10 μA, Rail-to-Rail I/O, Zero Input
Crossover Distortion Amplifiers
ADA4505-1/ADA4505-2/ADA4505-4
FEATURES
PIN CONFIGURATIONS
PSRR: 100 dB minimum
CMRR: 105 dB typical
Very low supply current: 10 μA per amplifier maximum
1.8V to 5V single-supply or 0.9V to 2.5V dual-supply operation
Rail-to-rail input and output
OUT
V–
1
2
3
5
V+
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
ADA4505-1
TOP VIEW
ADA4505-2
TOP VIEW
(Not to Scale)
OUT B
–IN B
+IN B
(Not to Scale)
+IN
4
–IN
3 mV offset voltage maximum
Very low input bias current: 0.5 pA typical
Figure 1. 5-Lead SOT-23 (RJ-5)
Figure 2. 8-Lead MSOP (RM-8)
BALL A1
INDICATOR
APPLICATIONS
BALL A1
CORNER
Pressure and position sensors
Remote security
Medical monitors
Battery-powered consumer equipment
Hazard detectors
OUT
A1
V+
A2
OUT B
A1
V+ OUT A
V–
B1
NC
B2
A2
A3
–IN B
B1
–IN A
B3
+IN
C1
–IN
C2
+IN B
C1
V–
C2
+IN A
C3
GENERAL DESCRIPTION
The ADA4505-1/ADA4505-2/ADA4505-4 are single, dual, and
quad micropower amplifiers featuring rail-to-rail input and output
swings while operating from a single 1.8 V to 5 V power supply
or from dual 0.ꢀ V to 2.5 V power supplies.
ADA4505-1
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
ADA4505-2
TOP VIEW
(BALL SIDE DOWN)
NC = NO CONNECT
Figure 3. 6-Ball WLCSP (CB-6-7)
Figure 4. 8-Ball WLCSP (CB-8-2)
Employing a new circuit technology, these low cost amplifiers
offer zero input crossover distortion (excellent PSRR and CMRR
performance) and very low bias current, while operating with a
supply current of less than 10 μA per amplifier.
BALL A1
INDICATOR
OUT D OUT A
–IN A
A3
A1
A2
–IN D
B1
V–
B2
+IN A
B3
This combination of features makes the ADA4505-x amplifiers
ideal choices for battery-powered applications because they
minimize errors due to power supply voltage variations over the
lifetime of the battery and maintain high CMRR even for a rail-
to-rail op amp.
+IN D
C1
+IN B
C3
1
2
3
4
5
6
7
14
13
12
11
10
9
OUT A
–IN A
+IN A
V+
OUT D
–IN D
+IN D
V–
+IN C
D1
V+
D2
–IN B
D3
ADA4505-4
TOP VIEW
(Not to Scale)
–IN C
E1
OUT C OUT B
E2 E3
Remote battery-powered sensors, handheld instrumentation
and consumer equipment, hazard detectors (for example, smoke,
fire, and gas), and patient monitors can benefit from the features
of the ADA4505-x amplifiers.
+IN B
–IN B
OUT B
+IN C
–IN C
OUT C
ADA4505-4
TOP VIEW
8
(BALL SIDE DOWN)
Not to Scale
The ADA4505-x family is specified for both the industrial
temperature range (−40°C to +85°C) and the extended industrial
temperature range (−40°C to +125°C). The ADA4505-1 single
amplifier is available in a tiny 5-lead SOT-23 and a 6-ball WLCSP.
The ADA4505-2 dual amplifier is available in a standard 8-lead
MSOP and a 8-ball WLCSP. The ADA4505-4 quad amplifier is
available in a 14-lead TSSOP and a 14-ball WLCSP.
Figure 5. 14-Lead TSSOP (RU-14)
Figure 6. 14-Ball WLCSP (CB-14-1)
The ADA4505-x family is a member of a growing series of zero
crossover op amps offered by Analog Devices, Inc., including
the AD8505/AD8506/AD8508, which also operate from a single
1.8 V to 5 V power supply or from dual 0.ꢀ V to 2.5 V power
supplies.
Rev. D
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