Datasheet

Detailed Description
Rail-to-Rail Input Stage
The MAX4230–MAX4234 CMOS operational amplifiers
have parallel-connected n- and p-channel differential
input stages that combine to accept a common-mode
range extending to both supply rails. The n-channel
stage is active for common-mode input voltages typically
greater than (V
SS
+ 1.2V), and the p-channel stage is
active for common-mode input voltages typically less than
(V
DD
- 1.2V).
Applications Information
Package Power Dissipation
Warning: Due to the high output current drive, this
op amp can exceed the absolute maximum power-
dissipation rating. As a general rule, as long as the
peak current is less than or equal to 40mA, the maximum
package power dissipation is not exceeded for any of the
package types offered. There are some exceptions to this
rule, however. The absolute maximum power-dissipation
rating of each package should always be verified using
the following equations. The equation below gives an
approximation of the package power dissipation:
IC(DISS) RMS RMS
P V I COS≅θ
where:
V
RMS
= RMS voltage from V
DD
to V
OUT
when sourcing
current and RMS voltage from V
OUT
to V
SS
when sinking
current.
I
RMS
= RMS current flowing out of or into the op amp and
the load.
θ = phase difference between the voltage and the current.
For resistive loads, COS θ = 1.
PIN BUMP
NAME FUNCTION
M AX 4230
SOT23/
SC70
M AX 4231
SOT23/
SC70/T h in
µDFN
M AX 4232
SOT23/
µM A X
M A X4233
µM A X
M AX 4234
TSSOP/SO
M A X4231
UCSP
M AX 4233
UCSP
1 1 — — — B1 — IN+ Noninverting Input
2 2 4 4 11 A1 B4
V
SS
Negative Supply Input.
Connect to ground for single-
supply operation.
3 3 — — — B2 — IN- Inverting Input
4 4 — — — A2 — OUT Amplier Output
5 6 8 10 4 A3 B1
V
DD Positive Supply Input
— 5 — 5, 6 — B3 C4, A4
SHDN,
SHDN1 ,
SHDN2
Shutdown Control. Tie to high
for normal operation.
— — 3 3 3 — C3 IN1+ Noninverting Input to Amplier 1
— — 2 2 2 — C2 IN1- Inverting Input to Amplier 1
— — 1 1 1 — C1 OUT1 Amplier 1 Output
— — 5 7 5 — A3 IN2+ Noninverting Input to Amplier 2
— — 6 8 6 — A2 IN2- Inverting Input to Amplier 2
— — 7 9 7 — A1 OUT2 Amplier 2 Output
— — — — 10, 12 — —
IN3+,
N4+
Noninverting Input to Ampliers 3
— — — — 9, 13 — —
IN3-,
IN4-
Inverting Input to Ampliers 3
and
— — — — 8, 14 — —
OUT3,
OUT4
Ampliers 3 and 4 Outputs
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
www.maximintegrated.com
Maxim Integrated │ 8
Pin Description