Rainbow Electronics MAX4249_MAX4257 - Manual (Page 9)

MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
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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