LM146
LM246
LM346
PROGRAMMABLE
QUAD BIPOLAR OPERATIONAL AMPLIFIER
N
DIP16
(Plastic Package)
■ PROGRAMMABLE ELECTRICAL CHARAC-
TERISTICS
■ LOW SUPPLY CURRENT (250
µ
A/amplifier)
■ GAIN-BANDWITH PRODUCT : 1MHz
■ LARGE DC VOLTAGE GAIN : 120dB
■ LOW NOISE VOLTAGE : 28nV/
√
Hz
■ WIDE POWER SUPPLY RANGE / ±1.5V to
±22V
■ CLASSE AB OUTPUT STAGE. NO
CROSS-OVER DISTORTION
■ OVERLOAD PROTECTION FOR INPUTS
AND OUTPUTS
DESCRIPTION
The LM346 consists of four independent, high gain, internally compensated, low power programmable amplifiers. Two external resistors (R set
) allow the user to program the gain-bandwith product, slew rate, supply current, input bias current, input offset current and input noise. For example the user can trade-off supply current for bandwith or optimize noise figure for a given source resistance. In a similar way other amplifier characteristics can be tailored to the application.
Except for the two programming pins at the end of the package the LM346 pin out is the same as the
LM324 and LM348.
PIN CONNECTIONS (top view)
PROGRAMMING EQUATIONS :
Total supply current = 1mA (I set
= 10
µ
A)
Gain bandwith product = 1MHz (I set
Slew rate = 0.5V/
µ s (I set
= 10
µΑ)
Input bias current
≈
30nA (I
= 10 set
= 10
µΑ)
µ
A)
O u tp u t 1 1 1 6 O u tp u t 4
In v e rtin g In p u t 1 2 1 5 In v e rtin g In p u t 4
I set
= current into pin 8 and pin 9 (see schematic diagram)
I se t
Vcc + – Vcc set
-
– 0.6 V
-----------------------------------------------------
R
CC
+
N o n -in v e rtin g in p u t 4 + +
Obsolete Product(s) - Obsolete Product(s)
=
N o n -in v e rtin g in p u t 1
V
N o n -in v e rtin g In p u t 2
3
4
5
1 4
1 2
V CC
-
N o n -in v e rtin g in p u t 3
In v e rtin g in p u t 3
In v e rtin g In p u t 2 6 1 1
ORDER CODE
O u tp u t 2
7 1 0 O u tp u t 3
Set 8 Package 9 Set
Part
Number
Temperature
Range
LM146
LM246
-55°C, +125°C
-40°C, +105°C
LM346 0°C, +70°C
Example : LM246N
N
•
•
•
N = Dual in Line Package (DIP))
April 2003 1/4
LM146-LM246-LM346
SCHEMATIC DIAGRAM (1/4 LM146)
ABSOLUTE MAXIMUM RATINGS
1.
2.
Symbol
V
V
CC
V i id
Parameter
Supply voltage l Input Voltage
1)
Differential Input Voltage
Output Short-circuit Duration
2)
Value
±22
±15
±30
Infinite
Unit
V
V
V
P tot
Power Dissipation 500 mW
T oper
Opearting Free-air Temperature Range
LM146
LM246
LM346
-55 to +125
40 to +105
0 to +70-
°C
T stg
Storage Temperature Range -65 to +150 °C
For supply voltage less than ±15V, the absolute maximum input voltage is equal to the supply voltage.
Any of the amplifier outputs can be shorted to ground indefinitly; however more than one should not be simultaneously shorted as the maximum junction will be exceeded.
Obsolete Product(s) - Obsolete Product(s)
2/4
LM146-LM246-LM346
ELECTRICAL CHARACTERISTICS
V
CC
+ = ±15V, I set
= 10
µ
A, T amb
= +25°C (unless otherwise specified)
LM146 LM246 - LM346
Symbol Parameter Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
V io
I io
I ib
A vd
SVR
I cc
V icm
CMR
Input Offset Voltage (R s
≤
10k
Ω
)
T amb
= 25°C
T min
≤
T amb
≤
T max
Input Offset Current
T amb
= 25°C
T min
≤
T amb
≤
T max
Input Bias Current
T amb
= 25°C
T min
≤
T amb
≤
T max
Large Signal Voltage Gain
(V o
= ±10V, R
L
= 10k
Ω)
T amb
= 25°C
T min
≤
T amb
≤
T max
Supply Voltage Rejection Ratio (R s
≤
10k
Ω
)
T amb
= 25°C
T min
≤
T amb
≤
T max
Supply Current, all Amp, no load
T amb
= 25°C
T min
≤
T amb
≤
T max
Input Common Mode Voltage Range
T amb
= 25°C
T min
≤
T amb
≤
T max
Common Mode Rejection Ratio (R s
≤
10k
Ω
)
T amb
= 25°C
T min
≤
T amb
≤
T max
100
50
80
80
±13.5
±13.5
80
70
0.5
2
30
1000
110
1
110
3
5
20
25
100
100
2
2
50
25
80
80
±13.5
±13.5
80
70
0.5
2
30
1000
110
1
110
5
6
100
100
250
250
2
2 mV nA nA
V/mV dB mA dB
I os
±V opp
SR
Output Short-circuit Current
T amb
= 25°C
T min
≤
T amb
≤
T max
Output Voltage Swing (R
L
≤
10k
Ω
)
T amb
= 25°C
T min
≤
T amb
≤
T max
Slew Rate (V
I
= ±10V, R
L
= 10k
Ω
, C
L
= 100pF, unity Gain)
10
4
12
12
0.3
20
14
0.5
30
35
10
4
12
12
0.3
20
14
0.5
30
35 mA
V
V/
µ s
R
C
I
Input Resistance 1 1 M
Ω Obsolete Product(s) - Obsolete Product(s)
I
Input Capacitance 2 2 pF
Channel Separation (R
L
= 10k
Ω
, Vo = 12V pp
) V o1
/V o2
120 120 dB
GBP
Gain Bandwith Product
(V
I
= 10 mV, R
L
= 10k
Ω
, C
L
= 100pF
f =100kHz) 0.8
1 0.5
1
MHz
THD
Total Harmonic Distortion
(f = 1kHz, A v
= 20dB, R
L
= 10k
Ω
C
L
= 100pF, V o
= 2V pp
) 0.015
0.015
% e n
Equivalent Input Noise Voltage
(f = 1kHz, R s
= 100
Ω
28 28 Hz
3/4
LM146-LM246-LM346
PACKAGE MECHANICAL DATA
16 PINS - PLASTIC PACKAGE
Dim.
Millimeters
Typ.
Max.
Min.
0.020
0.030
Inches
Typ.
Max.
D
E e e3
F i
L
Z a1
B b b1
Min.
0.51
0.77
0.5
0.25
8.5
2.54
17.78
3.3
1.65
20
7.1
5.1
0.020
0.010
0.335
0.100
0.700
0.130
0.065
0.787
0.280
0.201
1.27
0.050
Obsolete Product(s) - Obsolete Product(s)
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 2003 STMicroelectronics - All Rights Reserved
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