ADL5310-EVAL AD [Analog Devices], ADL5310-EVAL Datasheet - Page 5

• Manufacturer Part Number: ADL5310-EVAL
• Description: 120 dB Range (3 nA to 3 mA) Dual Logarithmic Converter
• Manufacturer: AD [Analog Devices]

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin No.
1, 6
2
3
4
5
7, 24
8, 9
10, 11, 20
12
13
14
15
16
17
18
19
21, 22
23
Mnemonic
VSUM
INP1
IRF1
IRF2
INP2
VREF
VPOS
VNEG
OUT2
SCL2
BIN2
LOG2
LOG1
BIN1
SCL1
OUT1
COMM
VRDZ
Function
Guard Pin. Used to shield the INP1 and INP2 input current lines, and for optional adjustment of the input
summing node potentials. Pin 1 and Pin 6 are internally shorted.
Channel 1 Numerator Input. Accepts (sinks) photodiode current I
such that photocurrent flows into INP1.
Channel 1 Denominator Input. Accepts (sinks) reference current, I
Channel 2 Denominator Input. Accepts (sinks) reference current, I
Channel 2 Numerator Input. Accepts (sinks) photodiode current I
such that photocurrent flows into INP2.
Reference Output Voltage of 2.5 V. Pin 7 and Pin 24 are internally shorted.
Positive Supply, (V
Optional Negative Supply, V
Applications sections. All VNEG pins must be connected externally.
Buffer Output for Channel 2.
Buffer Amplifier Inverting Input for Channel 2.
Buffer Amplifier Noninverting Input for Channel 2.
Output of the Logarithmic Front End for Channel 2.
Output of the Logarithmic Front End for Channel 1.
Buffer Amplifier Noninverting Input for Channel 1.
Buffer Amplifier Inverting Input for Channel 1.
Buffer Output for Channel 1.
Analog Ground. Pin 21 and Pin 22 are internally shorted.
Intercept Shift Reference Input. The top of a resistive divider network that offsets VLOG to position the
intercept. Normally connected to VREF; may also be connected to ground when bipolar outputs are to be
provided.
P
VSUM
VSUM
– V
INP1
INP2
IRF1
IRF2
N
) ≤ 12 V. Both pins must be connected externally.
Figure 2. 24-Lead LFCSP Pin Configuration
1
2
3
4
5
6
N
. These pins are usually grounded. For more details, see the General Structure and
24
7
PIN 1
INDICATOR
Rev. A | Page 5 of 20
23
DUAL LOG AMP
8
(Not to Scale)
ADL5310
TOP VIEW
22
9
21
10
20
11
19
12
18
17
16
15
14
13
SCL1
BIN1
LOG1
LOG2
BIN2
SCL2
PD1
PD2
RF1
RF2
. Usually connected to photodiode anode
. Usually connected to photodiode anode
.
.
ADL5310