Maxim MAX4196ESA, MAX4195ESA, MAX4194ESA, MAX4197ESA Datasheet

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General Description

The MAX4194 is a variable-gain precision instrumenta­tion amplifier that combines Rail-to-Rail®single-supply
operation, outstanding precision specifications, and a
high gain bandwidth. This amplifier is also offered in
three fixed-gain versions: the MAX4195 (G = +1V/V),
the MAX4196 (G = +10V/V), and the MAX4197 (G =
+100V/V). The fixed-gain instrumentation amplifiers fea­ture a shutdown function that reduces the quiescent
current to 8µA. A traditional three operational amplifier
configuration is used to achieve maximum DC preci­sion.

The MAX4194–MAX4197 have rail-to-rail outputs and
inputs that can swing to within 200mV of the negative rail
and to within 1.1V of the positive rail. All parts draw only
93µA and operate from a single +2.7V to +7.5V supply
or from dual ±1.35V to ±3.75V supplies. These amplifiers
are offered in 8-pin SO packages and are specified for
the extended temperature range (-40°C to +85°C).

See the MAX4198/MAX4199 data sheet for single-sup­ply, precision differential amplifiers.

Applications

Medical Equipment
Thermocouple Amplifier
4–20mA Loop Transmitters
Data-Acquisition Systems
Battery-Powered/Portable Equipment
Transducer Interface
Bridge Amplifier

Features

♦ +2.7V Single-Supply Operation
♦ Low Power Consumption

93µA Supply Current
8µA Shutdown Current (MAX4195/96/97)

♦ High Common-Mode Rejection: 115dB (G = +10V/V)
♦ Low 50µV Input Offset Voltage (G ≥ +100V/V)
♦ Low ±0.01% Gain Error (G = +1V/V)
♦ 250kHz -3dB Bandwidth (G = +1V/V, MAX4194)
♦ Rail-to-Rail Outputs

MAX4194–MAX4197

Micropower, Single-Supply, Rail-to-Rail,

Precision Instrumentation Amplifiers

________________________________________________________________

Maxim Integrated Products

1

OUT

REFV

EE

1
2

87RG+

V

CC

IN-

IN+

RG-

SO

TOP VIEW

3

4

6

5

MAX4194

OUT

FBV

EE

1
2

87SHDN

V

CC

IN-

IN+

REF

SO

3

4

6

5

MAX4195
MAX4196
MAX4197

19-1468; Rev 0; 4/99

PART

MAX4194ESA
MAX4195ESA
MAX4196ESA

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

8 SO
8 SO
8 SO

Pin Configurations

Ordering Information

MAX4197ESA

-40°C to +85°C 8 SO

PART

MAX4194
MAX4195
MAX4196 Yes

Yes

No

SHUTDOWN GAIN (V/V)

Variable

+1

+10

MAX4197 Yes +100

Selector Guide

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

CMRR (dB)

95 (G = +1V/V)

95
115
115

MAX4194–MAX4197

Micropower, Single-Supply, Rail-to-Rail,
Precision Instrumentation Amplifiers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= 0, RL= 25kΩ tied to VCC/2, V

REF

= VCC/2, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.)

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 (VCCto VEE)..................................................+8V

All Other Pins ..................................(VCC+ 0.3V) to (VEE- 0.3V)

Current into Any Pin..........................................................±30mA

Output Short-Circuit Duration (to VCCor VEE)........... Continuous

Continuous Power Dissipation (TA= +70°C)

SO (derate 5.9mW/°C above +70°C)........................... 471mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range.............................-65°C to +150°C

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

I

SHDN

= VIL, MAX4195/96/97 only µA

Inferred by PSR

test

VCM= VEE+ 0.2V
to VCC- 1.1V,
f = 120Hz

VCM= VEE+ 0.2V
to VCC- 1.1V,
TA= T

MIN

to T

MAX

,

∆RS= 1kΩ

115

VCM= VCC/2

Differential

90 115

VCM= VEE+ 0.2V
to V

CC

- 1.1V,

T

A

= +25°C,

∆R

S

= 1kΩ

G = +1V/V

Common mode

VIN+ = VIN- = VCC/2, V

DIFF

= 0

G = +1V/V, VCM= VCC/2, TA= +25°C

Inferred from CMR test

VCM= VCC/2

CONDITIONS

106

101

dB

85

CMR

AC

AC Common-Mode Rejection

88 115

115

G = +1V/V

73 95

G = +10V/V

95 115

G = +100V/V

G = +1V/V
G = +10V/V

93 115

G = +100V/V
G = +1000V/V

dB

78 95

CMR

DC

DC Common-Mode Rejection

VVEE+ 0.2 VCC- 1.1V

IN

Input Voltage Range

Differential

1000

Common mode 4

812

I

SHDN

Shutdown Current

V

±1.35 ±3.75

pF

2.7 7.5

V

CC

Supply Voltage Range

1

MΩ

1000

R

IN

Input Resistance

C

IN

Input Capacitance

G = +1V/V
G = +10V/V

µV/°C

±1.0 ±4.0

TC

VOS

Input Offset Voltage Drift
(Note 1)

µA

93 110

I

CC

Quiescent Current

G = +100V/V

±100 ±450

G = +1000V/V

UNITSMIN TYP MAXSYMBOLPARAMETER

Single supply
Dual supplies

G ≥ +10V/V ±0.5 ±2.0

G = +10V/V, VCM= VCC/2, TA= +25°C

±75 ±225

G = +1000V/V, VCM= VCC/2, TA= +25°C

±50

G = +100V/V, VCM= VCC/2, TA= +25°C

±50 ±225

G = +10V/V, VCM= VCC/2, TA= T

MIN

to T

MAX

±75 ±345

G = +1V/V, VCM= VCC/2, TA= T

MIN

to T

MAX

G = +1000V/V, VCM= VCC/2, TA= T

MIN

to

µVV

OS

Input Offset Voltage

±50

G = +100V/V, VCM= VCC/2, TA= T

MIN

to

±50 ±345

±100 ±690

MAX4194–MAX4197

Micropower, Single-Supply, Rail-to-Rail,

Precision Instrumentation Amplifiers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, VEE= 0, RL= 25kΩ tied to VCC/2, V

REF

= VCC/2, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.)

VCM= VCC/2

VCM= VCC/2

+2.7V ≤ VCC≤ +7.5V; VCM= +1.5V;
V

OUT

= +1.5V; V

REF

= +1.5V; RL= 25kΩ to

+1.5V; G = +1V/V, +10V/V, +100V/V

RL= 25kΩ to VCC/2

MAX4194 only

f = 0.1Hz to 10Hz

f = 10kHz

VCM= VCC/2

f = 10Hz

RL= 5kΩ to VCC/2

f = 100Hz

CONDITIONS

±0.01 ±0.1

1+ (50kΩ/RG)Gain Equation

mA±4.5I

SC

Short-Circuit Current (Note 2)

mV

100 200

VOH, V

OL

Output Voltage Swing

100 200

nA±1.0 ±3.0I

OS

Input Offset Current

pA/°C15TC

IB

dB90 120PSRPower-Supply Rejection

Input Bias Current Drift

30 100

30 100

pA

RMS

16

i

n

Input Noise Current

pA√Hz

0.1

pA/°C15TC

IOS

Input Offset Current Drift

85

2.4

0.76

UNITSMIN TYP MAXSYMBOLPARAMETER

f = 10Hz

75f = 100Hz

nV√Hz

72f = 10KHz

G = +1V/V

µV

RMS

1.4f = 0.1Hz to 10Hz
35f = 10Hz
32f = 100Hz

nV√Hz

31f = 10KHz

G = +10V/V

µV

RMS

0.7f = 0.1Hz to 10Hz
32f = 10Hz
31f = 100Hz

nV√Hz

8.7f = 10KHz

G = +100V/V

µV

RMS

0.6

e

n

Input Noise Voltage

f = 0.1Hz to 10Hz

VCC- V

OH

V

OL

VCC- V

OH

V

OL

G = +1V/V
G = +10V/V ±0.03 ±0.3

TA= +25°C,
VCM= VCC/2,
RL= 25kΩ,
VEE+ 0.1V ≤ V

OUT

≤ VCC- 0.1V

G = +1000V/V, MAX4194 ±0.5

G = +100V/V ±0.05 ±0.5

G = +10V/V ±0.03 ±0.3

TA= +25°C,
VCM= VCC/2,
RL= 5kΩ,
VEE+ 0.2V ≤ V

OUT

≤ VCC- 0.2V

G = +1000V/V, MAX4194

G = +1V/V

%

±0.5

Gain Error

G = +100V/V ±0.05 ±0.5

±0.01 ±0.1

VCM= VCC/2 nA620I

B

Input Bias Current

MAX4194–MAX4197

Micropower, Single-Supply, Rail-to-Rail,
Precision Instrumentation Amplifiers

4 _______________________________________________________________________________________

Note 1: Guaranteed by design.
Note 2: Maximum output current (sinking/sourcing) in which the gain changes by less than 0.1%.
Note 3: This specification represents the typical temperature coefficient of an on-chip thin film resistor. In practice, the temperature

coefficient of the gain for the MAX4194 will be dominated by the temperature coefficient of the external gain-setting resistor.

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, VEE= 0, RL= 25kΩ tied to VCC/2, V

REF

= VCC/2, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.)

V

SHDN

= VCC- 2.5V to VCC- 1.5V, G = +100V/V,

0.1%, V

OUT

= +3.5V

G = +1V/V, 0.1%, V

OUT

= +3.5V

MAX4196/MAX4197

G = +1V/V, 0.1%,
V

OUT

= +3.5V

MAX4194/MAX4195, G = +1V/V

G = +1V/V, 0.1%,
V

OUT

= +3V

VEE< V

SHDN

< V

CC

V

OUT

= 2Vp-p, G = +1V/V, f = 1kHz

V

OUT

= 2Vp-p, G = +1V/V

MAX4194

VEE+ 0.1V ≤ V

OUT

≤ VCC- 0.1V, VCM= VCC/2,

G = +1V/V, +10V/V, +100V/V, +1000V/V

0.1%, V

OUT

= 2Vp-p

CONDITIONS

ms0.5t

ON/OFF

On/Off Settling Time

ms1Power-Up Delay

ms0.5t

ENABLE

Enable Time From Shutdown

ms0.5t

SHDN

Time to Shutdown

µA±0.1

SHDN Input Current

VVCC- 2.5V

IL

Input Logic Voltage Low

VVCC- 1.5V

IH

Input Logic Voltage High

%0.001THDTotal Harmonic Distortion

ms

7

t

S

Settling Time

5

ppm/°C±16

ppm/°C

±1 ±15

±1 ±8

Gain Temperature Coefficient
(Note 1)

0.04

0.05

V/µs0.06SRSlew Rate

250

TC

50kΩ

50kΩ Resistance Temperature
Coefficient (Note 3)

%±0.001Nonlinearity

pF300C

L

Capacitive Load Stability

UNITSMIN TYP MAXSYMBOLPARAMETER

MAX4194

G = +1V/V

MAX4195 220
MAX4194

G = +10V/V

MAX4196

17
34

MAX4194 1.5

G = +100V/V

MAX4197

G = +1000V/V

V

OUT

≤ 0.1Vp-p,

VCM= VCC/2

MAX4194

kHz

3.1

0.147

BW-

3dB

-3dB Bandwidth

G = +1V/V
G = +10V/V
G = +100V/V
G = +1000V/V

MAX4195/MAX4196/
MAX4197 only

MAX4195/MAX4196/
MAX4197 only

MAX4195/MAX4196/
MAX4197 only