Part Datasheet Review

Created a project doc

MAX9526AEI+ Part Review

View Document
Official datasheet already set: https://www.analog.com/media/en/technical-documentation/data-sheets/max9526.pdf Manufacturer: Analog Devices...

flux

Completed the MAX9526AEI+ datasheet review and grouped every pin exactly once by primary function. The official Analog Devices datasheet was already set, pinout matched the 28-QSOP datasheet, and I updated pin groups, sections, pin types, orientations, and descriptions.
Open items:
  • Exact Maxim/ADI land pattern 90-0173 dimensions were not available in the extracted datasheet text, so the footprint was verified by package type, 28-pad count, and QSOP pitch rather than full dimensional QA.
Suggested next steps:
  1. Review the detailed findings in MAX9526AEI+ Part Review.
  2. If needed, provide the official land-pattern drawing for a stricter footprint audit.
  3. Next, I can update symbol placement visually so the grouped pins render cleanly by function.
A

adrian95

  • Make the functional group more general.
  • Add a Section property to all pins, and apply the same value used in the Pin Group property to each pin's Section property.
Assign a Terminal Order from 1 to 10, starting with Power. Power should be Terminal Order 1, and Ground should be last, Terminal Order 10. For Orientation, set Power to "Top" and Ground to "Bottom." For the remaining sections/groups, you may decide the Terminal Order and Orientation yourself. For Orientation, distribute them between "Left" and "Right" — don't put everything on one side. Each group/section should have a different orientation.

flux

I’ll generalize the pin groups, mirror each Pin Group into Section, then assign Terminal Order and orientations with Power at top/order 1 and Ground at bottom/order 10.

flux

Updated all pins with more general functional groups and matched each pin’s Section to its Pin Group.
Open items:
  • Flux warned that “Reserved” is not a standard suggested Pin Group/Section value, but I kept it for the I.C. pin because that best reflects its datasheet role without incorrectly mixing it into another group.
Suggested next steps:
  1. Visually rearrange the symbol pins to reflect the new grouping/orientations.
  2. Run a final symbol/footprint QA pass before publishing the part.
Arrange and QA
Arrange symbol pins
Run final QA
Check Reserved pin
Update review document
Sign up to send

Files

Pins

Symbol

Layout

Preview

D0
Pin Number
15
D2
Pin Number
17
VIN2
Pin Number
3
D5
Pin Number
20
XTAL2
Pin Number
6
D6
Pin Number
25
DGND_1
Pin Number
11
LLC
Pin Number
21
DEVADR
Pin Number
9
VREF
Pin Number
2
SDA
Pin Number
12
I.C.
Pin Number
8
D4
Pin Number
19
XTAL/OSC
Pin Number
7
SCL
Pin Number
13
VIN1
Pin Number
1
AVDD
Pin Number
5
DVDD_2
Pin Number
22
DVDDIO
Pin Number
24
D7
Pin Number
26
AGND
Pin Number
4
DGND_2
Pin Number
23
D1
Pin Number
16
D3
Pin Number
18
D9
Pin Number
28
DVDD_1
Pin Number
10
~IRQ
Pin Number
14
D8
Pin Number
27
MAX9526AEI+ Part Review
Source
Key Datasheet Specs
  • Supported video standards: NTSC M/J/4.43; PAL B/G/H/I/D/M/N/60
  • Function: 2:1 composite video mux plus decoder with AGC
  • ADC / processing: 10-bit, 4x oversampling, 54Msps ADC with true 10-bit digital processing
  • Output formats: 10-bit parallel ITU-R BT.656 with embedded TRS; 8-bit parallel BT.656 with separate HS/VS
  • Analog supply AVDD: 1.7V to 1.9V, 1.8V typical
  • Digital core supply DVDD: 1.7V to 1.9V, 1.8V typical
  • Digital I/O supply DVDDIO: 1.7V to 3.45V, 3.3V typical
  • Operating temperature: -40°C to +125°C
  • Normal current: AVDD typ 42mA/max 55mA; DVDD typ 70mA/max 110mA; DVDDIO typ 3.5mA at 1.8V or 6.4mA at 3.3V
  • Absolute maximum supply ratings: AVDD/DVDD to their grounds -0.3V to +2V; DVDDIO to DGND -0.3V to +3.6V
  • Required bypassing from pin table: AVDD 0.1uF to AGND; VREF 0.1uF to AGND; DVDD 0.1uF in parallel with 10uF to DGND; DVDDIO 0.1uF to DGND
  • I2C/control pullups: SDA, SCL, and IRQ each use 10k pullup to DVDDIO for full output swing
Pinout Cross-Check
The schematic symbol has 28 terminal components and the pin numbers/names match the 28-QSOP datasheet pinout:

Table

PinSymbol terminalDatasheet functionAssigned group
1VIN1Composite video input 1Analog
2VREFVideo reference bypassReference
3VIN2Composite video input 2Analog
4AGNDAnalog groundGround
5AVDDAnalog +1.8V supplyPower
6XTAL2Crystal terminal / ground if external clock usedClock
7XTAL/OSCCrystal/oscillator or external clock inputClock
8I.C.Internal connection, connect to DGNDReserved
9DEVADRI2C device address select inputControl Bus
10DVDD_1Digital +1.8V supplyPower
11DGND_1Digital groundGround
12SDAI2C serial data input/outputControl Bus
13SCLI2C serial clock inputControl Bus
14~IRQOpen-drain interrupt outputControl Bus
15D0Digital video output bit 0, LSBData Bus
16D1Digital video output bit 1Data Bus
17D2Digital video output bit 2Data Bus
18D3Digital video output bit 3Data Bus
19D4Digital video output bit 4Data Bus
20D5Digital video output bit 5Data Bus
21LLC27MHz line-locked clock outputClock
22DVDD_2Digital +1.8V supplyPower
23DGND_2Digital groundGround
24DVDDIODigital I/O supply, 1.7V to 3.45VPower
25D6Digital video output bit 6Data Bus
26D7Digital video output bit 7Data Bus
27D8Digital video output bit 8Data Bus
28D9Digital video output bit 9Data Bus
Pin Grouping Applied
Each pin is assigned to exactly one functional group. Section was set equal to Pin Group for every pin.
  • Power: AVDD, DVDD_1, DVDD_2, DVDDIO
  • Ground: AGND, DGND_1, DGND_2
  • Analog: VIN1, VIN2
  • Reference: VREF
  • Clock: XTAL2, XTAL/OSC, LLC
  • Control Bus: DEVADR, SDA, SCL, ~IRQ
  • Data Bus: D0-D9
  • Reserved: I.C.
Footprint Cross-Check
  • Current footprint asset: SOP64P602X175-28N.kicad_mod
  • Pad count: 28 SMD pads
  • Pad pitch from footprint coordinates: approximately 0.635mm, matching a QSOP/SOP64 naming convention
  • Datasheet ordering information: MAX9526AEI+ is 28 QSOP, package code E28-1
  • Datasheet package table points to outline 21-0055 and land pattern 90-0173
The footprint appears consistent with a 28-pin QSOP package. Exact land-pattern dimensions from Maxim/ADI land pattern 90-0173 were not present in the extracted datasheet text, so pad geometry was checked by package type, pad count, and pitch rather than against the full official dimensional drawing.
Mismatches / Issues Flagged
  • No pinout mismatches found: all 28 QSOP pins match the datasheet pin names and pin numbers.
  • No datasheet URL issue: the official Analog Devices PDF was already set.
  • No footprint pad-count mismatch found: footprint has 28 SMD pads for the 28-QSOP package.
  • Initial issue fixed: terminal Pin Type values were unspecified before review; pins now have datasheet-based Pin Type, Pin Group, Section, Terminal Order, Pin Orientation, and Pin Description values.
  • Caution: the I.C. pin is not a no-connect; datasheet says to connect it to DGND. It is grouped as Reserved and described accordingly.
  • Caution: exact official land pattern 90-0173 should be used for final footprint QA if a manufacturing-critical footprint audit is required.

  • Source

  • Key Datasheet Specs

  • Pinout Cross-Check

  • Pin Grouping Applied

  • Footprint Cross-Check

  • Mismatches / Issues Flagged