ST LM146, LM246, LM346 User Manual
LM146
LM146
LM246 - LM346
PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIERS
.PROGRAMMABLE ELECTRICAL CHARAC-
.TERISTICS
.BATTERY POWERED OPERATION
.LOW SUPPLY CURRENT (250μA/amplifier)
.GAIN-BANDWIDTH PRODUCT : 1MHz
.LARGE DC VOLTAGE GAIN : 120dB
.LOW NOISE VOLTAGE : 28nV/VHz
WIDE POWER SUPPLY RANGE : ±1.5V to
.±22V
CLASSE AB OUTPUT STAGE. NO CROSS-
.OVER DISTORTION
OVERLOAD PROTECTION FOR INPUTS AND OUTPUTS
N |
D |
DIP16 |
SO16 |
(Plastic Package) |
(Plastic Micropackage) |
ORDER CODES
DESCRIPTION
The LM346 consists of four independent, high gain, internally compensated, low power programmable amplifiers. Two external resistors (Rset) 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 bandwidth 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.
PROGRAMMING EQUATIONS :
Total supply current = 1mA (Iset = 10μA) Gain-bandwidthproduct = 1MHz (Iset = 10μA) Slew rate = 0.5V/μs (Iset = 10μA)
Input bias current ≈30 nA (Iset = 10μA) Iset = current into pin 8 and pin 9
(see schematic diagram)
Iset = VCC + − VCC − − 0.6V
Rset
Part |
Temperature |
Package |
|
Number |
Range |
N |
D |
|
|
||
LM146 |
±55oC, +125oC |
• |
• |
LM246 |
±40oC, +105oC |
• |
• |
LM346 |
0oC, +70oC |
• |
• |
Example : LM246N
PIN CONNECTIONS (top view)
Output1 |
1 |
16 |
Output4 |
Inverting input 1 |
2 |
15 |
Inverting input 4 |
Non-invertinginput 1 |
3 |
14 |
Non-invertinginput 4 |
V + |
4 |
13 |
VCC |
CC |
|
|
|
Non-invertinginput 2 |
5 |
12 |
Non-invertinginput 3 |
Inverting input 2 |
6 |
11 |
Inverting input 3 |
Output2 |
7 |
10 |
Output 3 |
Set |
8 |
9 |
Set |
November 1997 |
1/9 |
SCHEMATIC DIAGRAM (1/4 LM146)
Q15
Q16
Q10
Inverting |
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Q12 |
|
input |
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Non- |
Q14 |
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inverting |
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Q1 |
Q2 |
input |
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C C |
Q11 |
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8pF |
Q13 |
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Q9 |
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VCC VCC |
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Q6 |
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Q5 |
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Q17 |
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Q20 |
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Q8 |
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Q3 |
Q4 |
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R2 |
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|
Q21 |
Q7 |
Q18 |
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1kΩ |
|||
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LM146 - LM246 - LM346
VCC
R1
30Ω
|
Output |
VCC |
VCC |
R set |
R set |
|
To other op amps |
I set |
I set |
SET |
SET |
Q19 |
|
VCC |
VCC |
|
or |
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter |
LM146 |
LM246 |
LM346 |
Unit |
VCC |
Supply Voltage |
±22 |
±22 |
±22 |
V |
Vi |
Input Voltage - (note 1) |
±15 |
±15 |
±15 |
V |
Vid |
Differential Input Voltage |
±30 |
±30 |
±30 |
V |
|
Output Short-circuit Duration - (note 2) |
|
Infinite |
|
|
Ptot |
Power Dissipation |
|
|
|
mW |
|
N/D Suffix |
|
500 |
|
|
Toper |
Operating Free-air Temperature Range |
±55 to +125 |
±40 to +105 |
0 to +70 |
oC |
Tstg |
Storage Temperature Range |
±65 to +150 |
±65 to +150 |
±65 to +150 |
oC |
Notes : 1. For suppl y voltages l ess than ±15V, the absolute maximum input vol tage is equal to the supply vol tage.
2.Any of t he amplifi er out puts can be shorted to ground indef initl y ; however more than one should not be simultaneously shorted as the maximum junction temperature wil l be exceeded.
2/9
LM146 - LM246 - LM346
ELECTRICAL CHARACTERISTICS
VCC = ±15V, Iset = 10μA, Tamb = +25oC (unless otherwise specified)
Symbol |
|
Parameter |
|
LM146 |
|
LM246 - LM346 |
||
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|
Unit |
||
|
|
|
Min. Typ. Max. Min. Typ. Max. |
|||||
Vio |
Input Offset Voltage (RS ≤ 10kΩ) |
|
|
|
|
|
mV |
|
|
Tamb = 25oC |
|
|
0.5 |
3 |
|
0.5 |
5 |
|
Tmin. ≤ Tamb ≤ |
Tmax. |
|
|
5 |
|
|
6 |
Iio |
Input Offset Current |
|
|
|
|
|
nA |
|
|
Tamb = 25oC |
|
|
2 |
20 |
|
2 |
100 |
|
Tmin. ≤ Tamb ≤ |
Tmax. |
|
|
25 |
|
|
100 |
Iib |
Input Bias Current |
|
|
|
|
|
nA |
|
|
Tamb = 25oC |
|
|
30 |
100 |
|
30 |
250 |
|
Tmin. ≤ Tamb ≤ Tmax. |
|
|
100 |
|
|
250 |
|
Avd |
Large Signal Voltage Gain |
|
|
|
|
|
V/mV |
|
|
(Vo = ±10V, RL = 10kΩ) |
|
|
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Tamb = 25oC |
|
100 |
1000 |
|
50 |
1000 |
|
|
Tmin. ≤ Tamb ≤ |
Tmax. |
50 |
|
|
25 |
|
|
SVR |
Supply Voltage Rejection Ratio (RS ≤ 10kΩ) |
|
|
|
|
|
dB |
|
|
Tamb = 25oC |
|
80 |
110 |
|
80 |
110 |
|
|
Tmin. ≤ Tamb ≤ |
Tmax. |
80 |
|
|
80 |
|
|
ICC |
Supply Current, all Amp, no Load |
|
|
|
|
|
mA |
|
|
Tamb = 25oC |
|
|
1 |
2 |
|
1 |
2 |
|
Tmin. ≤ Tamb ≤ |
Tmax. |
|
|
2 |
|
|
2 |
Vicm |
Input Common Mode Voltage Range |
|
|
|
|
|
V |
|
|
Tamb = 25oC |
|
±13.5 |
|
|
±13.5 |
|
|
|
Tmin. ≤ Tamb ≤ |
Tmax. |
±13.5 |
|
|
±13.5 |
|
|
CMR |
Common Mode Rejection Ratio (RS ≤ 10kΩ) |
|
|
|
|
|
dB |
|
|
Tamb = 25oC |
|
80 |
110 |
|
80 |
110 |
|
|
Tmin. ≤ Tamb ≤ |
Tmax. |
70 |
|
|
70 |
|
|
IOS |
Output Short-circuit Current |
|
|
|
|
|
mA |
|
|
Tamb = 25oC |
|
10 |
20 |
30 |
10 |
20 |
30 |
|
Tmin. ≤ Tamb ≤ |
Tmax. |
4 |
|
35 |
4 |
|
35 |
± Vopp |
Output Voltage Swing (RL = 10kΩ) |
|
|
|
|
|
V |
|
|
Tamb = 25oC |
|
12 |
14 |
|
12 |
14 |
|
|
Tmin. ≤ Tamb ≤ |
Tmax. |
12 |
|
|
12 |
|
|
SR |
Slew Rate (VI = ±10V, RL = 10kΩ, CL = 100pF, |
|
|
|
|
|
V/μs |
|
|
unity Gain) |
|
0.3 |
0.5 |
|
0.3 |
0.5 |
|
RI |
Input Resistance |
|
|
1 |
|
|
1 |
MΩ |
CI |
Input Capacitance |
|
|
2 |
|
|
2 |
pF |
Vo1/Vo2 |
Channel Separation (RL = 10kΩ, Vo = 12Vpp) |
|
120 |
|
|
120 |
dB |
|
GBP |
Gain Bandwidth Product |
|
|
|
|
|
MHz |
|
|
(VI = 10 mV, RL = 10kΩ, CL = 100pF |
0.8 |
1 |
|
0.5 |
1 |
|
|
|
f = 100kHz) |
|
|
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||||
THD |
Total Harmonic Distortion |
|
|
|
|
|
% |
|
|
(f = 1kHz, Av = 20dB, RL = 10kΩ |
|
|
|
|
|
|
|
|
CL = 100pF, vo = 2Vpp) |
|
0.015 |
|
|
0.015 |
|
|
en |
Equivalent Input Noise Voltage |
|
28 |
|
|
28 |
nV |
|
(f = 1kHz, R = 100Ω) |
|
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```√ |
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|
s |
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Hz |
3/9
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