|
Details, datasheet, quote on part number:ZRC250A02
| |
Datasheet text preview:
PRECISION 2.5 VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
ISSUE 3 - MARCH 1998 DEVICE DESCRIPTION
The ZRC250 uses a bandgap circuit design to achi eve a precision micropower voltage reference of 2.5 volts. The device is available in small outline surface mount packages, ideal for applications where space saving is important, as well as packages for through hole requirements. The ZRC250 design provides a stable voltage without an external capacitor and is stable w i t h capacitive loads. The ZRC250 is recommended for operation between 20µA and 5mA and so is ideally suited to low power and battery powered applications. Excellent performance is maintained to an absolute maximum of 25mA, however the rugged design and 20 volt processing allows the reference to withstand transient effects a n d currents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds. FEATURES
ZRC250
· · · · · · · · · · · · · ·
Small outline SOT23 and SO8 packages TO92 style packages No stabilising capacitor required Low knee current, 15µA typical Typical TC 30ppm/°C Typical slope resistance 0.4 ± 3, 2 and 1% tolerance Industrial temperature range Operating current 20µA to 5mA Transient response, stable in less than 10µs Optional extended current range
APPLICATIONS Battery powered and portable equipment. Instrumentation. Test equipment.
SCHEMATIC DIAGRAM
V
R
G nd
4-247
ZRC250
ABSOLUTE MAXIMUM RATING
Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85°C -55 to 125°C Power Dissipation (Tamb=25°C) SOT23 330mW E-line, 3 pin (TO92) 500mW E-line, 2 pin (TO92) 500mW SO8 625mW
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150µA LIMITS TYP MAX 2.525 2.55 2.575 20 5 30 IR(min) to IR(max) 0.4 IR = 1mA f = 100Hz IAC= 0.1 IR IR = 150µA f = 10Hz to 10kHz
40
TOL%
UNITS
2.475 2.5 2.45 2.5 2.425 2.5 13 0.02
1 2 3
V
IMIN IR TC
Minimum Operating Current Recommended Operating Current Average Reverse Breakdown Voltage Temp. Co. Slope Resistance Reverse Dynamic Impedance
µA mA ppm/°C
90
RS § ZR
1 0.8
0.3
EN
Wideband Noise Voltage
60 µV(rms)
TC =
(VR(max)-VR(min)) x 1000000
VR x (T(max)-T(min))
Reverse Current (µA)
30
Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range.
20
§
RS =
VR Change(IR (min) to IR (max)) IR (max) - IR (min)
10
TA=25°C
0 0
1.0
2.0
3. 0
Reverse Voltage (V)
Reverse Characteristics
4-248
ZRC250
TYPICAL CHARACTERISTICS
1.4 2.51 1.2
IR=150µA to 5mA
1.0
Reference voltage (V)
1 10 100
Forward Voltage (V)
2.50
0.8
2.49
0.6
0.4
2.48
0.2 2.47
0.001
0.01
0.1
-40
-20
0
20
40
60
80
Forward Current (mA)
Temperature (°C)
Forward Characteristics
1000 1.4 1.2
Temperature Drift
Slope resistance ()
1.0
0.8
Slope resistance ()
85°C 25°C -40°C
IR=150µA
100
10
0.6
IR=5mA
1
0.4
0.2
IR=1mA
0.1 1 10 100 10 100 1K 10K 100K
Reference Current (mA)
Frequency (kHz)
Slope Resistance v Current
Slope Resistance v Frequency
10
VIN (V)
0
VIN (V)
10
0
IR=5mA
3
IR=5mA
2
IR=150µA
1
VR (V)
2
0
VR (V)
1
IR=150µA
0
0
4
8
12
16
0
4
8
12
16
Time (µs)
Time (µs)
Transient Response - Single pulse
Transient Response - Repetitive Test
4-249
|
|
