MAXIM MAX9633 Technical data

19-5199; Rev 1; 1/11

EVALUATION KIT

AVAILABLE

Dual 36V Op Amp for 18-Bit

General Description

The MAX9633 is a low-noise, low-distortion operational amplifier that is optimized to drive ADCs for use in applications from DC to a few MHz. The MAX9633 features low noise (3nV/√Hz at 1kHz and 3.5nV/√Hz at 100Hz) and low distortion (130dB at 10kHz), making it suitable for industrial, medical, and test applications.

The exceptionally fast settling-time and low input offset voltage makes the IC an excellent solution to drive highresolution 12-bit to 18-bit SAR ADCs.

The IC operates from a wide supply voltage range up to 36V with only 3.5mA of quiescent current per amplifier.

The IC is offered in an 8-pin, 3mm x 3mm TDFN package for operation over the -40NC to +125NC temperature range.

Applications

ADC Drivers

Data Acquisition and Instrumentation

Power Grid Systems

Motor Control

Test and Measurement Equipments

Imaging Systems

High-Performance Audio Circuitry

SAR ADC Front-End

Features

S Low-Noise (3nV/√Hz at 1kHz) and Low-Distortion

(130dB at 10kHz) ADC Driver

S Very Fast 750ns Settling Time to 16-Bit Accuracy

S Low Input Voltage Offset 200µV (max)

S Low 0.9µV/°C Input Offset Temperature Coefficient

S Gain-Bandwidth Product 27MHz

S 4.5V to 36V Wide Supply Range

S Unity Gain Stable

S ±6kV ESD Protection HBM

S 8-Pin TDFN and SOIC Packages

Ordering Information

PART TEMP RANGE

MAX9633ASA+ MAX9633ATA+

+Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad.

-40NC to +125NC

PINPACKAGE

8 SO-EP* — 8 TDFN-EP* BMM

TOP

MARK

MAX9633

Typical Application Circuit

R1

MAX9633

R2

+15V

-15V

-3dB AT 8MHz

R

= 20I

I

C = 1nF

12 TO 18-BIT SAR ADC

EXAMPLE: MAX1320

14-BIT ADC

ANTI-ALIAS FILTER

IN

R R

C

_______________________________________________________________ Maxim Integrated Products 1

C

1MI

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Dual 36V Op Amp for 18-Bit SAR ADC Front-End

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC to VEE).................................-0.3V to +40V

All Other Pins ..................................(V

Short-Circuit Duration of OUTA, OUTB ................................. 10s

Continuous Input Current (any pins) ............................... ±20mA

Continuous Power Dissipation (T

SO (derate 24.4mW/NC above +70NC)

Multilayer Board .....................................................1951.2mW

- 0.3V) to (VCC + 0.3V)

EE

= +70NC)

A

TDFN (derate 24.4mW/NC above +70NC)

Multilayer Board ........................................................1905mW

Operating Temperature Range ........................ -40NC to +125NC

Junction Temperature .....................................................+150NC

Storage Temperature Range ............................ -65NC to +150NC

Soldering Temperature (reflow) ......................................+260NC

MAX9633

PACKAGE THERMAL CHARACTERISTICS (Note 1)

SO-EP

Junction-to-Ambient Thermal Resistance (q Junction-to-Case Thermal Resistance (q

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

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.

) ..........41°C/W

JA

) .................7°C/W

JC

ELECTRICAL CHARACTERISTICS

(VCC = +15V, VEE = -15V, VCM = 0V, RL = 10kI to V T

= +25NC.) (Note 2)

A

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLY

Supply Voltage Rang

Supply Current I

Power-Supply Rejection Ratio PSRR

DC SPECIFICATIONS

Input Offset Voltage V

Input Offset Voltage Drift (Note 3)

Input Bias Current I

Input Offset Current I

Input Voltage Range V

Common-Mode Rejection Ratio CMRR

e

VCC - VEEGuaranteed by PSRR 4.5 36 V

CC

OS

DV

OS

IN+

Per amplifier

+4.5V P (V P +36V

TA = +25NC Q70 Q200

-40NC P T

-40NC P TA P +125NC

OS

(VEE + 0.45V) P VCM P (VCC - 1.8V) Q42 Q400

B

V

EE

(VEE + 0.45V) P VCM P (VCC - 1.8V) Q30 Q300 V

EE

, V

Guaranteed by CMRR

IN-

V

EE

V

EE

+125NC

= 0V, TA = T

GND

CC

P +125NC Q290

A

P VCM P (VCC - 1.8V)

P VCM P (VCC - 1.8V) Q200 Q2000

P VCM P (VCC - 1.7V), TA = +25NC

P VCM P (VCC - 1.8V), -40NC P TA P

- VEE)

TDFN-EP

Junction-to-Ambient Thermal Resistance (q

Junction-to-Case Thermal Resistance (q

to T

MIN

= +25NC

T

A

-40NC P T

-40NC P T T

= +25NC

A

-40NC P T

T

A

-40NC P T +125NC

, unless otherwise noted. Typical values are at

MAX

3.5 5

P +85NC

A

P +125NC

A

112 135

P +125NC

A

= +25NC

A

P

110

0.2 0.9

4.5 22

V

EE

V

EE

106 130

105 130

) ..........42°C/W

JA

) .................8°C/W

JC

6

6.5

VCC -

1.7

VCC -

1.8

mA

dB

FV

FV/NC

nA FA

nA

V

dB

2

Dual 36V Op Amp for 18-Bit

SAR ADC Front-End

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +15V, VEE = -15V, VCM = 0V, RL = 10kI to V T

= +25NC.) (Note 2)

A

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Open-Loop Gain A

V

VOL

OH

(VEE + 0.3V) P V (V

VCC - V

Output Voltage Swing

Short-Circuit Current I

V

OL

SC

V

OUT

TA = +25NC AC SPECIFICATIONS Gain Bandwidth GBWP 27 MHz Slew Rate SR

Output Transient Recovery Time t

TR

Settling Time t

Total Harmonic Distortion THD

5V step, R

To 0.001%, DV

= 1nF, AV = +1V/V

To 0.001%, 5V step,

S

AV = -1V/V

V

OUT

20I, C

+1V/V

V Crosstalk

Input Voltage Noise Density e

Input Voltage Noise

Input Current Noise Density i

Capacitive Loading C

n

L

OUT

20I, C

f = 100Hz 3.5

f = 1kHz 3

0.1Hz P f P 10Hz

f = 100Hz 12

f = 1kHz 10

No sustained oscillation, AV = +1V/V 50 pF

Note 2: All devices are 100% production tested at T Note 3: Guaranteed by design.

GND

+ 0.45V) P V

EE

OUT

= 0V, TA = T

P (VCC - 2V), RL = 10kI

OUT

MIN

to T

, unless otherwise noted. Typical values are at

MAX

P (VCC - 2.1V), RL = 1kI

RL = 10kI R

= 1kI

L

118 140 115 138

RL = 10kI R

= 1kI

- V

EE

= 20I, CL = 1nF, AV = 1V/V

S

= 200mV, RS = 20I, CL

OUT

L

R

= 10kI to V

L

R

= 1kI to V

L

= 100I, CL =

R

S

EE

30pF

R

= 20I, CL =

S

1nF

= 10V

P-P

= 1nF, AV =

L

, RS =

f = 1kHz 145

f = 100kHz -100

= 10V

L

= +25NC. Temperature limits are guaranteed by design.

A

P-P

= 1nF

, RS =

f = 1kHz -100 f = 10kHz -90

1.6 1.9

1.7 2.0 70 150

170 300

20 100 20 100 50 mA

18

V/Fs

500 ns

750

nV/√Hz

250 nV

pA/√Hz

MAX9633

dB

V

mV

ns

dBf = 10kHz 130

dB

P-P

3

Dual 36V Op Amp for 18-Bit SAR ADC Front-End

Typical Operating Characteristics

(VCC = +15V, VEE = -15V, VCM = 0V, outputs have RL = 10kI connected to V otherwise noted.)

= 0V. Typical values are at TA = +25NC, unless

GND

50

45

MAX9633

40

35

30

25

20

OCCURRENCES (%)

15

10

5

0

-180

INPUT OFFSET VOLTAGE

vs. INPUT COMMON MODE

60

55

50

TA = +85°C

VOS HISTOGRAM

45

(µV)

40

OS

V

35

30

25

20

-15 15

TA = +25°C

TA = -40°C

INPUT COMMON MODE (V)

VOS (µV)

TA = +125°C

TA = 0°C

50

45

180100 140-100 -60 -20 20 60-140

MAX9633 toc01

40

35

30

25

20

FREQUENCY (%)

15

10

5

0

-0.5 VOS DRIFT (µV/°C)

MAX9633 toc02

0.50.40.2 0.3-0.3 -0.2 -0.1 0 0.1-0.4

INPUT OFFSET VOLTAGE

vs. SUPPLY VOLTAGE

60

VOS DRIFT HISTOGRAM

55

MAX9633 toc04

50

45

(µV)

40

OS

V

35

TA = -40°C

30

25

105-10 -5 0

20

0 40

TA = +125°C

TA = +85°C

TA = +25°C

TA = 0°C

SUPPLY VOLTAGE (V)

MAX9633 toc05

302010

SUPPLY CURRENT vs. SUPPLY VOLTAGE

6

5

4

3

2

SUPPLY CURRENT (mA)

1

0

TA = +85°C

TA = +25°C

TA = -40°C

0 40

SUPPLY VOLTAGE (V)

TA = +125°C

TA = 0°C

BIAS CURRENT

vs. INPUT COMMON MODE

50

48

46

44

42

40

38

BIAS CURRENT (nA)

36

34

32

30

-15 15 INPUT COMMON MODE (V)

TA = +125°C

TA = +85°C

TA = +25°C

TA = 0°C

TA = -40°C

MAX9633 toc03

3530252015105

MAX9633 toc06

1050-5-10

BIAS CURRENT vs. SUPPLY VOLTAGE

50

48

46

44

42

40

38

BIAS CURRENT (nA)

36

34

32

30

4

TA = +125°C

TA = +85°C

TA = -40°C

SUPPLY VOLTAGE (V)

TA = +25°C

TA = 0°C

3020 2510 1550 40

35

MAX9633 toc07

DC COMMON-MODE REJECTION RATIO

vs. TEMPERATURE

0

-20

-40

-60

-80

CMRR (dB)

-100

-120

-140

-160

TEMPERATURE (°C)

120100-40 -20 0 40 6020 80-60 140

MAX9633 toc08

DC PSRR vs. TEMPERTURE

0

-20

-40

-60

PSRR (dB)

-80

-100

-120

-140

-50 125

TEMPERATURE (°C)

MAX9633 toc09

1007525 500-25

Dual 36V Op Amp for 18-Bit

0

SAR ADC Front-End

Typical Operating Characteristics (continued)

(VCC = +15V, VEE = -15V, VCM = 0V, outputs have RL = 10kI connected to V otherwise noted.)

COMMON-MODE REJECTION RATIO

vs. FREQUENCY

0

-20

-40

-60

CMRR (dB)

-80

-100

-120

0.1 100,000 FREQUENCY (kHz)

SMALL-SIGNAL UNITY GAIN

vs. FREQUENCY

20

15

10

5

0

GAIN (dB)

-5

-10

-15

-20 10 100,000

FREQUENCY (kHz)

10,0001000100

MAX9633 toc10

10,0001000100101

MAX9633 toc13

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

0

-20

-40

-60

PSRR (dB)

-80

-100

-120

-140 1 100,000

FREQUENCY (kHz)

LARGE-SIGNAL UNITY GAIN

vs. FREQUENCY

20

15

10

5

0

GAIN (dB)

-5

-10

-15

-20 1

10 100

1000

FREQUENCY (kHz)

= 0V. Typical values are at TA = +25NC, unless

GND

OPEN-LOOP GAIN vs. FREQUENCY

160

140

MAX9633 toc11

120

100

80

60

40

OPEN-LOOP GAIN (dB)

20

0

-20

10,000100010010

0.001 100,000 FREQUENCY (kHz)

INPUT REFERED VOLTAGE NOISE

vs. FREQUENCY

40

MAX9633 toc14

100,00010,000

1,000,00

35

30

25

20

15

10

5

INPUT REFERED VOLTAGE NOISE (nV/√Hz)

0

0.1 100k FREQUENCY (Hz)

R C

1000100.1

ISO LOAD

= 20I

= 1nF

10k1k1 10 100

MAX9633

MAX9633 toc12

MAX9633 toc15

100nV/div

0.1Hz TO 10Hz NOISE vs. TIME

10s/div

MAX9633 toc16

CURRENT NOISE vs. FREQUENCY

200

180

160

140

120

100

80

60

CURRENT NOISE (pA/√Hz)

40

20

0

0.1 100k FREQUENCY (Hz)

INPUT INFERRED

MAX9633 toc17

10k1k100101

5