DRV401 Datasheet, PDF (3/28 Pages) Burr-Brown (TI) – Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensor

DRV401
www.ti.com
SBVS070A − JUNE 2006 − REVISED OCTOBER 2006
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range: T_J = −40°C to +125°C.
At T_A = +25°C and V_DD1 = V_DD2 = +5V with external 100kHz filter BW, and zero output current I_COMP, unless otherwise noted.
DRV401
PARAMETER
CONDITIONS
MIN
TYP
MAX
DIFFERENTIAL AMPLIFIER
OFFSET VOLTAGE
Offset Voltage, RTO⁽¹⁾⁽²⁾
Drift, RTO⁽²⁾
vs Common-Mode, RTO
vs Power-Supply, RTO
V_OS
dV_OS/dT
CMRR
PSRR
SIGNAL INPUT
Common-Mode Voltage Range
SIGNAL OUTPUT
Signal Over-Range Indication (OVER-RANGE), Delay⁽²⁾
Voltage Output Swing From Negative Rail⁽²⁾,
OVER-RANGE Trip Level
Voltage Output Swing From Positive Rail⁽²⁾,
OVER-RANGE Trip Level
Short-Circuit Current⁽²⁾
I_SC
Gain, V_OUT/V_{IN_DIFF}
Gain Error
Gain Error Drift
Linearity Error
FREQUENCY RESPONSE
Bandwidth⁽²⁾
Slew Rate⁽²⁾
Settling Time, Large-Signal⁽²⁾
Settling Time⁽²⁾
BW_−3dB
SR
R_L = 10kΩ to 2.5V, V_REFIN = 2.5V
Gain 4V/V
−1V to +6V, V_REF = 2.5V
V_REF not included
V_IN = 1V Step, See Notes 2 and 3
I = +2.5mA, CMP Trip Level
I = −2.5mA, CMP Trip Level
V_OUT Connected To GND
V_OUT Connected To V_DD
R_L = 1kΩ
CMVR = −1V to = +4V
dV ± 2V to 1%, No External Filter
dV ± 0.4V to 0.01%
±0.01
±0.1
±50
±4
±0.1
±1⁽³⁾
±250
±50
−1
V_DD − 85
(V_DD) + 1
2.5 to 3.5
+48
+85
V_DD − 48
−18
+20
4
±0.02
±0.3
±0.1
10
2
6.5
0.9
14
INPUT RESISTANCE
Differential
Common-Mode
External Reference Input
16.5
20
23.5
41
50
59
41
50
59
NOISE
Output Voltage Noise Density, f = 1kHz, RTO⁽²⁾
e_n
Compensation Loop Disabled
170
UNITS
mV
µV/°C
µV/V
µV/V
V
µs
mV
mV
mA
mA
V/V
%
ppm/°C
ppm
MHz
V/µs
µs
µs
kΩ
kΩ
kΩ
nV/√Hz
COMPENSATION LOOP
DC STABILITY
Offset Error⁽⁴⁾
Offset Error Drift⁽²⁾
Gain, Pin Gain = L⁽²⁾
Power-Supply Rejection Ratio
FREQUENCY RESPONSE
Open-Loop Gain, Two Modes, 7.8kHz
PROBE COIL LOOP
Input Voltage Clamp Range
Internal Resistor, IS1 or IS2 to V_DD1(2)
Internal Resistor, IS1 or IS2 to GND1⁽²⁾
Resistance Mismatch Between IS1 and IS2⁽²⁾
Total Input Resistance⁽³⁾
Comparator Threshold Current⁽³⁾
Minimum Probe Loop Half-Cycle⁽²⁾
Probe Loop Minimum Frequency
No Oscillation Detect (Error) Suppression
COMPENSATION COIL DRIVER, H-BRIDGE
Peak Current⁽²⁾
Voltage Swing
Output Common-Mode Voltage
Wire Break Detect, Threshold Current⁽⁵⁾
PSRR
Probe f = 250kHz, R_LOAD = 20Ω
Deviation from 50% PWM, Pin Gain = L
Deviation from 50% PWM, Pin Gain = L
|V_ICOMP1| − |V_ICOMP2|
Probe Loop f = 250kHz
Pin Gain H/L
R_HIGH
R_LOW
Field Probe Current < 50mA
ppm of R_HIGH + R_LOW
V_ICOMP1 − V_ICOMP2 = 4.0V_PP
20Ω Load
I_COMP1 and I_COMP2 Railed
0.03
7.5
−200
25
200
500
24/32
−0.7 to V_DD + 0.7
47
59
71
60
75
90
300
1500
134
200
22
28
34
250
280
310
250
35
250
4.2
V_DD2/2
33
57
%
ppm/°C
ppm/V
ppm/V
dB
V
Ω
Ω
ppm
W
mA
ns
kHz
µs
mA
V_PP
V
mA
3