Maxim MAX475MJD, MAX475ESD, MAX475EPD, MAX475CSD, MAX475CPD Datasheet

19-0260; Rev 1; 3/95

Single/Dual/Quad, 10MHz

Single-Supply Op Amps

_______________General Description

The single MAX473, dual MAX474, and quad MAX475
are single-supply (2.7V to 5.25V), unity-gain-stable op
amps with rail-to-rail output swing. Each op amp guar­antees a 10MHz unity-gain bandwidth, 15V/µs slew
rate, and 600Ω drive capability while typically consum­ing only 2mA supply current. In addition, the input
range includes the negative supply rail and the output
swings to within 50mV of each supply rail.

Single-supply operation makes these devices ideal for
low-power and low-voltage portable applications. With
their fast slew rate and settling time, they can replace
higher-current op amps in large-signal applications.
The MAX473/MAX474/MAX475 are available in DIP and
SO packages in the industry-standard op-amp pin
configurations. The MAX473 and MAX474 are also
offered in the µMAX package, the smallest 8-pin SO.

________________________Applications

Portable Equipment
Battery-Powered Instruments
Signal Processing
Discrete Filters
Signal Conditioning
Servo-Loops

__________Typical Operating Circuit

____________________________Features

♦ 15V/µs Min Slew Rate
♦ +3V Single-Supply Operation
♦ Guaranteed 10MHz Unity-Gain Bandwidth
♦ 2mA Supply Current per Amplifier
♦ Input Range Includes Negative Rail
♦ Outputs Short-Circuit Protected
♦ Rail-to-Rail Output Swing (to within ±50mV)
♦ µMAX Package (the smallest 8-pin SO)

______________Ordering Information

PART

MAX473CPA

MAX473CSA
MAX473CUA 0°C to +70°C 8 µMAX
MAX473C/D 0°C to +70°C
MAX473EPA -40°C to +85°C 8 Plastic DIP
MAX473ESA -40°C to +85°C 8 SO
MAX473MJA -55°C to +125°C 8 CERDIP

Ordering Information continued on last page.

* Dice are specified at T

TEMP. RANGE PIN-PACKAGE

0°C to +70°C
0°C to +70°C

= +25°C, DC parameters only.

A

8 Plastic DIP
8 SO

Dice*

_________________Pin Configurations

MAX473/MAX474/MAX475

V

IN

100mVp-p

9.9k

9.9k

1V

9.9k

82pF

3V

1/4 MAX475

1V

BANDPASS OUTPUT
1Vp-p at 190kHz

9.9k

127k

1V

82pF

3V

1/4 MAX475

fo = 190kHz
Q = 10

9.9k

9.9k

3V

1/4 MAX475

BANDPASS FILTER

________________________________________________________________

TOP VIEW

1

NULL

IN+
V

OUTA

INA­INA+

IN-

EE

EE

MAX473

2
3
4

DIP/SO/µMAX

1
2

A

3
4

DIP/SO/µMAX

Pin Configurations continued on last page.

Maxim Integrated Products

Call toll free 1-800-998-8800 for free samples or literature.

MAX474

B

8

NULL

7

V

CC

OUT

6

N.C.

5

8

V

CC

OUTB

7

INB-

6

INB+V

5

1

Single/Dual/Quad, 10MHz
Single-Supply Op Amps

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC- VEE)......................................................7V

Input Voltage (IN+, IN-, IN_+, IN_-).........................(V

Output Short-Circuit Duration.....................................Continuous

Continuous Power Dissipation (T

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW

8-Pin SO (derate 5.88mW/°C above +70°C)................471mW

8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW

8-Pin CERDIP (derate 8.00mW/°C above +70°C)........640mW

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)...800mW

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.

= +70°C)

A

to (V

CC

EE

+ 0.3V)

- 0.3V)

ELECTRICAL CHARACTERISTICS

(+3V ≤ VCC≤ +5V, VEE= 0V, VCM= 0.5V, V

Input Offset Voltage ±0.70 ±2.0

Input Bias Current

MAX473/MAX474/MAX475

Input Offset Current
Common-Mode Voltage

Input Noise-Voltage Density

Large-Signal Gain
(Note 1)

Output Voltage

Unity-Gain Bandwidth
(Note 2)

V

V

A

V

GBW

= 0.5V, TA= +25°C, unless otherwise noted.)

OUT

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

MAX473
MAX474

OS

MAX475
Current flows out of terminals

B

OS

High

CM

Low
VEE≤ VCM≤ (VCC- 1.9V)
VCC= 2.7V to 6.0V
f = 10kHz

n

0.3V ≤ V
(VCC- 0.5V)

VOL

Sinking 5mA

Sourcing 5mA

+ - VIN- = +1V, RL= no load

V

IN

OH

VIN+ - VIN- = -1V, RL= no load VEE+ 0.05

OL

VCC= 5V, RL= 10kΩ, CL= 20pF,
VIN+ - VIN- = +1V step

3V ≤ VCC≤ 5V 10 12
VCC= 2.7V 10

OUT

≤

14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW

14-Pin CERDIP (derate 9.09mW/°C above +70°C)......727mW

Operating Temperature Ranges

MAX47_C_ _ ......................................................0°C to +70°C

MAX47_E_ _.....................................................-40°C to +85°C

MAX47_MJ_...................................................-55°C to +125°C

Junction Temperatures

MAX47_C_ _/E_ _........................................................ +150°C

MAX47_MJ_................................................................ +175°C

Storage Temperature Range.............................-65°C to +160°C

Lead Temperature (soldering, 10sec).............................+300°C

±0.70 ±2.0

±0.80 ±2.5

VCC- 1.9 VCC- 1.7

RL= no load
RL= 10kΩ
RL= 600Ω
VCC= 5V
VCC= 3V
VCC= 5V
VCC= 3V

VEE- 0.1 V

40e

110
94 105
82 90

76

100

76
90

VCC- 0.05V

15 17Slew Rate SR

EE

nV/√Hz

V/µs

MHz

mV

nA0 80 150I
nA±10 ±30I

V

dB80 90CMRRCommon-Mode Rejection Ratio
dB80 90PSRRPower-Supply Rejection Ratio

dB

V

2 _______________________________________________________________________________________

Single/Dual/Quad, 10MHz

Single-Supply Op Amps

ELECTRICAL CHARACTERISTICS (continued)

(+3V ≤ VCC≤ +5V, VEE= 0V, VCM= 0.5V, V

Settling Time
Power-Up Time

Overshoot

Phase Margin

Gain Margin
Supply Current

Operating Supply-Voltage
Range

= 0.5V, TA= +25°C, unless otherwise noted.)

OUT

CONDITIONS

To 0.1%, CL= 20pF

S

AV= +1, VIN= 1/2 VCCstep, see

PU

Operating Characteristics

CL= 150pF
CL= 20pF

VCC= 5V
VCC= 3V
VCC= 5V
VCC= 3V

S

RL= 10kΩ,
CL= 20pF

RL= 10kΩ,
CL= 20pF

Per amplifier
Single supply
Dual supplies

Typical

10

5
63
58
10
12

2.7 5.25

±1.35 ±2.625

ELECTRICAL CHARACTERISTICS

(+3V ≤ VCC≤ +5V, VEE= 0V, VCM= 0.5V, V

Input Offset Voltage ±2.0

Input Bias Current
Input Offset Current

Large-Signal Gain
(Note 1)

Output Voltage

Supply Current
Operating Supply-Voltage

Range

V

A

V
V

= 0.5V, TA= 0°C to +70°C, unless otherwise noted.)

OUT

CONDITIONS

MAX473
MAX474

OS

MAX475
Current flows out of terminals

B

OS

VEE≤ VCM≤ (VCC- 1.9V)
VCC= 2.7V to 6.0V

0.4V ≤ V

VOL

(VCC- 0.6V)
VIN+ - VIN- = +1V, RL= no load

OH

VIN+ - VIN- = -1V, RL= no load

OL

VCC= 5V, RL= 10kΩ, CL= 20pF,
VIN+ - VIN- = +1V step

Per amplifier

S

Single supply
Dual supplies

OUT

≤

RL= 10kΩ
RL= 600Ω

94
80

VCC- 0.07

VEE+ 0.07

12

2.7 5.25

±1.35 ±2.625

MAX473/MAX474/MAX475

UNITSMIN TYP MAXSYMBOLPARAMETER

ns400t
ns700t

%

degrees

dB

mA2.0 3.0I

V

UNITSMIN TYP MAXSYMBOLPARAMETER

±2.0

mV

±3.0

nA0 175I
nA±35I
dB78CMRRCommon-Mode Rejection Ratio
dB78PSRRPower-Supply Rejection Ratio

dB

V

V/µsSRSlew Rate

mA3.3I

V

_______________________________________________________________________________________ 3

Single/Dual/Quad, 10MHz
Single-Supply Op Amps

ELECTRICAL CHARACTERISTICS

(+3V ≤ VCC≤ +5V, VEE= 0V, VCM= 0.5V, V

Input Offset Voltage ±2.3

Input Bias Current
Input Offset Current

Large-Signal Gain
(Note 1)

Output Voltage

Supply Current
Operating Supply-Voltage

Range

V

A

V

V

= 0.5V, TA= -40°C to +85°C, unless otherwise noted.)

OUT

CONDITIONS

MAX473
MAX474

OS

MAX475
Current flows out of terminals

B

OS

VEE≤ VCM≤ (VCC- 2.0V)
VCC= 2.7V to 6.0V

0.4V ≤ V

VOL

(VCC- 0.6V)
VIN+ - VIN- = +1V, RL= no load

OH

VIN+ - VIN- = - 1V, RL= no load

OL

VCC= 5V, RL= 10kΩ, CL= 20pF,
VIN+ - VIN- = +1V step

Per amplifier

S

Single supply
Dual supplies

OUT

≤

RL= 10kΩ
RL= 600Ω

94
72

VCC- 0.08

10

2.7 5.25

±1.35 ±2.625

MAX473/MAX474/MAX475

ELECTRICAL CHARACTERISTICS

(+3V ≤ VCC≤ +5V, VEE= 0V, VCM= 0.5V, V

Input Offset Voltage ±2.8

Input Bias Current
Input Offset Current

Large-Signal Gain
(Note 1)

Output Voltage

Supply Current

Operating Supply-Voltage
Range

Note 1: Gain decreases to zero as the output swings beyond the specified limits.
Note 2: Guaranteed by correlation to slew rate.

V

A

V

= 0.5V, TA= -55°C to +125°C, unless otherwise noted.)

OUT

CONDITIONS

MAX473
MAX474

OS

MAX475
Current flows out of terminals

B

OS

VEE≤ VCM≤ (VCC- 2.15V)
VCC= 2.7V to 6.0V

0.5V ≤ V

VOL

(VCC- 0.6V)
VIN+ - VIN- = +1V, RL= no load

OH

VIN+ - VIN- = -1V, RL= no loadV

OL

VCC= 5V, RL= 10kΩ, CL= 20pF,
VIN+ - VIN- = +1V step

Per amplifier

S

Single supply
Dual supplies

OUT

≤

RL= 10kΩ
RL= 600Ω

90
70

VCC- 0.1

9

2.7 5.25

±1.35 ±2.625

±2.3

±3.3

VEE+ 0.08

±2.8

±4.0

VEE+ 0.1

UNITSMIN TYP MAXSYMBOLPARAMETER

mV

nA0 200I

nA±50I
dB72CMRRCommon-Mode Rejection Ratio
dB72PSRRPower-Supply Rejection Ratio

dB

V

V/µsSRSlew Rate

mA3.4I

V

UNITSMIN TYP MAXSYMBOLPARAMETER

mV

nA0 225I

nA±60I
dB70CMRRCommon-Mode Rejection Ratio
dB70PSRRPower-Supply Rejection Ratio

dB

V

V/µsSRSlew Rate

mA3.6I

V

4 _______________________________________________________________________________________

Single/Dual/Quad, 10MHz

Single-Supply Op Amps

__________________________________________Typical Operating Characteristics

(VCC= 5V, VEE= 0V, TA = +25°C, unless otherwise noted.)

SUPPLY CURRENT PER AMPLIFIER

3.0

2.5

2.0

(mA)

S

I

1.5

1.0

16

15

14

GBW (MHz)

13

12

vs. SUPPLY VOLTAGE









3 456

2

A









-60

VCC-VEE (V)

GAIN-BANDWIDTH PRODUCT

vs. TEMPERATURE

VCL = 40dB

-20 20 60 100 140

TEMPERATURE (°C)

MAX (V)

OUT

V

3.0

473 TOC-01

2.5

2.0

1.5

(mA)

S

I

1.0

0.5

0

20

473 TOC-04

17

14

SLEW RATE (V/µs)

11

8

MAXIMUM OUTPUT VOLTAGE

3.1

3.0

2.9

2.8

2.7

vs. LOAD RESISTANCE

VCC = 3V

V

1V

0.1 1 10 100 1000
LOAD RESISTANCE (kΩ)

SUPPLY CURRENT vs. TEMPERATURE







-60

-20 20 60 100 140

SLEW RATE vs. TEMPERATURE









-60

-20 20 60 100 140

CC

R

L



VCC = 5V

VCC = 3V

TEMPERATURE (°C)



VCC = 5V

VCC = 3V

TEMPERATURE (°C)

473 TOC-07

MIN (V)

OUT

V

INPUT BIAS CURRENT

120

473 TOC-02



100

80



60

(nA)

B

I



40

20

0

-60

-20 20 60 100 140

MAXIMUM OUTPUT VOLTAGE

5.2

473 TOC-05

5.1

5.0

MAX (V)

OUT

4.9

V

4.8

4.7

MINIMUM OUTPUT VOLTAGE

0.5

0.4

0.3

0.2

0.1

0

vs. LOAD RESISTANCE

VCC = 5V

VCC = 3V

0.1 1 10 100 1000 10,000
LOAD RESISTANCE (kΩ)

vs. LOAD RESISTANCE

VCC = 5V

0.1 1 10 100 1000
LOAD RESISTANCE (kΩ)

V

CC

1V

vs. TEMPERATURE

TEMPERATURE (°C)

1V

473 TOC-08

R

L

V

CC

R

L

MAX473/MAX474/MAX475

473 TOC-03

473 TOC-06

_______________________________________________________________________________________

5

Single/Dual/Quad, 10MHz
Single-Supply Op Amps

____________________________Typical Operating Characteristics (continued)

(VCC= 5V, VEE= 0V, TA = +25°C, unless otherwise noted.)

MINIMUM OUTPUT VOLTAGE

50

40

(mV)

I

OUT

30

-V

EE

V

I

20

MIN,

OUT

V

10

0

130

MAX473/MAX474/MAX475

110

90

70

50

OPEN-LOOP GAIN (dB)

30

10

vs. TEMPERATURE

V

1V







-60







-60

CC

VCC = 5V

VCC = 3V

-20 20 60 100 140

TEMPERATURE (°C)

OPEN-LOOP GAIN vs. TEMPERATURE

-20 20 60 100 140



RL = 10kΩ

RL = 600Ω

TEMPERATURE (°C)

100

INPUT REFERRED

CURRENT-NOISE DENSITY

vs. FREQUENCY

473 TOC-09

473 TOC-12

MAXIMUM OUTPUT VOLTAGE

20

15

(mV)

OUT

-V

CC

10

MAX, V

OUT

V

5

0

vs. TEMPERATURE





VCC = 5V



VCC = 3V

-60

-20 20 60 100 140

TEMPERATURE (°C)

OVERSHOOT vs. CAPACITIVE LOAD

40

RL = NO LOAD

30

20

OVERSHOOT (%)

10

0

1 10 1000

VCC = 3V

0.5V STEP

CAPACITIVE LOAD (pF)

473 TOC-15

OPEN-LOOP VOLTAGE GAIN

125

473 TOC-10

115

105

1V

V

CC

95

OPEN-LOOP VOLTAGE GAIN (dB)

85



1000

473 TOC-13

100

VCC = 5V

1.0V STEP

100

-60

-65

AV = +1
V

VOLTAGE-NOISE DENSITY (nV/√Hz)

10

TOTAL HARMONIC DISTORTION

AND NOISE vs. FREQUENCY

= 1.5Vp-p

IN

vs. LOAD RESISTANCE

VCC = 3V

VCC = 5V

0.1 1 10 100 1000 10,000
LOAD RESISTANCE (kΩ)

VOLTAGE-NOISE DENSITY

vs. FREQUENCY

INPUT REFERRED

10 100 1k 10k 100k

FREQUENCY (Hz)

473 TOC-17

473 TOC-11

473 TOC-14

-70

-75

THD + NOISE (dB)

-80

CURRENT-NOISE DENSITY (pA/√Hz)

10

10 100 1k 10k 100k

FREQUENCY (Hz)

-85

-90
10 100 1k 10k 100k

FREQUENCY (Hz)

6 _______________________________________________________________________________________

Single/Dual/Quad, 10MHz

Single-Supply Op Amps

____________________________Typical Operating Characteristics (continued)

(VCC= 5V, VEE= 0V, TA = +25°C, unless otherwise noted.)

POWER-SUPPLY REJECTION RATIO

80

70

60

50

PSRR (dB)

40

30

20

1 10 100 1000

vs. FREQUENCY

V

= 3V ± 300mV

CC

V

= 5V ± 250mV

CC

FREQUENCY (kHz)

GAIN AND PHASE vs. FREQUENCY

VCC = 3V

40

GAIN

20

PHASE

0

GAIN (dB)

-20

-40

1k 10k 100k 1M 10M

10k

100

473 TOC-23

GAIN (dB)





10k

20pF

FREQUENCY (Hz)

UNITY-GAIN FOLLOWER 

FREQUENCY RESPONSE

VCC = 3V

1

= 10kΩ

L

GAIN

20pF

II

FREQUENCY (Hz)

180
144

473 TOC-21

108

PHASE (DEGREES)

72
36
0

-36

-72

-108

-144

-180

R

0

-1
PHASE

-2

-3

1k 10k 100k 1M 10M

180
144

473 TOC-19

108

PHASE (DEGREES)

72
36
0

-36

-72

-108

-144

-180

GAIN AND PHASE vs. FREQUENCY

VCC = 5V

40

GAIN

20

PHASE

0

GAIN (dB)

-20

-40

100

1k 10k 100k 1M 10M

GAIN (dB)

10k

10k

20pF

FREQUENCY (Hz)

-1

-2

-3

-4





UNITY-GAIN FOLLOWER 

FREQUENCY RESPONSE

1

VCC = 5V

= 10kΩ

L

20pF

II

FREQUENCY (Hz)

180
144

473 TOC-22

108

PHASE (DEGREES)

72
36
0

-36

-72

-108

-144

-180

R

0

GAIN

PHASE

1k 10k 100k 1M 10M

MAX473/MAX474/MAX475

180
144

473 TOC-20

108

PHASE (DEGREES)

72
36
0

-36

-72

-108

-144

-180

0.1Hz to 10Hz VOLTAGE NOISE

1k

1k

POWER-UP TIME

100k

10pF

INPUT REFERRED VOLTAGE (2µV/div)

500ns/div

1sec/div

A : VCC, 5V/div
B : V

, 1V/div

OUT

_______________________________________________________________________________________

A

B

7

Single/Dual/Quad, 10MHz
Single-Supply Op Amps

____________________________Typical Operating Characteristics (continued)

(VCC= 5V, VEE= 0V, TA = +25°C, unless otherwise noted.)

SMALL-SIGNAL TRANSIENT RESPONSE

(V

= 5V)

CC

A


0.5V

B


0.5V

200ns/div

VCC = 5V, AV = +1, RL = 10kΩ, CL = 220pF
A : V

, 50mV/div

IN

B : V

, 50mV/div

OUT

MAX473/MAX474/MAX475

LARGE-SIGNAL TRANSIENT RESPONSE

A


0.5V

B



0.5V

200ns/div

= 5V, AV = +1, RL = 10kΩ, CL = 220pF

V

CC

A : V

, 1V/div

IN

B : V

, 500mV/div

OUT

SMALL-SIGNAL TRANSIENT RESPONSE

(V

= 3V)

CC

200ns/div

VCC = 3V, AV = +1, RL = 10kΩ, CL = 100pF
A : V

, 50mV/div

IN

B : V

, 50mV/div

OUT

OVERDRIVING THE OUTPUT

200ns/div

VCC = 5V, VIN- = 2.0V, RL = 10kΩ, CL = 33pF
A : V

+, 1V/div

IN

B : V

, 1V/div

OUT

A


0.5V

B


0.5V

A

1.5V

B

0V

8 _______________________________________________________________________________________

Single/Dual/Quad, 10MHz

Single-Supply Op Amps

______________________________________________________________Pin Description

MAX473

PIN

MAX474

—1, 8

MAX475

—

1

—

2

—

3
11
—

5
—

6

7

4

NAME

NULL

OUTA

IN-

INA-

IN+

INA+

V

EE

N.C.

INB+

OUT
INB-

OUTB

V

CC

FUNCTION

Offset Null Input. Connect to one end of 2kΩ potentiometer for offset voltage
trimming. Connect wiper to VEE. See Figure 1.

Amplifier A Output1—
Inverting Input—2
Amplifier A Inverting Input2—
Noninverting Input—3
Amplifier A Noninverting Input3—
Negative Power-Supply Pin. Connect to ground or a negative voltage.44
No Connect—not internally connected—5
Amplifier B Noninverting Input5—
Amplifier Output —6
Amplifier B Inverting Input6—
Amplifier B Output7—
Positive Power-Supply Pin. Connect to (+) terminal of power supply.87
Amplifier C OutputOUTC8——
Amplifier C Inverting InputINC-9——
Amplifier C Noninverting InputINC+10——
Amplifier D Noninverting InputIND+12——
Amplifier D Inverting InputIND-13——
Amplifier D OutputOUTD14——

MAX473/MAX474/MAX475

__________Applications Information

Power Supplies

The MAX473/MAX474/MAX475 operate from a single

2.7V to 5.25V power supply, or from dual supplies of
±1.35V to ±2.625V. For single-supply operation,
bypass the power supply with 0.1µF. If operating from
dual supplies, bypass each supply to ground. With

0.1µF bypass capacitance, channel separation
(MAX474/MAX475) is typically better than 120dB with
signal frequencies up to 300kHz. Increasing the
bypass capacitance (e.g. 10µF || 0.1µF) maintains
channel separation at higher frequencies.

Minimizing Offsets

The MAX473’s maximum offset voltage is ±2mV
(TA= +25°C). If additional offset adjustment is required,
connect a 2kΩ trim potentiometer between pins 1, 8, and
4 (Figure 1). Input offset voltage for the dual MAX474
and quad MAX475 cannot be externally trimmed.

_______________________________________________________________________________________ 9

The MAX473/MAX474/MAX475 are bipolar op amps
with low input bias currents. The bias currents at both
inputs flow out of the device. Matching the resistance
at the op amp’s inputs significantly reduces the offset
error caused by the bias currents. Place a resistor (R3)
from the noninverting input to ground when using the
inverting configuration (Figure 2a); place R3 in series
with the noninverting input when using the noninverting
configuration (Figure 2b). Select R3 such that the paral­lel combination of R2 and R1 equals R3. Adding R3 will
slightly increase the op amp’s voltage noise.

Output Loading and Stability

The MAX473/MAX474/MAX475 op amps are unity-gain
stable. Any op amp’s stability depends on the configu­ration, closed-loop gain, and load capacitance. The
unity-gain, noninverting buffer is the most sensitive gain
configuration, and driving capacitive loads decreases
stability.

Single/Dual/Quad, 10MHz
Single-Supply Op Amps

R2

2k

1

NULL

MAX473

4

V

EE

Figure 1. Offset Null Circuit

The MAX473/MAX474/MAX475 have excellent phase

MAX473/MAX474/MAX475

margin (the difference between 180° and the unity-gain

NULL

8

phase angle). It is typically 63° with a load of 10kΩ in
parallel with 20pF. Generally, higher phase margins
indicate greater stability.

Capacitive loads form an RC network with the op amp’s
output resistance, causing additional phase shift that
reduces the phase margin. Figure 3 shows the
MAX473/MAX474/MAX475 output response when dri­ving a 390pF load in parallel with 10kΩ.

When driving large capacitive loads, add an output iso­lation resistor, as shown in Figure 4. This resistor
improves the phase margin by isolating the load
capacitance from the amplifier output. Figure 5 shows
the MAX473/MAX474/MAX475 driving a capacitive load
of 1000pF using the circuit of Figure 4.

Feedback Resistors

The feedback resistors appear as a resistance network
to the op amp’s feedback input (Figure 2). This resis­tance, combined with the op amp’s input and stray
capacitance (total input capacitance), forms a pole that
adds unwanted phase shift when either the total input
capacitance or feedback resistance is too large. For
example, using the noninverting configuration with a
gain of 10, if the total capacitance at the negative input
is 10pF and the effective resistance (R1 ||R2) is 9kΩ,
this RC network introduces a pole at fo= 1.8MHz. At

IN

V

IN

R3 = R2R1

R1

V

OUT

R3

R3 = R2R1

R3

V

OUT

R2

R1

, the pole introduces addi-

o

V

Figure 2a. Reducing Offset Error Due to Bias Current:
Inverting Configuration

Figure 2b. Reducing Offset Error Due to Bias Current:
Noninverting Configuration

input frequencies above f
tional phase shift, which reduces the overall bandwidth
and adversely affects stability. Choose feedback resis­tors small enough so they do not adversely affect the
op amp’s operation at the frequencies of interest.

Overdriving the Outputs

The output voltage swing for specified operation is from
(VEE+ 0.3V) to (VCC- 0.5V) (

see Electrical Characteristics

Exercising the outputs beyond these limits drives the out­put transistors toward saturation, resulting in bandwidth
degradation, response-time increase, and gain decrease
(which affects linearity). Operation in this region causes a
slight distortion in the output waveform, but does not
adversely affect the op amp.

).

10 ______________________________________________________________________________________

Driving 390pF in parallel with 10kΩ,

= 5V, buffer configuration

V

CC

Single/Dual/Quad, 10MHz

Single-Supply Op Amps

MAX473/MAX474/MAX475

Figure 3. MAX474 Driving 390pF

MAX473/MAX474/

MAX475

RL

10Ω

V

IN

Figure 4. Capacitive-Load Driving Circuit

V

OUT

C

L

Full-Power Bandwidth

The MAX473/MAX474/MAX475’s fast 15V/µs slew rate
maximizes full-power bandwidth (FPBW). The FPBW is
given by:

FPBW (Hz) = —————————————

π [V

SR

peak-to-peak(max)]

OUT

where the slew rate (SR) is 15V/µs min. Figure 6 shows
the full-power bandwidth as a function of the peak-to­peak AC output voltage.

Figure 5. The MAX473 easily drives 1000pF using the
Capacitive-Load Driving Circuit (Figure 4).

100

SMALL-SIGNAL 

10

1

FULL-POWER BANDWIDTH (MHz)

0.1

Figure 6. Full-Power Bandwidth vs. Peak-to-Peak AC Voltage

FULL-POWER

BANDWIDTH

01 342

OUTPUT VOLTAGE SWING (Vp-p)

GAIN BANDWIDTH

MAX473-FIG6

Layout

A good layout improves performance by decreasing
the amount of stray capacitance at the amplifier’s
inputs and output. Since stray capacitance might be
unavoidable, minimize trace lengths and resistor leads,
and place external components as close to the pins as
possible.

______________________________________________________________________________________ 11

Single/Dual/Quad, 10MHz
Single-Supply Op Amps

_Ordering Information (continued)

PART

MAX474CPA

MAX474CSA
MAX474CUA 0°C to +70°C 8 µMAX
MAX474C/D 0°C to +70°C
MAX474EPA -40°C to +85°C 8 Plastic DIP
MAX474ESA -40°C to +85°C 8 SO
MAX474MJA -55°C to +125°C 8 CERDIP
MAX475CPD
MAX475CSD 0°C to +70°C 14 SO
MAX475EPD -40°C to +85°C 14 Plastic DIP
MAX475ESD -40°C to +85°C 14 SO
MAX475MJD -55°C to +125°C 14 CERDIP

* Dice are specified at TA= +25°C, DC parameters only.

TEMP. RANGE PIN-PACKAGE

0°C to +70°C
0°C to +70°C

8 Plastic DIP
8 SO

Dice*

0°C to +70°C 14 Plastic DIP

____Pin Configurations (continued)

MAX473/MAX474/MAX475

TOP VIEW

OUTA

INA­INA+

V
INB+
INB-

OUTB

1
2

A

3

CC

4

MAX475

5

B

6
7

OUTD

14

IND-

13

D

IND+

12

V

11

EE

INC+

10

C

INC-

9

OUTC

8

_________________Chip Topographies

MAX473

NULL

IN-

IN+

V

EE

0.052"

(1.321mm)

TRANSISTOR COUNT: 185
SUBSTRATE CONNECTED TO V

MAX474

V

CC

OUTA

INA-

INA+

EE

NULL

V

CC

0.065"

(1.651mm)

OUT

OUTB

INB-

0.084"

(2.134mm)

INB+

DIP/SO

VEE

0.058"

(1.473mm)

TRANSISTOR COUNT: 355
SUBSTRATE CONNECTED TO V

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.

12

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© 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

EE