Digital Camera IC
AN2104NFHQ
Digital Pre-Processing IC for Digital Cameras
■ Overview
Unit : mm
9.00±0.40
7.00±0.20
36
25
24
(0.75)
7.00±0.20
9.00±0.40
37
0.50
12
+0.10
0.20−0.05
■ Features
• Low power (114 mW typ. at 3 V supply voltage)
• High-speed sample-and-hold circuit operates up to 25 MHz.
• The AGC can be adjusted over 0.5 dB to 36 dB range.
• The OB circuit is adjustable over a {VRB to VRB+(VRT −VRB)/
4} range.
• On-chip A/D converter reference voltage supply circuit (VRT
and VRB)
• On-chip 10-bit A/D converter (maximum conversion speed:
25 MSPS)
• Built-in 3-channel 8-bit D/A converter for adjustments and
mode settings.
SEATING PLANE
+0.10
1
0.15−0.05
(0.75)
13
(0.625)
1.40±0.10
1.70 max.
48
(0.625)
0.10±0.10
The AN2104NFHQ is a digital pre-processing IC for CCD
digital cameras. It is a single chip IC including a 10-bit A/D
converter as well as CDS and AGC circuits. The CDS circuit
achieves high-speed sampling at rates up to 25 MHz, and thus
the AN2104NFHQ can support advanced CCD cameras developing in higher density pixels and image quality, such as XGA
or SXGA resolutions. The AGC and OB circuits can be adjusted with 9-bit and 8-bit serial data respectively through onchip D/A converter.
(1.00)
0 to 10°
0.50±0.20
LQFP048-P-0707
■ Applications
• Digital still cameras
• Video cameras
• PC input cameras
• Surveillance cameras
• Board cameras
• Cameras that use CCDs and digital signal processing.
1
AN2104NFHQ
Digital Camera IC
25
VAGC out
26
27
28
AVSS
CPOB
29
AVDD
30
AVDD
31
DS2
32
DS1
33
DS mode
34
from CCD out
35
36
from CCD out
■ Block Diagram
24
AVSS 37
38
clamp
AVSS 39
clamp
LD
SDATA
SCK
AVDD
S/H
GC
amp.
VREFH
S/H
VREFL
DC
cont.
40
42
19
18
EVR DAC
17
44
45
10-bit ADC
14
13
12
DVDD
11
D9
10
D8
9
D7
8
D6
7
D5
5
D3
4
D2
3
D1
D0
2
48
1
2
AVSS
ADIN
VRB
VRM
VRT
15
47
NOE
16
46
6
DVDD
AD-amp.
mode
(CH3−D2)
POWD
(CH3−D0)
D4
DVSS
22
20
AD-amp.
43
23
21 AV
DD
Test
OB
mode
AGC cont. cont. (CH3
(CH0, 1)
(CH2) −D1)
41
CPOB mode
ADCLK
DVSS
Digital Camera IC
AN2104NFHQ
■ Pin Descriptions
Pin No.
Description
Pin No.
Description
1
Unused (Must be connected to ground.)
25
Output OB level stabilization
2
A/D converter output D0
26
AGC output in test mode
3
A/D converter output D1
27
Analog system ground 2
4
A/D converter output D2
28
Input DC level stabilization
5
A/D converter output D3
29
CPOB pulse input
6
A/D converter output D4
30
Analog system power supply 2
7
A/D converter output D5
31
Analog system power supply 3
8
A/D converter output D6
32
DS2 pulse input
9
A/D converter output D7
33
DS1 pulse input
10
A/D converter output D8
34
DS1 and DS2 pulse. Active high/active low setting
11
A/D converter output D9
35
CCD output signal input 1
12
Digital system power supply 1
36
CCD output signal input 2
13
Digital system ground 1
37
Analog system ground 3
14
A/D converter clock input
38
Unused (Must be connected to ground.)
15
Unused (Must be connected to ground.)
39
Analog system ground 4
16
A/D converter reference supply VRT input
40
Load pulse input
17
A/D converter reference supply VRM
41
Serial data input
18
A/D converter reference supply VRB input
42
Serial clock input
19
AGC input in test mode
43
Analog system power supply 4
20
Analog system ground 1
44
Unused (Must be connected to ground.)
21
Analog system power supply 1
45
Digital system ground 2
22
Reference voltage supply VREFL output (1.1 V typical)
46
Digital system power supply 2
23
Reference voltage supply VREFH output (2.5 V typical)
47
Unused (Must be connected to ground.)
24
CPOB pulse. Active high/active low setting
48
A/D converter output enable setting
■ Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Supply voltage
VDD
− 0.3 to +4.6
V
Supply current
IDD
mA
Power dissipation *2
PD
226
mW
Operating temperature *1
Topr
−20 to +75
°C
Storage temperature *1
Tstg
−55 to +125
°C
Notes: *1 : Except for the operating temperature and storage temperature, all items are measured at Ta = 25 °C.
*2 : The power dissipation is for the package at Ta = 75 °C in free air.
3
AN2104NFHQ
Digital Camera IC
■ Recommended Operating Range
Parameter
Supply voltage
Symbol
Range
Unit
VCC
2.7 to 3.0 to 3.6
V
■ Electrical Characteristics at AVDD = DVDD = 3.0 V, Ta = 25 °C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Supply current (in CDS mode)
IDD1
AVDD = DVDD = 3.0 V, fCLK = 25 MHz
38
51
mA
Supply current (in AD amplifier mode)
IDD2
AVDD = DVDD = 3.0 V, fCLK = 25 MHz
24
39
mA
Low power mode supply current
IPOWD
fCLK = 25 MHz
5.0
16
mA
Reference voltage (1)
VREFH
AVDD = DVDD = 3.0 V
2.3
2.5
2.7
V
Reference voltage (2)
VREFL
AVDD = DVDD = 3.0 V
0.8
1.0
1.2
V
CPOB pulse input voltage
high level
CPOBH
2.4
VDD
V
CPOB pulse input voltage
low level
CPOBL
VSS
0.8
V
DS1 pulse input voltage
high level
DS1H
2.4
VDD
V
DS1 pulse input voltage
low level
DS1L
VSS
0.8
V
DS2 pulse input voltage
high level
DS2H
2.4
VDD
V
DS2 pulse input voltage
low level
DS2L
VSS
0.8
V
10 MHz, with upper blanking,
sine wave, 300 mV[p-p]
−2.9
− 0.4
2.1
dB
AGC frequency characteristics
GfA
AGC input dynamic range
GAG3
With upper BLK, sine wave, 600 mV[p-p]
−1.8
0
1.8
dB
Minimum AGC gain
GAG4
With upper BLK, sine wave, 300 mV[p-p]
−2.0
0.5
3.0
dB
Maximum AGC gain
GAG5
With upper BLK, sine wave, 20 mV[p-p]
32.0
36.0
40.0
dB
AGC output dynamic range
VAG6
With upper BLK, sine wave, 50 mV[p-p]
1350
1700
mV[p-p]
AGC output DC (1)
VOFF1
CH2 = 00, the difference with respect to VREF
−70
0
70
mV
AGC output DC (2)
VOFF2
CH2 = FF, the difference with
−70
0
70
mV
−2.0
0
2.0
dB
respect to (VREFH - VREFL)/4
4
DS1 = DS2 = 25 MHz
CDS input: 300 mV[p-p]
CDS sampling capability
GCDS
Reference resistor (VRB to VRT)
RREF
278
570
950
Ω
AD-amplifier maximum gain
GAA1
3.58 MHz sine wave, 300 mV[p-p]
5.0
dB
AD-amplifier minimum gain
GAA2
3.58 MHz sine wave, 300 mV[p-p]
−2.0
dB
Digital Camera IC
AN2104NFHQ
■ Electrical Characteristics (continued) at AVDD = DVDD = 3.0 V, Ta = 25 °C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Digital input current (high)
IDINH
CLK and POWD pins
Pin19 = 0.8 × VDD
45
µA
Digital input current (low)
IDINL
CLK and POWD pins
Pin19 = 0.2 × VDD
45
µA
Analog input current (high)
IAIH
Pin19 = 3.0 V
200
µA
Analog input current (low)
IAIL
Pin19 = 0.5 V
−200
µA
High-level digital input current
VIH
2.4
VDD
V
Low-level digital input current
VIL
VSS
0.8
V
High-level digital output current
IOH
VOH = 0.8 × VDD
−1.5
mA
Low-level digital output current
IOL
VOL = − 0.2 × VDD
1.5
mA
Differential linearity error
ED
± 0.5
±1.0
LSB
Dynamic linearity error
Quantization noise
*1
DEL
fCLK = 25 MHz, fIN = 12.5 MHz
±13
LSB
S/N
fCLK = 20 MHz, fIN = 3.58 MHz
42
47
dB
Min
Typ
Max
Unit
Note: *1. Including the total harmonic distortion.
• Design Reference Data
Note: The characteristics shown below are design reference values, and are not guaranteed.
Parameter
Symbol
Maximum conversion rate
FCMAX
Reference voltage difference
VDELTA
Conditions
AVDD = DVDD = 3.0 V
25
MSPS
1.38
1.48
1.58
V
5
AN2104NFHQ
Digital Camera IC
■ Terminal Equivalent Circuits
Pin No.
1
Equivalent circuit
N.C. (Ground to analog system ground)
DVDD
Pin 1, 44, 47
2 to 11
DVSS
Pin 12
D0 to D9
DVDD
12
13
Pin 12 : DVDD
14
15
Pin 14 : ADCLK
Pin 15 : N.C. (Ground to analog system ground)
DVSS
Pin 12
Pin 2 ∼ 11
Pin 13
Pin 13 : DVSS
DVDD
Pin 14, 15
16
17
Pin 13
DVSS
Pin 12
Pin 13
AVDD
AVSS
VRT, VRM, VRB
18
16
VRT
Pin 21
17 V
RM
18
VRB
6
Pin 20
Digital Camera IC
AN2104NFHQ
■ Pin Equivalent Circuits (continued)
Pin No.
19
Equivalent circuit
ADIN
AVDD
ADIN 19
20
21
22
23
Pin 20 : AVSS
Pin 21
AVSS
Pin 20
Pin 21 : AVDD
Pin 22 : VREFL
Pin 23 : VREFH
AVDD
Pin 30
AVSS
Pin 27
Pin 22, 23
24
CPOB mode
AVDD
24
Pin 30
25
Pin 27
VOBDAT
AVDD
Pin 25, 28
Pin 30
26
AVSS
AVSS
Pin 27
VAGC out
AVDD
26
Pin 30
AVSS
Pin 27
7
AN2104NFHQ
Digital Camera IC
■ Pin Equivalent Circuits (continued)
Pin No.
Equivalent circuit
27
Analog ground
28
VCLIPDAT
See pin 25
29
CPOB
AVDD
29
30
AVDD (analog system power supply 2)
31
AVDD (analog system power supply 3)
32
33
Pin 32 : DS2
Pin 33 : DS1
Pin 32, 33
Pin 30
AVDD
Pin 31
AVSS
Pin 27
AVSS
Pin 37
34
DS mode
AVDD
34
35
36
Pin 35 : SIGIN1
Pin 36 : SIGIN2
Pin 35, 36
37
38
Pin 31
AVDD
Pin 31
AVSS
Pin 37
Unused (Must be connected to ground.)
38
8
Pin 37
Analog ground3
AVDD
39
AVSS
Analog ground 4
Pin 43
AVSS
Pin 39
Digital Camera IC
AN2104NFHQ
■ Pin Equivalent Circuits (continued)
Pin No.
40
41
42
Equivalent circuit
Pin 40 : LD
Pin 41 : SDATA
Pin 42 : SCK
Pin 40, 41, 42
43
Analog system power supply 4
44
Unused (Must be connected to ground.)
45
Digital system ground 2
46
Digital system power supply 2
47
Unused (Must be connected to ground.)
48
AVDD
Pin 43
AVSS
Pin 39
NOE
DVDD
48
Pin 12
DVSS
Pin 13
9
AN2104NFHQ
Digital Camera IC
25
VAGC out
26
27
28
AVSS
CPOB
29
AVDD
30
AVDD
31
DS2
32
DS1
33
34 DS mode
35
36
CCD out
■ Application Circuit Example
37
24 CPOB mode
38
23
AVSS
39
22
LD
40
21
SDATA
41
20
SCK
42
19 ADIN *
43
18
44
17
45
16
46
15
47
14
ADCLK
NOE 48
13
DVSS
AVSS
AVDD
AVSS
VRB
VRM
12
DVDD
11
D9
10
D8
9
D7
8
D6
7
D5
6
D4
5
D3
4
D2
3
D1
D0
1
VRT
2
DVSS
DVDD
AVDD
Note *: When the AD amplifier is used, signals should be input to pin 19 through a capacitor. (Assumed chrominance signal may
be input.)
■ Usage Notes
The unused pins (pins 1, 15, 38, 44, and 47) are connected internally to the circuit shown in the "Pin Equivalent
Circuits" table. Therefore, these pins must be held fixed at either VSS or VDD.
10
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2001 MAR