AD537–SPECIFICATIONS
(typical @ +25 C with V (total) = 5 V to 36 V, unless otherwise noted)
S
Model
AD537JH
CURRENT-TO-FREQUENCY CONVERTER
Frequency Range
0 kHz to 150 kHz
1
Nonlinearity
f
MAX
= 10 kHz
0.15% max (0.1% typ)
0.25% max (0.15% typ)
f
MAX
= 100 kHz
Full-Scale Calibration Error
±
10% max
C = 0.01
µF,
I
IN
= 1.000 mA
±
0.1%/V max (0.01% typ)
vs. Supply (f
MAX
< 100 kHz)
vs. Temp (T
MIN
to T
MAX
)
±
150 ppm/°C max (50 ppm typ)
ANALOG INPUT AMPLIFIER
(Voltage-to-Current Converter)
Voltage Input Range
Single Supply
0 to (+V
S
– 4) Volts (min)
Dual Supply
–V
S
to (+V
S
– 4) Volts (min)
Input Bias Current
(Either Input)
100 nA
Input Resistance (Noninverting)
250 MΩ
Input Offset Voltage
(Trimmable in “D” Package Only)
5 mV max
vs. Supply
200
µV/V
max
5
µV/°C
vs. Temp (T
MIN
to T
MAX
)
Safe Input Voltage
3
±
V
S
REFERENCE OUTPUTS
Voltage Reference
Absolute Value
1.00 Volt
±
5% max
vs. Temp (T
MIN
to T
MAX
)
50 ppm/°C
vs. Supply
±
0.03%/V max
380
Ω
Output Resistance
4
Absolute Temperature Reference
5
Nominal Output Level
1.00 mV/K
Initial Calibration @ +25°C
298 mV (± 5 mV typ)
Slope Error from 1.00 mV/K
±
0.02 mV/K
Slope Nonlinearity
±
0.1 K
Output Resistance
5
900
Ω
OUTPUT INTERFACE (Open Collector Output)
(Symmetrical Square Wave)
Output Sink Current in Logic “0”
V
OUT
= 0.4 V max (T
MIN
to T
MAX
) 20 mA min
Output Leakage Current in Logic “1”
(T
MIN
to T
MAX
)
200 nA max
Logic Common Level Range
–V
S
to (+V
S
– 4) Volts
Rise/Fall Times (C
T
= 0.01
µF)
0.2
µs
I
IN
= l mA
I
IN
= 1
µA
1
µs
POWER SUPPLY
Voltage, Rated Performance
Single Supply
4.5 V to 36 V
Dual Supply
±
5 V to
±
18 V
Quiescent Current
1.2 mA (2.5 mA max)
TEMPERATURE RANGE
Rated Performance
0°C to +70°C
Storage
–65°C to +150°C
PACKAGE OPTIONS
6, 7
D-14 Ceramic DIP
H-10A Header
AD537JH
AD537JD
*
*
*
±
7% max
*
*
AD537KD
AD537KH
*
0.07% max
0.1% max
±
5% max
*
50 ppm/°C max (30 ppm typ)
2
AD537SD
1
AD537SH
1
*
**
**
**
*
250 ppm/°C max
*
*
*
*
*
100
µV/V
max
*
*
*
*
*
*
2 mV max
100
µV/V
max
1
µV/°C
*
*
*
*
*
**
**
10
µV/°C
max
*
*
*
*
*
*
*
*
*
*
*
100 ppm/°C max
*
*
*
298 mV (± 5 mV max)
*
*
*
*
**
*
*
*
**
*
*
*
20 mA min
*
*
*
*
20 mA min
*
*
*
*
10 mA min
2
µA
max
*
*
*
*
*
*
*
*
AD537JD
*
*
*
*
*
AD537KD
AD537KH
*
*
*
–55°C to +125°C
*
AD537SD
AD537SH
NOTES
*Specifications
same as AD537JH.
**Specifications same as AD537K.
1
Nonlinearity is specified for a current input level (I
IN
) to the converter from 0.1
µA
to 1000
µA.
Converter has 100% overrange capability up to I
IN
= 2000
µA
with slightly
reduced linearity. Nonlinearity is defined as deviation from a straight line from zero to full scale, expressed as a percentage of full scale.
2
Guaranteed not tested.
3
Maximum voltage input level is equal to the supply on either input terminal. However, large negative voltage levels can be applied to the negative terminal if the input is scaled to
a nominal 1 mA full scale through an appropriate value resistor (See Figure 2).
4
Loading the 1.0 volt or 1 mV/K outputs can cause a significant change in overall circuit performance, as indicated in the applications section. To maintain normal operation,
these outputs should be operated into the external buffer or an external amplifier.
5
Temperature reference output performance is specified from 0°C to +70°C for “J” and “K” devices, –55°C to +125°C for “S” model.
6
D = Ceramic DIP; H = Hermetic Metal Can. For outline information see Package Information section.
7
For AD537/883B specifications, refer to
Analog Devices Military Products Databook.
Specifications subject to change without notice.
–2–
REV. C
AD [ ANALOG DEVICES ]
