OP200GZ Datasheet, PDF (14/16 Pages) Analog Devices – Dual Low Offset, Low Power Operational Amplifier

OP200
Data Sheet
PROGRAMMABLE HIGH RESOLUTION WINDOW
COMPARATOR
The programmable window comparator shown in Figure 35 is
easily capable of 12-bit accuracy over the full military temperature
range. A dual CMOS 12-bit DAC, the DAC8221, is used in the
voltage switching mode to set the upper and lower thresholds
(DAC A and DAC B, respectively).
15V
V_IN
21
V_DD
8
10V
REFERENCE
VOLTAGE
2 ^IOUT A
DAC A
1/2
DAC8221
V_{REF A 4}
3
R1
10kΩ ₂
DAC DATA BUS
PIN 6 (MSB) TO PIN 17 (LSB)
15V– ⁴
R2
10kΩ ₅
24 ^IOUT B
DAC B
1/2
V_{REF B} 22
6
DAC8221
DAC
CONTROL
SIGNALS
18 _{DAC A/DAC B}
19 _CS
20 _WR
DGND
5
AGND
1
1/2
OP200AZ
1/2
OP200AZ
1
D1
1N4148 _R2
10kΩ
5V
TTL OUT
D1
1N4148
7
R4
10kΩ
Q1
2N2222
Figure 35. Programmable High Resolution Window Comparator
Rev. E | Page 14 of 16