Detailed description, Pin description – Rainbow Electronics MAX4249_MAX4257 User Manual
Page 9
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
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9
Detailed Description
The MAX4249–MAX4257 single-supply operational
amplifiers feature ultra-low noise and distortion while
consuming very little power. Their low distortion and low
noise make them ideal for use as preamplifiers in wide
dynamic-range applications, such as 16-bit analog-to-
digital converters (see Typical Operating Circuit). Their
high-input impedance and low noise are also useful for
signal conditioning of high-impedance sources, such
as piezoelectric transducers.
These devices have true rail-to-rail ouput operation,
drive loads as low as 1k
Ω while maintining DC accura-
cy, and can drive capactive loads up to 400pF without
oscillation. The input common-mode voltage range
extends from V
DD
- 1.1V to 200mV beyond the negative
rail. The push-pull output stage maintains excellent DC
characteristics, while delivering up to ±5mA of current.
The MAX4250–4254 are unity-gain stable, whereas, the
MAX4249/MAX4255/MAX4256/MAX4257 have a higher
slew rate and are stable for gains
≥ 10V/V. The
MAX4249/MAX4251/MAX4253/MAX4256 feature a low-
power shutdown mode, which reduces the supply cur-
rent to 0.5µA and disables the outputs.
Pin Description
PIN/BUMP
M A X4 2 5 0 /
M A X4 2 5 5
M A X4 2 5 1 /
M A X4 2 5 6
M A X4 2 5 2 /
M A X4 2 5 7
M A X4 2 5 2
M A X4 2 4 9 /
M A X4 2 5 3
M A X4 2 5 4
5-Pin
SOT23
8-Pin
SO/µMAX
8-Pin
SO/µMAX
8-Pin
UCSP
10-Pin
UCSP
10-Pin
µMAX
1 4 - Pin
SO
14-Pin
SO
NAME
FUNCTION
1
6
1, 7
A1, A3
A1, C1
1, 9
1, 13
1, 7, 8,
14
OUT, OUTA,
OUTB,
OUTC,
OUTD
Amplifier Output
2
4
4
C2
B4
4
4
11
V
SS
Negative Supply.
Connect to
ground for single-
supply operation
3
3
3, 5
C1, C3
A3, C3
3, 5
3, 11
3, 5, 10,
12
IN + , IN A+ ,
IN B+ , IN C + ,
IN D +
Noninverting
Amplifier Input
4
2
2, 6
B1, B3
A2, C2
2, 6
2, 12
2, 6, 9,
13
IN-, INA-,
INB-,
INC-, IND-
Inverting
Amplifier Input
5
7
8
A2
B1
8
14
4
V
DD
Positive Supply
—
8
—
—
A4, C4
—
5, 9
—
SHDN,
SHDNA,
SHDNB
Shutdown Input,
Connect to V
DD
or leave
unconnected for
normal operation
(amplifier(s)
enabled).
—
1, 5
—
—
—
—
5, 7,
8, 10
—
N.C.
No Connection.
Not internally
connected.
—
—
—
B2
B2, B3
—
—
—
—
Not populated
with solder
sphere