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| 型號： | ADL5304ACPZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 29/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP LOG CONV 32LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 對數(shù)轉(zhuǎn)換器 |
| 應(yīng)用： | 光纖 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 32-LFCSP-VQ（5x5） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | ADL5304ACPZ-R7DKR |
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ADL5304
Data Sheet
Rev. 0 | Page 6 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
2. CONNECT EXPOSED PADDLE TO VSM1 THROUGH
VSM4 PINS TO PROVIDE LOW LEAKAGE GUARD.
09
459-
002
PIN 1
INDICATOR
1
NC
2
VSM1
3
VSM2
4
INUM
5
IDEN
6
IREF
7
VSM3
8
VSM4
24 INPS
23 INMS
22 VLOG
21 SCL1
20 SCL2
19 SCL3
18 ACOM
17 2VLT
9
V
D
E
N
10
IN
D
N
11
C
O
M
12
N
M
F
S
13
V
N
E
G
14
D
N
F
S
15
A
C
O
M
16
H
F
C
P
32
V
N
U
M
31
IN
N
M
30
IM
O
N
29
V
P
O
S
28
B
S
D
C
27
D
C
B
I
26
1P
5V
25
N
C
ADL5304
TOP VIEW
(Not to Scale)
Figure 2. 32-Lead LFCSP Pin Configuration
Table 3. Pin Function Descriptions
Pin No.
Mnemonic
Description
1, 25
NC
No Connect. Do not connect to these pins.
2, 3, 7, 8
VSM1 to VSM4
Guard Pins for the INUM and IDEN Inputs. Connect these pins to the 1P5V, DCBI, and INPS pins for default
single-supply setup; connect to ground if INUM (photodiode bias) is desired to be at ground (must have 5 V
< VNEG < 2 V).
4
INUM
Numerator Current Input.
5
IDEN
Denominator Current Input. Connect to the IREF pin for most applications.
6
IREF
100 nA Trimmed Reference Current Output. Connect to the IDEN pin for most applications.
9
VDEN
Voltage Output of Denominator Log Amplifier. Connect this pin to the INDN pin and decouple with an
external 0.1 μF capacitor to ground.
10
INDN
Denominator Voltage Input to Temperature Compensation Circuit.
11
COMM
Main Ground.
12
NMFS
Numerator Speed Bias (Nominal 1 kΩ Resistor to VNEG Pin).
13
VNEG
Negative Supply.
14
DNFS
Denominator Speed Bias (Nominal 1 kΩ Resistor to VNEG Pin).
15, 18
ACOM
Analog Common, Low Noise Reference Ground. Important that both pins are always grounded.
16
HFCP
High Frequency Compensation.
17
2VLT
2.0 V Reference Output.
19
SCL3
7.5 kΩ Scaling Resistor (See Figure 1). Default is NC.
20
SCL2
5 kΩ Scaling Resistor (See Figure 1). Default is to connect to the INMS pin.
21
SCL1
5 kΩ Scaling Resistor (See Figure 1). Default is to connect to the VLOG pin.
22
VLOG
Primary Logarithmic Output. For INUM = IDEN, the VLOG pin is at the voltage applied to the INPS pin.
23
INMS
Output Buffer Amplifier Inverting Input.
24
INPS
Output Buffer Amplifier Noninverting Input. The INPS, DCBI, and VSM1 to VSM4 pins must be tied together.
26
1P5V
1.5 V Reference Output. Connect to the INPS, DCBI, and VSM1 to VSM4 pins for single-supply operation.
27
DCBI
~1.3 mA Bias Current. Connect this pin to the VSM1 to VSM4 pins. See Pin 2, Pin 3, Pin 7, and Pin 8 description.
28
BSDC
Internal Bias Node. Decouple with a series connection of 4 Ω and 1 μF to ground.
29
VPOS
Positive Supply.
30
IMON
Photodiode Monitor Output. IMON = 1.1 × INUM.
31
INNM
Numerator Voltage Input to Temperature Compensation Circuit.
32
VNUM
Voltage Output of Numerator Log Amplifier. Connect this pin to the INNM pin. For the fastest response, do
not add an external capacitor.
EPAD
PAD
Exposed paddle. Connect the exposed paddle to the VSM1 to VSM4 pins to provide low leakage guard.
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