VV6501 datasheet(34/44 Pages) STMICROELECTRONICS

34 / 44 page

Detailed Chipset Specifications

STV0681

34/44

ADCS 7283313C

7.8

Typical current consumption of complete camera

The following data assumes that the camera has been built according to reference design referred

to in

Chapter 10. Figures are approximate and depend on actual components sources - see notes.

The sensor operates at @ 3.3V DC

Note: 1 See Table 9 from Section 7.3

2 From limited evaluation, typical self-refresh current figures of certain SDRAM chips are well below

manufacturers’ maximum specification, e.g. 100-250

µA.

3 Option included in reference design to save current consumption, which can increase battery life

and increase chances of meeting USB suspend mode compliance requirements.

Table 14: Current consumption, complete STV0681+VV6411/6501 camera

Mode

Typical

Comments

’Snapshot’/Continuous/

Self timer mode

(while un-tethered)

60mA

Assuming appropriate hardware included, power is sourced

from PC while USB connected.

’Snapshot’/Continuous/

Self timer mode

(while tethered to PC)

60mA

While playing back audio

sounds through speaker

90mA

Assuming 8

Ω speaker as explained in application note

AN1310

Standby mode

(when NOT connected to

USB)

Approx. 270µA + SDRAM

self-refresh current

(see

Note 2) + sensor

suspend mode current

Total current in this mode equals:

STV0681 standby current consumption (see

Note 1)

+ SDRAM self-refresh current (see

Note 2)

+ peripheral circuitry (approx. 50

µA).

+ Sensor suspend mode current

PC Suspend mode

(when connected to USB):

Sensor SUSPEND pin

asserted

Approx. 300µA + SDRAM

self-refresh current

(see

Note 2) + sensor

suspend mode current

Total current in this mode equals:

STV0681 Standby current consumption (see

Note 1)

+SDRAM self-refresh current (see

Note 2)

+ peripheral circuitry (approx. 50

µA)

+ 200

µA, based on 1.5k pull-up in camera and 15k pull-

down in PC.

+ Sensor suspend mode current

Standby mode

(when not connected to

USB): sensor powered off

using FET (see

Note 3)

Approx. 270µA + SDRAM

self-refresh current

(see

Note 2)

Total current in this mode equals:

STV0681 Standby current consumption (see

Note 1)

+SDRAM self-refresh current (see

Note 2)

+ peripheral circuitry (approx. 50

µA).

PC Suspend mode

(when connected to USB):

sensor powered off using

FET (see

Note 3)

Approx. 100µA + SDRAM

self-refresh current

(see

Note 2)

Total current in this mode equals:

STV0681 Standby current consumption (see

Note 1)

+SDRAM self-refresh current (see

Note 2)

+ peripheral circuitry (approx. 50

µA).

VV6501 Datasheet(PDF) 34 Page - STMicroelectronics

VV6501 Datasheet(HTML) 34 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Datasheet Download

Link URL