Rainbow Electronics TH7841A User Manual

212.68 Kb
Loading...

Features

 

 

 

 

 

Pixel Size: 11 µm x 13 µm (13 µm Pitch)

 

 

 

High Data Output Rate: 20 MHz

 

 

 

 

High Responsivity and Resolution Over a Wide Spectral Range: from Blue (400 nm) up

 

to Near Infrared (1,100 nm)

 

 

 

 

Low Dark Signal and Improved Uniformity

 

 

 

Low Temporal Noise and High Dynamic Range: Over 6000/1

 

Ease and Flexibility of Operation:

 

 

 

 

 

– Only Two External Basic Drive Clocks

 

 

 

– Choice of Internal or External Sampling and Reset

Linear CCD

28-lead DIL Package

 

 

 

 

Available with Standard Window or Antireflective Window in the Bandwidth 450 to

Image Sensor

 

750 nm

 

 

 

 

 

 

 

 

 

 

Pin Identification

 

 

 

 

(2048 Pixels)

 

Pin Number

Symbol

Designation

 

 

 

 

 

2

VOSA

Video Output Signal A (Odd Channel)

TH7841A

 

3

ΦECHA

A Sample-and-hold Gate Input Channel

 

 

 

4

ECHA

A Internal Sampling Clock Output Channel

 

 

5

ΦRA

A External Reset Clock Input Channel

 

 

9

VDD

Output Amplifier Drain And Internal Logic Supply

 

 

10

TP3

Test Point 3

 

 

 

11

TP2

Test Point 2

 

 

 

12

VT

Register and Photosensitive Zone DC Bias

 

 

13

TP1

Test Point 1

 

 

 

14, 15, 28

VSS

Substrate Bias (Ground)

 

 

16

VINH

Internal Sampling Clock Inhibiting Input (Dc Bias)

 

 

18

ΦP

Transfer Clock

 

 

19

ΦT

Register Transport Clock

 

 

20

VGS

Output Gate DC Bias

 

 

21

ΦRB

B External Reset Clock Output Channel

 

 

24

ECHB

B Internal Sampling Clock Output Channel

 

 

25

ΦECHB

B Sample-and-hold Gate Input Channel

 

 

26

VOSB

Video Output Signal B (Even Channel)

 

 

27

VDR

Reset DC Bias

 

 

1, 6, 7, 8, 17, 22, 23

DNC

Do not Connect

 

 

 

DNC

1

28

VSS

 

 

 

VOSA

2

27

VDR

 

 

 

ΦECHA

3

26

VOSB

 

 

 

SΦECHA

4

25

ΦECHB

 

 

 

ΦRA

5

24

SΦECHB

 

 

 

DNC

6

23

DNC

 

 

 

DNC

7

22

DNC

 

 

 

DNC

8

21

ΦRB

 

 

 

VDD

9

20

VGS

 

 

 

TP3

10

19

ΦT

 

 

 

TP2

11

18

ΦP

 

 

 

VT

12

17

DNC

 

 

 

TP1

13

16

VINH

Rev. 1998A–IMAGE–05/02

 

 

VSS

14

15

VSS

 

 

 

 

 

 

1

T

Absolute Maximum Ratings*

.....................................Storage Temperature

-55°C to +150°C

*NOTICE: Stresses above those listed under ABSOLUTE

 

 

MAXIMUM RATINGS may cause permanent

Operating Temperature........................................

0°C to +70°C

device failure. Functionality at or above these

 

 

limits is not implied. Exposure to absolute maxi-

Thermal Cycling..........................................................

15°C/mn

mum ratings for extended periods may affect

Maximum Voltages:

 

device reliability.

 

 

• Pins: 3, 5, 9, 10, 11, 13,

 

 

16, 19, 20, 21, 25, 27........................................

-0.3V to +18V

 

• Pins: 12. 18 ......................................................

-0.3V to +16V

 

• Pins: 14, 15, 28 .................................................................

0V

 

 

 

 

Operating Range

Operating

Precautions

Operating range defines the temperature limits between which the functionality is guaranteed: 0°C to 70°C.

Shorting the video output to VSS to VDD, even temporarily, can permanently damage the output amplifier.

2 TH7841A

1998A–IMAGE–05/02

 

 

 

 

 

 

 

 

 

 

TH7841A

 

 

 

 

 

 

 

 

 

 

Operating Conditions (T = 25°C)

 

 

 

 

 

 

 

 

 

 

Table 1. DC Characteristics

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Values

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

 

Symbol

 

Min

Typ

Max

Unit

 

Note

 

 

 

 

 

 

 

 

 

 

Output Amplifier Drain Supply

 

VDD

 

14

15

16

V

 

 

Reset DC Bias

 

VDR

 

12

13

14.5

V

 

(1)

 

 

 

 

Output Gate DC Bias

 

VGS

 

5.5

6

6.5

V

 

 

Photosensitive Zone and

 

VT

 

6

6.5

7

V

 

(2)

Register DC Bias

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Substrate Bias

 

VSS

 

0.0

0.0

 

 

 

 

Test Point 1

 

TP1

 

 

VDD

 

V

 

(3)

 

 

 

 

 

 

Test Points 2 and 3

 

TP2, TP3

 

 

VSS

 

V

 

(3)

 

 

 

 

 

 

Notes: 1. It is recommended to maintain VDR at VDD - 2V.

 

 

 

 

 

 

2. VT nominal =

 

 

 

 

 

 

 

 

 

 

(VΦT )high + (VΦT)low

± 5%

 

 

 

 

 

 

 

 

-----------------------------------------------------------

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

3. No use for operation – For testing purpose only.

Basic Internal

Configuration

ECHA and ΦRA

internal to TH7841A

ECHB and ΦRB

Table 2. Selection of Nominal Mode

Option

Implementation

Note

 

 

 

 

VINH (16) Connected to VSS

 

Internal Sampling

ECHA (4) and ΦECHA (3) Strapped

(1)

 

 

ECHB (24) and ΦECHB (25) Strapped

 

Internal Reset

ΦRA (5) and ΦRB (21) Connected to VDD

 

 

 

 

Note: 1. Make the straps as short as possible to avoid any parasitic coupling to these connections. The load capacitance introduced by the strap should not exceed 5 pF.

3

1998A–IMAGE–05/02

Figure 1. Timing Diagram — Clocks and Video Output Timing Diagram in Internal Sampling Mode

Table 3. Drive Clock Characteristics (see Figure 1)

 

 

 

 

 

Values

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

Symbol

Logic

Min

Typ

Max

Unit

Note

 

 

 

 

 

 

 

 

 

Transfer Clock

 

High

12

13

14

V

(1)

ΦPΦT

 

 

 

 

 

 

 

 

 

Register Transport Clock

Low

0.0

0.4

0.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Register Transport Clock

T

 

 

 

800

1200

pF

 

Capacitance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transfer Clock Capacitance

P

 

 

 

200

300

pF

 

 

 

 

 

 

 

 

 

 

Note: 1. Transients under 0.0V in the clock pulses will lead to charge injection, causing a localized increase in the dark signal if such

spurious negative transients are present, they can be suppressed by inserting a serial resistor of appropriate value (typically

20 to 100Ω) in the corresponding driver output.

 

 

 

 

 

4 TH7841A

1998A–IMAGE–05/02

+ 8 hidden pages