MAX6220ASA-5.0+T Maxim Integrated Products, MAX6220ASA-5.0+T Datasheet - Page 8

• Manufacturer Part Number: MAX6220ASA-5.0+T
• Description: IC REF VOLT LOW NOISE 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX6220ASA-5.0+T

• Reference Type: Series
• Voltage - Output: 5V
• Tolerance: ±0.1%
• Temperature Coefficient: 20ppm/°C
• Voltage - Input: 8 ~ 40 V
• Number Of Channels: 1
• Current - Quiescent: 2.9mA
• Current - Output: 15mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Product: Voltage References
• Topology: Series References
• Output Voltage: 5 V
• Initial Accuracy: 0.1 %
• Average Temperature Coefficient (typ): 2 PPM / C
• Series Vref - Input Voltage (max): 42 V
• Shunt Current (max): 15 mA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Cathode: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

_____________________Pin Description
Low-Noise, Precision, +2.5V/+4.096V/+5V
Voltage Reference
The MAX6220 is a highly stable, low-noise voltage ref-
erence that uses a low-power temperature-compensa-
tion scheme to achieve laboratory-standard temper-
ature stability. This produces a nearly flat temperature
curve, yet does not require the power associated with
heated references.
The output voltage can be trimmed 0.6% (min) by con-
necting a 10kΩ potentiometer between OUT and GND,
and connecting its tap to the TRIM pin (Figure 1). The
external trimming does not affect temperature stability.
Figure 1. Output Voltage Adjustment
8
1, 7, 8
PIN
_______________________________________________________________________________________
2
3
4
5
6
NAME
TRIM
GND
OUT
NR
I.C.
NR
IN
8V TO 40V INPUT
MAX6220
Internally Connected. Do not use.
Positive Power-Supply Input
Noise Reduction. Optional capacitor
connection for wideband noise
reduction. Leave open if not used
(Figure 2).
Ground
External Trim Input. Allows ±1%
output adjustment (Figure 1).
Leave open if not used.
Voltage Reference Output
GND
Detailed Description
IN
Temperature Stability
TRIM
OUT
FUNCTION
REFERENCE OUT
10kΩ
To augment wideband noise reduction, add a 1µF
capacitor to the NR pin (Figure 2). Larger values do not
improve noise appreciably (see Typical Operating
Characteristics).
Noise in the power-supply input can affect output
noise, but can be reduced by adding an optional
bypass capacitor to the IN pin and GND.
The MAX6220 is stable with capacitive load values from
0µF to 100µF, for all values of load current. Adding an
output bypass capacitor can help reduce noise and
output glitching caused by load transients.
Figure 3 shows how both a +5V and -5V precision ref-
erence can be obtained from a single unregulated +5V
supply. The MAX865 generates approximately ±9V to
operate both the MAX6220 reference and the MAX480
inverting amplifier. The +5V is inverted by the MAX480.
Resistor R1 is optional, and may be used to trim the
±5V references. R2 and R4 should be matched, both in
absolute resistance and temperature coefficient. R3 is
optional, and is adjusted to set the -5V reference.
Figure 2. Noise-Reduction Capacitor
*OPTIONAL
2.2µF*
1µF
Applications Information
NR
8V TO 40V INPUT
MAX6220
GND
IN
Negative Regulator
Noise Reduction
TRIM
OUT
REFERENCE OUT
Bypassing