MT9M001C12STM-EVAL Micron Technology Inc, MT9M001C12STM-EVAL Datasheet - Page 21

• Manufacturer Part Number: MT9M001C12STM-EVAL
• Manufacturer: Micron Technology Inc

Specifications of MT9M001C12STM-EVAL

• Lead Free Status / Rohs Status: Compliant

Feature Description
Signal Path
Programmable Gain Stage
Figure 10: Signal Path
Table 8:
PDF: 09005aef81c2856f/Source: 09005aef80a3e031
MT9M001_DS_2.fm - Rev. F 5/06 EN
Nominal Gain
4.25 to 8.00
1 to 4.000
Recommended Gain Settings at 48 MHz
9 to 15
The MT9M001 signal path consists of two stages, a programmable gain stage and a
programmable analog offset stage.
A total programmable gain of 15 is available and can be calculated using the following
formula:
For gain higher than eight, the user would need to set bit[6:5] = 11 and use the lower 3
LSB's bit[2:0] to set the higher gain values. The formula for obtaining gain greater than
eight is as follows:
For example, for total gain = 12, the value to program is bit[6–0] = 1100100.
The maximum total gain = 15, i.e. bit[6:0] = 1100111.
The gain circuitry in the MT9M001 is designed to offer signal gains from one to 15. The
minimum gain of one corresponds to the lowest setting where the pixel signal is guaran-
teed to saturate the ADC under all specified operating conditions. Any reduction of the
gain below this value may cause the sensor to saturate at ADC output values less than
the maximum, under certain conditions. It is recommended that this guideline be
followed at all times.
Since bit[6] of the gain registers are multiplicative factors for the gain settings, there are
alternative ways of achieving certain gains. Some settings offer superior noise perfor-
mance to others, despite the same overall gain. Recommended gain settings are listed in
Table 8.
Pixel Output
minus reset)
Gain 1 to 8: Gain = (bit[6] + 1) x (bit[5:0] x 0.125)
Total gain = 8 + bit[2:0]
(signal
(Reg0x2B - 0x2E)
Gain Selection
Increments
X
(signed lower 9 bits) x 2mV
Offset Correction Voltage
(Reg0x60, Reg0x61,
0.125
Reg0x63, Reg0x64)
0.25
1.0
MT9M001: 1/2-Inch Megapixel Digital Image Sensor
+
21
10-bit ADC
Recommended Settings
Micron Technology, Inc., reserves the right to change products or specifications without notice.
0x08 to 0x20
0x51 to 0x60
0x61 to 0x67
ADC Data
(9:0)
©2004 Micron Technology, Inc. All rights reserved.
Feature Description