PUBLIC
Doc. DS-100675 V1.7
WWW.CISSOID.COM
1 of 4
The Leader in High Temperature
Semiconductor Solutions
CHT-BG3M-Datasheet
Version: 1.7
27-Nov-14
(Last Modification Date)
General Description
The CHT-BG3M is a bandgap voltage ref-
erence compatible with High Temperature
environments. Typical operation tempera-
ture range extends from -55°C to 225°C.
Its total precision (initial plus temperature
drift plus line and load regulation) is better
than 2%.
The CHT-BG3M has a quiescent current
consumption of 700µA. The circuit can
deliver an output current of up to 3mA into
an external load at 225°C. It is stable
throughout the whole temperature range
for load capacitances between 0 and 3nF.
The minimum dropout voltage is 1.5V(1)
with a load current lower than 1mA and
2.5V(1) at 3mA load current. The maximum
acceptable dropout voltage (Vin-Vout) is
15V.
The CHT-BG3M is available in TO-39
package and in bare die. Other packages
are available upon request.
Applications
Precise Voltage reference with low tem-
perature drift for High Temperature elec-
tronic systems used in Well logging, Au-
tomotive, Aeronautics or Aerospace appli-
cations.
Features
1.5V(1) to 15V(2) Dropout voltage
@1mA
2.5V(1) to 15V(2) Dropout voltage
@3mA
Max. output current: 3mA @225°C
Max. load capacitance 3nF
Output voltage programmable by
bonding option (bare die version)
Available in TO-39 and bare die form
(contact CISSOID). Other packages
available on request.
Validated at 225°C for 30000 hours
(and still on-going)
Start-up operational over the whole
temperature range
Latch-up free
Note 1: for CHT-BG3M-025, min dropout is 2V @1mA and 3V @3mA
Note 2: Input voltage cannot exceed 25V.
27-Nov-14 Contact : Gonzalo Picún (+32-10-489214)Nov. 14
CHT-BG3M-Datasheet
(Last Modification Date)
PUBLIC
Doc. DS-100675 V1.7
WWW.CISSOID.COM
2 of 4
Absolute Maximum Ratings
Supply Voltage Vin -0.5 to 25V
Junction temperature 315°C
ESD Rating (expected)
Human Body Model 1kV
Operating Conditions
Dropout Voltage 1.5V(1) to 15V(2)
Junction temperature -55°C to +225°C
Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating
and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied. Frequent or extended exposure to absolute maximum rating conditions or above may affect device reliability.
During power up/restart without voltage regulator and depending on the quality of the power supply, peak voltage higher than 25V
may be seen by the BG3M input, which exceeds the absolute maximum ratings and can cause permanent damage. This issue can be
minimized by adding big decoupling capacitor (>10µF) close to the BG3M input.
Electrical Characteristics
Following table is relative to the 5V mode (CHT-BG3M-050).
For other nominal voltage, see notes under this table.
Values over the whole temperature range (-55°C < Tj <225°C) in bold.
Parameter
Condition
Min
Typ
Max
Units
note
Output voltage
Initial accuracy
IL=1mA, Vin=Vout+3V,
Tj = 25°C
-1
+1
%
Total accuracy
IL=[1mA..3mA],
Vin = [Vout+3V .. Vout+15V]
-2
0
2
%
Drift with tempera-
ture
IL=1mA, Vin=Vout+3V
0
70
ppm
(3)
Line regulation
IL=1mA,
Vin=[Vout+2V..Vout+15V]
-1
1
mV/V
(4)
Load regulation
Rout
IL=0mA to 3mA
Vin=Vout+3V
Tj=25°C
-7
mV/mA
IL=0mA to 3mA
Vin=Vout+3V
Tj=225°C
-16
Dropout
Vin-Vout
IL=1mA
1.5
V
(1)
IL=3mA
2.5
V
(1)
Quiescent Ground
Pin current
0 < IL <3mA ; Vin=Vout+3V
700
800
µA
Power supply rejec-
tion ratio
f=0Hz ..100Hz
Vin=Vout+2V; Iload=0mA
60
dB
(5)
Output noise
0.1Hz-10Hz
IL=0mA; Tj = 225°C
100
µVRMS
(6)
Note 1: for CHT-BG3M-025, min dropout is 2V @1mA and 3V @3mA
Note 2: Input voltage cannot exceed 25V.
Note 3: ppm are defined as [d(Vout)/d(T)]/Vout. For 5V mode, 70ppm corresponds to 350µV/°C.
Note 4: Defining “x” as the nominal voltage, the line regulation is better than x/5 mV/V.
Note 5: Defining “x” as the nominal voltage, the minimum power supply rejection ratio is 66-1.2x .dB
Note 6: Defining “x” as the nominal voltage, typical noise level is (x/5)*240µVRMS
27-Nov-14 Contact : Gonzalo Picún (+32-10-489214)Nov. 14
CHT-BG3M-Datasheet
(Last Modification Date)
PUBLIC
Doc. DS-100675 V1.7
WWW.CISSOID.COM
3 of 4
Typical Performance Characteristics (5V mode)
Figure 1: CHT-BG3M-050 output voltage ver-
sus input voltage from -55°C up to 225°C
(Iload=0mA; Cload=1nF)
Figure 3: CHT-BG3M-050 output voltage ver-
sus load current from -55°C up to 225°C
(Vin=8V; Cload=1nF)
Figure 2: CHT-BG3M-050 output voltage ver-
sus input voltage from -55°C up to 225°C
(Iload=3mA; Cload=1nF)
Figure 4: CHT-BG3M-050 input ripple rejection @ 25°C
(Vin=7V; Iload=0; Cload=1nF)
Available Packaging Options
Figure 1. CHT-BG3M in TO-39 package
NOTES:
The CHT-BG3M can also be ordered as die.
Packaging options shown are only indicative. Other possibilities are also avail-
able.
Ask CISSOID for other packaging configurations.
Product Reference
CHT-BG3M-XXX-YYYY
XXX= Output voltage. Example : 3.3V=033 ; 5V=050 ; 12V=120
YYYY= TO39
Ex: CHT-BG3M-050-TO39 = 5V reference with TO39 package
10 100 1k 10k 100k
-60
-40
-20
0
-80
dB(vout/vin)
f(Hz)
10 100 1k 10k 100k
-60
-40
-20
0
-80
dB(vout/vin)
f(Hz)
Vin
Vout
gnd
Vin
Vout
gnd
TO-39 bottom view
27-Nov-14 Contact : Gonzalo Picún (+32-10-489214)Nov. 14
CHT-BG3M-Datasheet
(Last Modification Date)
PUBLIC
Doc. DS-100675 V1.7
WWW.CISSOID.COM
4 of 4
Package Dimensions
8.20
9.20
18.22
45.0°
Ø9.20
Ø8.20
5.10
Ø0.80*2
0.80
0.80
13.76
0.70
2.65
Ø0.40*3
Ø0.55
Drawing TO39 (mm +/- 10%)
Contact & Ordering
CISSOID S.A.
Headquarters and
contact EMEA:
CISSOID S.A. – Rue Francqui, 3 – 1435 Mont Saint Guibert - Belgium
T : +32 10 48 92 10 - F: +32 10 88 98 75
Email: sales@cissoid.com
Sales
Representatives:
Visit our website: http://www.cissoid.com
Disclaimer
Neither CISSOID, nor any of its directors, employees or affiliates make any representations or extend any warranties
of any kind, either express or implied, including but not limited to warranties of merchantability, fitness for a particular
purpose, and the absence of latent or other defects, whether or not discoverable. In no event shall CISSOID, its di-
rectors, employees and affiliates be liable for direct, indirect, special, incidental or consequential damages of any kind
arising out of the use of its circuits and their documentation, even if they have been advised of the possibility of such
a damage. The circuits are provided “as is”. CISSOID has no obligation to provide maintenance, support, updates, or
modifications.