当前位置：文档库 › MAX4331ESA+T中文资料

MAX4331ESA+T中文资料

General Description

The MAX4330–MAX4334 single/dual/quad op amps combine a wide 3MHz bandwidth, low-power operation,and excellent DC accuracy with Rail-to-Rail ?inputs and outputs. These devices require only 245μA per amplifier,and operate from either a single +2.3V to +6.5V supply or dual ±1.15V to ±3.25V supplies. The input common-mode voltage range extends 250mV beyond V EE and V CC , and the outputs swing rail-to-rail. The MAX4331/MAX4333 feature a shutdown mode in which the output goes high impedance and the supply current decreases to 9μA per amplifier.

Low-power operation combined with rail-to-rail input common-mode range and output swing makes these amplifiers ideal for portable/battery-powered equipment and other low-voltage, single-supply applications.Although the minimum operating voltage is specified at 2.3V, these devices typically operate down to 2.0V. Low offset voltage and high speed make these amplifiers excellent choices for signal-conditioning stages in pre-cision, low-voltage data-acquisition systems. The MAX4330 is available in the space-saving 5-pin SOT23package, and the MAX4331/MAX4333 are offered in a μMAX package.

Applications

Portable/Battery-Powered Equipment Data-Acquisition Systems Signal Conditioning

Low-Power, Low-Voltage Applications

____________________________Features

o 3MHz Gain-Bandwidth Product o 245μA Quiescent Current per Amplifier o Available in Space-Saving SOT23-5 Package (MAX4330)o +2.3V to +6.5V Single-Supply Operation

o Rail-to-Rail Input Common-Mode Voltage Range o Rail-to-Rail Output Voltage Swing o 250μV Offset Voltage

o Low-Power, 9μA (per amp) Shutdown Mode (MAX4331/MAX4333)o No Phase Reversal for Overdriven Inputs o Capable of Driving 2k ?Loads o Unity-Gain Stable

MAX4330–MAX4334

Single/Dual/Quad, Low-Power, Single-Supply,

Rail-to-Rail I/O Op Amps with Shutdown

________________________________________________________________Maxim Integrated Products

Pin Configurations

19-1192; Rev 3; 2/98

Selector Guide

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.For free samples & the latest literature: https://www.wendangku.net/doc/9f6545454.html,, or phone 1-800-998-8800.For small orders, phone 408-737-7600 ext. 3468.

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(V = +2.3V to +6.5V, V = 0V, V = 0V, V = (V / 2), R tied to (V / 2), V SHDN = +25°C, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage, V CC to V EE .....................................................7V IN_+, IN_-, SHDN Voltage................(V EE - 0.3V) to (V CC + 0.3V)Output Short-Circuit Duration....................................Continuous

(short to either supply)

Continuous Power Dissipation (T A = +70°C)

5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW 8-Pin SO (derate 5.88mW/°C above +70°C).................471mW 8-Pin μMAX (derate 4.10mW/°C above +70°C)............330mW

10-Pin μMAX (derate 5.60mW/°C above +70°C)..........444mW 14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW Operating Temperature Ranges

MAX433_C/D .......................................................0°C to +70°C MAX433_E_ _....................................................-40°C to +85°C Maximum Junction Temperature.....................................+150°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°C

MAX4330–MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown

_______________________________________________________________________________________3

DC ELECTRICAL CHARACTERISTICS (continued)

(V CC= +2.3V to +6.5V, V EE= 0V, V CM= 0V, V OUT= (V CC/ 2), R L tied to (V CC/ 2), V SHDN≥2V, T A= +25°C, unless otherwise noted.)

DC ELECTRICAL CHARACTERISTICS

(V CC= +2.3V to +6.5V, V EE= 0V, V CM= 0V, V OUT= (V CC/ 2), R L tied to (V CC/ 2), V SHDN≥2V, T A= -40°C to +85°C,unless

otherwise noted.)

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown 4_______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS (continued)

(V CC = +2.3V to +6.5V, V EE = 0V, V CM = 0V, V OUT = (V CC / 2), R L tied to (V CC / 2), V SHDN ≥2V, T A = -40°C to +85°C,unless otherwise noted.)

Note 1:SHDN logic thresholds are referenced to V EE .

Note 2:The MAX4330EUK is 100% tested at T A = +25°C. All temperature limits are guaranteed by design.

MAX4330–MAX4334

Single/Dual/Quad, Low-Power, Single-Supply,

Rail-to-Rail I/O Op Amps with Shutdown

_______________________________________________________________________________________5

AC ELECTRICAL CHARACTERISTICS

(V CC = +5V, V EE = 0V, V CM = 0V, V OUT = (V CC / 2), R L = 10k ?to (V CC / 2), V SHDN ≥2V, C L = 15pF, T A = +25°C,unless otherwise noted.)

60-20100

100k

10M

GAIN AND PHASE vs. FREQUENCY (NO LOAD)

FREQUENCY (Hz)G A I N (d B )P H A S E (D E G R E E S )

10k

100M 50403020100-10180

-180********-45-90-135

-40100

1k 100k 10M

GAIN AND PHASE

FREQUENCY (Hz)G A I N (d B )

P H A S E (D E G R E E S )

10k 1M 100M 40

-20180

-180108

-36-108144720

-72

-144

-100

10010k 1M 10M POWER-SUPPLY REJECTION RATIO

FREQUENCY (Hz)

P S R R (d B )

1k 100k 100M

-20

-40

-60

-80

__________________________________________Typical Operating Characteristics

(V CC = +5V, V EE = 0V, V CM = V CC / 2, V SHDN > 2V, T A = +25°C, unless otherwise noted.)

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown 6_______________________________________________________________________________________

-40

-20-30100-1040302050

-40

-20

100

INPUT BIAS CURRENT vs. TEMPERATURE

TEMPERATURE (°C)

I N P U T B I A S C U R R E N T (n A )

250

200150

100

TEMPERATURE (°C)

-20

-40-60

2006080

40100

OUTPUT SWING HIGH V C C - V O U T (m V )

120

100804020600

TEMPERATURE (°C)

-200-60-4020406080100

OUTPUT SWING LOW vs. TEMPERATURE

V O U T - V E E (m V )

0.01

100

100k 10M

OUTPUT IMPEDANCE vs. FREQUENCY

FREQUENCY (Hz)

O U T P U T I M P E D A N C E (?)

10k 1M 100M

100

101

0.11200

10008004000200600-200

TEMPERATURE (°C)

-40-200-6020406080100

OUTPUT LEAKAGE CURRENT

O U T P U T L E A K A G E C U R R E N T (p A

)

350

310330250270290210

190170

230150

TEMPERATURE (°C)

-20

-60

100

-4040

80SUPPLY CURRENT vs. TEMPERATURE

I C C (μA )

2015

TEMPERATURE (°C)

-40-60-20

100

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

I C C (μA

)

1500

50001000-500

-1000-1500

TEMPERATURE (°C)

-40-20

0-6020406080100

INPUT OFFSET VOLTAGE vs. TEMPERATURE

I N P U T O F F S E T V

O L T A G E (μV )

-30

-10-20100302040

02314567

INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE

COMMON-MODE VOLTAGE (V)

I N P U T B I A S C U R R E N T (n A )

____________________________Typical Operating Characteristics (continued)

(V CC = +5V, V EE = 0V, V CM = V CC / 2, V SHDN > 2V, T A = +25°C, unless otherwise noted.)

MAX4330–MAX4334

Single/Dual/Quad, Low-Power, Single-Supply,

Rail-to-Rail I/O Op Amps with Shutdown

_______________________________________________________________________________________7

____________________________Typical Operating Characteristics (continued)

(V CC = +5V, V EE = 0V, V CM = V CC / 2, V SHDN > 2V, T A = +25°C, unless otherwise noted.)

118

1081131039383889878

OUTPUT VOLTAGE: EITHER SUPPLY (V)0.100.20.30.50.40.6LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (V = 2.3V, R TO V )

G A I N (d B )

-60-70-80

-90-110-130-120-100-140

TEMPERATURE (°C)

-20

-40-6002080

6040100

COMMON-MODE REJECTION

C O M M O N -M O

E R E J E C T I O N (d B )

115

105110

100

959085

TEMPERATURE (°C)

-40-60-20

06080

4020100

LARGE-SIGNAL GAIN

vs. TEMPERATURE (R = 2k ?)

G A I N (d B )

118

11411010698

909410286

OUTPUT VOLTAGE: EITHER SUPPLY (V)

0.100.20.50.40.30.6

LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (V CC = 2.3V, R L TO V EE )

G A I N (d B

)

130

120125115105

9510011090

OUTPUT VOLTAGE: EITHER SUPPLY (V)

0.100.20.30.50.40.6

LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (V CC = 6.5V, R L TO V EE )

G A I N (d B

)

140

1301201009011080

OUTPUT VOLTAGE: EITHER SUPPLY (V)0

0.1

0.2

0.30.40.50.6LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (V CC = 6.5V, R L TO V CC )

G A I N (d B )

130

125120

115

110

TEMPERATURE (°C)

-40-60-20

100

LARGE-SIGNAL GAIN

vs. TEMPERATURE (R = 100k ?)

G A I N (d B )

2.00

1.951.901.851.801.75

1.701.65

1.60

M A X 4330/34-T O C 18

TEMPERATURE (°C)

-40-60-20

100

MINIMUM OPERATING VOLTAGE

vs. TEMPERATURE

V C C (V )

0.001

10k

100k

TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY

0.01

0.1

FREQUENCY (Hz)

T H D + N O I S E (%)

100

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown 8

_______________________________________________________________________________________

0.001

4.0

5.0

TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK

SIGNAL AMPLITUDE

0.01

0.1

PEAK-TO-PEAK SIGNAL AMPLITUDE (V)

T H D + N O I S E (%)

4.6

4.8

4.2

4.4

100901201101301401

1001000

10000

CROSSTALK vs. FREQUENCY

M A X 4330/34-T O C 22

FREQUENCY (kHz)

C R O S S T A L K (d B )

200

6001000

CAPACITIVE LOAD STABILITY

8LOAD CAPACITANCE (pF)

L O A D R E S I S T A N C E (k ?)

400800

LARGE-SIGNAL TRANSIENT RESPONSE

(NONINVERTING)

MAX4330/34-TOC24

TIME (5μs/div)IN

OUT

V O L T A G E (2V /d i v )

A V = -1

OUT

SMALL-SIGNAL TRANSIENT RESPONSE

(INVERTING)

MAX4330/34-TOC23

TIME (200ns/div)

V O L T A G E (50m V /d i v )

LARGE-SIGNAL TRANSIENT RESPONSE

(INVERTING)

MAX4330/34-TOC25

TIME (5μs/div)

OUT

V O L T A G E (2V /d i v )

A V = +1

OUT SMALL-SIGNAL TRANSIENT RESPONSE

(NONINVERTING)

MAX4330/34-TOC22

TIME (200ns/div)

V O L T A G E (50m V /d i v )

____________________________Typical Operating Characteristics (continued)

(V CC = +5V, V EE = 0V, V CM = V CC / 2, V SHDN > 2V, T A = +25°C, unless otherwise noted.)

MAX4330–MAX4334

Single/Dual/Quad, Low-Power, Single-Supply,

Rail-to-Rail I/O Op Amps with Shutdown

_______________________________________________________________________________________9

Pin Description

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown 10______________________________________________________________________________________

_______________Detailed Description

Rail-to-Rail Input Stage

The MAX4330–MAX4334 have rail-to-rail input and out-put stages that are specifically designed for low-voltage, single-supply operation. The input stage con-sists of separate NPN and PNP differential stages,which operate together to provide a common-mode range extending to 0.25V beyond both supply rails. The crossover region, which occurs halfway between V CC and V EE , is extended to minimize degradation in CMRR caused by mismatched input pairs. The input offset volt-age is typically 250μV. Low offset voltage, high band-width, rail-to-rail common-mode input range, and rail-to-rail outputs make this family of op amps an excel-lent choice for precision, low-voltage data-acquisition systems.

Since the input stage consists of NPN and PNP pairs,the input bias current changes polarity as the input volt-age passes through the crossover region. Match the effective impedance seen by each input to reduce the offset error due to input bias currents flowing through external source impedances (Figures 1a and 1b). The combination of high source impedance with input capacitance (amplifier input capacitance plus stray capacitance) creates a parasitic pole that produces an underdamped signal response. Reducing input capaci-tance or placing a small capacitor across the feedback resistor improves response.

The MAX4330–MAX4334’s inputs are protected from large differential input voltages by internal 1k ?series resistors and back-to-back triple diode stacks across the inputs (Figure 2). For differential input voltages (much less than 1.8V), input resistance is typically 2.3M ?. For differential input voltages greater than 1.8V,input resistance is around 2k ?, and the input bias cur-rent can be approximated by the following equation:

I BIAS = (V DIFF - 1.8V) / 2k ?

In the region where the differential input voltage approaches 1.8V, input resistance decreases exponen-tially from 2.3M ?to 2k ?as the diode block begins con-ducting. Inversely, the bias current increases with the same curve.

Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting)

Figure 1b. Reducing Offset Error Due to Bias Current (Inverting)

MAX4330–MAX4334

Single/Dual/Quad, Low-Power, Single-Supply,

Rail-to-Rail I/O Op Amps with Shutdown

______________________________________________________________________________________

Rail-to-Rail Output Stage

The MAX4330–MAX4334 output stage can drive up to a 2k ?load and still typically swing within 125mV of the rails. Figure 3 shows the output voltage swing of a MAX4331 configured as a unity-gain buffer. The operat-ing voltage is a single +3V supply, and the input volt-age is 3Vp-p. The output swings to within 70mV of V EE and 100mV of V CC , even with the maximum load applied (2k ?to mid-supply).

Driving a capacitive load can cause instability in many op amps, especially those with low quiescent current.The MAX4330–MAX4334 are stable for capacitive loads up to 150pF. The Capacitive Load Stability graph in the Typical Operating Characteristics gives the stable operating region for capacitive vs. resistive loads.Figures 4 and 5 show the response of the MAX4331with an excessive capacitive load, compared with the response when a series resistor is added between the output and the capacitive load. The resistor improves the circuit’s response by isolating the load capacitance from the op amp’s output (Figure 6).

Figure 2. Input Protection Circuit

Figure 3. Rail-to-Rail Input/Output Voltage Range

1V/div

OUT

20μs/div

V CC = 3V, R L = 2k ? TO V CC / 2

Figure 4. Small-Signal Transient Response with Excessive Capacitive Load

50mV/div

OUT

2μs/div

R ISO = 0?, A V = +1 C L = 510pF V CC = 3V, R L = 100k ?

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown 12______________________________________________________________________________________

__________Applications Information

Power-Up

The MAX4330–MAX4334 outputs typically settle within 5μs after power-up. Using the test circuit of Figure 7,Figures 8 and 9 show the output voltage and supply current on power-up and power-down.

Shutdown Mode

The MAX4331/MAX4333 feature a low-power shutdown mode. When the shutdown pin (SHDN ) is pulled low, the supply current drops to 9μA per amplifier (typical), the amplifier is disabled, and the outputs enter a high-impedance state. Pulling SHDN high or leaving it float-ing enables the amplifier. Figures 10 and 11 show the MAX4331/MAX4333’s output voltage and supply-current responses to a shutdown pulse.

Figure 5. Small-Signal Transient Response with Excessive Load and Isolation Resistor

50mV/div

OUT 2μs/div

A V = +1, C L = 510pF R ISO = 39?Figure 7. Power-Up/Shutdown Test Circuit SHDN

0V TO +2.7V STEP FOR SHUTDOWN TEST

0V TO +2.7V STEP FOR POWER-UP TEST, +2.7V STEP FOR SHUTDOWN-ENABLE TEST

SUPPLY-CURRENT V CC

100?

2k 2k

Figure 8. Power-Up/Down Output Voltage

1V/div

500mV/div

5μs/div

MAX4330–MAX4334

Single/Dual/Quad, Low-Power, Single-Supply,

Rail-to-Rail I/O Op Amps with Shutdown

______________________________________________________________________________________13

Do not three-state SHDN . Due to the output leakage currents of three-state devices and the small internal pull-up current for SHDN , three-stating this pin could result in indeterminate logic levels, and could adversely affect op-amp operation.

The logic threshold for SHDN is always referred to V EE ,not GND. When using dual supplies, pull SHDN to V EE to place the op amp in shutdown mode.

Power Supplies and Layout

The MAX4330–MAX4334 operate from a single +2.3V to +6.5V power supply, or from dual ±1.15V to ±3.25V supplies. For single-supply operation, bypass the power supply with a 0.1μF capacitor to ground (V EE ).For dual supplies, bypass both V CC and V EE with their own set of capacitors to ground.

Good layout technique helps optimize performance by decreasing the amount of stray capacitance at the op amp’s inputs and outputs. To decrease stray capaci-tance, minimize trace lengths by placing external com-ponents close to the op amp’s pins.

Figure 9. Power-Up/Down Supply Current CC

1V/div

100CC

5μs/div

Figure 11. Shutdown Enable/Disable Supply Current

SHDN 1V/div

100CC

5μs/div

Figure 10. Shutdown Output Voltage Enable/Disable

SHDN 1V/div

500mV/div

5μs/div

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown 14______________________________________________________________________________________

Pin Configurations (continued)

MAX4330–MAX4334

Single/Dual/Quad, Low-Power, Single-Supply,

Rail-to-Rail I/O Op Amps with Shutdown

______________________________________________________________________________________15

Tape-and-Reel Information

Chip Information

MAX4330/MAX4331

TRANSISTOR COUNT: 199

SUBSTRATE CONNECTED TO V EE MAX4332/MAX4333

TRANSISTOR COUNT: 398

SUBSTRATE CONNECTED TO V EE MAX4334

TRANSISTOR COUNT: 796

SUBSTRATE CONNECTED TO V EE

M A X 4330–M A X 4334

Single/Dual/Quad, Low-Power, Single-Supply,Rail-to-Rail I/O Op Amps with Shutdown

________________________________________________________Package Information

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600?1998 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products.