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MAX5426AEUD+T

P1-P3P4-P6P7-P9
General Description
The MAX5426 is a precision resistor network optimized
for use with programmable instrumentation amplifiers.
The MAX5426 operates from dual ±5V to ±15V supplies
and consumes less than 40µA of supply current.
Designed to be used in the traditional three op amp
instrumentation amplifier topology, this device provides
noninverting gains of 1, 2, 4, and 8 that are accurate to
0.025% (A-grade), 0.09% (B-grade), or 0.5%
(C-grade) over the extended temperature range (-40°C
to +85°C). The MAX5426 is available in the 6.4mm ✕
5mm 14-pin TSSOP package.
Applications
General-Purpose Programmable Instrumentation
Amplifiers
Gain Control in RF Power Amplifiers
Precision Dual Attenuator
Features
♦ Differential Gains: A
V
= 1, 2, 4, 8
♦ Gain Accurate to 0.025%, 0.09%, or 0.5%
♦ Dual Supply ±5V to ±15V Operation
♦ Low 36µA Supply Current
♦ Simple CMOS/TTL Logic Compatible 2-Wire
Parallel Interface
♦ Space-Saving 14-Pin TSSOP Package
(6.4mm
✕
5mm)
♦ OFFSET Pin Available to Offset the Output of the
Differential Amplifier
MAX5426
Precision Resistor Network for
Programmable Instrumentation Amplifiers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2318; Rev 0; 1/02
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP
RANGE
PIN-
PACKAGE
GAIN
MAX5426AEUD -40°C to +85°C 14 TSSOP 0.025%
MAX5426BEUD -40°C to +85°C 14 TSSOP 0.09%
MAX5426CEUD -40°C to +85°C 14 TSSOP 0.5%
CM
FB2
INDIF-
OUT2 INDIF+
OUT
OFFSET
V
DD
V
IN-
V
IN+
GND
D1
D0
FB1 OUT1
V
SS
V
OUT
MAX5426
Typical Operating Circuit
Pin Configuration and Functional Diagram appear at
end of data sheet.
MAX5426
Precision Resistor Network for
Programmable Instrumentation Amplifiers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +15V, V
SS
= -15V, GND = 0, T
A
= 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.
V
DD
to GND............................................................-0.3V to +17V
V
SS
to GND.............................................................-17V to +0.3V
D0, D1 to GND ...........................................-0.3V to (V
DD
+ 0.2V)
D0, D1 to GND (V
DD
> +6V) .................................-0.3V to +6.0V
All Other Pins to GND ......................(V
SS
- 0.3V) to (V
DD
+ 0.2V)
Maximum Current Into V
DD
, V
SS
, D1, D0 .........................±50mA
Maximum Current from OUT1 to CM or OUT2 ..............±0.72mA
Maximum Current from OUT1 to INDIF- or OUT............±0.72mA
Maximum Current from OUT2 to INDIF+ or OFFSET.....±0.72mA
Continuous Power Dissipation (T
A
= +70°C)
14-Pin TSSOP (derate 9.1mW/°C above +70°C) ..........727mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX5426A 0.004 0.025
MAX5426B 0.025 0.090
Gain Range Accuracy (Notes 1, 2)
MAX5426C 0.080 0.500
%
Capacitance at Analog Pins C
ANALOG
5pF
Gain = 1 79
Gain = 2 85
Gain = 4 91
Differential CMRR (Notes 1, 2)
Gain = 8 97
dB
DIGITAL INPUTS
Input High Voltage V
IH
2.4 V
Input Low Voltage V
IL
0.8 V
Input Leakage Current I
LKG
D1 = D0 = 0 or logic high 10 µA
EQUIVALENT RESISTANCES
Resistance Between OUT1 and
OUT2
R
OUT1
,
R
OUT2
56 kΩ
Resistance Between OUT1 and
INDIF-
R
OUT1
,
R
INDIF-
26 kΩ
Resistance Between INDIF- and
OUT
R
INDIF-
,
R
OUT
26 kΩ
Resistance Between OUT2 and
INDIF+
R
OUT2
,
R
INDIF+
26 kΩ
Resistance Between INDIF+ and
OFFSET
R
INDIF+,
R
OFFSET
26 kΩ
Gain = 1 0
Gain = 2 15
Gain = 4 22
Resistance Between OUT1 and
FB1
R
OUT1
,
R
FB1
Gain = 8 26
kΩ
MAX5426
Precision Resistor Network for
Programmable Instrumentation Amplifiers
_______________________________________________________________________________________ 3
Note 1: Total error when configured as instrumentation amplifier. Assumes ideal op amps.
Note 2: Each stage (input stage and output stage) is tested for accuracy separately and combined to give the total gain accuracy.
The input stage is tested as follows: OUT1 = 10V, OUT2 = 0. Output stage is tested as follows OUT1 = 10V, OUT2 = 0 and
OUT2 = 10V, OFFSET = 0.
Note 3: Gain of 1 configuration is open circuit (infinite impedance).
Note 4: Equivalent load at each pin is calculated according to instrumentation amplifier configuration and assumes ideal op amps.
Note 5: See Timing Diagram.
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +15V, V
SS
= -15V, GND = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Gain = 2 29
Gain = 4 15
Resistance Between FB1 and FB2
(Note 3)
R
FB1
,
R
FB2
Gain = 8 7
kΩ
Gain = 1 0
Gain = 2 15
Gain = 4 22
Resistance Between OUT2 and
FB2
R
OUT2
,
R
FB2
Gain = 8 26
kΩ
Input Impedance at FB1 Z
FB1
0kΩ
Input Impedance at FB2 Z
FB2
0kΩ
Gain = 1 0
Gain = 2 9.5
Gain = 4 12
Input Impedance at OUT1
(Note 4)
Z
OUT1
Gain = 8 13
kΩ
Gain = 1 0
Gain = 2 9.5
Gain = 4 12
Input Impedance at OUT2
(Note 4)
Z
OUT2
Gain = 8 13
kΩ
Input Impedance at INDIF+
(Note 4)
Z
INDIF+
0kΩ
Input Impedance at INDIF-
(Note 4)
Z
INDIF-
0kΩ
Input Impedance at OUT (Note 4) Z
OUT
26 kΩ
Input Impedance at OFFSET
(Note 4)
Z
OFFSET
26 kΩ
POWER REQUIREMENTS
Positive Power-Supply Voltage V
DD
4.75 15.75 V
Negative Power-Supply Voltage V
SS
-15.75 -4.75 V
D1 = D0 = 0 10
Positive Supply Current I
DD
D1 = D0 = 5V 36 80
µA
Negative Supply Current I
SS
0.01 10 µA
TIMING REQUIREMENTS
Switching Time (Note 5) t
SWITCHING
(Figure 3) 60 ns
P1-P3P4-P6P7-P9

MAX5426AEUD+T

Mfr. #:
Buy MAX5426AEUD+T
Manufacturer:
Maxim Integrated
Description:
Instrumentation Amplifiers Prec Resistor Net for Prog Inst Amp
Lifecycle:
New from this manufacturer.
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