Data Sheet
AD5940
Parameter
Allowed Duration of Overcurrent Limit1
Symbol Min
Typ
Max
Unit
Test Conditions/Comments
5
sec
User must limit duration of overcurrent condition
to less than 5 sec or risk damaging amplifier
Allowed Frequency of Overcurrent
Conditions1
Short-Circuit Protection
PROGRAMMABLE RESISTORS
Low Power TIA RLOAD on SE0 Inputs1
0 Ω RLOAD Accuracy
1
Per hour
mA
12
When amplifier output is shorted to ground
0.01
9.8
28
0.08
11.7
33.8
55
0.15
13.5
39
Ω
Ω
Ω
Ω
10 Ω RLOAD Accuracy
30 Ω RLOAD Accuracy
50 Ω RLOAD Accuracy
48
63
100 Ω RLOAD Accuracy
88
110
130
Ω
Drift over Temperature
200
400
ppm/°C
ppm/°C
10 Ω, 30 Ω, 100 Ω, 1500 Ω, 3000 Ω, and 3500 Ω
50 Ω
Low Power TIA RTIA on SE0 Input1
Accuracy
−5
+15
130
%
User programmable; includes 1 kΩ, 2 kΩ, 3 kΩ,
4 kΩ, 6 kΩ, 8 kΩ, 10 kΩ, 16 kΩ, 20 kΩ, 22 kΩ, 30 kΩ,
40 kΩ, 64 kΩ, 100 kΩ, 128 kΩ, 160 kΩ, 192 kΩ,
256 kΩ, and 512 kΩ
115
120
Ω
200 Ω setting with RLOAD = 100 Ω
Drift over Temperature
Mismatch Error1
100
ppm/°C
Error when moving up or down one RTIA value
512 kΩ to 2 kΩ range excluding 40 kΩ
40 kΩ (up to 48 kΩ, down to 32 kΩ)
200 Ω
−0.6
−3.5
+0.2
+0.5
20
+0.6
+3.5
%
%
%
High Speed TIA RTIA on SE0 Input
Accuracy
20
%
User programmable; includes 100 Ω, 200 Ω, 1 kΩ,
5 kΩ, 10 kΩ, 20 kΩ, 40 kΩ, 80 kΩ, and 160 kΩ
Drift
200
ppm/°C
High Speed TIA RLOAD on SE0 Input1
User programmable; includes 10 Ω, 30 Ω, 50 Ω,
and 100 Ω
Accuracy
Drift
High Speed TIA RTIA on DE0 Input1
102
110
160
116
Ω
Fixed 100 Ω target setting
ppm/°C
User programmable; includes 0.1 kΩ, 0.2 kΩ,
1.5 kΩ, 10 kΩ, 20 kΩ, 40 kΩ, 80 kΩ, and 160 kΩ
Accuracy
120
230
135
250
20
150
280
Ω
Ω
%
100 Ω setting
200 Ω setting
1 kΩ, 5 kΩ, 10 kΩ, 20 kΩ, 40 kΩ, 80 kΩ, and
160 kΩ
Drift over Temperature
350
200
ppm/°C
ppm/°C
100 Ω and 200 Ω settings
1 kΩ, 5 kΩ, 10 kΩ, 20 kΩ, 40 kΩ, 80 kΩ, and
160 kΩ
High Speed TIA RTIA Mismatch Error on
DE01
Error introduced when moving up or down one
RTIA value
−3.5
−25
+1
2
+3.5
+5
%
%
160 kΩ to 5 kΩ range
1 kΩ, 200 Ω, and 100 Ω
Load resistor on the DE0 pin (RLOAD_DE0
0 Ω setting
10 Ω setting
High Speed TIA RLOAD on DE0 Input1
Accuracy
)
0.001
5
0.15
11
Ω
Ω
26.5
32.6
15
0.2
37.6
25
Ω
%
30 Ω setting
50 Ω, and 100 Ω settings
10 Ω setting
Drift over Temperature
%/°C
ppm/°C
200
Excludes RLOAD = 0 Ω and 10 Ω
HIGH SPEED TIA
Bias Current
Maximum Current Sink/Source1
1
nA
mA
−3
+3
Ensure RTIA selection generates an output
voltage of < 900 mV with PGA gain = 1
Rev. 0 | Page 9 of 130
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