Seiko 5M84A - Technical Guide - Circuit Block Current Measurement; Measuring Circuit Block Current Consumption

Cal. 5M84A
17/21
TECHNICAL GUIDE
How to measure the current consumption for the CIRCUIT BLOCK alone
[Structure of the CIRCUIT BLOCK]
Coil output terminal
Crystal unit
Input terminal ( - )
C-MOS-IC
Input terminal (+)
Automatic generating
input terminal
1. To measure the current consumption for the CIRCUIT BLOCKalone,connecteachprobetothe
appropriate positive (+) or negative (-) input terminal of the CIRCUIT BLOCK (please refer to
“Structureofthecircuitblock”below).
* When measuring the current consumption using
the SEIKO digital multi-tester (S- 860), use the
range of 40 μ A of SUPPLY V (= 1.55 V) &
GATE TIME (2 S)
2. InordertoturnthemodeoftheC-MOS-ICintothenormalhandmovementmode,short-circuit
itbytouching“A”portionandtheinputterminal(-)withtweezersformorethanthreeseconds.
* When measuring the current consumption for the CIRCUIT BLOCK alone, be careful not to damage
or deform the pattern of the CIRCUIT BLOCK.
3. Read the measurement when a stable measurement is obtained.
4. Makesurethereadvalueislessthan0.20 μA.