TC7126A
The TC7126A is a 3½ digit CMOS analog-to-digital converter (ADC) containing all the active components necessary to construct a 0.05% resolution measurement system. Seven-segment decoders, digit and polarity drivers, voltage reference, and clock circuit are integrated on-chip. The TC7126A directly drives a liquid crystal display (LCD), and includes a backplane driver. A low-cost, high-resolution indicating meter requires only a display, four resistors, and four capacitors. The TC7126A's extremely low power drain and 9V battery operation make it ideal for portable applications. The TC7126A reduces linearity error to less than 1 count. Roll-over error (the difference in readings for equal magnitude but opposite polarity input signals) is below ±1 count. High-impedance differential inputs offer 1 pA leakage current and a 1012 ohm input impedance. The 15 µVp-p noise performance guarantees a great reading, and the auto-zero cycle guarantees a zero display reading with a 0V input. The TC7126A features a precision, low-drift internal voltage reference and is functionally identical to the TC7126. A low-drift external reference is not normally required with the TC7126A.
Features- Fast Overrange Recovery, Guaranteed First Reading Accuracy
- Low Temperature Drift Internal Reference 35 ppm/°C Typ.
- 35 ppm/°C Typ.
- Guaranteed Zero Reading with Zero Input
- Low Noise: 15 µVp-p
- High Resolution: 0.05%
- Low Input Leakage Current: 1pA Typ., 10pA Max
- Precision Null Detectors with True Polarity at Zero
- High-Impedance Differential Input
- Convenient 9V Battery Operation
- Low Power Dissipation: 500µW Typ., 900µW Max.
| Parameter|
Parameter Name
Value
| Value | |
Supply Voltage (V)
9
|
9
| |
Power (mW)
0.5
|
0.5
| |
Resolution (Digits)
3.5
|
3.5
| |
Resolution (Counts)
2000
|
2000
| |
Display Type
LCD
|
LCD
| |
Temp. Range (°C)
-25 to 85
|
-25 to 85
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| TC7126ACKW | 44 | MQFP | 0C to +70C | TRAY | 10.08 | 8.40 | 7.64 | 6.37 | 5.88 |
| TC7126ACKW713 | 44 | MQFP | 0C to +70C | T/R | 10.08 | 8.40 | 7.64 | 6.37 | 5.88 |
| TC7126ACPL | 40 | PDIP | 0C to +70C | TUBE | 8.53 | 7.11 | 6.46 | 5.38 | 4.97 |
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RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| TC7126ACPL | 6.500000 | 10.600000 | 40 | PDIP | .600in | Matte Tin | e3 |  |  |
| TC7126ACLW | 2.375500 | 3.703704 | 44 | PLCC | - | Matte Tin | e3 | | |
| TC7126ACKW | 0.485400 | 3.895833 | 44 | MQFP | 10x10x2mm | Matte Tin | e3 | | |
| TC7126ACKW713 | 0.485400 | 1.296667 | 44 | MQFP | 10x10x2mm | Matte Tin | e3 | | |
