VFC32 Datasheet, PDF (2/7 Pages) Burr-Brown (TI) – Voltage-to-Frequency and Frequency-to-Voltage CONVERTER

SPECIFICATIONS
At T_A = +25°C and V_CC = ±15V, unless otherwise noted.
PARAMETER
CONDITIONS
INPUT (V/F CONVERTER) F_OUT = V_IN/7.5 R₁ C₁
Voltage Range⁽¹⁾
Positive Input
Negative Input
Current Range⁽¹⁾
Bias Current
Inverting Input
Noninverting Input
Offset Voltage⁽²⁾
Differential Impedance
Common-mode
Impedance
INPUT (F/V CONVERTER) V_OUT = 7.5 R₁ C₁ F_IN
Impedance
Logic “1”
Logic “0”
Pulse-width Range
ACCURACY
Linearity Error⁽³⁾
Offset Error Input
Offset Votlage⁽²⁾
Offset Drift⁽⁶⁾
Gain Error⁽²⁾
Gain Drift⁽⁶⁾
Full Scale Drift
(offset drift and
gain drift)^{(6, 7)}
Power Supply
Sensitivity
0.01Hz ≤ Oper
Freq ≤ 10kHz
0.1Hz ≤ Oper
Freq ≤ 100kHz
0.5Hz ≤ Oper
Freq ≤ 500kHz
f = 10kHz
f = 10kHz
f = DC, ±V_CC = 12VDC
to 18VDC
OUTPUT (V/F CONVERTER) (open collector output)
Voltage, Logic “0”
Leakage Current,
I_SINK = 8mA
Logic “1”
Voltage, Logic “1”
V_O = 15V
External Pull-up Resistor
Required (see Figure 4)
Pulse Width
For Best Linearity
Fall Time
I_OUT = 5mA, C_LOAD = 500pF
OUTPUT (F/V CONVERTER) V_OUT
Voltage
Current
Impedance
I_O ≤ 7mA
V_O ≤ 7VDC
Closed Loop
Capacitive Load
Without Oscillation
DYNAMIC RESPONSE
Full Scale Frequency
Dynamic Range
Settling Time
Overload Recovery
(V/F) to Specified Linearity
for a Full Scale Input Step
< 50% Overload
POWER SUPPLY
Rated Voltage
Voltage Range
Quiescent Current
TEMPERATURE RANGE
Specification
Operating
Storage
VFC32KP, KU
MIN
TYP MAX
>0
+0.25mA
x R₁
>0
–10
>0
+0.25
20
100
100
250
1
4
300 || 10 650 || 10
300 || 3 500 || 3
50 || 10
0.1
150 || 10
+1.0
–0.05
150k/F_MAX
±0.005 ±0.010⁽⁴⁾
±0.025 ±0.05
±0.05
1
4
±3
5
±75
±75
±0.015
0
0.2
0.4
0.01
1.0
V_PU
0.25/F_MAX
400
0 to +10
+10
6
(9)
(9)
1
100
500⁽⁸⁾
±15
±11
±20
±5.5
±6.0
0
+70
–25
+85
–25
+85
VFC32BM
MIN TYP MAX
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
±50 ±100
±50 ±100
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
–25
+85
–55
+125
–65
+150
VFC32SM
MIN
TYP MAX
UNITS
V
V
V
V
V
V
V
V
mA
V
V
V
V
V
V
V
V
nA
nA
mV
kΩ || pF
V
V
MΩ || pF
V
V
V
V
V
V
V
V
kΩ || pF
V
V
µs
V
V
% of FSR⁽⁵⁾
V
V
% of FSR
V
% of FSR
V
V
mV
V
ppm of FSR/°C
V
% of FSR
±70 ±150
ppm/°C
±70 ±150 ppm of FSR/°C
V
% of FSR/%
V
V
V
V
V
V
µA
V
V
V
s
V
ns
V
V
V
mA
V
Ω
V
pF
V
V
V
V
kHz
decades
V
V
V
V
mA
–55
+125
°C
–55
+125
°C
–65
+150
°C
V Specification the same as VFC32KP.
NOTES: (1) A 25% duty cycle (0.25mA input current) is recommended for best linearity. (2) Adjustable to zero. See Offset and Gain Adjustment section. (3) Linearity error is specified
at any operating frequency from the straight line intersecting 90% of full scale frequency and 0.1% of full scale frequency. See Discussion of Specifications section. Above 200kHz,
it is recommended all grades be operated below +85°C. (4) ±0.015% of FSR for negative inputs shown in Figure 5. Positive inputs are shown in Figure 1. (5) FSR = Full Scale Range
(corresponds to full scale frequency and full scale input voltage). (6) Exclusive of external components’ drift. (7) Positive drift is defined to be increasing frequency with increasing
temperature. (8) For operations above 200kHz up to 500kHz, see Discussion of Specifications and Installation and Operation sections. (9) One pulse of new frequency plus 1µs.
VFC32
2