ADC-207MM Murata Power Solutions Inc, ADC-207MM Datasheet - Page 2

• Manufacturer Part Number: ADC-207MM
• Description: Analog To Digital Converter
• Manufacturer: Murata Power Solutions Inc

Functional Specifi cations
ANALOG INPUT
PARAMETERS
Power Supply Voltage (+V DD )
Digital Inputs
Analog Input
Reference Inputs
Digital Outputs
Lead Temperature (10 sec. max.)
(Typical at +5V power, +25°C, 20MHz clock, +REFERENCE = +5V,
–REFERENCE = ground, unless noted)
Input Type
Input Range (dc-20MHz)
Input Impedance
Input Capacitance (Full Range)
Logic Levels
Sample Pulse Width
Reference Ladder Resistance
Conversion Rate ➀
Harmonic Distortion ➁
Differential Gain ➂
Differential Phase ➂
Aperture Delay
Aperture Jitter
No Missing Codes
Integral Linearity ➃
Over Temperature Range
Differential Nonlinearity
Over Temperature Range
Power Supply Rejection
Data Coding
Data Output Resolution
Logic Levels
Output Data Valid Delay
Power Supply Range (+V
Power Supply Current
Power Dissipation
Footnotes:
➀ At full power input and chip selects enabled.
➁ At 4MHz input and 20MHz clock.
➂ For 10-step, 40 IRE NTSC ramp test.
➃ Adjustable using reference ladder midpoint tap. See ADC-207 Operation.
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
(During Sampling Portion of Clock)
(8MHz 2nd Order Harmonic)
LC/MC grade
LM/MM grade
Logic "1"
Logic "0" (at 1.6mA)
Logic Loading "1"
Logic Loading "0"
(From Rising Edge)
(short circuit protected to ground)
ABSOLUTE MAXIMUM RATINGS
DD
)
POWER REQUIREMENTS
DIGITAL OUTPUTS
DIGITAL INPUTS
PERFORMANCE
+3.2
+2.4
+3.0
MIN.
225
–55
12
20
–4
+4
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
0
7
LIMITS
–0.5 to +7
–0.5 to +5.5
–0.5 to (+V DD +0.5)
–0.5 to +V DD
–0.5 to +5.5
+300
TYP.
Single-ended, non-isolated
—
1000
10
—
—
±1
±1
—
330
25
–40
3
1.5
8
50
—
—
±0.8
±1
±0.3
±0.4
±0.02
Straight binary
—
+4.5
—
—
—
15
+5.0
+50
250
+125
+0.8
±0.5
±0.6
+0.4
+5.5
+70
+70
385
MAX.
+5
±5
±5
±1
17
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
UNITS
Volts
Volts
Volts
Volts
Volts
°C
%FSR/%Vs
microamps
microamps
degrees
Ohms
Ohms
UNITS
Volts
Volts
Volts
MHz
Volts
Volts
Volts
LSB
LSB
LSB
LSB
Bits
mW
mA
mA
mA
pF
dB
°C
°C
ns
ns
ps
ns
%
TECHNICAL NOTES
1. Input Buffer Amplifi er – Since the ADC-207 has a switched capacitor type input, the input
impedance of the 207 is dependent on the clock frequency. At relatively slow conversion rates,
a general purpose type input buffer can be used; at high conversion rates DATEL recommends
either the HA-5033 or Elantec 2003. See Figure 2 for typical connections.
2. Reference Ladder – Adjusting the voltage at +REFERENCE adjusts the gain of the ADC-207.
Adjusting the voltage at –REFERENCE adjusts the offset or zero of the ADC-207. The midpoint
pin is usually bypassed to ground through a 0.1µF capacitor, although it can be tied to a precision
voltage halfway between +REFERENCE and –REFERENCE. This would improve integral linearity
beyond 7 bits.
3. Clock Pulse Width – To improve performance at Nyquist bandwidths, the clock duty cycle can
be adjusted so that the low portion of the clock pulse is 12ns wide. The smaller aperture allows
the ADC-207 to closely resemble an ideal sampler. See Figure 4.
4. At sampling rates less than 100kHz, there may be some degradation in offset and differential
nonlinearity. Performance may be improved by increasing the clock duty cycle (decreasing the
time spent in the sample mode).
CAUTION
Since the ADC-207 is a CMOS device, normal precautions against static electricity should be
taken. Use ground straps, grounded mats, etc. The Absolute Maximum Ratings of the device
MUST NOT BE EXCEEDED as irrevocable damage to the ADC-207 will occur.
0.1µF
0.1µF
PARAMETERS
Operating Temp. Range, Case:
Storage Temp. Range
Package Type
LC/MC Versions
MM/LM/QL Versions
DIP
LCC
5
47µF
47µF
HA-5033
+
+
Figure 2. Typical Connections for Using the ADC-207
+15
–15
12
10
11
10 W
PHYSICAL/ENVIRONMENTAL
+5V
CLOCK
20MHz
0.1µF
MIN.
–55
–65
0
1
5
6
7
9
2
3
4
8
CLOCK
DIGITAL GND
–REFERENCE
V
MID
+REFERENCE
ANALOG GND
CS1
CS2
IN
TYP.
—
—
—
18-pin ceramic DIP
24-pin ceramic LCC
4.7µF
+
0.01µF
MAX.
+125
+150
+70
+V
OF
B6
B5
B4
B2
B7
B3
B1
DD
18
+5V
17
16
15
14
13
12
11
10
B7
B6
B5
B4
B3
B2
B1
OF
UNITS
(LSB)
(MSB)
°C
°C
°C