MAX6126
Ultra-High-Precision, Ultra-Low-Noise,
Series Voltage Reference
General Description
The MAX6126 is an ultra-low-noise, high-precision, lowdropout voltage reference. This family of voltage references feature curvature-correction circuitry and
high-stability, laser-trimmed, thin-film resistors that
result in 3ppm/°C (max) temperature coefficients and
an excellent ±0.02% (max) initial accuracy. The proprietary low-noise reference architecture produces a low
flicker noise of 1.3µVP-P and wideband noise as low as
60nV/√Hz (2.048V output) without the increased supply
current usually found in low-noise references. Improve
wideband noise to 35nV/√Hz and AC power-supply
rejection by adding a 0.1µF capacitor at the noise
reduction pin. The MAX6126 series mode reference
operates from a wide 2.7V to 12.6V supply voltage
range and load-regulation specifications are guaranteed to be less than 0.025Ω for sink and source currents up to 10mA. These devices are available over the
automotive temperature range of -40°C to +125°C.
The MAX6126 typically draws 380µA of supply current
and is available in 2.048V, 2.500V, 2.800V, 3.000V,
4.096V, and 5.000V output voltages. These devices
also feature dropout voltages as low as 200mV. Unlike
conventional shunt-mode (two-terminal) references that
waste supply current and require an external resistor,
the MAX6126 offers supply current that is virtually independent of supply voltage and does not require an
external resistor. The MAX6126 is stable with 0.1µF to
10µF of load capacitance.
The MAX6126 is available in the tiny 8-pin µMAX®, as
well as 8-pin SO packages.
Features
o Ultra-Low 1.3µVP-P Noise (0.1Hz to 10Hz, 2.048V
Output)
o Ultra-Low 3ppm/°C (max) Temperature Coefficient
o ±0.02% (max) Initial Accuracy
o Wide (VOUT + 200mV) to 12.6V Supply Voltage
Range
o Low 200mV (max) Dropout Voltage
o 380µA Quiescent Supply Current
o 10mA Sink/Source-Current Capability
o Stable with CLOAD = 0.1µF to 10µF
o Low 20ppm/1000hr Long-Term Stability
o 0.025Ω (max) Load Regulation
o 20µV/V (max) Line Regulation
o Force and Sense Outputs for Remote Sensing
Pin Configuration
TOP VIEW
+
NR
1
8
I.C.*
IN
2
7
OUTF
3
6
OUTS
GNDS 4
5
I.C.*
MAX6126
Applications
GND
High-Resolution A/D and D/A Converters
ATE Equipment
High-Accuracy Reference Standard
SO/µMAX
Precision Current Sources
*I.C. = INTERNALLY CONNECTED. DO NOT USE.
Digital Voltmeters
High-Accuracy Industrial and Process Control
µMAX is a registered trademark of Maxim Integrated Products, Inc.
PART
MAX6126AASA21+
TEMP RANGE
PINPACKAGE
Ordering Information
OUTPUT
VOLTAGE
(V)
MAXIMUM INITIAL
ACCURACY (%)
MAXIMUM TEMPCO
(-40°C to +85°C)
(ppm/°C)
-40°C to +125°C
8 SO
2.048
0.02
3
MAX6126BASA21+
-40°C to +125°C
8 SO
2.048
0.06
5
MAX6126A21+
-40°C to +125°C
8 µMAX
2.048
0.06
3
Ordering Information continued at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-2647; Rev 6; 8/12
