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PDF MAX9636 Data sheet ( Hoja de datos )
| Número de pieza | MAX9636 | |
| Descripción | Rail-to-Rail I/O Op Amps | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX9636 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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EVALUATION KIT AVAILABLE
MAX9636/MAX9637/MAX9638
3V/5V Low-Power, Low-Noise, CMOS,
Rail-to-Rail I/O Op Amps
General Description
The MAX9636/MAX9637/MAX9638 are single-supply,
CMOS input op amps featuring wide bandwidth at low
quiescent current, making them suitable for a broad
range of battery-powered applications such as portable
medical instruments, portable media players, and smoke
detectors. A combination of extremely low input bias
currents, low input current noise and low input voltage
noise allows interface to high-impedance sources such
as photodiode and piezoelectric sensors.
The ICs feature a maximized ratio of gain bandwidth
(GBW) to supply current. The devices operate from a
single 2.1V to 5.5V supply at a typical quiescent supply
current of 36µA. For additional power conservation, the
MAX9636 and MAX9638 offer a low-power shutdown
mode that reduces supply current to 1µA and places the
amplifiers’ outputs into a high-impedance state.
The ICs are specified over the automotive operating tem-
perature range (-40°C to +125°C). The single is offered
in a space-saving, 6-pin SC70 package, while the dual is
offered in tiny, 8-pin SC70 and 10-pin UTQFN packages.
Applications
Portable Medical Instruments
Piezoelectric Transducer Amplifiers
Smoke Detectors
Battery-Powered Devices
Transimpedance Amplifiers
Tablets
Benefits and Features
S Ideal for Precision Transimpedance Amplifier
Applications
Ultra-Low 0.1pA Bias Current
Wide 1.5MHz Bandwidth
Low Input Current-Noise Density: 0.9fA/√Hz
S Extend Battery Life
Single-Supply Operation VDD = 2.1V to 5.5V
Low 36µA Quiescent Current
1µA Quiescent Current in Shutdown
S Save Board Space
6- and 8-Pin SC70 and 10-Pin UTQFN Packages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX9636AXT+
-40NC to +125NC 6 SC70
MAX9637AXA+
-40NC to +125NC 8 SC70
MAX9638AVB+
-40NC to +125NC 10 UTQFN
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Block Diagram
PHOTODIODE
VDD
IN-
MAX9636
IN+
OUT
SIGNAL
CONDITIONING/
FILTERS
MAX1286
ADC
REF
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5228; Rev 3; 1/15
1 page  
MAX9636/MAX9637/MAX9638
3V/5V Low-Power, Low-Noise, CMOS,
Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VCM = VDD/2, RL = 10kI to VDD/2, SHDN = VDD, TA = -40NC to +125NC. Typical values are at
TA = +25NC, unless otherwise noted.)
OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT
VDD = 3.3V, VOH = VDD - VOUT
2000
1800
1600
1400
1200 TA = +125°C
1000
800 TA = +85°C
600
400
200
0
0
TA = +25°C
TA = 0°C
TA = -40°C
5 10 15 20 25 30 35
SOURCE CURRENT (mA)
OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT
VDD = 5V, VOH = VDD - VOUT
1200
1000 TA = +125°C
800 TA = +85°C
600 TA = +25°C
400
200
0
0
TA = 0°C
TA = -40°C
5 10 15 20 25 30 35 40 45 50
SOURCE CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
45
43 TA = +85°C
41
TA = +125°C
39
37
35
33
31
TA = +25°C
TA = 0°C
29
27 TA = -40°C
PER AMPLIFIER
25
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
OPEN-LOOP GAIN AND PHASE
vs. FREQUENCY
140 180MAX9636 toc13
120
100
GAIN
80
60
135
90
45
40 0
20
0 PHASE
-20
-40
-45
-90
-135
-60
0.001 0.01
-180
0.1 1 10 100 1000 10,000
FREQUENCY (kHz)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0.01 0.1
1 10 100 1000 10,000
FREQUENCY (kHz)
DC COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
100
98
96
94
92
90
88
86
84
82
80
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
100
90
80
70
60
50
40
30
20
10
0
0.01 0.1
1 10 100 1000 10,000
FREQUENCY (kHz)
DC POWER-SUPPLY REJECTION RATIO
vs. TEMPERATURE
100
98
96
94
92
90
88
86
84
82
80
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
INPUT VOLTAGE NOISE vs. FREQUENCY
300
250
200
150
100
50
0
0.01
0.1 1 10
FREQUENCY (kHz)
100
Maxim Integrated
5
5 Page 
MAX9636/MAX9637/MAX9638
3V/5V Low-Power, Low-Noise, CMOS,
Rail-to-Rail I/O Op Amps
For best performance, follow standard high-impedance
layout techniques, which include the following:
U Using shielding techniques to guard against parasitic
leakage paths. For example, put a trace connected to
the noninverting input around the inverting input.
U Minimizing the amount of stray capacitance connect-
ed to op amp’s inputs to improve stability. To achieve
this, minimize trace lengths and resistor leads by
placing external components as close as possible to
the package.
U Use separate analog and digital power supplies.
Applications Information
Shutdown Operation
The MAX9636/MAX9638 feature an active-low shutdown
mode that sends the inputs and output into high imped-
ance and substantially lowers the quiescent current.
Active-Low Input
The shutdown active-low (VIL) and high (VIH) threshold
voltages are designed for ease of integration with digital
controls, such as microcontroller outputs. These thresh-
olds are independent of supply, eliminating the need for
external pulldown circuitry.
Output During Shutdown
The MAX9636/MAX9638 output is in a high-impedance
state while SHDN is low. The device structure limits the out-
put leakage current in this state to 0.01µA when the out-
put is between 0V to VDD.
ADC Driver
The MAX9636/MAX9637/MAX9638 are low-power ampli-
fiers ideal for driving high to medium-resolution ADCs.
Figure 3 shows how the MAX9636 is connected to a pho-
todiode, with the amplifier output connected to additional
signal conditioning/filtering, or directly to the ADC. The
MAX1286–MAX1289 family of low-power, 12-bit ADCs are
ideal for connecting to the MAX9636/MAX9637/MAX9638.
The MAX1286–MAX1289 ADCs offer sample rates up
to 150ksps, with 3V and 5V supplies, as well as 1- and
2-channel options. These ADCs dissipate just 15µA when
sampling at 10ksps and 0.2µA in shutdown. Offered in
tiny 8-pin SOT23 and 3mm x 3mm TDFN packages, the
MAX1286–MAX1289 ADCs are an ideal fit to pair with
the MAX9636/MAX9637/MAX9638 amplifiers in portable
applications.
Similarly, the MAX1086–MAX1089 is a family of 10-bit
pin-compatible low-power ADCs with the same 3V/5V,
1- and 2-channel options. Table 1 details the amplifier and
ADC pairings for single- and dual-channel applications.
PROCESS: BiCMOS
Chip Information
Table 1. Recommended Amplifiers/ADCs
CHANNELS
1
2
2
AMPLIFIER
MAX9636
MAX9637
MAX9638
3V, 10 BIT
MAX1089
MAX1087
MAX1087
3V, 12 BIT
MAX1289
MAX1287
MAX1287
ADC
5V, 10 BIT
MAX1088
MAX1086
MAX1086
5V, 12 BIT
MAX1288
MAX1286
MAX1286
Maxim Integrated
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MAX9636.PDF ] | |
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