Datasheet

UCD7230
www.ti.com SLUS741D –NOVEMBER 2006–REVISED JANUARY 2010
ELECTRICAL CHARACTERISTICS (continued)
V
DD
= P
VDD
= 12 V, 4.7-mF from V
DD
to A
GND
, 1 mF from P
VDD
to P
GND
, 0.1 mF from CSBIAS to AGND, 0.22 mF from BST to
SW, T
A
= T
J
= -40°C to +125°C, R
CS+
= 5 kΩ, R
DLY
= 50 kΩ over operating free-air temperature range (unless otherwise
noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CURRENT SENSE COMPARATOR (INPUT SENSE)
R
DLY
= 24.3 kΩ (CSBIAS-CS+) 170 235 300
CS threshold mV
R
DLY
= 49.9 kΩ (CSBIAS-CS+) 90 114 140
R
DLY
= 24.3 kΩ , IN rising to OUT1,
120
IN falling to OUT2, VDD = 6 V
CS blanking time
(2)
ns
R
DLY
= 49.9 kΩ , IN rising to OUT1,
230
IN falling to OUT2, VDD = 6 V
R
DELAY
range
(2)
24.3 50.0 100.0 kΩ
Propagation delay from CS+ to
80
OUT1
(2)
CS = threshold + 60mV ns
Propagation delay from CS+ to
70
CLF
(2)
CURRENT SENSE AMP
I0 = OPEN; POS = NEG = 1.25 V;
V
OO
Output offset voltage -100 0 100 mV
measure AO - IO
I0 = FLOAT; V
POS
= 1.26 V; V
NEG
=
Closed loop dc gain 46 48 50 V/V
1.25 V, R
POS
= R
NEG
= 0
POS = 1.25 V, NEG = 1.29 V,R =
Input impedance 5.5 8.3 12 kΩ
(POS - NEG) / (I
POS
- I
NEG
)
V
CM(max)
is limited to (V
DD
-1.2V),
V
CM
Input Common Mode Voltage Range 0 5.6 V
R
POS
= 0
V
POS
= 1.2 V; V
NEG
= 1.3 V;
A0_Vol Minimum Output Voltage 0.15 0.3
A0_I
SINK
= 250 mA
V
V
POS
=1.3 V; V
NEG
= 1.2 V; A0_
A0_Voh Maximum Output Voltage 3 3.1 3.5
I
SOURCE
= 500 mA
I0 = FLOAT; V
POS
= V
NEG
= 0.8 V to
Input Bias Current, POS or NEG -2 30 mA
5.0 V, R
POS
= R
NEG
= 0
ZERO CURRENT REFERENCE (IO)
Reference voltage Measured at I0 0.54 0.6 0.66 V
Input transition voltage With respect to IO reference 10 60 120 mV
I
O
Output impedance I
ZERO
= 0.6 V 10 15 21 kΩ
(2) As designed and characterized. Not 100% tested in production.
Copyright © 2006–2010, Texas Instruments Incorporated 7
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