4
LT1787/LT1787HV
1787fc
ELECTRICAL CHARACTERISTICS
The
● denotes the specifications which apply over the temperature range –40
°C ≤ TA ≤ 85°C, otherwise specifications are at
TA = 25°C. Total supply = (VS
– – VEE) = 2.5V to 36V (LT1787I), 2.5V to 60V (LT1787HVI) unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VS–, VS+
Sense Amplifier Supply Voltage Single Supply Operation (LT1787)
●
2.5
36
V
Single Supply Operation (LT1787HV)
●
2.5
60
V
VSENSE
Input Sense Voltage Full Scale
VSENSE = VS+ – VS–, VS = 10V, VBIAS = 5V, AV = 8 ±10%
●
500
mV
VOS
Input Offset Voltage (S8)
IOUT = 0, VS Supply = 5V
– 75
±40
75
V
–40
°C ≤ TA ≤ 85°C
●
– 200
200
V
IOUT = 0 (LT1787)
– 100
100
V
–40
°C ≤ TA ≤ 85°C
●
– 225
225
V
IOUT = 0 (LT1787HV)
– 100
100
V
–40
°C ≤ TA ≤ 85°C
●
– 225
225
V
Input Offset Voltage (MS8)
IOUT = 0, VS Supply = 5V
– 125
±40
125
V
–40
°C ≤ TA ≤ 85°C
●
– 250
250
V
IOUT = 0 (LT1787)
– 150
150
V
–40
°C ≤ TA ≤ 85°C
●
– 280
280
V
IOUT = 0 (LT1787HV)
– 150
150
V
–40
°C ≤ TA ≤ 85°C
●
– 280
280
V
VOS TC
Temperature Coefficient of VOS VS Supply = 5V (Note 6)
●
0.5
2
V/°C
IOUT(O)
No-Load Output Current Error
VSENSE = 0V
4
nA
VOUT(O)
No-Load Output Voltage Error
VSENSE = 0V, VS Supply = 5V
–600
600
V
(S8)
– 40
°C ≤ TA ≤ 85°C
● –1600
1600
V
No-Load Output Voltage Error
VSENSE = 0V, VS Supply = 5V
– 1000
1000
V
(MS8)
– 40
°C ≤ TA ≤ 85°C
● –2000
2000
V
gm
Tranconductance, IOUT/VSENSE
±VSENSE = 10mV, 50mV, 100mV, 150mV, 250mV,
400
A/V
VS Supply = Total Supply + |VSENSE|
AV
Gain, VOUT/VSENSE
±VSENSE = 100mV, VS Supply = 5V
●
7.76
8
8.24
V/V
Output Voltage Gain Error
±VSENSE = 100mV, VS Supply = 5V
●
–3
1
3
%
VS PSRR
VS Supply Rejection Ratio
VSENSE = 0V, VS Supply = 2.5V to 36V (LT1787)
●
120
135
dB
VSENSE = 0V, VS Supply = 2.5V to 60V (LT1787HV)
●
120
135
dB
VEE PSRR Negative Supply Rejection Ratio VSENSE = 0V, VS Supply = 15V, VBIAS = 0V,
●
100
130
dB
VEE = – 1V to – 15V (LT1787)
VSENSE = 0V, VS Supply = 40V, VBIAS = 0V,
●
100
130
dB
VEE = – 1V to – 15V (LT1787HV)
VOS
Change in Input Offset Voltage
VSENSE = 0V, VS Supply = 36V, VBIAS = 0.5V to 25V (LT1787)
●
100
130
dB
VBIAS
with Change in VBIAS Voltage
VSENSE = 0V, VS Supply = 60V, VBIAS = 0.5V to 25V (LT1787HV) ●
100
130
dB
IS+(O)
Positive Input Sense Current
VSENSE = 0V
●
10
20
A
IS–(O)
Negative Input Sense Current
VSENSE = 0V
●
50
100
A
IEE(O)
Negative Supply Current
VSENSE = 0V
●
60
120
A
IOUT
Output Current
VSENSE = ±128mV
±50
A
VOUT
Output Voltage
VSENSE = ±128mV, VS
+
≥ 3.3V
VBIAS ±1.024
V
Ripple Rejection
VS
+ = VS– = 20V, VS Supply = 1V, f = 1kHz
●
80
88
dB
VOMIN
Minimum Output Voltage
VSENSE = 0V, VBIAS = 0V
30
45
mV
VSENSE = VS+ – VS– = –128mV, VBIAS = 0V
10
mV
VSENSE = 0V, VBIAS = 0V
●
30
51
mV
VSENSE = VS+ – VS– = –128mV, VBIAS = 0V
10
mV