6138C Datasheet PDF - Maxim Integrated Products
| Part Number | 6138C | |
| Description | MAX6138C | |
| Manufacturers | Maxim Integrated Products | |
| Logo |  |
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19-2090; Rev 2; 4/04
www.DataSheet4U.com
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
General Description
The MAX6138 is a precision, two-terminal shunt mode,
bandgap voltage reference available in fixed reverse
breakdown voltages of 1.2205V, 2.048V, 2.5V, 3.0V,
3.3V, 4.096V, and 5.0V. Ideal for space-critical applica-
tions, the MAX6138 is offered in the subminiature 3-pin
SC70 surface-mount package (1.8mm X 1.8mm), 50%
smaller than comparable devices in SOT23 surface-
mount packages.
Laser-trimmed resistors ensure precise initial accuracy.
With a 25ppm/°C temperature coefficient, the device is
offered in three grades of initial accuracy ranging from
0.1% to 0.5%. The MAX6138 has a 60µA to 15mA shunt-
current capability with low-dynamic impedance, ensuring
stable reverse breakdown voltage accuracy over a wide
range of operating temperatures and currents.
The MAX6138 does not require an external stabilizing
capacitor while ensuring stability with capacitive loads.
The MAX6138 is a higher precision device in a smaller
package than the LM4040/LM4050.
Applications
Portable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Control
Features
o Ultra-Small 3-Pin SC70 Package
o 0.1% (max) Initial Accuracy
o 25ppm/°C (max) Temperature Coefficient
Guaranteed Over -40°C to +85°C Temperature
Range
o Wide Operating Current Range: 60µA to 15mA
o Low 28µVRMS Output Noise (10Hz to 10kHz)
o 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V
Fixed Reverse Breakdown Voltages
o No Output Capacitors Required
o Stable with Capacitive Loads
Selector Guide
PART
TEMP
RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
(V)
MAX6138_EXR12-T -40°C to +85°C 3 SC70-3 1.2205
MAX6138_EXR21-T -40°C to +85°C 3 SC70-3 2.0480
MAX6138_EXR25-T -40°C to +85°C 3 SC70-3 2.5000
MAX6138_EXR30-T -40°C to +85°C 3 SC70-3 3.0000
MAX6138_EXR33-T -40°C to +85°C 3 SC70-3 3.3000
MAX6138_EXR41-T -40°C to +85°C 3 SC70-3 4.0960
MAX6138_EXR50-T -40°C to +85°C 3 SC70-3 5.0000
Ordering Information appears at end of data sheet.
Typical Operating Circuit
Pin Configuration
VS
TOP VIEW
+1
MAX6138 3 N.C.*
-2
SC70
*PIN 3 MUST BE LEFT FLOATING
OR CONNECTED TO PIN 2.
RS
ISHUNT
ISHUNT + ILOAD
ILOAD
VR
MAX6138
________________________________________________________________ Maxim Integrated Products 1
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.
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0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ELECTRICAL CHARACTERISTICS—MAX6138_41 (4.096V)
(IR = 100µA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Reverse Breakdown
Voltage (Note 2)
SYMBOL
VR
CONDITIONS
MAX6138A (0.1%)
TA = +25°C
MAX6138B (0.2%)
MAX6138C (0.5%)
MIN
4.0919
4.0878
4.0755
TYP
4.0960
4.0960
4.0960
Minimum Operating
Current
IRMIN
50
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
TC
4
Reverse Breakdown
Voltage Change with
Operating Current Change
Reverse Dynamic
Impedance (Note 3)
Wideband Noise
Reverse Breakdown
Voltage Long-Term
Stability
∆VR/∆IR
ZR
eN
IRMIN ≤ IR ≤ 1mA
1mA ≤ IR ≤ 15mA
IR = 1mA, f = 120Hz, IAC = 0.1IR
10Hz ≤ f ≤ 10kHz
∆VR t = 1000h
0.5
3.0
0.5
64
120
MAX
4.1001
4.1042
4.1165
73
25
1.2
10.0
1.0
UNITS
V
µA
ppm/°C
mV
Ω
µVRMS
ppm
ELECTRICAL CHARACTERISTICS—MAX6138_50 (5.0V)
(IR = 100µA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Reverse Breakdown
Voltage (Note 2)
Minimum Operating Current
SYMBOL
VR
IRMIN
CONDITIONS
MAX6138A (0.1%)
TA = +25°C
MAX6138B (0.2%)
MAX6138C (0.5%)
MIN
4.9950
4.9900
4.9750
TYP
5.0000
5.0000
5.0000
54
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
TC
4
MAX
5.0050
5.0100
5.0250
80
UNITS
V
µA
25 ppm/°C
Reverse Breakdown
Voltage Change with
Operating Current Change
∆VR/∆IR
IRMIN ≤ IR ≤ 1mA
1mA ≤ IR ≤ 15mA
0.5 1.4
mV
3.5 12.0
Reverse Dynamic
Impedance (Note 3)
ZR IR = 1mA, f = 120Hz, IAC = 0.1IR
0.5 1.1
Ω
Wideband Noise
eN 10Hz ≤ f ≤ 10kHz
80 µVRMS
Reverse Breakdown
Voltage Long-Term Stability
∆VR t = 1000h
120 ppm
Note 1: All devices are 100% production tested at +25°C and are guaranteed by correlation for TA = TMAX to TMIN, as specified.
Note 2: TC is measured by the “box” method, i.e. (VMAX - VMIN) / (TMAX - TMIN)
Note 3: Guaranteed by design.
_______________________________________________________________________________________ 5
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| Information | Total 13 Pages | |
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