Rainbow Electronics MAX4039 - Manual (Page 10)

MAX4036–MAX4039
Low I
BIAS
, +1.4V/800nA, Rail-to-Rail Op Amps
with +1.2V Buffered Reference
10 ______________________________________________________________________________________
Detailed Description
The MAX4036–MAX4039 consume an ultra-low supply
current and have rail-to-rail output stages specifically
designed for low-voltage operation. The input common-
mode voltage range extends from V
DD - 0.4V to V SS ,
although full rail-to-rail input range is possible with
degraded performance when operating from a supply
voltage above 3.0V. The input offset voltage is typically
200µV. Low-operating supply voltage, low supply current,
and rail-to-rail outputs make the MAX4036–MAX4039 an
excellent choice for precision or general-purpose low-
voltage, battery-powered systems.
Rail-to-Rail Outputs
The MAX4036–MAX4039 output stages can drive a 5kΩ
load and still swing to within 40mV of the rails. Figure 1
shows the output voltage swing of the MAX4036–
MAX4039 configured as a unity-gain buffer, powered
from a single 2.4V supply. The output for this setup typi-
cally swings from 5mV to V
DD - 5mV with a 100kΩ load.
Pin Description
PIN
MAX4036 MAX4037 MAX4038 MAX4039
NAME FUNCTION
1 3 — — IN+ Noninverting Amplifier Input
2 2 4 5 V SS Negative Power-Supply Voltage
3 4 — — IN- Inverting Amplifier Input
4 1 — — OUT Amplifier Output
5 6 8 10 V DD Positive Power-Supply Voltage
— 5 — 6 REF Reference Voltage Output
— — 1 1 OUTA Amplifier Output (Channel A)
— — 2 2 INA- Inverting Amplifier Input (Channel A)
— — 3 3 INA+ Noninverting Amplifier Input (Channel A)
— — 5 7 INB+ Noninverting Amplifier Input (Channel B)
— — 6 8 INB- Inverting Amplifier Input (Channel B)
— — 7 9 OUTB Amplifier Output (Channel B)
— — — 4 N.C. No Connection. Not internally connected.
— — — —
EP
(TDFN only)
Exposed Paddle. Solder EP to V SS or leave unconnected
(TDFN packages only).
2ms/div
1V/div
V IN_+ 1.5V
1.5V V OUT+
A V = 1V/V
Figure 1. Rail-to-Rail Input/Output Voltage Range