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PRELIMINARY
DS4812
Low Voltage, High Slew Rate,
Rail-To-Rail Dual Op-Amp
FEATURES
High Slew Rate: 10V/µs
High Gain Bandwidth: 6.5 MHz
Supply Voltage Range 2.5 to 5.5V
Rail-to-Rail Output Swing
1.75 mA Supply Current per Channel
ORDERING INFORMATION
Part Number Description
DS4812 8-pin DIP
DS4812S 8-pin SOIC
DS4812U
DS4812X 8-bump CSP
For mechanical dimensions see web site.
8-pin µ-SOP
PACKAGES/PINOUTS
1
AOUT
2
AIN-
A
-
+
3
AIN+
45
GND
300-mil DIP
150-mil SOIC
118-mil µ-SOP
VDD
1
AOUT
A
-
+
2
AIN-
3
AIN+
GND
8
VDD
7
BOUT
B
-
+
6
BIN-
BIN+
8
7
BOUT
B
-
+
6
BIN-
5
BIN+
4
8-bump CSP
DESCRIPTION
The DS4812 BiCMOS dual operational amplifier combines high slew rate and rail-to-rail output swing.
The device provides 10V/µs of slew rate and 6.5 MHz of bandwidth while only consuming 1.5 mA of
supply current per channel. Ideal low voltage BiFET substitute for low gain, high speed applications.
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ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD (see Note 1)............5.5V
DS4812
Differential Input Voltage (see Note 2)....± V
Input Voltage Range, VI(see Note 1) .......-0.3V to V
DD
DD
Input Current, IDD.....................................± 4 mA
Output Current, IO....................................± 50 mA
Total current into VDD..............................± 50 mA
Total current out of GND.........................± 50 mA
Duration of short-circuit current (See Note 3) unlimited
Operating Temperature............................0 oC to +70 oC
Storage Temperature................................-55 oC to +125 oC
Soldering Temperature.............................See J-STD-020A Specification
NOTES:
1. Relative to GND.
2. Non-inverting input relative to inverting input. Excessive current flows when input is brought below
GND - 0.3V.
3. The output may be shorted to either supply. Temperature and/or supply voltages must be limited to
ensure that the maximum dissipation rating is not exceeded.
RECOMMENDED OPERATING CONDITIONS
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Supply Voltage V
Input Voltage Range V
Common-Mode Input Voltage V
Free-Air Operating Temperature T
DD
I
CM
A
2.5 5.5 V 1
0V
0V
070
- 1.7 V 1
DD
- 1.7 V
DD
o
C
NOTES:
1. Voltage referenced to GND.
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ELECTRICAL CHARACTERISTICS
DS4812
Conditions: (T
: 0°C – 70°C. VDD = 3.0V)
A
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Offset Voltage
= 0.5V, RS = 50Ω, V
(V
IC
OUT
= 1.5V)
V
IO
15mV
Temperature Coefficient of Input Offset
Voltage
(V
= 0.5V, RS = 50Ω, V
IC
OUT
= 1.5V)
Input Offset Current
(V
= 0.5V, RS = 50Ω, V
IC
OUT
= 1.5V)
Input Bias Current
(V
= 0.5V, RS = 50Ω, V
IC
OUT
= 1.5V)
Common-mode Input Voltage Range
| ≤ 10mV
|V
IO
High Level Output Voltage
(IOH = -0.5 mA)
Low Level Output Voltage
(IOL = 0.5 mA)
αV
I
I
V
V
V
IO
IB
ICR
OH
OL
IO
0 1.3 V
2.5 2.8 V
10
µV/°C
1 500 pA
2 500 pA
0.15 0.5 V
Large Signal Differential Voltage
Amplification
(V
= 0.5V, RL = 10 kΩ, 1V ≤ VO ≤ 2V)
IC
Common Mode Input Capacitance c
Common Mode Rejection Ratio
(0V ≤ V
≤ 1.0V, VO = 1.5V)
IC
A
VD
i(c)
60 68 dB
4pF
CMRR 40 50 dB
Supply Voltage Rejection Ratio
(3V ≤ V
DD
≤ 5V, V
= VDD/2 – 1V, no
IC
k
SVR
70 80 dB
load)
Amplifier Supply Current (per channel)
(VO = 1.5V, no load)
Slew Rate at Unity Gain
= 50 pF)
(C
L
Unity Gain Bandwidth
(CL = 50 pF)
Phase Margin at Unity Gain
= 50 pF)
(C
L
Gain Margin
(CL = 50 pF)
I
DD
SR 5 7.5
1.5 2.5 mA
V/µs
UGBW 5.0 MHz
φ
M
54 Degree
6dB
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Page 4
ELECTRICAL CHARACTERISTICS cont.
DS4812
Conditions: (T
: 0°C – 70°C. VDD = 5.0V)
A
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Offset Voltage
= 1.5V, RS = 50Ω, V
(V
IC
OUT
= 2.5V)
V
IO
15mV
Temperature Coefficient of Input Offset
Voltage
(V
= 1.5V, RS = 50Ω, V
IC
OUT
= 2.5V)
Input Offset Current
(V
= 1.5V, RS = 50Ω, V
IC
OUT
= 2.5V)
Input Bias Current
(V
= 1.5V, RS = 50Ω, V
IC
OUT
= 2.5V)
Common-mode Input Voltage Range
| ≤ 10 mV
|V
IO
High Level Output Voltage
(IOH = -1.0 mA)
Low Level Output Voltage
(IOL = 1.0 mA)
αV
I
I
V
V
V
IO
IB
ICR
OH
OL
IO
0 3.3 V
4.5 4.8 V
10
µV/°C
1 500 pA
2 500 pA
0.15 0.5 V
Large Signal Differential Voltage
Amplification
(V
= 1.5V, RL = 10 kΩ, 1.5V ≤ VO ≤ 3.5V)
IC
Common Mode Input Capacitance c
Common Mode Rejection Ratio
(0V ≤ V
≤ 2.7V, VO = 2.5V)
IC
Supply Voltage Rejection Ratio
(3V ≤ V
DD
≤ 5V, V
= VDD/2 – 1V, no load)
IC
Amplifier Supply Current (per channel)
(VO = 2.5V, no load)
Slew Rate at Unity Gain
(CL = 50 pF)
Unity Gain Bandwidth
(C
= 50 pF)
L
Phase Margin at Unity Gain
(C
= 50 pF)
L
Gain Margin
= 50 pF)
(C
L
A
VD
i(c)
60 72 dB
4pF
CMRR 45 55 dB
k
SVR
I
DD
SR 7 10
70 80 dB
1.75 2.5 mA
V/µs
UGBW 6.5 MHz
φ
M
46 Degree
4dB
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DISTRI BUTIO N OF DS481 2
INPUT OFFSET VOLTAG E
30%
VDD = 3.0 V
25%
= 10K
R
L
T
= 25oC
A
20%
15%
10%
5%
Percentage of Amplifiers - %
0%
-2.0 -1.6 -1.2 -0.8 -0.4 0.0 0.4 0.8 1.2 1.6 2.0
V
- I nput O f f set Voltage - m V
IO
Figure 1.0
DS4812
Percentage of Amplifiers - %
DISTRI BUTI ON O F DS481 2
INPUT OFFSET VOLTAGE
35%
30%
25%
VDD = 5. 0 V
R
= 10K
L
T
= 25oC
A
20%
15%
10%
5%
0%
-2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2
V
- Input Off set Vol t age - m V
IO
Figure 2.0
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DS4812
V
V
INPUT O FF SET VO L TAG E
vs
COMM ON- MODE I N PUT V OLTAGE
5
4
3
VDD = 3. 0 V
T
= 25oC
A
2
1
0
-1
-2
-3
- Input Offset Voltage - m
IO
V
-4
-5
-0.5 0 0.5 1 1.5 2
V
- Common-Mode Input Voltage - V
IC
Figure 3.0
INPUT O FF SET VO L TAG E
vs
COMMON-MODE INPUT VOLTAGE
5
4
3
VDD = 5. 0 V
= 25oC
T
A
2
1
0
-1
-2
- Input Offset Voltage - m
-3
IO
V
-4
-5
-0.500.511.522.533.54
V
- Common-Mode Input Voltage - V
IC
Figure 4.0
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Page 7
20%
15%
10%
Percentage of Amplifiers - %
DI STRIBUT IO N OF D S4 81 2
INPUT OFFSET VOLTAGE
TEM PE RATURE COEFFICIENT
VDD = 3. 0 V
R
= 10K
L
T
= 25oC
A
to 85°C
5%
0%
-40-35-30-25-20-15-10-5 0 5 10152025303540
- Temperature Coefficient - uV/oC
ααααV
IO
DS4812
20%
15%
10%
Percentage of Amplifiers - %
Figure 5.0
DIST RIBUTIO N OF DS4 8 12
INPUT O FFSET VOLTAG E
TEM PERATURE COEFF ICIENT
VDD = 5.0 V
R
= 10K
L
= 25oC
T
A
5%
0%
-40-35-30-25-20-15-10-5 0 5 10152025303540
ααααV
- Temper at ur e Coeff i cient - uV/oC
IO
to 85°C
Figure 6.0
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Page 8
2.5
V
V
DS4812
HIG H-LEVEL O UTPUT VOLTAG E
vs
HIGH-LEVEL OUTPUT CURRENT
3
VDD = 3.0 V
125oC
2
0oC
85oC
1.5
1
-40oC
- High-Level Output Voltage -
0.5
OH
V
25oC
0
0.00 0.50 1.00 1.50 2.00 2.50
I
- High-Level Output Curre nt - mA
OH
Figure 7.0
HIGH-LEVEL O UTPUT VO LTAG E
vs
HI G H-LE VEL O U TP UT CU RRENT
5
4.5
3.5
2.5
4
3
85oC
0oC
VDD = 5.0 V
125oC
2
1.5
-40oC
1
- High-Level Output Voltage -
OH
V
0.5
25oC
0
0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50
I
- High- Level O ut put Cur r ent - m A
OH
Figure 8.0
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LOW - LEVEL OUTPUT VOLT AGE
vs
LOW-L EVE L OUTPUT CURRENT
2.0
VDD = 3.0 V
1.8
1.5
125oC
25oC
0oC
1.3
85oC
1.0
-40oC
0.8
0.5
- Low-Level Output Voltage - V
OL
0.3
V
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3. 0 3.5 4.0
- Low-Level Output Current - mA
I
OL
DS4812
Figure 9.0
LOW- LEVEL OUTPUT VOLTAGE
vs
LOW -LEVEL OUTPUT CURRE NT
2.0
1.8
1.5
1.3
1.0
0.8
0.5
- Low-Level Output Voltage - V
0.3
OL
V
0.0
VDD = 5.0 V
0oC 125oC
-40oC
85oC
25oC
012345
- Low-Level Output Current - mA
I
OL
Figure 10.0
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Page 10
SHORT - C IRCUI T OUTPUT CURRENT
A
A
vs
FREE-A IR TEMPERA TURE
5
4
I
3
OSL
2
1
VDD = 3. 0 V
0
-1
-2
I
-3
OSH
- Short-Circuit Output Current - m
OS
I
-4
-5
-50 -25 0 25 50 75 100 125
- Free- Air Temp er at ur e - oC
T
A
DS4812
Figure 11.0
SHORT -CIRCUIT OUTPUT CURRENT
vs
FREE-AIR TEMPERATURE
5
4
3
2
1
VDD = 5. 0 V
0
-1
-2
-3
- Short-Circuit Output Current - m
OS
I
-4
-5
-50 -25 0 25 50 75 100 125
I
OSL
I
OSH
- Free- Air Tem per at ur e - oC
T
A
Figure 12.0
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Page 11
40
B
B
20
LA RG E-SIGNA L DIFFERENTIAL VOLTA GE A MPLI FICA TION
AND PHASE MARGIN
vs
FREQUENCY
Phase
A
VD
VDD = 3. 0 V
T
= 25oC
A
R
= 10K
L
C
= 50pF
L
DS4812
90
45
0
- Gain Margin - d
VD
-20
A
-40
100K 1M 10M 100M
f - Frequency - Hz
Figure 13.0
LARGE-SIG NAL DIFFERENTIA L VOLTAGE AM PLIFI CATI O N
AND PHA SE M A RG IN
vs
FREQUENCY
40
20
Phase
A
VD
VDD = 5.0 V
= 25oC
T
A
= 10K
R
L
= 50pF
C
L
0
-45
Phase Margin - degrees
-90
90
45
0
0
- Gain Margin - d
VD
-20
A
-40
-45
Phase Margin - degrees
-90
100K 1M 10M 100M
f - Frequency - Hz
Figure 14.0
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Page 12
DS4812
SUPPLY CURRE NT
vs
SUPPLY VOLTAG E
5
VIC = 30% V
DD
4
3
2
- Supply Current - mA
DD
I
1
0
00.511.522.533.544.55
- Supply Voltage - V
V
DD
125oC
-40oC
0oC
85oC
25oC
Figure 15.0
COMMON-MO DE RE JE CTIO N RATI O
vs
FREQUENCY
80.0
60.0
VDD = 3.0 V
40.0
20.0
CMRR - Common-Mode Rejection Ratio - dB
0.0
100K 1M 10M
VDD = 5.0 V
f - Fre quency - Hz
Figure 16.0
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Page 13
SUPPLY-V O L T AG E REJ EC TIO N RATI O
vs
80
FREQUENCY
VDD = 3.0V
60
40
- Supply-Voltage Rejection Ratio - dB
20
SVR
k
0
1K 10K 100K 1M 10M
f - Frequency - Hz
DS4812
80
60
40
- Supply-Voltage Rejection Ratio - dB
20
SVR
k
Figure 17.0
SUPPLY - VOLTA GE REJECTION RA T IO
vs
FREQUENCY
VDD = 5.0V
0
1K 10K 100K 1M 10M
f - Frequency - Hz
Figure 18.0
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Page 14
1.100
T
1.050
1.000
- Output Voltage - V
0.950
O
V
0.900
0 200 400 600 800 1000
VOLTAGE-FOLLOWER
SMALL- SIG NAL PULSE RESPONSE
t - Time - ns
VDD = 3.0 V
= +1
A
V
= 10K
R
L
C
= 50 pF
L
= 25oC
DS4812
2.600
2.550
2.500
- Output Voltage - V
O
2.450
V
2.400
0 200 400 600 800 1000
Figure 19.0
VOLTAGE-FOLLOWER
SMA L L- SI GNA L PULSE RESPO NSE
VDD = 5. 0 V
A
= +1
V
= 10K
R
L
C
= 50pF
L
T
= 25oC
A
t - Time - ns
Figure 20.0
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Page 15
2.000
A
1.800
1.600
1.400
1.200
1.000
0.800
0.600
- Output Voltage - V
O
V
0.400
0.200
0.000
0 200 400 600 800 1000
VOLTAGE-FOLLOWER
LA RG E- S I GNA L PULSE RESPONSE
t - Time - ns
VDD = 3.0 V
A
= +1
V
R
= 10K
L
C
= 50pF
L
T
= 25oC
DS4812
3.500
3.250
3.000
2.750
2.500
2.250
- Output Voltage - V
O
2.000
V
1.750
1.500
0 200 400 600 800 1000
Figure 21.0
VOLTAGE-FOLLOWER
LA RGE- SIG NAL PULSE RESPONSE
VDD = 5.0 V
A
= +1
V
R
= 10K
L
C
= 50pF
L
T
= 25oC
A
t - Time - ns
Figure 22.0
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Page 16
1.100
1.050
1.000
- Output Voltage - V
O
0.950
V
0.900
0 200 400 600 800 1000
INVERTING SMA L L-SI GNAL
PULSE RESPONSE
t - Time - ns
VDD = 3. 0 V
A
= -1
V
R
= 10K
L
C
= 50pF
L
T
= 25oC
A
DS4812
2.600
2.550
2.500
- Output Voltage - V
O
2.450
V
2.400
0 200 400 600 800 1000
Figure 23.0
INVERTING SMALL- SIG NAL
PULSE RESPO NSE
VDD = 5.0 V
A
= -1
V
R
= 10K
L
C
= 50pF
L
T
= 25oC
A
t - Time - ns
Figure 24.0
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Page 17
2.000
V
1.800
1.600
1.400
1.200
1.000
0.800
0.600
- Output Voltage - V
O
0.400
V
0.200
0.000
0 200 400 600 800 1000
INVERTING LARGE-SIGNAL
PULSE RESPO NSE
t - Time - ns
VDD = 3.0 V
A
= -1
V
R
= 10K
L
C
= 50p F
L
o
DS4812
- Output Voltage -
O
V
3.500
3.250
3.000
2.750
2.500
2.250
2.000
1.750
1.500
Figure 25.0
Figure 26.0
INVERTING LARGE-SIGNAL
PULSE RESPONSE
VDD = 5.0 V
A
= -1
V
= 10K
R
L
= 50 pF
C
L
0 200 400 600 800 1000
t - Time - ns
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Page 18
70
60
PHASE MARGIN
vs
LO AD CAPACITANCE
R
= 50
null
DS4812
50
40
VDD = 3.0 V
R
= 10K
L
T
= 25oC
A
30
20
10
Phase Margin - degrees
0
1 10 100 1K 10K
12
10
AC
+
-
8
+VDD/2
-VDD/2
+VDD/2
AC
+
-
-VDD/2
R
NULL
C
- Load Capacitance - pF
L
Figure 27.0
GAIN MARGIN
LOAD CAPACI T ANCE
R
NULL
C
R
LOAD
LOAD
C
LOADRLOAD
vs
R
= 20
null
R
= 50
null
R
= 10
null
R
= 20
null
R
= 0
null
6
4
Gain Margin - dB
2
VDD = 3.0 V
= 10K
R
L
= 25oC
T
A
R
= 10
null
R
= 0
null
0
1 10 100 1K 10K
- Load Capacitance - pF
C
L
Figure 28.0
18 of 19
Page 19
UNIT Y- GAI N BANDWIDTH
vs
LOAD CAPA CITANCE
6
VDD = 3.0 V
5
R
= 10K
L
= 25oC
T
A
4
3
2
1
Unity-Gain Bandwidth - MHz
0
1 10 100 1K 10K
- Load Capacitance - pF
C
L
DS4812
Figure 29.0
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