TC7652CPA Microchip Technology, TC7652CPA Datasheet - Page 8

• Manufacturer Part Number: TC7652CPA
• Description: IC OPAMP CHOPPER STAB LN 8DIP
• Manufacturer: Microchip Technology

Specifications of TC7652CPA

• Slew Rate: 1 V/µs
• Amplifier Type: Chopper (Zero-Drift)
• Number Of Circuits: 1
• Gain Bandwidth Product: 400kHz
• Current - Input Bias: 30pA
• Voltage - Input Offset: 2000µV
• Current - Supply: 1mA
• Voltage - Supply, Single/dual (±): 5 V ~ 16 V, ±2.5 V ~ 8 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Op Amp Type: Low Noise
• No. Of Amplifiers: 1
• Bandwidth: 400kHz
• Supply Voltage Range: 5V To 16V
• Amplifier Case Style: DIP
• No. Of Pins: 8
• Operating Temperature Range: 0°C To +70°C
• Number Of Channels: 1
• Voltage Gain Db: 150 dB
• Common Mode Rejection Ratio (min): 120 dB
• Input Offset Voltage: 0.005 mV
• Supply Current: 3 mA
• Maximum Power Dissipation: 730 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Maximum Dual Supply Voltage: +/- 8 V
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Current - Output / Channel: -
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details
• Other names: 158-1136; 158-1136

TC7652
4.6
Where possible, the 8-pin device pinout conforms to
such industry standards as the LM101 and LM741. Null
storing external capacitors connect to Pins 1 and 8,
which are usually for offset null or compensation capac-
itors. Output clamp (Pin 5) is similarly used. For OP05
and OP07 devices, replacement of the offset null
potentiometer (connected between Pins 1 and 8 and
V
compatibility. Replacing the compensation capacitor
between Pins 1 and 8 by two capacitors to V
required. The same operation (with the removal of any
connection to Pin 5) works for LM101, µA748 and sim-
ilar parts.
Because NC pins provide guarding between input and
other pins, the 14-pin device pinout conforms closely to
the LM108. Because this device does not use any extra
pins and does not provide offset nulling (but requires a
compensation capacitor), some layout changes are
necessary to convert to the TC7652.
4.7
Figures 4-2 and 4-3 show basic inverting and nonin-
verting amplifier circuits using the output clamping cir-
cuit to enhance overload recovery performance. The
only limitations on replacing other op amps with the
TC7652 are supply voltage (±8V maximum) and output
drive capability (10kΩ load for full swing). Overcome
these limitations with a booster circuit (Figure 4-4) to
combine output capabilities of the LM741 (or other
standard device) with input capabilities of the TC7652.
These two form a composite device, therefore, when
adding the feedback network, the monitor loop gains
stability.
FIGURE 4-2:
DS21464B-page 8
DD
by two capacitors from those pins to V
Input
Pin Compatibility
Some Applications
0.1µF
+
–
Clamp
NONINVERTING
AMPLIFIER WITH
OPTIONAL CLAMP
R
3
0.1µF
R
R
2
1
TC7652
Output
SS
) provides
SS
is
FIGURE 4-3:
FIGURE 4-4:
Figure 4-5 shows the clamp circuit of a zero offset com-
parator. Because the clamp circuit requires the invert-
ing input to follow the input signal, problems with a
chopper stabilized op amp are avoided. The threshold
input must tolerate the output clamp current ≈V
without disrupting other parts of the system.
Figure 4-6 shows how the TC7652 can offset null high
slew rate and wideband amplifiers.
Mixing the TC7652 with circuits operating at ±15V
requires a lower supply voltage divider with the TC7660
voltage converter circuit operated "backwards." Figure
4-7 shows an approximate connection.
FIGURE 4-5:
Input
In
V
IN
-7.5V
0.1
µF
0.1µF
R
+
–
1
-7.5V
0.1µF
200kΩ to 2mΩ
+
–
TC7652
Clamp
WITH OPTIONAL CLAMP
USING 741 TO BOOST
OUTPUT DRIVE
CAPABILITY
LOW OFFSET
COMPARATOR
INVERTING AMPLIFIER
0.1
µF
©
–
+
2002 Microchip Technology Inc.
Clamp
0.1µF
+
–
R
10kΩ
+15V
2
-15V
0.1µF
741
TC7652
V
TC7652
V
OUT
TH
Output
Out
IN
/R