PA141 Datasheet, PDF (1/5 Pages) Cirrus Logic – HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS

MICROTECHNOLOGY
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
PA141/PA142 • PA141A/PA142A
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX [phone]
FEATURES
• MONOLITHIC MOS TECHNOLOGY
• LOW COST
• HIGH VOLTAGE OPERATION—350V
• LOW QUIESCENT CURRENT—2mA
• NO SECOND BREAKDOWN
• HIGH OUTPUT CURRENT—120 mA PEAK
• AVAILABLE IN DIE FORM—CPA141
APPLICATIONS
8-PIN TO-3
PACKAGE STYLE CE
10-PIN SIP
PACKAGE STYLE DW
• PIEZO ELECTRIC POSITIONING
• ELECTROSTATIC TRANSDUCER & DEFLECTION
• DEFORMABLE MIRROR FOCUSING
• BIOCHEMISTRY STIMULATORS
• COMPUTER TO VACUUM TUBE INTERFACE
TYPICAL APPLICATION
Ref: APPLICATION NOTE 20: "Bridge Mode Operation of Power Amplifiers"
R
20R
20R
V IN
+175
2.2K
20R
+175
2.2K
DESCRIPTION
10pF
10pF
The PA141/PA142 are high voltage monolithic MOSFET
operational amplifiers achieving performance features
previously found only in hybrid designs while increasing
reliability. Inputs are protected from excessive common mode
A1
A2
PA141/142 _RCL
R_CL ^PA141/142
Rn
PIEZO
180 _TRANSDUCER 180
100 Ω
100 Ω
Cn
and differential mode voltages. The safe operating
330pF
330pF
area (SOA) has no second breakdown limitations and
can be observed with all type loads by choosing
an appropriate current limiting resistor. External com-
LOW COST 660V p-p
–175
PIEZO DRIVE
–175
pensation provides the user flexibility in choosing
Two PA141/PA142 amplifiers operated as a bridge driver
optimum gain and bandwidth for the application.
for a piezo transducer provides a low cost 660 volt total drive
The PA141 is packaged in a hermetically sealed TO-3
and all circuitry is isolated from the case by an aluminum
nitride (AlN) substrate.
capability. The R_N C_N network serves to raise the apparent
gain of A2 at high frequencies. If R_N is set equal to R the
amplifiers can be compensated identically and will have
The PA142 is packaged in APEX’s hermetic ceramic matching bandwidths.
SIP package.
EQUIVALENT SCHEMATIC
EXTERNAL CONNECTIONS
R _CL
PHASE
8 (6)
R_C
C_C
COMPENSATION
D1
+V_S
COMP ³
2 ^COMP
1 ^I LIM
Gain
1
10
C_C
18pF
10pF
R_C
2.2K
2.2K
Q1
Q2
OUT 4
30
3.3pF 2.2K
Q3
I _LIM
TOP VIEW
C_S
330pF
(1) 5
–IN
(2) 6
+IN
Q4
Q5
D2 D3 D4 D5
(8) 2 _Q6
COMP
COMP Q8
(9) 3
Q11
Q12
Q13
Q7
Q9
Q10
Q14
5 PA141 PIN NUMBER
(1) PA142 PIN NUMBER
1 (7)
4 (10)
OUT
5
–IN
8
6
7 ^+VS
+IN –VS
PA141
R_S
100 Ω
C^S ,C^C ARE NPO RATED
FOR FULL SUPPLY VOLTAGE.
R_{CL =}
3
I _LIM
TOP VIEW
1 2 3 4 5 6 7 8 9 10
NC NC –V_S +V_S I_LIM
C_C C_C OUT
R_S
R_C
100Ω
–IN +IN
C_S
330pf
C_C
–V_S
PA142
R_CL
7
(5) ^{NOTE: PA141 Recommended mounting torque is 4-7 in•lbs}
(.45 -.79 N•m)
CAUTION: The use of compressible, thermally conductive
insulators may void warranty.
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