Datasheet
IRST
SHR
SHS
TFT Switch on
Compensation
charge
C1 charge injection
= (V at Pins 56,57 –
Voltage at ‘ECT_C’)*
0.857pC
DF-SM
INTG
REFP
REFM
Hole counting
Vint off
Electron counting
Reset sample Signal sample
Integrator output
( internal)
For Integration
down mode
+ve charge
(Integrator down)
-ve charge
(Integrator up)
REFP
REFM
Vint_off
Device allows integration
with both polarity
Reset sample Signal sample
Integrator output
( internal)
For Integration up
mode
Electron counting
Hole counting
AFE0064
www.ti.com
........................................................................................................................................................................................ SLAS672 –SEPTEMBER 2009
Figure 10. Handling Bipolar Charge Range Using Charge Injection Scheme
Note the relation between the integrator output and AFE0064 output ( OUTP and OUTM) described in the Data
Read section.
Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Link(s) :AFE0064