TPA8801B
3PEAK
High Sensitivity Current Input Interface
Features
Description
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Ideal DC gain when Rg=20K: 4.56GΩ
One resister(Rg) to set the gain
Supply voltage range: 2.1-5.5V
Iq: 700µA maximum
TPA8801B is a high sensitivity current input interface,
which can covert the pA to nA range current signal to 5V
range output.
TPA8801B use one resister to set the transduce gain,
can provide ideal 4.56GΩ current to voltage DC gain
when the resister is 20KΩ. As the output is saturated in
the real application by offset voltage of internal amplifier,
AC coupled mode is used to remove DC offset voltage
and bias current impaction, so the real AC gain in the
application is less than ideal DC gain depend on the
capacitor values.
Analog output
Internal amplifier:
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VOS: ±3mV maximum
Low noise: 25 nV/√Hz
GBWP: 1.3MHz
Input Bias Current: 1pA typical
The internal precision amplifier has 1pA input bias
current is good to transduce down to 100pA signal,
0.4mV offset voltage to expand the input range for DC
signal, 1.3MHz GBW to meet the requirement of AC
signal which is used in some type of dust sensor
application.
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ESD rating: HBM 8KV / CDM 2KV
Operation temperature range: –40°C to 125°C
Green, Popular Type Package
TPA8801B is specified for operation over the -40°C to
125°C range.
Applications
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Dust sensor for air quality monitoring (PM2.5,
PM10)
TPA8801B is available in 5mm*6mm 14-lead TSSOP
package. TPA8801B possibly in 3mm*2mm 14-lead DFN
package, 1/5 size versus TSSOP-14 package, to meet
the size limitation application, the sample can be
provided in one month.
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Photodiode interface
Sensor interface for current output sensor
Pin Configuration
3PEAK and the 3PEAK logo are registered trademarks of
3PEAK INCORPORATED. All other trademarks are the property of
their respective owners.
TPA8801B
14-Pin TSSOP
(-T Suffixes)
1
2
3
4
5
6
7
14
13
TO
IN-
Out
NR
IN+
12 HPFC
11 VCC
GND
GR2
GR1
TP
SC1
SC2
10
9
8
LPFC
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