FX629J CMLMICRO [CML Microcircuits], FX629J Datasheet - Page 9

• Manufacturer Part Number: FX629J
• Description: Delta Modulation Codec
• Manufacturer: CMLMICRO [CML Microcircuits]

Specifications ......
Process Information
The following Table gives details of the process and test controls employed in the manufacture of the FX629
'Mil Std' Delta Codec.
Notes: 1. Dynamic characteristics are specified at 5V unless otherwise specified.
Application Recommendations
Due to the very low levels of signal and idle channel noise required in Military applications – a noisy or badly
regulated power supply could cause instability putting the overall system performance out of specification.
Adherence to the points noted below will assist in minimizing this problem.
(a)
the printed circuit board.
(b)
Figure 3) should be kept close to the package.
(c)
Encoder Input capacitor and the V
(d)
analogue inputs and outputs.
Function
Hermeticity
Fine Leak Test –
Coarse Leak Test –
Burnin
Temperature Cycling
Vibration
Shock
Low Pressure
Humidity
Transport and Storage –
Operation –
Care should be taken on the design and layout of
All external components (as recommended in
Tracks should be kept short, particularly the
Xtal/clock tracks should be kept well away from
2. All logic inputs except, Encoder and Decoder Data Clocks.
3. For an Encoder/Decoder combination, insertion loss contributed by a single component is half this
4. Driven with a source impedance of <100 .
5. Recommended values – See Figures 5, 6, 7 and 8.
6 Group Delay Distortion for the full codec is relative to the delay with 820Hz, -20dB at the encoder input.
7. An Emitter Follower output stage.
8. 4.0V = 80% V
9. Analogue Voltage Levels used in this Data Sheet: 0dBm0 = 489mVrms = - 4dBm = 0dB.
figure.
-15dBm0 = 87mVrms. - 20dBm0 = 49mVrms = - 24dBm.
DD
The following mechanical assembly tests are Qualified to BS9450
, 3.5V = 70% V
BIAS
capacitor.
Reference
Mil Std 883C
Mil Std 883C
Mil Std 883C
Mil Std 883C
BS9450
BS9450
BS9450
BS9450
DD
, 1.5V = 30% V
9
using Method 1014 – test condition A1.
225mmHg (altitude 9000m).
Remarks
using Method 1014 – test condition C.
using Method 1015 – test condition E.
168 Hours @ 85 C with 5v power, and clocks applied.
using Method 1010 – test condition B.
10 cycles -55 C to +125 C.
Section 1.2.6.8.1
55Hz to 500Hz at 98 m/sec acceleration.
Section 1.2.6.6
981 m/sec for 6 msec.
Section 1.2.6.12
600mmHg (altitude 2400m).
Section 1.2.6.4
96 Hours @ 45 C, 95% relative humidity plus condensed
water.
(e)
possible.
(f)
eliminating external pick-up on the input and output
pins.
(g)
have less than 1mVrms of noise allowed.
(h)
must be less than 100 , Output Idle channel noise
levels will improve with even lower source impedances.
DD
, 1.0V = 20% V
Inputs and outputs should be screened wherever
A "ground plane" connected to V
It is recommended that the power supply rails
The source impedance to the Encoder Input pin
DD
.
SS
will assist in