and Reel Information
REEL DIMENSIONS
TAPE DIMENSIONS
K0
P1
B0 W
Reel
Diameter
A0
Cavity
A0
B0
K0
W
P1
Reel
Width (W1)
Dimension designed to accommodate the component width
Dimension designed to accommodate the component length
Dimension designed to accommodate the component thickness
Overall width of the carrier tape
Pitch between successive cavity centers
QUADRANT ASSIGNMENTS FOR PIN 1 ORIETATION IN TAPE
Sprocket Holes
Q1
Q2
Q1
Q2
Q3
Q4
Q3
Q4
User Direction of Feed
Pocket Quadrants
* All dimensions are nominal
Device
LTC321HXT5/R6
Package
Pins
Type
SOT23
5
SPQ
3 000
Reel
Reel
Diameter Width W1
(mm)
(mm)
178
9.0
A0
(mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
(mm)
Pin 1
Quadrant
3.3
3.2
1.5
4.0
8.0
Q3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
LTC321H
P-11
Package Outlines
DIMENSIONS, SOT23-5
A2
A
A1
D
e1
Symbol
A
A1
A2
b
c
D
E1
E
e
e1
L
L1
θ
θ
L
E
E1
L1
e
b
Dimensions
In Millimeters
Min
Max
1.35
0.00
0.15
1.00
1.20
0.35
0.45
0.14
0.20
2.82
3.02
1.526
1.726
2.60
3.00
0.95 BSC
1.90 BSC
0.60 REF
0.30
0.60
0°
8°
Dimensions
In Inches
Min
Max
0.053
0.000
0.006
0.039
0.047
0.014
0.018
0.006
0.008
0.111
0.119
0.060
0.068
0.102
0.118
0.037 BSC
0.075 BSC
0.024 REF
0.012
0.024
0°
8°
c
RECOMMENDED SOLDERING FOOTPRINT, SOT23-5
1.0
0.039
0.95
0.037
0.95
0.037
0.7
0.028
2.4
0.094
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
mm
( inches
)
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
P-12
LTC321H
Package Outlines (continued)
DIMENSIONS, SC70-5 (SOT353)
A2
A
Symbol
A1
D
e1
A
A1
A2
b
C
D
E
E1
e
e1
L
L1
θ
θ
e
L
E1
E
L1
b
Dimensions
In Millimeters
Min
Max
0.90
1.10
0.00
0.10
0.90
1.00
0.15
0.35
0.08
0.15
2.00
2.20
1.15
1.35
2.15
2.45
0.65 typ.
1.20
1.40
0.525 ref.
0.26
0.46
0°
8°
C
RECOMMENDED SOLDERING FOOTPRINT, SC70-5 (SOT353)
0.50
0.0197
0.65
0.0256
0.65
0.0256
0.40
0.0157
1.9
0.0748
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
mm
( inches
)
Dimensions
In Inches
Min
Max
0.035
0.043
0.000
0.004
0.035
0.039
0.006
0.014
0.003
0.006
0.079
0.087
0.045
0.053
0.085
0.096
0.026 typ.
0.047
0.055
0.021 ref.
0.010
0.018
0°
8°
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
P-13
LTC321H
IMPORTANT NOTICE
Linearin is a global fabless semiconductor company specializing in advanced high-performance highquality analog/mixed-signal IC products and sensor solutions. The company is devoted to the innovation
of high performance, analog-intensive sensor front-end products and modular sensor solutions, applied
in multi-market of medical & wearable devices, smart home, sensing of IoT, and intelligent industrial &
smart factory (industrie 4.0). Linearin’s product families include widely-used standard catalog products,
solution-based application specific standard products (ASSPs) and sensor modules that help customers
achieve faster time-to-market products. Go to http://www.linearin.com for a complete list of Linearin
product families.
For additional product information, or full datasheet, please contact with the Linearin’s Sales Department
or Representatives.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1617-34.0c — Data Sheet
General-Purpose, Micro-Power 1.2MHz, RRIO, Precision Amplifiers
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